By
An Assessmen and ad ise o snow
c ab in wes G eenland 2011
nDo e Bu meis e a Helle Siegs ad
By
AnnDo e Bu meis e
TEKNISK RAPPORT NR. 83, 2010
Snow c ab s ock s a us and ad iso y epo
2011
2
Ti el: Assessmen and ad ice o Snow C ab in Wes G eenland 2010
Fo a e (e): AnnDo e Bu meis e
Se ie i el og numme : Teknisk appo n . 83
Udgi e : Pinngo i ale i ik, G ønlands Na u ins i u
Udgi elses idspunk : No embe 2010
O e sæ else:
Finansie ing:
Fo side o o: AnnDo e Bu meis e
ISBN: 87-91214-51-3
ISSN: 1397-3657
Bedes ci e e : Bu meis e , AD. 2010. Asessmen o snow c ab in Wes G eenland
2011 Teknisk Rappo n . 83, Pinngo i ale i ik, G ønlands Na u ins i-
u
Rek i e es: Rappo en e udelukkende udgi e elek onisk. PDF- il a
Rappo en indes på ins i u e s hjemmeside
h p://www.na u .gl/publika ione / ekniske appo e
De e mulig a ek i e e en udsk i a appo en he :
Pinngo i ale i ik, G ønlands Na u ins i u
Pos boks 570
3900 Nuuk
G ønland
Tl . +299 36 12 00
Fax. +299 36 12 12
in o@na u .gl
www.na u .gl
T68nisk appo n . 68, 2007
Pinngo i ale i ik, G ønlands Na u ins i u
Snow c ab s ock s a us and ad iso y epo
2011
3
Assessmen and ad ice o Snow C ab in Wes G eenland 2011
In oduc ion
This epo documen s he scien i ic basis o he assessmen o snow c ab (Chionoece es opilio) s ocks in
Wes G eenland. Snow c abs a e pa chily dis ibu ed and comme cially exploi ed along he coas and wi hin
he jo ds. The ishe y is managed by quo as and assessed when da a a e a ailable wi hin he insho e and
o sho e o 6 managemen a eas (Upe na ik, Uummannaq-Disko Bay, Sisimiu , Manii soq-Kangaamiu ,
Nuuk-Paamiu and Na saq-Qaqo oq. The epo b ie ly upda es and summa izes he his o ical backg ound
o comme cial c ab ishing, which includes ca ch, e o , CPUE and spa ial dis ibu ion o he ishe y, as well
as he esul s om scien i ic su eys unde aken by he G eenland Ins i u e o Na u al Resou ces (GINR).
The e a e no speci ic long- e m managemen objec i es o he snow c ab esou ce in Wes G eenland.
Howe e , since 2004 he main objec i e o ecommenda ions om GINR has been o s op he decline in
biomass o he c ab esou ce in he di e en managemen a eas.
Summa y
Managemen a ea Disko Bay - Uummannaq
The ecommended ca ch le el o 2011 in Disko Bay insho e is 600 ons and unchanged om 2010.
The quo a should be di ided on 200 ons in he sou he n pa o Disko Bay, 200 ons in he No he n
pa o he bay and 200 ons in Vaiga .
Managemen a ea Sisimiu
The ecommended ca ch le el o 2011 in Sisimiu insho e is 500 ons, di ided on 200 ons in he
adi ionally ishing a ea and 300 ons in Nd . Iso oq and Nd . S oem jo d.
The o sho e a ea a e ecommended closed o ishe y in 2011
Managemen a ea Nuuk - Paamiu
The ecommended ca ch le el o 2011 in Nuuk – Paamiu insho e is 200 ons.
The ecommended ca ch le el o 2011 in Nuuk - Paamiu o sho e is 1,000 ons. The ecommended
ca ch le el was 1.600 ons in 2010.
Managemen a ea Manii soq - Kangaamiu
Due o he lack o su ey and ishe y da a no ecommenda ion is gi en o Manii soq - Kangaamiu
insho e and o sho e.
Managemen a ea Na saq - Qaqo oq
Due o he lack o su ey and ishe y da a no ecommenda ion is gi en o Na saq - Qaqo oq
insho e and o sho e.
Snow c ab s ock s a us and ad iso y epo
2011
4
Gene al ecommenda ion and ad ice
GINR ecommends a seasonal ishe y om Ap il o July in all managemen a eas o educe
disca ding and associa ed mo ali y o so -shelled c abs and o maximize ec ui men o he s ock.
Such a seasonal ishe y will also p omo e he mos op imal and sus ainable u iliza ion o he c ab
esou ce.
Resou ce s a us in each managemen a ea de i ed om ishe y da a
An o e iew o GINR‟s ecommenda ions and he imposed quo a and ishing s a us (open o closed) o he
managemen a eas in 2011 a e gi en in Table 1.
Table 1. Summa y o ca ch ecommenda ions o he c ab ishe y in 2011 om he G eenland Ins i u e o Na u al
Resou ces and o al ca ch om 2009 (ca ch s a is ics o 2010 a e incomple e a his ime).
Recommended
ca ch Insho e
2011 in ons
Recommended
ca ch O sho e
2011 in ons
Ca ch in ons
2009 Insho e
Ca ch in ons
2009
O sho e
Recommended
ca ch Insho e
2010 in ons
Recommended
ca ch O sho e
2010 in ons
Disko Bay
600
130
471
186
600
130
Sisimiu
500
Cloosed
597
354
500
200
Manii soq
No ad ice
No ad ice
88
171
No ad ice
No ad ice
Nuuk-Paamiu
200
1.000
435
676
200
1.600
Na saq - Kap Fa el
No ad ice
No ad ice
187
-
Ingen
Ingen
Recommended ca ch
in all
1.000
1.330
1.778
1.387
1.300
1.930
Snow c ab s ock s a us and ad iso y epo
2011
5
Species biology
Snow c ab habi a include si es we e bo om is
co e ed by mud/sand and ock. Thei die s inclu-
de b i le s a s, sh imp, younge s ages o snow
c ab (cannibalism), clams, polychae e wo ms and
o he c us aceans. P eda o s a e a ious g ound-
ish, snow c ab and human.
Snow c ab ha ching hei b oods in sp ing and
la ae unde go wo plank onic la al s ages and
se le o bo om du ing all. Ben hic ju eniles snow
c ab males as well as emales mol equen ly and
become sexually ma u e om > 50 mm ca apace
wid h (CW) depending on bo om empe a u e.
Snow c abs end o mol du ing sp ing and
con inue un il e minal mol a adul hood is
eached wi hin a size ange o 50 – 130 mm CW
o males and 40 – 95 mm CW o emales. A he
e minal mol males de eloping enla ges claws
imp o ing hei ma ing abili y. Only a po ions o
any gi en coho ec ui o he ishe y a 100 mm
CW, whe e he males is app ox. 9 o 10 yea s.
Rec ui men is pe iodic o episodic and a ies
conside ably o e a cycle o 8 o 12 yea s.
A e he mol o adul hood legal sized males
emain so /new shelled ha ing low mea yield o
he es o he yea . In he ollowing yea , mea
yield would ha e inc eased o a sui able le el o
he indus y. Disca d o so shell and new-shelled,
due o hei low yield con en s is esou ces was-
age.
His o ical ishe y backg ound
Snow c abs a e dis ibu ed along he Wes coas
o G eenland and a e comme cially exploi ed
p ima ily om Disko Bay in he No h (up o 71
30N) o Paamiu in he Sou h (60 45N).
Comme cial ishe y o snow c ab began p ima ily
in insho e a eas (wi hin basis-line) in he mid-
1990s and om 1999, also included o sho e
a eas (ou side basis-line).
