By
An Assessmen and ad ise o snow
c ab in wes G eenland 2010
nDo e Bu meis e a Helle Siegs ad
By
AnnDo e Bu meis e
TEKNISK RAPPORT NR. 80, 2009
Snow c ab s ock s a us and ad iso y epo
2010
2
Ti el: Assessmen and ad ice o Snow C ab in Wes G eenland 2009
Fo a e (e): AnnDo e Bu meis e
Se ie i el og numme : Teknisk appo n . 80
Udgi e : Pinngo i ale i ik, G ønlands Na u ins i u
Udgi elses idspunk : No embe 2009
K ali e ssik ing: Ea l Dawe, Depa men o Fishe y and Science, New oundland,
Canada
O e sæ else:
Finansie ing:
Fo side o o: AnnDo e Bu meis e
ISBN: 87-91214-44-0
ISSN: 1397-3657
Bedes ci e e : Bu meis e , AD. 2009. Asessmen o snow c ab in Wes G eenland
2009 Teknisk Rappo n .80, 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
2010
3
Assessmen and ad ice o Snow C ab in Wes G eenland 2010
AnnDo e Bu meis e , Pinngo i ale i ik, G eenland Ins i u e o Na u al Resou ces. Box 570, 3900 Nuuk. G eenland. Phone: +299
361200. E-mail: anbu@na u .gl.
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 2010 in Disko Bay insho e is 600 ons. 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 .
No su ey has been conduc ed in Disko Bay 2009 owing o echnical p oblems wi h / Adol Jensen.
Managemen a ea Sisimiu
The ecommended ca ch le el o 2010 in Sisimiu insho e is 500 ons, di ided on 300 ons in he
adi ionally ishing a ea and 200 ons in Nd . Iso oq and Nd . S oem jo d.
Fishe y and su ey CPUE index as well as abundance index o ec ui s based on su ey da a
d opped om 2008 o 2009, bu emain high and a e s ill abo e he se ies a e age based on
a ailable obse a ions. I his d op and i con inues in 2010 he comme cial biomass migh dec ease
migh dec ease o e he nex ew yea s.
The ecommended ca ch le el o 2009 in Sisimiu o sho e is 200 ons. In 2009 he e is no sign o
p og ession in he biomass and he p e ious yea sign o eco e y has u ned in o a decline in he
biomass and ec ui men .
Su ey and ishe y da a indica e signs o eco e y in 2007 and 2008. The inc ease in biomass was
la gely a ibu able o g ea ly educed emo als due o he la ge educ ions in comme cial ca ches,
om 2004 up o 2007. Ne e heless, all a ailable indexes show a signi ican d op om 2008 o 2009.
Snow c ab s ock s a us and ad iso y epo
2010
4
Rec ui men indices o he o sho e a ea a e poo and indica e low ec ui men p ospec s in he
sho e m. Cau ion mus be exe cised as CPUE om he ishe y and su ey declining and he
ec ui men is a a e y low le el. Those esul s migh be e ec s o inc eased emo als by he ishe y
a e he e-opening and sugges ing ha he biomass is/was no eco e ed.
I should be emphasized ha e-opening o he ishe y in 2007 was sus ained be o e he e-opening
c i e ia was me .
Managemen a ea Nuuk - Paamiu
The ecommended ca ch le el o 2010 in Nuuk – Paamiu insho e is 200 ons.
The ecommended ca ch le el o 2009 in Nuuk - Paamiu o sho e is 1,600 ons, and unchanged
om 2008.
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.
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 2010 a e gi en in Table 1.
Snow c ab s ock s a us and ad iso y epo
2010
5
Table 1. Summa y o ca ch ecommenda ions o he c ab ishe y in 2010 om he G eenland Ins i u e o Na u al
Resou ces and o al ca ch om 2008 (ca ch s a is ics o 2009 a e incomple e a his ime).