Since 2004, he c ab esou ce in G eenland has
been managed in 6 a eas ( om No h o Sou h -
Upe na ik, Uummannaq-Disko Bay, Sisimiu ,
Manii soq-Kangaamiu , Nuuk-Paamiu and
Na saq-Qaqo oq, see Fig. 1). The ishing lee is
made up o wo componen s; small essels (less
han 75 GRT), which ha e exclusi e igh s o
ishing insho e wi hin he basis-line as well as
o sho e. Small essels a e, howe e , es ic ed o
ishing in only 2 managemen a ea du ing he
yea . La ge essels (g ea e han 75 GRT) may
only ish in all o sho e a eas (ou side he basis-
line), bu no wi hin he “C ab Boxes”. Quo a
es ic ions ha e been imposed o each o he 6
managemen a ea since 1995 and indi idual
quo as o essels la ge > 75 GRT, bu ha e only
limi ed he ca ch in 2004. Managemen decisions
allow inc easing quo a in each o he 6
managemen a ea, when he ca ch achie ed he
i s ixed quo a. Un-used quo a om la ge
essels is e-alloca ed o he insho e lee (small
essels < 75 GRT). Basically, he e is now quo a
es ic ion o he small essel.
The ishe y is egula ed by p ohibi ions o land
emales and unde sized males (<100 mm CW),
logbooks o all essels la ge han 10 me e s and
closu e o he ishe y no h o 64°N o 3 mon hs
(1 Janua y o 31 Ma ch). The e is also a
egula ion ha s a es mo emen o he ishing
e o when so -shelled c abs exceed 20% o he
ca ch, howe e he e m “mo emen ” is no
speci ic and his is no moni o ed. F om 2005 o
2007, he o sho e c ab ishe y was closed in he
managemen a eas Manii soq-Kangaamiu and
om 2005 o Augus 2007 in he o sho e a ea o
Sisimiu excep o dispensa ion o 1 essel ha
was allowed o ish in 2005. Only in 2006, he
ishe y was closed o 2½ mon hs (July 1 o
Sep embe 15) in all a eas excep Uumannaq-
Disko Bay (closed only 1 mon h om July 1 –
Augus 3) o p o ec so -shelled c abs.
Snow c ab s ock s a us and ad iso y epo
2011
6
The numbe o essels wi h licenses o pa icipa e
in he snow c ab ishe y inc eased by mo e han a
ac o o 3 om app ox. 120 o 374 boa s om
1999-2002. Since hen he numbe o bo h la ge
and small essels ha e dec eased subs an ially
as he abundance o he esou ce has also
declined. In 2008 he numbe license holde s
amoun ed 74 in all managemen a eas an 80%
educ ion compa ed o 2002. In 2009 numbe o
license inc eased o 117.
G eenland Ins i u e o Na u al Resou ces (GINR)
p o ide s ock assessmen and o al allowable
ca ch (TAC) ad ice o he s ock bo h insho e and
o sho e wi hin each managemen a ea when
su icien da a is a ailable. The decision o gi e
ad ice o bo h insho e and o sho e a eas was
based on he assump ion ha snow c ab mig a-
ion is limi ed ( agging s udies ha e indica ed
app ox. 10 km pe yea ) and he e o e he esou -
ce in di e en a eas is conside ed o be spa ially
independen .
Comme cial ishe y da a
Logbooks om he la ge essels >75 GRT ha e
been manda o y since 1999 in conjunc ion wi h
he s a o o sho e ishing wi h essels o his
size. Logbooks o he small essels (<75 GRT)
we e i s manda o y om July 2002, and hus i s
co e ed he annual ishe y in 2003. Only landing
s a is ics a e a ailable om boa s less han 10
me e s as hey a e no equi ed o epo ca ches
in logbooks.
Ca ch, E o and CPUE
The his o ical de elopmen o he c ab ishe y in
G eenland is shown in Figu e 2. Landings
inc eased om app ox. 1,000 ons in 1995 o a
peak o app ox. 15,000 ons (Quo a 26,800 ons)
in 2001 (based on landings om small essels
and ca ch om logbook da a om la ge essels
>75 GRT). F om 2001 o 2007 o al ca ch
dec eased by app ox. 89% o 2,189 ons (Quo a
4,380 ons). Landings inc ease o 3,191 ons
(Quo a 4,680 ons) in 2009 and p elimina y da a
indica e an addi ional dec ease in landings in
2010 (app ox. 1.800 ons ul imo Oc obe 2010,
Quo a 4,050 ons).
In 2008 and 2009 quo a was inc eased om 500
ons o 800 ons in he managemen a ea Sisimiu
and om 700 ons o 1000 ons in Nuuk - Paamiu
managemen a ea (only in 2009). The inc easing
quo a was based on e-alloca ion ( emo ing a pa
o he quo a om i e essels > 75 GRT) allowing
small essel < 75 GRT o inc ease ca ches
insho e as well as o sho e.
The dis ibu ion o landings and geog aphic
dis ibu ion o he ishe y in each managemen
a ea in Fig. 3 and Fig. 4, show ha mos o he
landings in 2008 ha e p edomina ely come om
managemen Sisimiu (42%), whe e as Disko
Bay–Uummanaq and Nuuk-Paamiu amoun ed
27% and 26% espec i ely o he o al landings.
The o al ishing e o ( ap hauls) has declined by
91% since 2001 ( om 3,416 o 323 housand ap
hauls du ing 2001-2008) (Fig. 3). The decline has
been mos ly due o a declining numbe o
pa icipan s in he ishe y. P elimina y and incom-
ple e logbook da a o 2010 shows o al e o is
220 housand ap hauls. The o e all dis ibu ion
o he ishe y along he Wes coas o G eenland
om 2003-2009, de i ed om a ailable logbook
da a is shown in Figu e 4.
Resea ch Su eys
Since 1997, ap su eys ha e been conduc ed
annually in insho e a eas o Disko Bay and Sisi-
miu . In 2000, a Sisimiu o sho e a ea (Hols eins-
bo g Dyb) was included in he Sisimiu ap
su ey. In 2002, annual o sho e ap su eys
we e ini ia ed in a eas be ween Nuuk and Paamiu
and in 2003 we e ex ended no h o include he
o sho e in he Manii soq-Kangaamiu manage-
men a ea.
Snow c ab s ock s a us and ad iso y epo
2011
7
Me hods
Snow c abs a e sampled wi h Japanese-s yle
conical aps wi h la ge (70 mm) and small (21
mm) mesh sizes. Sampling s a ions a e a p ede-
e mined ixed posi ions o all yea s and soak
imes ange be ween 14-24 h s depending on
wea he condi ions. Bo om empe a u es a e e-
co ded a each s a ion.
Fo males, he ca apace wid h (CW) and chela
heigh (CH) a e measu ed (± 0.01 mm) o de e -
mine size and mol s a us (adolescen o adul ).
Male snow c abs s op g owing a e hei e minal
moul . Sexually ma u e males a e e e ed o as
adolescen s ( ecognized by hei small claws)
p io o he e minal mol and as adul s a e hei
e minal mol (la ge claws). Males each legal size
(100 mm CW) a abou 9 yea s o age. The
ange o ca apace wid hs de ining he adolescen
male g oups which a e p esumably 1, 2 and 3
yea s om ec ui men o legal size a e: ADO-1,
82.2-100mm CW; ADO-2, 67.3-82.2mm CW and
ADO-3, 53.2-67.3mm CW.
Fo emales, he CW and abdomen wid h (AW)
a e measu ed (± 0.01mm) o de e mine size and
ma u i y. Females ha ha e ma ed once and a e
ca ying hei i s clu ch o eggs a e called
p imipa ous, while emales ha a e ca ying hei
second clu ch and ha e ma ed mo e han once
a e called mul ipa ous. They a e dis inguishable
by he numbe o sca s on hei legs caused by
ma ing and by shell condi ions. Shell condi ion in
bo h males and emales is de e mined on a scale
o 1-5 acco ding o guidelines by Sain e-Ma ie
(1993).
Da a om ap su ey ca ches o males a e used
o de e mine CPUE (kg/ ap), mean CW o legal-
size males, shell condi ion and NPUE (numbe -
/ ap) o adolescen males o assess ec ui men
p ospec s. Male and emales size dis ibu ions a e
also desc ibed o ollow he p og ession o size
modes h ough he popula ions and de e mine p i-
mipa ous/mul ipa ous a ios wi hin he emale po-
pula ion.
Insho e su eys in Disko Bay and Sisimiu
In Disko Bay, 43 s a ions a e sampled annually
(Fig. 5a) and in Sisimiu , 40 s a ions a e sampled
(Fig. 5b), om May o June. The sampling gea
consis s o a longline o 10 la ge-mesh (70mm)
and 2 small-mesh (21mm) conical aps ished a
dep hs anging om 100-600m. T aps a e placed
app ox. 40m apa and bai ed wi h squid.
O sho e su eys in Sisimiu , Manii soq and Nuuk-
Paamiu
Fi een s a ions a e sampled annually in Sisimiu
o sho e (Fig. 5b) in June and a o al o 30-60 s a-
ions a e sampled in he Nuuk-Paamiu and Ma-
nii soq o sho e a eas in Augus -Sep embe (Fig.
5c). The sampling me hod in Sisimiu o sho e is
he same as he me hod used insho e in Disko
Bay and Sisimiu . In 2002, he sampling in he
Nuuk-Paamiu o sho e su ey was also he same
as he me hod insho e. In 2003, howe e , he
o sho e sampling me hod used in Nuuk-Paamiu
and Manii soq was changed such ha each
s a ion was hen sampled using a long line o 16
aps, eigh la ge-meshed aps al e na ing wi h
eigh small-meshed aps a app ox. 40m apa
and bai ed wi h squid.
Inpu da a om comme cial ishe y o assessmen
No sampling om he comme cial ishe y has
been conduc ed since he ishe y began in 1996.
A ailable logbook and landing s a is ics is used in
da a analysis om he comme cial ishe y. Log-
books nominal ca ches has since 2003 co e ed
mo e han 85% o he o al landings in G eenland.
Be o e 2003 less han 20% o he ishing lee
we e using logbooks.
In o de o calcula e a s anda dised CPUE index,
a GLM analysis (mul iaddi i e model) was ca ied
ou using haul by haul logbook in o ma ion
Snow c ab s ock s a us and ad iso y epo
2011
8
including ze o ca ches. The model includes yea ,
mon h and essel e ec s.
Managemen a ea: Uummannaq-Disko Bay
The his o ical ca ch, CPUE and e o da a o he
ishe y in Uummannaq-Disko Bay in he insho e
and o sho e a eas a e summa ized in Table 2.
Da a o 2010 a e p elimina y.
One o he mos impo an ishing a eas has been
Disko Bay whe e ca ches a e p edomina ely om
he insho e. To al ca ches peaked a 4,202 ons
(94% insho e) in 2001 and since hen ha e s eadi-
ly declined o 657 ons (84% insho e) in 2009, ap-
p oxima ely 16% o he 2001 ca ch.
Numbe o pe mi s as well as numbe o ac i e
essels has dec eased o e ime. In 2003, 43
pe mi s we e gi en o he managemen a ea, bu
only 31 essels we e ac i e ha yea . In 2009
he e 22 pe mi s we e issued and 12 essels we e
pa icipa ed in he ishe y.
Insho e - Disko Bay
Fishe y
The dis ibu ion o he ishe y in Disko Bay om
2003 o 2008, acco ding o a ailable logbook da a
is shown in Figu e 6. Fishing g ounds include bo h
Vaiga , a ea “Disko No h” and “Disko Sou h”. The
geog aphic dis ibu ion o he ishe y has been
homogeneous in he pe iod om 2003 o 2008,
al hough o al ca ches, CPUE used e o has
changed ma kedly. In con as o he p e ious
yea s, 2009 and 2010 p elimina y da a indica e a
e y limi ishe y in he a ea “Disko No h”.
The ishe y in Disko Bay s a s in Ap il, peaks
du ing he summe mon hs (June-July) and
s eadily declines owa ds he end o he yea ,
excep in 2007 when he ishe y inc eased du ing
all and peaked in Oc obe (Fig. 7). The empo al
pa e n o CPUE in 2009 showed CPUE peaked in
July and Augus and dec eased as he season
p og essed.
A s anda dized CPUE index (Fig. 8), show a
signi ican d opped in CPUE om 2001 o 2004
om app ox. 7.6 kg/ ap o 3.6 kg/ ap (F= 37.04,
P < 0.0001). In he ollowing yea s CPUE has
s aidly inc eased o app ox. 5 kg/ ap in 2008 and
2009. P elimina y da a o 2010 indica e s able
ends in CPUE (Table 2) and (Fig. 8).
F om 2000-2001 ca ches insho e inc eased om
2,940 – 3,950 ons as e o mo e han doubled
( able 2). CPUE, howe e , dec eased om 4.8 o
3.1 kg pe ap. Ca ches and e o ha e
signi ican ly declined since 2001 by app oxima ely
88% o 471 ons and 93 housand ap hauls,
espec i ely, in 2009 (Table 2 and Fig. 8).
S anda dized soak ime index (Fig. 9), shows a
signi ican ly dec ease in soak ime om 2001 o
2002. Since 2003 soak ime inc eased s eadily
un il 2007, a a le el o a e age 72 hou pe hauls
and compa able o 2001 le el.
Resea ch Su eys
Resea ch Su eys
T ap su eys ha e been conduc ed in 2 insho e
a eas o Disko Bay since 1997 (See Fig. 5a o
maps).
Impo an : Owing o he b eakdown o he main
engine a he esea ch ship Adol Jensen, he
su ey has been cancelled in 2009. In 2008
su ey was only conduc ed in he No he n pa o
Disko Bay. No new su ey da a is a ailable o he
s ock assessmen and ad ice.
S anda dized CPUE o legal-size males (100mm
CW) in Sou h dec eased subs an ially since 2001
by mo e han 50% om 4.2-1.7 kg/ ap. Subse-
quen ly CPUE s eadily inc ease in 2007 compa -
able wi h he 2001 le el. A decline in CPUE o xx
kg/ ap has been obse ed in 2010 (Fig. 10).
In No h s anda dized CPUE declined om 7.5-2.3
kg/ ap in No h om 2001 o he lowes obse ed
le el in he ime se ies in 2004 (Fig. 10). In 2005
CPUE was s ill conside ably low, bu inc eased o
Snow c ab s ock s a us and ad iso y epo
2011
9
6.4 kg/ ap in 2006 ollowed by a decline in 2007
o 4.4 kg/ ap. F om 2008 o 2010 CPUE ha e
emained s able a app oxima ely 5 kg/ ap.
The mean ca apace wid h (CW) o legal-size
males had con inually declined in bo h su ey
a eas o a minimum in 2004 (Fig. 11). CW subse-
quen ly inc eased in bo h a eas in 2005 and
emaining unchanged in Sou h o 2007, while he
mean CW has inc eased o e he pas 4 yea s in
Disko Bay No h o 116 mm CW in 2008. In 2010
CW d opped o 112 mm CW.
The abundance o adolescen males, 82.2 mm –
100 mm CW (ADO-1) measu ed as numbe pe
ap (NPUE) oscilla e o e he ime se ies in bo h
he No he n and Sou he n pa o Disko Bay (Fig.
12). In Sou h ADO-1 ini ially dec easing om 2002
– 2004 and inc easing o a peak in 2008. In 2010,
a mino decline has been obse ed.
In Disko Bay No h, abundance o ADO-1) peaked
a 2.6/ ap in 2002 (Fig. 12). The NPUE o ADO-1
has since declined sha ply and was a he lowes
le els obse ed o he ime se ies in 2004 and
2007. An addi ional peak was obse ed in 2008
ollowed by a dec ease in 2010 o app ox.
1.5/ ap.