Recommended
ca ch Insho e 2010
in ons
Recommended
ca ch O sho e
2010 in ons
Ca ch in ons
2008 Insho e
Ca ch in ons
2008 O sho e
Disko Bug 600 130 531 96
Sisimiu 500 200 765 214
Manii soq No ad ice No ad ice 19 111
Nuuk-Paamiu 200 1,600 200 418
Recommended ca ch in all 1,300 1,930 1,515 839
Snow c ab s ock s a us and ad iso y epo
2010
6
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
2010
7
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 2,354 ons
(Quo a 4,200 ons) in 2008 and p elimina y da a
indica e an addi ional inc ease in landings in 2009
(2,412 ons ul imo Sep embe 2009, Quo a 4,225
ons). The a io o o al landings o logbooks
landing a ies be ween managemen a eas.
As well as in 2008, 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 in-
c 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 2009 shows o al e o is
353 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
2010
8
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
2010
9
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 2009 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 627 ons (85% insho e) in 2008, ap-
p oxima ely 15% o he 2001 ca ch.
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 d” and “Disko Syd”. 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 p elimina y da a indica e a e y limi
ishe y in he a ea “Disko No d”.
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 2003 when he ishe y peaked in Ma ch
and May. Ea ly season ca ch a es (Ap il-May
gene ally dec eased o e ome (2004-2008),
pe haps because ea ly season ocused on
adi ional a eas. La e season CPUE inc eased
om 2004-2006, e lec ing alloca ion o e o o
new a eas as he season p og essed. In 2006 he
ishe y peaked in Sep embe , mainly due o a
closu e du ing July and Augus (Fig. 7). In 2008
CPUE we e highe ha compa es o p e ious
yea s, bu declined o 2007 le el om Oc obe o
Decembe .
A s anda dised CPUE index (Fig. 8), show a
signi ican d opped in CPUE om 2001 o 2003
om app ox. 7.7 kg/ ap o 3.8 kg/ ap (F= 78.60,
P < 0.0001). In he ollowing yea s CPUE has e-
mained low a a s able le el. Da a om 2008 and
p elimina y da a o 2009 indica e inc easing
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
(613-1274 housand ap hauls, Table 2). Ca ches
and e o ha e s eadily dec eased since 2001 by
app ox. 86% o 531 ons and 107 housand ap
hauls, espec i ely, in 2008 (Table 2 and Fig. 8).
S anda dised 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
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.
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), despi e in 2008 whe e only he suba ea
No h, we e in es iga ed. CPUE o legal-size
males (100mm CW) in Sou h and No h peaked
in 2001 and 2000 espec i ely and ha e declined
s eadily by mo e han 50% o 2004; om 4.2-1.7
kg/ ap in Sou h and 7.5-2.3 kg/ ap in No h (Fig.
10). The 2004 CPUE was he lowes obse ed in
he ime se ies. In 2005 and 2006 CPUE in Sou h
was s ill conside ably below he e e ence mean
o 3.7, bu inc eased o 4 kg/ ap, ma ginally
abo e he e e ence mean, in 2007. In No h,
CPUE inc eased om 2.3 o 6.4 kg/ ap and has
Snow c ab s ock s a us and ad iso y epo
2010
16
ca ches in ha pe iod (Table 2). The subsequen
inc ease in pe cen new-shelled males in 2009,
howe e , may ha e been due o inc easing
ec ui men in o he s ock, as ADO-1 had
inc eased in 2005 o 2008. Howe e , i is unclea
o wha ex en he changes in shell condi ion
a ios and CPUE a e due o educed ca ch e sus
inc eased ec ui men . In gene al he inc eased
pe cen age o old-shelled males and inc easing
CPUE a e bo h posi i e signs o he s ock
indica ing an inc eased abundance o olde
shelled males ha a e a ailable o pa icipa e in
ep oduc ion.
The a io o p imipa ous: o al ma u e emales
declined sha ply om 2000-2002, hen inc eased
om 2003 o 2005 (Fig. 31). A signi ican d op in
his a io occu ed in 2006 and con inued in 2008,
wi h a mino inc ease in 2009 indica ing poo
ec ui men may be o hcoming in he u u e.