Annual ends in size dis ibu ion o adolescen
and adul males a e shown in Fig. 13. In Sou h
he e was no u he p og ession h ough he size
ange un il 2006. Da a om 2007 implies a ecen
inc ease in ec ui men caused by inc easing
ec ui men o small legal-sized new-shelled since
2005. In 2010 modal was 95mm CW as in 2007,
bu numbe o males > 100 mm was ema kably
lowe in 2007. In he No he n pa o Disko Bay
he ec ui men pulse in 2005, esul ed in
inc easing CPUE and mean CW as legal-sided
adolescen p e- ec ui s mol ed and he
„ ec ui men pulse‟ p og essed h ough he size
ange. The dec ease in ADO-1 males in 2006
showed up clea ly as a educ ion o adul males in
he size ange om 100mm o 130mm CW. In
No h he e was p og ession h ough he size
ange in 2007 and 2008. Da a om 2008 s ongly
implies a ecen inc ease in ec ui men caused by
inc easing ec ui men o small legal-sized new-
shelled since 2006. Fu he mo e in 2008, he
highes p opo ion o adolescen males om 60
mm o app ox. 80 mm CW has been obse ed in
No h (i.e. a mix o ADO2 and ADO3, expec ed o
ec ui o he ishe y wi h in 2 and 3 yea s om
2008). In No h he ec ui men pulse since 2008,
didn‟ esul s in inc easing CPUE in he wo
ollowing yea s. The e is no da a on ec ui men
a ailable om 2009, bu an inc easing modal a
app ox. 100 mm compa ed o 2008, sugges ing
ai ec ui men om 2009 o 2010, which also is
con i med by numbe he o ADO-2, 67.3 – 82.2
mm CW, in 2008. Da a om 2010 show emo als
o males > 120mm CW, sugges ing ha he
ishe y is dependen on males om 100 – 115 mm
CW.
Inc easing p opo ion o legal-size so and new-
shelled males (shell condi ion 1 and 2) ha e been
obse ed om 2001-2006 (Fig. 14) and ha e
peaked a a ound 70% in 2006 in bo h Sou h and
No h. The con inuously high p opo ion o so
and new-shelled males sugges s a con inuous
emo al o he olde shelled males by he ishe y,
which was becoming inc easingly dependen upon
ec ui men in he yea s om 2001 o 2006.
P opo ion o so and new shelled males (shell
condi ion 1 and 2) dec eased in 2008, p obably an
e ec o a subs an ial dec eased in ishe y
emo als in he No he n pa o Disko Bay. In
2010 numbe o so shell males inc eased o
app ox. 55%, as an e ec o incoming new
ec ui men .
The a io o p imipa ous and mul ipa ous emales,
used o suppo ends in ec ui men , dec eased
sha ply in Sou h om 2000 o 2003, emained low
in 2004 and has inc eased un il 2006 and
dec eased again om 2006 o 2007 (Fig. 15). The
inc ease in Sou h in 2005 and 2006 could ei he
Snow c ab s ock s a us and ad iso y epo
2011
16
Recommenda ions o he 2011 ishe y -
O sho e Sisimiu
In 2010 he e is no sign o p og ession in he
biomass and he sign o eco e y has u ned o a
signi ican decline in he biomass and ec ui men .
I is he e o e ecommended o close o sho e
a ea in 2011 and un il he s ock has mo e ully
eco e ed.
Special commen s: Ha es ing should be moni o-
ed using a p ecau iona y app oached, ca e ul
moni o ing o he popula ions esponse o he
ishe y and implemen a ion o e-open / e-closu e
c i e ia.
Managemen a ea: Manii soq-Kangaamiu
The his o ical ca ch, CPUE and e o da a o he
ishe y in Manii soq-Kangaamiu insho e and o -
sho e a eas a e summa ized in Table 2.
O e all ca ches o snow c ab om he ishe y in
Manii soq-Kangaamiu a ea inc eased om 944
ons in 2000 o 1,835 and 1,775 ons in 2001 and
2002, espec i ely, as e o was doubled. Ca -
ches hen dec eased conside ably o 486 ons in
2003 and s eadily dec ease o 130 ons in 2008.
In 2009 ca ches eached 259 ons.
Insho e Manii soq-Kangaamiu
Fishe y
Ca ches in Manii soq-Kangaamiu insho e peaked
in 2001 and 2002 a app ox. 1,000 ons bo h
yea s bu in he subsequen yea s he ishe y
ha e been e y limi ed and in 2009 he ca ch le el
amoun ed o 88 ons. CPUE inc eased wi h
dec easing ca ch and e o (Table 2). No
s anda dized index o CPUE and soak ime has
been p epa ed, owing o he lack o da a and
i egula ly ecu ing ishe y in his a ea.
Ou look - Insho e Manii soq-Kangaamiu
I is no possible o de e mine he biomass o he
esou ce in he a ea, and da a om he ishe y a e
limi ed. The e is no su ey in he insho e a ea and
compa a i e biomass and ec ui men p ospec s
a e unknown.
Recommenda ions o he 2011 ishe y -
Insho e Manii soq-Kangaamiu
Due o he lack o su ey and ishe y da a no
ad ice is gi en o Manii soq-Kangaamiu insho e.
O sho e Manii soq-Kangaamiu
Fishe y
Ca ches in Manii soq-Kangaamiu o sho e peak-
ed in 2001 a a ca ch le el o 826 ons and a
CPUE o 5 kg/ ap. Annual ca ches subsequen ly
declined sha ply o 11 ons in 2005. Con inued
poo s a e o he esou ce, as con i med by da a
om a biological su ey led o he ecommended
and implemen ed closu e o he o sho e a ea in
2005 and again in 2006 o p omo e he eco e y
o he esou ce. In 2007 CPUE has inc eased o
app ox. 10.2 kg/ ap, as well as ca ches and e o
inc eased o 174 ons in 2007. In 2008 he ca ch
dec eased o 111 ons bu inc eased o 171 ons
in 2009. CPUE dec eased om o 9.0 kg/ ap in
2008 o 5.9 kg/ ap in 2009. P elimina y da a o
2010 indica e no ishe y in he o sho e a ea.
No s anda dised index o CPUE o soak ime ha e
been p epa ed, owing o he lack o da a and
i egula ly ecu ing ishe y in his a ea.
Resea ch Su eys
Owing o he b eakdown o he main engine and
con inued echnical p oblems wi h he esea ch
ship Adol Jensen, he su ey has been cancelled
in 2007, 2008 and 2009. In 2010 no new su ey
da a a e a ailable o he s ock assessmen and
ad ice.
Ou look - O sho e Manii soq-Kangaamiu
Fishe y da a is e y spa se and hose a ailable
sugges a dec easing endency since 2007.
Snow c ab s ock s a us and ad iso y epo
2011
17
Recommenda ions o he 2011 ishe y -
O sho e Manii soq-Kangaamiu
No new da a a e a ailable o 2010. Due o he
lack o su ey and ishe y da a no ad ice is gi en
o Manii soq-Kangaamiu o sho e.
Managemen a ea: Nuuk-Paamiu
The his o ical ca ch, CPUE and e o da a o he
ishe y in Nuuk-Paamiu insho e and o sho e
a eas a e summa ized in Table 2.
The Nuuk-Paamiu a ea has been an impo an
ishing a ea whe e o al ca ches peaked a mo e
han 5,000 ons in 2001 (Table 2. And ig. 32). In
he successi e yea s ca ch and e o declined
subs an ially o 512 ons in 2006. O e he pas
wo yea s ca ches ha e been s eadily inc easing
o a le el o 1,111 ons in 2009 (Table 2 and
Fig.32).
Insho e - Nuuk-Paamiu
Fishe y
Ca ches peaked a 4,157 ons in 2001 and hen
declined by mo e han 97% o 111 ons in 2007
(Table 2 and Fig. 33), while ishing e o declined
by 98%. O e he pas wo yea s ca ches and
e o ha e inc eased wi h app ox. 75% o 435
ons in 2009.
F om he s anda dised CPUE index (Fig. 33) i ap-
pea s ha CPUE has g adually inc eased du ing
his pe iod om a low o 1.8 kg/ ap in 2000 o 8.4
kg/ ap in 2006 (F= 23,76, P<0.0001) and emain-
ed somewha s able a app ox. 7kg/ ap om 2007
o 2009. P elimina y CPUE o 2010 indica e a
mino decline o 6 kg/ ap. Du ing he pas 3 yea s
a e age soak ime ha e been declining o om
app ox. 80 o 55 hou pe hauled aps lee (Fig.
34).
Ou look - Insho e Nuuk-Paamiu
The e is no su ey unde aken in Nuuk-Paamiu
insho e hus ec ui men indices and o he biologi-
cal pa ame e s a e no a ailable. The comme cial
CPUE has been somewha s able since 2005 as
o al ca ch and e o ha e emained a a low le el;
less ha 250 ons un il 2008. An inc ease in ca ch
o 435 in 2009 did no esul in educed CPUE
ha yea . Howe e , he e is conce n ega ding
sus ainabili y o he esou ce a such highe ca ch
le els, due o he lack o biological da a.
Recommenda ions o he 2011 ishe y -
Insho e Nuuk-Paamiu
The e had been indica ions o inc ease in he
exploi able biomass o e he las se e al yea s in
a scena io o dec easing comme cial exploi a ion.
I is howe e , di icul o de e mine he ex en o
he imp o emen in he esou ce due o he lack o
o he s ock indices. I is he e o e ecommended
ha a ca ch le el o 200 ons be se o 2011 and
compa able o he app oxima e ca ch le el om
2005 o 2008.
O sho e - Nuuk-Paamiu
Fishe y
The dis ibu ion in he o sho e ishe y has chang-
ed sligh ly om a con inuous dis ibu ion o e o
along he inne edges o he o sho e banks om
he middle o he Nuuk-Paamiu a ea and
no hwa d in 2003 o e o concen a ing a ound
sub-a eas Fiskenæs-Danasdyb and F ede ikshåb-
Ra nsdyb in subsequen yea s (Fig. 32). In 2005 -
2006, e o has also been alloca ed o a ishe y
along he ou e edges o he banks (Fyllas bank)
in he no he n pa o Nuuk-Paamiu .
In 2007 he e we e no landings o c ab om ul imo
June o mid Oc obe 2007 o he main indus y
componen (Royal G eenland) in Paamiu .
Ca ches in Nuuk-Paamiu o sho e declined om
1,339 in 2000 o 761 ons in 2002 (Table 2 and
Fig. 35). Addi ionally, ca ch le el mo e han doub-
led o 1,611 ons in 2003 and u he inc eased o
2,033 ons as e o dec eased o 302 housand
ap hauls in 2005. Since ca ches ha e declined
Snow c ab s ock s a us and ad iso y epo
2011
18
and was in 2008 (418 ons) app ox. 80% o he
2005 le el and e o dec ease by 85%. Howe e ,
ca ches and e o inc ease again wi h 38% (676
ons) and 48% (89 housand) espec i ely.
A s anda dized CPUE index shown g adually
inc ease o a le el o 8.1 kg/ ap in 2005 (Fig. 35),
ollowed by a wo yea s dec ease in CPUE o 5.2
kg/ ap in 2007. In 2008 CPUE inc eased o 7.9
kg/ ap, p obably as an e ec o e y low ishe y
emo als ha yea . In 2009 CPUE emain s able
(7.2 kg/ ap), bu p elimina y and incomple e da a
indica e a d op o 6 kg/ ap in 2010.
In he p e ious yea he ishe y s a s in Janua y
and has he highes ca ch a es om Feb ua y o
May. In 2009 mon hly ends in comme cial da a
gene ally show subs an ial declines in CPUE
du ing he yea , sugges ing he esou ce is being
deple ed as he ishing season p og esses (Fig.
36).
Soak ime has been qui e s able and a ied om
app ox. 60 o 77 hou pe hauled ap lee om
2000 o 2008. A e age soak ime has been
declining in 2009 and 2010 o app ox. 47 hou pe
hauled aps lee (Fig. 36).
Resea ch Su eys
Owing o he b eakdown o he main engine a he
esea ch ship Adol Jensen, he su ey has been
cancelled in 2007, 2008 and 2009. The ap
su ey in o sho e a ea Nuuk – Paamiu has been
success ully sus ained in 2010.
A e a pe iod o e y low su ey CPUE o legal-
size males om 2002-2004, CPUE inc eased om
1.4 o 3.3 kg/ ap in 2006 (Fig. 38). In 2010 CPUE
has d opped wi h 40% o app ox. 2kg/ ap. Owing
o lack o su ey da a p e ious yea s ends in
CPUE is unknown.
The a e age CW o legal-size males declined
om app ox. 120mm CW in 2003 o app ox.
113mm in 2005 (Fig. 39). In 2006 he a e age CW
was sligh ly highe p ima ily due o an inc ease in
CW in he no he n a ea (God håbsdyb). A e age
CW was almos unchanged and 114 mm CW in
2010.
Abundance (NPUE) o adolescen males (ADO-1)
1 yea om a aining legal size inc eased o 0.7
ADO-1/ ap in 2006, a e a pe iod o dec easing
alues o e se e al yea s o app ox. 0.3 ADO-
1/ ap in 2005 (Fig. 40). The inc ease was,
howe e , almos exclusi ely due o a g ea e
abundance o ADO-1 in he sub-a ea Fiskenæs-
Danasdyb. The e is some unce ain y; o wha
ex en abundance o ADO-1/ ap ha e been decli-
ne annually since 2007, bu in 2010 numbe ado-
lescen o en e he ishe y nex yea is educed o
0.3 ADO-1/ ap. Thus, indica ions o imp o ed e-
c ui men in he nea u u e appea o be limi ed
as he abundance o adolescen s is a a low le el
(Fig 40).
Annual size dis ibu ions o male c abs in Nuuk-
Paamiu a ea indica e he e has been some
p og ession o adolescen males in o he legal-
size o he s ock as he wid h o he modal peaks
o adul s ha e ex ended beyond he legal-size (
100mm CW) and ha e g adually h oughou he
yea s un il 2006 become b oade (Fig. 41). In
2006 modal peak eached 105 mm CW whe eas
modal peak was educed o 95mm CW in 2010.
Howe e , some luc ua ion in he size modes
be ween yea s indica e ha he e may be some
a ia ion in he annual ca chabili y o c abs
making i di icul o eliably compa e hese ends
on a empo al scale.
The pe cen age o new-shelled adul c abs de-
c eased conside ably in 2006 (42% SC1+2) in
compa ison o he p e ious yea high (> 60%
SC1+2) in 2005 (Fig. 42). Pe cen age o ha d
shell males wi h high mea con en s (SC3) emain
high (70%) in 2010. Also, low occu ence o new
shelled adul males indica es poo ec ui men o
he s ock.
Snow c ab s ock s a us and ad iso y epo
2011
19
The a io o p imipa ous:mul ipa ous emales in
a eas o Nuuk-Paamiu (Fig. 43), sugges s ha
majo ec ui men o he ishe y is no o hcoming
and he imp o ed ec ui men a he momen
migh g adually dec ease in he coming yea s.
Ou look - O sho e Nuuk-Paamiu
Ca ches and e o inc eased un il 2005, bu
ca ches s eadily declined by 89% o 418 ons in
2008. In 2009 ca ches inc eased by app ox. 40%
o 676 ons while CPUE dec eased om 9.1- 7.6
kg/ ap.
Su e y CPUE o legal-sized c abs and a
ec ui men index bo h showed lowe le els in
2010 when compa ed o su ey indices in 2006.
Due o cancelled su eys om 2007 - 2009, he e
is scan y ishe y-independen da a, o alida e he
exploi able biomass in his a ea.