Ou look - O sho e Sisimiu
Su ey and ishe y da a indica e signs o eco e y
in 2007 and 2008. The inc ease in biomass was
la gely a ibu able o g ea ly educed emo als
due o he la ge educ ions in comme cial ca ches,
om 2004 up o 2007. Ne e heless, all a ailable
indexes show a signi ican d op om 2008 o
2009. Rec ui men indices o he o sho e a ea
a e poo and indica e low ec ui men p ospec s in
he sho e m. Cau ion mus be exe cised as
CPUE om he ishe y and su ey declining and
he ec ui men is a a e y low le el. Those
esul s migh be e ec s o inc eased emo als by
he ishe y a e he e-opening and sugges ing
ha he biomass is/was no eco e ed.
Fu he mo e, i appea s ha he biomass ished
upon a e e-opening in 2007 may no be able o
suppo ca ches as la ge as hose landed in 2007-
2008. I is qui e possible ha he biomass will no
eco e o he same high le els as exis ed ini ially.
Fo unknown easons, (eg. Ocean clima e
change) obse a ions om New oundland shows
c ab p oduc i i y may ne e be as high as i once
was (pe s. Comm., Ea l Dawe, DFO, S . John‟s,
New oundland, Canada).
I should be emphasized ha e-opening o he
ishe y in 2007 was sus ained be o e he e-
opening c i e ia was me .
Recommenda ions o he 2010 ishe y -
O sho e Sisimiu
In 2009 he e is no sign o p og ession in he
biomass and he p e ious yea sign o eco e y is
u ned o a decline in he biomass and ec ui -
men .
I is he e o e ecommended o educe he TAC o
200 ons in he en i e o sho e a ea in 2010.
Special commen s: Ha es ing should be moni o-
ed using a p ecau iona y app oached, elayed on
app oach o changes in ca ch le els, ca e ul
moni o ing o he popula ion 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 115 ons in 2004 as he CPUE bo h
insho e and o sho e dec eased o he lowes
le els obse ed in he ishe y (2.4 and 2.1 kg/ ap
in o sho e and insho e a eas). Since 2003 he
insho e ishe y has been less han 100 ons and
om 2005 he o sho e ishe y has been closed,
bu was eopened in Augus 2007.
Insho e Manii soq-Kangaamiu
Snow c ab s ock s a us and ad iso y epo
2010
17
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 and in 2009 ca ch le el
amoun 22 ons. CPUE emained low a 3.1
kg/ ap despi e la ge dec ease in ca ches and
e o (Table 2) and Fig. No s anda dised index o
CPUE and soak ime has been p epa ed, owing o
he lack o da a and un- egula ly ecu ing ishe y
in his a ea.
Ou look - Insho e Manii soq-Kangaamiu
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 2009 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 wi h a ca ch le el o 826 ons and a
CPUE o 5 kg/ ap. A signi ican declined in
ca ches o 445 ons was obse ed. Despi e in
ca ch and used e o CPUE emained low a 2.1
kg/ ap in 2004, indica ing he esou ce was s ill in
a s a e o decline.
Con inued poo s a e o he esou ce biomass and
con i ming 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 ca ch le el declined o
111 ons and CPUE o 9.0 kg/ ap. P elimina y
ca ch o 2009 indica e an inc ease in ca ch le el
and declining ca ch a e.
No s anda dised index o CPUE and soak ime
has been p epa ed, owing o he lack o da a and
un- 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 a he esea ch ship
Adol Jensen, he su ey has been cancelled in
2007, 2008 and 2008. No new su ey da a is
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 an dec easing endency since 2007.
Recommenda ions o he 2010 ishe y -
O sho e Manii soq-Kangaamiu
No new da a a e a ailable o 2009. 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.). Howe e ,
ca ches he ollowing yea we e app oxima ely
50% lowe (2,531 ons) despi e only a 10%
dec ease in e o . This led o he ishe y CPUE
insho e and o sho e dec eased om 5.3 and 3.8
kg/ ap espec i ely in 2001 o 2.8 kg/ ap in 2002
in bo h a eas. To al ca ches including insho e and
o sho e we e somewha s able a ound 2,300 ons
du ing 2002-2005, pa ly as a esul o low o e all
e o and mo e ecen ly due o quo a es ic ions.
To al ca ches dec eased by 77% o 521 ons in
2007 (410 ons o sho e and 111 ons insho e).
O e he pas wo yea s ca ches ha e been
Snow c ab s ock s a us and ad iso y epo
2010
18
s eadily inc easing o a p elimina y le el o 743
ons in 2009 (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%. The ca ch le el inc eased o 200 ons in
2008 and p elimina y da a show 216 ons in 2009.
The dis ibu ion he ishe y in 2004 and 2008 has
been concen a ed nea he sub-a eas Fiskenæs-
Danasdyb and F ede ikshåb-Ra nsdyb. The e is,
howe e some ishe y in he no he n pa o he
a ea – God håb (Fig. 32).
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 7.7
kg/ ap in 2006 (F= 30.4, P<0.001) and emained
somewha s able. In 2008 a e age soak ime was
app ox. 80 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 ha e been somewha s able since 2005 as
o al ca ch and e o emain a a low le el. The e
is conce n ega ding sus ainabili y o he esou ce
a highe ca ch le els, due o he lack o biological
da a.
Recommenda ions o he 2010 ishe y -
Insho e Nuuk-Paamiu
The e had been indica ions o imp o emen o he
esou ce biomass o e he las se e al yea s in a
scena io o dec easing ishing exploi a ion. I is
howe e , di icul o de e mine he ex en o he
imp o emen due o he lack o o he s ock
indices. I is he e o e ecommended ha he
ca ch le el o 200 ons o 2010 and compa able
wi h he comme cial ca ch le el since 2005.
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 2004 and 2009 (Fig. 32). In 2005 and
2006 and 2009, e o has 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). Ca ch le el mo e han doubled 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 and was in
2008 (418 ons) app ox. 80% o he 2005 le el
and e o dec ease by 85%.
A s anda dised 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. Da a
om 2008 and p elimina y da a o 2009 indica ed
some s abili y o CPUE a 7.9 kg/ ap and 7.4
kg/ ap espec i ely.
The ishe y s a s in Janua y and has he highes
ca ch a es om Feb ua y o May. 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 in 2009 is 59
hou pe hauled aps lee (Fig. 36).
Snow c ab s ock s a us and ad iso y epo
2010
19
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. No new su ey
da a is a ailable o he s ock assessmen and
ad ice.
Ou look - O sho e Nuuk-Paamiu
Owing o cancelled su eys, he e is no ishe y-
independen da a, o alida e he appa en inc ea-
se in he exploi able biomass in his a ea. I is
unce ain i he e is a p og ession in biomass o
he inc easing ca ch a es is a esul om a lack o
in e es o comme cial snow c ab ishe y in he
managemen a ea in 2007 and 2008.
Recommenda ions o he 2010 ishe y -
O sho e Nuuk-Paamiu
No new biological da a has been a ailable since
2006. I is ecommended ha he ca ch le el o
2010 does no exceed 1600 ons, iden ical wi h
he quo a o 2008 and 2009.
Snow c ab s ock s a us and ad iso y epo
2010
20
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-
2009. *2009 da a is p elimina y and incomple e.