Recommenda ions o he 2010 ishe y -
O sho e Nuuk-Paamiu
Despi e a signi ican decline in ca ch le el (67%)
and e o om 2005 o 2009, a ailable indices
om logbooks as well as su ey do no indica e
signi ican imp o emen in biomass. Ca ches in
2011 should no exceed 1.000 ons. The
ecommenda ion is 600 ons less compa ed o
2010.
Managemen a ea: Na saq – Qaqo oq
The his o ical ca ch, CPUE and e o da a o he
ishe y in Na saq-Qaqo oq insho e and o sho e
a eas a e summa ized in Table 2.
Fishe y
In 2001 ca ches eached 822 ons and hen
declined o 76 ons in 2005. No logbooks we e
a ailable in ha pe iod, and he e o e he e is no
in o ma ion on e o and CPUE. F om 2006 o
2008 he e was no ishe y in ha managemen
a ea. In 2009 a new indus y was opened and a
small ishe y was in oduced a 187 ons and a
CPUE o 9.2 kg/ ap.
Na saq-Qaqo oq Insho e and O sho e
O e all ca ches in Na saq-Qaqo oq dec eased 6-
old om 822-133 ons om 2001-2003. A ishe y
o 541 ons om landing da a was epo ed o
2004 bu only 34 ons o his was ep esen ed in
logbooks hus gi ing li le in o ma ion on he
his o ic geog aphic dis ibu ion o he ishe y.
F om 2006 o 2008 he e was no ishe y in ha
managemen a ea. In 2009 a new indus y was
opened and a small ishe y was in oduced a 187
ons and a CPUE o 9.2 kg/ ap. P elimina y
ca ches o 2010 indica ing inc easing ca ch le el
and educed CPUE.
The dis ibu ion o he ishe y in 2004 and 2005
sugges ed ha epo ed landings and ca ch
p edomina ely come om insho e. In 2009 and
2010 he geog aphically dis ibu ion o he ishe y
is mainly conduc ed in a limi pa o he en i e
managemen a ea. Da a ob ained om logbooks
shown in Fig. 44, indica e ha he ishe y
occu ing in a es ic ed a ea in he no he n pa
o Julianehåbs Bay, in he adjacen wa e s close
o Sydp oe en and in a limi pa o he jo d
Tese miu close o Nano alik.
Ou look - Insho e Na saq – Qaqo oq
I is di icul o de e mine he biomass o he
esou ce in he a ea, while da a om he ishe y
a e limi ed. The e is no su ey in he insho e a ea
and compa a i e biomass and ec ui men p o-
spec s a e unknown.
Recommenda ions o he 2011 ishe y -
Insho e Na saq – Qaqo oq
I is di icul o de e mine he biomass o he
esou ce in he a ea, while da a om he ishe y
a e limi ed. The e is no su ey in he insho e a ea
Snow c ab s ock s a us and ad iso y epo
2011
20
and biomass and ec ui men p ospec s a e
unknown.
Ou look - O sho e Na saq – Qaqo oq
I is di icul o de e mine he biomass o he
esou ce in he a ea, while da a om he ishe y
a e limi ed. The e is no su ey in he insho e a ea
and biomass and ec ui men p ospec s a e
unknown.
Recommenda ions o he 2011 ishe y -
O sho e Na saq – Qaqo oq
No new da a a e a ailable. Due o he lack o
su ey and ishe y da a no ad ice is gi en o
Na saq – Qaqo oq o sho e.
Snow c ab s ock s a us and ad iso y epo
2011
21
Tables
Table 2. Ca ches, ca ch a es (CPUE) and e o in managemen insho e and o sho e a eas om 2000-
2010. *2010 da a is p elimina y and incomple e.
Managemen A ea Yea
To al
ca ch
( ons)
Quo a
Numbe o
issued
pe mi s
Numbe o
ac i e
essels
Insho e
ca ch
( ons)
Insho e
CPUE
(kg/ ap)
Insho e
e o
('000)
O sho e
ca ch
( ons)
O sho e
CPUE
(kg/ ap)
O sho e
e o
('000)
2000 3,052 -- -- -- 2,940 4.8 613 112 5.5 20
2001 4,202 -- -- -- 3,950 3.1 1,274 252 3.6 70
Uummannaq-Diskobug 2002 3,319 -- -- -- 2,970 3.3 900 349 3.0 116
2003 2,739 -- -- 50 2,482 3.7 679 257 2.6 97
2004 2,341 -- -- 40 2,174 3.4 632 167 3.7 45
2005 1,500 1718 43 31 1,404 3.9 363 96 4.0 24
2006 1,134 1600 43 21 1,008 4.6 221 126 6.7 19
2007 698 1530 39 17 574 4.2 138 123 5.1 24
2008 627 1400 25 8531 5.0 107 96 5.2 19
2009 657 700 22 12 471 5.1 93 186 5.5 34
2010* 217 600 19 5192 5.8 33 25 5.3 5
2000 2,534 -- -- -- 491 2.8 175 2,043 6.4 319
2001 2,602 -- -- -- 327 2.9 113 2,275 4.6 495
Sisimiu 2002 2,724 -- -- -- 473 4.6 103 2,251 3.5 643
2003 1,633 -- -- 34 692 3.7 187 941 3.1 304
2004 1,432 -- -- 19 1,111 3.9 286 321 4.9 65
2005 1,125 900 12 13 891 6.5 137 234 6.4 37
2006 736 750 12 10 725 8.3 87 11 11.1 1
2007 784 850 912 559 7.4 75 225 12.8 18
2008 979 700+300 11 12 765 8.8 87 214 13.1 16
2009 951 500+300 21 20 597 8.4 71 354 7.6 47
2010* 470 800 19 16 220 8.6 26 250 8.3 30
2000 944 -- -- -- 563 4.3 131 381 7.6 50
2001 1,835 -- -- -- 1009 3.7 273 826 5.0 165
Manii soq-Kangaamiu 2002 1,775 -- -- -- 1032 3.8 272 743 2.7 275
2003 485 -- -- 12 40 3.5 12 445 2.8 160
2004 116 -- -- 978 2.4 33 38 2.1 18
2005 73
200 (insho e)
12 662 4.2 15 11 3.6 3
2006 72
100(insho e)'
16 661 4.3 14 11 4.3 3
2007 187 300 11 413 2.9 5 174 10.2 17
2008 130 300 13 819 5.9 3 111 9.0 12
2009 259 250 21 11 88 6.2 14 171 5.9 29
2010* 140 300 18 2140 7.3 19 -- -- --
2000 3,769 -- -- -- 2,430 5.3 458 1,339 5.4 248
2001 5,077 -- -- -- 4,157 5.3 784 920 3.8 242
Nuuk-Paamiu 2002 2,531 -- -- -- 1,770 2.8 632 761 2.8 272
2003 2,315 -- -- 26 704 3.4 207 1,611 4.2 385
2004 1,795 -- -- 22 180 4.5 40 1,615 8.0 203
2005 2,295 -- 26 22 262 8.0 33 2,033 6.7 302
2006 1,173 1,800 24 18 204 7.3 28 969 3.0 328
2007 521 1,600 25 10 111 7.2 15 410 7.4 56
2008 617 1,600 24 6200 7.2 28 418 9.1 46
2009 1,111 700+300 31 13 435 7.5 58 676 7.6 89
2010* 519 1,000 22 9141 7.7 18 378 7.1 53
2000 2 -- -- -- 0 -- -- 2 -- --
2001 822 -- -- -- 822 -- -- 0 -- --
Na saq-Qaqo oq 2002 643 -- -- -- 642 -- -- 1 -- --
2003 133 -- -- 11 123 -- -- 10 -- --
2004 541 -- -- 10 32 3.9 8 2 1.0 2
2005 76 -- 7 6 76 8.3 9 -- -- --
2006 0 -- 3 -- -- -- -- -- -- --
2007 0 -- 4 -- -- -- -- -- -- --
2008 -- -- -- -- -- -- -- -- -- --
2009 187 ?12 5187 9.2 20 -- -- --
2010* 273 300+150 15 6266 7.9 34 9 8.7 1
Snow c ab s ock s a us and ad iso y epo
2011
22
Figu es
Fig 1. Map o Wes G eenland ou lining he 6 managemen a eas o he snow c ab ishe y.