Managemen A ea Yea
To al
ca ch
( ons)
Quo a
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 -- 2,482 3.7 679 257 2.6 97
2004 2,341 -- 2,174 3.4 632 167 3.7 45
2005 1,500 1718 1,404 3.9 363 96 4.0 24
2006 1,134 1600 1,008 4.6 221 126 6.7 19
2007 698 1530 574 4.2 138 123 5.1 24
2008 627 1400 531 5.0 107 96 5.2 19
2009* 439 700 264 5.5 48 174 5.5 32
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 -- 692 3.7 187 941 3.1 304
2004 1,432 -- 1,111 3.9 286 321 4.9 65
2005 1,125 900 891 6.5 137 234 6.4 37
2006 736 750 725 8.3 87 11 11.1 1
2007 784 850 559 7.4 75 225 12.8 18
2008 979 700+300 765 8.8 87 214 13.1 16
2009* 867 500+300 560 8.6 65 308 8.3 37
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 -- 40 3.5 12 445 2.8 160
2004 116 -- 78 2.4 33 38 2.1 18
2005 73
200 (insho e)
62 4.2 15 11 3.6 3
2006 72
100(insho e)'
61 4.3 14 11 4.3 3
2007 187 300 13 2.9 5 174 10.2 17
2008 130 300 19 5.9 3 111 9.0 12
2009* 185 -- 22 3.1 7 163 6.0 27
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 -- 704 3.4 207 1,611 4.2 385
2004 1,795 -- 180 4.5 40 1,615 8.0 203
2005 2,295 -- 262 8.0 33 2,033 6.7 302
2006 1,173 1,800 204 7.3 28 969 3.0 328
2007 521 1,600 111 7.2 15 410 7.4 56
2008 617 1600 200 7.2 28 418 9.1 46
2009* 743 700+300 216 7.7 28 527 8.6 62
2000 2 -- 0 -- -- 2 -- --
2001 822 -- 822 -- -- 0 -- --
Na saq-Qaqo oq 2002 643 -- 642 -- -- 1 -- --
2003 133 -- 123 -- -- 10 -- --
2004 541 -- 32 3.9 8 2 1.0 2
2005 76 -- 76 8.3 9 -- -- --
2006 0 -- -- -- -- -- -- --
2007 0 -- -- -- -- -- -- --
2008 -- -- -- -- -- -- -- --
2009* 125 -- -- -- -- -- -- --
Snow c ab s ock s a us and ad iso y epo
2010
21
Figu es
Fig 1. Map o Wes G eenland ou lining he 6 managemen a eas as o 2004 o he snow c ab ishe y.
Snow c ab s ock s a us and ad iso y epo
2010
22
Figu e 2. To al ca ch and quo a size om 1995-2009. Da a om 2009 is only p elimina y.
Fig. 3. Snow c ab landings in he 4 mos impo an managemen a eas o Wes G eenland 2000-2009 and
used o al e o . Da a o 2009 a e p elimina y and incomple e.
Yea
1994 1996 1998 2000 2002 2004 2006 2008 2010
To al quo a and ca ch ('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
To al e o ('000)
0
1000
2000
3000
4000
Disko Bay - Uummannaq
Sisimiu
Manii soq - Kangaamiu
Nuuk - Paamiu
To al e o
Snow c ab s ock s a us and ad iso y epo
2010
23
Fig. 4. Dis ibu ion o he c ab ishe y o Wes G eenland wi hin each managemen a ea om 2003 - 2009,
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
Snow c ab s ock s a us and ad iso y epo
2010
24
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
2010
25
Manii soq-Kangaamiu
Fiskenæs-Danasdyb
God håb
Nuuk-Paamiu
F ede ikshåb-Ra nsdyb
L
J
M
I
H
K
NUUK
G
C
D
E
F
A
B
NUUK
O sho e Su ey A eas
Manii soq-Kangaamiu
Nuuk-Paamiu
0
0
Fig. 5c. Map showing he loca ion o su ey s a ions om Manii soq-Kangaamiu and Nuuk-Paamiu (and
sub-a eas).
Snow c ab s ock s a us and ad iso y epo
2010
32
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 2000-2008.
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
2010
33
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 2008.
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 2000-2008.
Disko Bay - Sou h
Yea
1998 2000 2002 2004 2006 2008
Pe cen (%)
0
20
40
60
80
100
Disko Bug - No h
Yea
1998 2000 2002 2004 2006 2008
Pe cen (%)
0
20
40
60
80
100
SC1
SC2
SC3
SC4
SC5
Disko Bay - No h
Yea
1998 2000 2002 2004 2006 2008
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
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
2010
34
Fig. 16. The dis ibu ion and c ab ishe y in Sisimiu insho e and o sho e in 2003 - 2009. The coas al line
indica es he basis- line sepa a ing he o sho e om he insho e. Da a om 2009 is p elimina y and
incomple e.
2003
2004
2003
2005
2006
2007
2008
2008
2009
Snow c ab s ock s a us and ad iso y epo
2010
35
Insho e Sisimiu
Mon h
0 2 4 6 8 10 12
CPUE (kg/ ap)
0
2
4
6
8
10
12
14
16
2003
2004
2005
2006
2007
2008
2009
Fig. 17. Mon hly ends in CPUE (kg pe ap) om he ishe y in Sisimiu insho e om 2003 o 2009. Da a o
2009 is incomple e.