Snow c ab s ock s a us and ad iso y epo
2011
23
Figu e 2. To al ca ch and quo a size om 1995-2010. Da a om 2010 is only p elimina y and imcomple e.
Fig. 3. Snow c ab landings in he 4 mos impo an managemen a eas o Wes G eenland 2000-2010 and
used o al e o . Da a o 2010 a e p elimina y and incomple e.
Å
1994 1996 1998 2000 2002 2004 2006 2008 2010
To al angs og k o e ('000 ons)
0
5
10
15
20
25
30
35
To al quo a
To al ca ch
Yea
2000 2002 2004 2006 2008 2010
To al ca ch ( ons)
0
2000
4000
6000
8000
10000
12000
14000
16000
E o ('000)
0
500
1000
1500
2000
2500
3000
3500
4000
Disko-Uummannaq
Sisimiu
Manii soq-Kangaamiu
Nuuk-Paamiu
Na saq-Kap a el
E o
Snow c ab s ock s a us and ad iso y epo
2011
24
Fig. 4. Dis ibu ion o he c ab ishe y o Wes G eenland wi hin each managemen a ea om 2003 - 2010,
de i ed om logbook da a. Lines a e used o sepa a e managemen a eas.
2003
2004
2005
2006
2007
2008
2009
2010
Snow c ab s ock s a us and ad iso y epo
2011
25
LL
LG
LH
LJ
LK
LS
LM
LN
LP
LR
LA
LB
LD
LE
LF
13 14 1715 16 18 19 24
20 21 22 23 29
25 26 27 28 3430 31 32 33
Qeqe a suaq
Aasiaa
Qasigianngui
Ilulissa
61 62 63
6465
66 67
68
69
70
71
72
73 74
76
77
79
80
81
82
83
84
85
86 87
88
89 90
91
92
93
94
95
96
98
99
175
176
177
178
KF
KG
KH
KJ
14
KA
KB
KD
KE
13 1815 16 17 19 20 21 22
Sisimiu
51 52 54 55 58 60
25
26
27 28
29
32
33
34
17
18 19 20 21
1
2
3
4
5
6
7
8
9
10
11
12
35
42
44 45
46
47 48
49
50
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
Fig. 5a. Map showing he loca ion o su ey s a ions in Disko Bay, A ea 1 (No h) and A ea 2 (Sou h).
Fig. 5b. Map showing he loca ion o insho e and o sho e su ey s a ions in Sisimiu .
Snow c ab s ock s a us and ad iso y epo
2011
32
Disko Bay - Sou h
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Adolescen males
Adul males
2000
2001
2002
Disko Bay - No h
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Adolescen males
Adul males
2000
2001
2002
Snow c ab s ock s a us and ad iso y epo
2011
33
Disko Bay - Sou h
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Adolescen males
Adul males
Disko Bay - No h
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Adolescen males
Adul males
2003
2004
2005
2003
2004
2005
Snow c ab s ock s a us and ad iso y epo
2011
34
Disko Bay - Sou h
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Disko Bay - No h
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
Adolescen males
Adul males
2006
2007
2006
2007
2008
Snow c ab s ock s a us and ad iso y epo
2011
35
Fig. 13. Size dis ibu ion o adolescen and adul males om su ey Disko Bay Sou h and Disko Bay No h in
Disko Bay om 2000-2010.
Fig. 14. The pe cen age o shell condi ions (1-5) o adul legal-sized male c abs (100mm CW) sampled in
Disko Bay Sou h and Disko Bay No h, Disko Bay 1998 o 2010.
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.5
1.0
1.5
2.0
2.5
Adolescen males
Adul males
2010
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Adundance (NPUE)
0.0
0.5
1.0
1.5
2.0
2.5
Adolescen males
Adul males
2010
Disko Bay - Sou h
Yea
1998 2000 2002 2004 2006 2008 2010
Pe cen (%)
0
20
40
60
80
100
Disko Bug - No h
Yea
1998 2000 2002 2004 2006 2008 2010
Pe cen (%)
0
20
40
60
80
100
SC1
SC2
SC3
SC4
SC5
Snow c ab s ock s a us and ad iso y epo
2011
36
Fig. 15. Annual ends in he a io be ween p imipa ous and mul ipa ous in Disko Bay Sou h and Disko Bay
No h, Disko Bay 2000-2010.
Disko Bay - No h
Yea
1998 2000 2002 2004 2006 2008 2010
P imipa ous emale : (p imipa ous + mul ipa ous)
0.0
0.2
0.4
0.6
0.8
1.0
Disko Bay - Sou h
Yea
1998 2000 2002 2004 2006 2008 2010
P imipa ous emale : (p imipa ous + mul ipa ous)
0.0
0.2
0.4
0.6
0.8
1.0
Snow c ab s ock s a us and ad iso y epo
2011
37
Fig. 16. The dis ibu ion and c ab ishe y in Sisimiu insho e and o sho e in 2003 - 2010. The coas al line
indica es he basis- line sepa a ing he o sho e om he insho e. Da a om 2010 is p elimina y and
incomple e.
2003
2004
2005
2006
2007
2008
2009
2010
Snow c ab s ock s a us and ad iso y epo
2011
38
Sisimiu insho e
Mon h
2 4 6 8 10 12 14
CPUE (kg pe ap)
0
5
10
15
20
25
2007
2008
2009
2010
Fig. 17. Mon hly ends in CPUE (kg pe ap) om he ishe y in Sisimiu insho e om 20073 o 2010. Da a
o 2010 is incomple e.
Insho e Sisimiu
Yea
2000 2002 2004 2006 2008 2010
CPUE (kg/ ap)
0
2
4
6
8
10
12
To al ca ch ( ons)
0
1000
2000
3000
4000
CPUE (kg/ ap)
Uppe con idence limi
Lowe con idense limi
Fig. 18. S anda dised CPUE index and o al ca ch based on logbook in o ma ion insho e Sisimiu om 2000-
2010. Da a o 2010 is incomple e.
Snow c ab s ock s a us and ad iso y epo
2011
39
Insho e Sisimiu
Yea
2000 2002 2004 2006 2008 2010
GLM index soake ime (hou )
0
20
40
60
80
100
120
Fig. 19. S anda dised soak ime index based on logbook in o ma ion insho e Sisimiu om 2000-2010. Da a
o 2010 is incomple e.
Sisimiu insho e
Yea
1996 1998 2000 2002 2004 2006 2008 2010
GLM indexCPUE (kg pe ap)
0
5
10
15
20
CPUE
CPUE closu e/ e-opening le el
Fig. 20. Annual ends in CPUE (kg/ ap S.E.) o legal-size males (100mm CW) om ap su eys in Sisi-
miu insho e om 1997 o 2010. The e-opening/closu e c i e ia in Sisimiu insho e a e indica ed wi h a line.
Snow c ab s ock s a us and ad iso y epo
2011
40
Yea
1998 2000 2002 2004 2006 2008 2010
A e age ca apace wid h (mm)
110
112
114
116
118
120
Sisimiu insho e
Sisimiu o sho e
Sisimiu - Nd . S øm jo d
Sisimiu insho e - CW in he e e ence pe iod 1
Sisimiu o sho e - CW in he e e ence pe iod
Fig. 21. Annual ends in he mean ca apace wid h (CW) o legal-size males (100mm CW) om ap
su eys in Sisimiu insho e (1997-2010) and Sisimiu o sho e (1999–2010). The mean CW o he e e ence
pe iod (1999-2002) in Sisimiu insho e and (2000–2003) in Sisimiu o sho e is indica ed wi h a line.