Insho e Sisimiu
Yea
2000 2002 2004 2006 2008
CPUE (kg/ ap)
0
2
4
6
8
10
12
To al ca ch ( ons)
0
500
1000
1500
2000
2500
CPUE (kg/ ap)
Uppe con idence limi
Lowe con idense limi
To al ca ch
Fig. 18. S anda dised CPUE index and o al ca ch based on logbook in o ma ion insho e Sisimiu om 2000-
2009. Da a o 2009 is incomple e.
Snow c ab s ock s a us and ad iso y epo
2010
36
Insho e Sisimiu
Yea
2000 2002 2004 2006 2008
GLM index soake ime (hou )
0
20
40
60
80
100
120
Lsmeans
Uppe con idence limi s
Lowe con idence limi s
Fig. 19. S anda dised soak ime index based on logbook in o ma ion insho e Sisimiu om 2000-2009. Da a
o 2009 is incomple e.
Sisimiu insho e
Yea
1996 1998 2000 2002 2004 2006 2008 2010
GLM index CPUE (kg pe ap)
0
5
10
15
20
CPUE
CPUE in he e e ence pe iod 1999 - 2002
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 2009. The mean CPUE o he e e ence pe iod (1999-2002) in Sisimiu insho e is
indica ed wi h a line.
Snow c ab s ock s a us and ad iso y epo
2010
37
Yea
1998 2000 2002 2004 2006 2008
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 (1997-2009) and Sisimiu o sho e (1999–2009). 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
Abundance (NPUE)
0
1
2
3
4
5
6
7
8
ADO1: 82.2 - 100 mm CW
ADO1 in he e e ence pe iod
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 2009.
The mean NPUE o he e e ence pe iod (1999-2003) in Sisimiu insho e is indica ed wi h a line.
Snow c ab s ock s a us and ad iso y epo
2010
38
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
2010
39
Sisimiu insho 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 wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
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 wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0
1
2
3
4
5
Adolescen males
Adul males
2003
2004
2005
2003
2004
2005
Snow c ab s ock s a us and ad iso y epo
2010
40
Sisimiu insho 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 wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0
1
2
3
4
5
Adolescen males
Adul males
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0
1
2
3
4
5
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
Adolescen males
Adul males
2006
2007
2008
2006
2007
2008
Snow c ab s ock s a us and ad iso y epo
2010
41
Fig. 23. Size dis ibu ion o adolescen and adul males om su eys in Sisimiu insho e and o sho e om
2000 o 2009.
Fig. 24. The pe cen age o shell condi ions (1-5) o legal-size adul males (100mm CW) sampled in ap
su eys in Sisimiu insho e and o sho e om 2000 o 2009.
Sisimiu insho e
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (NPUE)
0
1
2
3
4
5
Adolescen
Adul
2009
Sisimiu o sho e
Ca apace wid h (mm)
020 40 60 80 100 120 140 160
Abundance (mm)
0
1
2
3
4
5
Adolescen
Adul
2009
Sisimiu insho e
Yea
1998 2000 2002 2004 2006 2008
Pe cen (%)
0
20
40
60
80
100
SC1
SC2
SC3
SC4
SC5
Sisimiu o sho e
Yea
1998 2000 2002 2004 2006 2008
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
2010
48
O sho e Nuuk - Paamiu
Yea
2000 2002 2004 2006 2008
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 1999-2009. Da a o 2009 is incomple e.
O sho e Nuuk Paamiu
Mon h
0 2 4 6 8 10 12
CPUE (kg/ ap)
0
2
4
6
8
10
12
14
16
2003
2004
2005
2006
2007
2008
2009
Fig. 36. Mon hly ends in CPUE (kg pe ap) om he ishe y in Nuuk-Paamiu o sho e om 2003 o 2009.
Da a o 2009 is incomple e.
Snow c ab s ock s a us and ad iso y epo
2010
49
O sho e Nuuk - Paamiu
Yea
2000 2002 2004 2006 2008
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-
2009. Da a o 2009 is incomple e.