Yea
2000 2002 2004 2006 2008 2010
Abundance (NPUE)
0
1
2
3
4
5
6
7
8
ADO1: 82.2 - 100 mm CW
NPUE o ADO-1 closu e/ e-opening le el
Snow c ab s ock s a us and ad iso y epo
2011
41
Fig. 22. Annual ends in he abundance NPUE (No. c abs pe ap S.E) o adolescen males (ADO-1: 82.2-
100mm CW) expec ed o ec ui o he ishe y he ollowing yea in Sisimiu insho e a eas om 2000 o 2010.
The e-opening/closu e c i e ia in Sisimiu insho e a e indica ed wi h a line.
Sisimiu insho e
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Adundance (NPUE)
0
1
2
3
4
5
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (mm)
0
1
2
3
4
5
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (mm)
0
1
2
3
4
5
Adolescen males
Adul males
Sisimiu o sho e
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0
1
2
3
4
5
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0
1
2
3
4
5
Ca apace widh (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0
1
2
3
4
5
Adolescen males
Adul males
2000
2001
2002
2000
2001
2002
Snow c ab s ock s a us and ad iso y epo
2011
48
Yea
2000 2002 2004 2006 2008 2010
Abundance (NPUE)
0
2
4
6
8
ADO1: 82.2 - 100 mm CW
NPUE o ADO-1 closu e/ e-opening le el
Fig. 30. Annual ends in he abundance NPUE (No. c abs pe ap S.E) o adolescen males (ADO-1: 82.2-
100mm CW) expec ed o ec ui o he ishe y he ollowing yea in Sisimiu o sho e a eas om 2000 o
2010. The e-opening/closu e c i e ia in Sisimiu o sho e a e indica ed wi h a line.
Yea
2000 2002 2004 2006 2008 2010
P imipa ous: (P imipa ous + Mul ipa ous) emale
0.0
0.2
0.4
0.6
0.8
1.0
Fig. 31. Annual ends in he a io be ween p imipa ous and mul ipa ous emales in Sisimiu o sho e om
2000 o 2010.
Snow c ab s ock s a us and ad iso y epo
2011
49
Fig. 32. The dis ibu ion and c ab ishe y in Nuuk - Paamiu insho e and o sho e in 2003 - 2010. The coas al
line indica es he basis- line sepa a ing he o sho e om he insho e. Da a om 2010 is p elimina y and
incomple e.
2003
2004
2005
2006
2007
2008
2009
2010
Snow c ab s ock s a us and ad iso y epo
2011
50
Insho e Nuuk - Paamiu
Yea
2000 2002 2004 2006 2008 2010
CPUE (kg/ ap)
0
2
4
6
8
10
12
To al ca ch ( ons)
0
1000
2000
3000
4000
CPUE (kg/ ap)
Lowe con idence limi s
Uppe con idence limi s
To al ca ch
Fig. 33. S anda dised CPUE index and o al ca ch based on logbook in o ma ion insho e Nuuk - Paamiu
om 1999-2010. Da a o 2010 is incomple e.
Insho e Nuuk - Paamiu
Yea
2000 2002 2004 2006 2008 2010
GLM index soake ime (hou )
0
20
40
60
80
100
120
lsmeans ish ime
Uppe con idence limi s
Lowe cond idence limi s
Fig. 34. S anda dised soak ime index based on logbook in o ma ion insho e Nuuk - Paamiu om 1999-
2010. Da a o 2010 is incomple e.
Snow c ab s ock s a us and ad iso y epo
2011
51
O sho e Nuuk - Paamiu
Yea
2000 2002 2004 2006 2008 2010
CPUE (kg/ ap)
0
2
4
6
8
10
12
To al ca ch ( ons)
0
1000
2000
3000
4000
CPUE (kg/ ap)
Lowe con idence limi s
Uppe con idence limi s
To al ca ch
Fig. 35. S anda dised CPUE index and o al ca ch based on logbook in o ma ion o sho e Nuuk - Paamiu
om 1999-2010. Da a o 2010 is incomple e.
Mon h
0 2 4 6 8 10 12 14
CPUE (kg pe ap)
0
2
4
6
8
10
12
14
2007
2008
2009
2010
Fig. 36. Mon hly ends in CPUE (kg pe ap) om he ishe y in Nuuk-Paamiu o sho e om 2003 o 2010.
Da a o 2010 is incomple e.
Snow c ab s ock s a us and ad iso y epo
2011
52
O sho e Nuuk - Paamiu
Yea
2000 2002 2004 2006 2008 2010
GLM index soake ime (hou )
0
20
40
60
80
100
120
lsmeans ish ime
Lo e con icence limi s
Uppe con idence limi s
Fig. 37. S anda dised soak ime index based on logbook in o ma ion o sho e Nuuk - Paamiu om 1999-
2010. Da a o 2010 is incomple e.
Yea
2000 2002 2004 2006 2008 2010
CPUE (kg pe ap)
0
1
2
3
4
Fig. 38. Annual ends in he CPUE (kg/ ap S.E.) o legal-size males ( 100mm CW) om he o sho e
ap su eys in Nuuk-Paamiu 2002-2010.
Snow c ab s ock s a us and ad iso y epo
2011
53
Yea
2000 2002 2004 2006 2008 2010 2012
A e age ca apace wi dh (mm)
112
114
116
118
120
122
124
126
Fig. 39. Annual ends in he mean ca apace wid h (mm.) o legal-size males (100mm CW) om o sho e
ap su eys in Nuuk-Paamiu 2002-2010.
Nuuk - Paamiu o sho e
Yea
2000 2002 2004 2006 2008 2010 2012
Abundance (NPUE)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
ADO-1: 82.2 - 100 mm CW
Fig. 40. Annual ends in he NPUE (No. o c abs pe ap S.E.) o adolescen males (ADO-1 (82.2-100mm
CW expec ed o ec ui o he ishe y in 1 yea s in Nuuk-Paamiu om 2002-2010.
Snow c ab s ock s a us and ad iso y epo
2011
54
Nuuk Paamiu o sho e
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Adundance NPUE
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Adolenscen males
Adul males
Nuuk Paamiu o sho e
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Adolescen males
Adul males
2001 2004
2002 2005
20062003
Snow c ab s ock s a us and ad iso y epo
2011
55
Fig. 41. Size dis ibu ion o adolescen and adul male snow c abs om 2002-2006 de i ed om su ey da a
om he Nuuk-Paamiu managemen a ea.
SC1 - So new shell, low mea con en s
SC2 - Ha d new shell, low mea con en s
SC3 - Ha d shell, high mea con en s
SC4 - Old ha d shell, high mea con en s
SC5 - Ve y old shell, g a e ya d c abs
Fig. 42. The equency (%) o shell condi ion (1-5) o legal-size adul males ( 100mm CW) om 2002-2010
in Nuuk-Paamiu o sho e.
Nuuk - Paamiu o sho e
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Adolescen males
Adul males
2010
Yea
2000 2002 2004 2006 2008 2010
Pe cen (%)
0
20
40
60
80
100
Snow c ab s ock s a us and ad iso y epo
2011
56
Yea
2000 2002 2004 2006 2008 2010
P imipa ous: (P imipa ous + Mul ipa ous) emale
0.0
0.2
0.4
0.6
0.8
1.0
Fig. 43. The a io be ween p imipa ous and mul ipa ous emales om o sho e ap su eys Nuuk – Paamiu
o sho e 2001 – 2010.
Fig. 44. The dis ibu ion and c ab ishe y in Na saq – Kap a el insho e and o sho e in 2009 - 2010. The
coas al line indica es he basis- line sepa a ing he o sho e om he insho e. Da a om 2010 is p elimina y
and incomple e.
2009
2010
Snow c ab s ock s a us and ad iso y epo
2011
57
Mon h
0 2 4 6 8 10 12 14
CPUE (kg pe ap)
4
6
8
10
12
14
2009
2010
Fig. 45. Mon hly ends in CPUE (kg pe ap) om he ishe y in Na saq – Kap a el indho e om 2009 o
2010. Da a o 2010 is incomple e.
