1
Assessmen o Snow C ab in Wes G eenland
2008
by
AnnDo e Bu meis e and Helle Siegs ad
Pinngo i ale i ik, G eenland Ins i u e o Na u al Resou ces
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 ex-
ploi 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).
Summa y
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.
The ecommenda ions p esen ed he e a e no expec ed o esul in inc eased s ock
biomass in he sho e m, bu only s op he cu en decline I a ebuilding o he s ock
o achie e a highe exploi able biomass and be e ca ch a es is he objec i e hen he
ecommended ca ches should be u he educed o allow he s ock o g ow.
The ca ch le el in Disko Bay should be educed o 1,500 ons, di ided on 300 ons in
he sou he n pa o Disko Bay, 300 ons in he No he n pa o he bay and 900 ons
in Vaiga .
Da a om esea ch su ey sugges he esou ce has show signs o eco e y, excep o
ec ui men which is on a low le el. The o sho e a ea o Sisimiu had been closed o
he pas 2.5 yea , bu e-opened in mid Augus 2007. The comme cial ca ch amoun ed
o 173 ons in he closed pe iod and an addi ional le el o 350 ons was alloca ed o
his a ea, when i e-opened. The e ec o he g ea ly inc eased ca ch in 2007 on he
exploi able biomass o 2008 is unknown. Owing o he low le el o ec ui men , i is
he e o e ecommended ha he a ea emain closed o comme cial exploi a ion.
The ec ui men was ully ha es ed in mos o he managemen a eas. Disko Bay in-
sho e a ea 2 and o sho e Sisimiu a eas a e cha ac e ized by dec easing abundance o
p e- ec ui s.
2
The e is e idence o imp o emen o he s ock in he adi ional ishe y a ea, insho e
Sisimiu . Howe e , cau ion mus be aken, as he imp o emen is associa ed wi h no
ishe y in he jo ds o he pas wo yea s. Despi e inc easing ends in CPUE, mean
ca apace wid h and ec ui men , a high exploi a ion a e insho e can e e se his posi-
i e end.
The Fishe y in he Sisimiu a ea has in ecen yea s concen a ed e o in smalle
geog aphical a eas in he adi ional ishing g ounds as well as alloca ing a conside -
able amoun o e o in new a eas. In his ega d i is no ed ha CPUE is only a good
indica o o s ock biomass when ac o s such as spa ial co e age, e o , season e c.
a e app oxima ely cons an . This is no he case in his a ea and is p obably esponsi-
ble o ishe men main aining s able ca ch a e le els.
The a io o new-shelled ( ecen ly-mol ed) c abs o olde -shelled c abs is mo e han
60% in mos o he managemen a eas indica ing ha comme cial exploi a ion is high
and ha he annual ishe y is based on new ec ui s. The ishe y is he e o e highly
ulne able o luc ua ions in ec ui men .
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 e-
c 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.
Ca ch ecommenda ions a e gi en o he insho e and o sho e o each managemen
a ea and a e based on analysis o biological su eys and logbooks.
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 2008 a e gi en in Table 1.
Table 1. Summa y o ca ch ecommenda ions o he c ab ishe y in 2008 om he G eenland Ins i u e o Na u-
al Resou ces and o al ca ch om 2006 (ca ch s a is ics o 2007 a e incomple e a his ime).
Recommended
ca ch Insho e 2008
Recommended
ca ch O sho e
Ca ch in ons
2006 Insho e
Ca ch in ons
2006 O sho e
Disko Bug 1,500 130 1,008 126
Sisimiu 350 con inued closed 725 201
Manii soq No ad ice con inued closed 60 12
Nuuk-Paamiu 700 1,600 199 974
Recommended ca ch in all 2,550 1,930 1,992 1,313
3
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 ex-
ploi ed p ima ily om Disko Bay in he No h (up o 71 30N) o Paamiu in he Sou h (60
45N). The comme cial c ab ishe y is based on ca ches o males ha each a minimum legal-
size ≥ 100 mm ca apace wid h (CW). 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 1 man-
agemen 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”. To al allowable ca ch
(TAC) es ic ions ha e been imposed since 1995, bu ha e only limi ed he ca ch in some
a eas since 2004. 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 ish-
e 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 al-
lowed o ish in 2005. 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.
The G eenland Ins i u e o Na u al Resou ces (GINR) gi es s ock assessmen and manage-
men 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 e-
qui ed o epo ca ches in logbooks.
4
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. The o e all
annual ca ch is based on landings because ca ch s a is ics om logbooks o bo h small and
la ge essels ha e only been a ailable since 2003 and a e no always comple e. Landings in-
c eased om app ox. 1,000 ons (no TAC) in 1995 o a peak o app ox. 15,000 ons (TAC
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 2006 he o al ca ch has dec eased by app ox.
77% o 3,305 ons (TAC 5,700 ons) despi e he quo a was no being eached (Fig. 2).
The dis ibu ion o he landings in each managemen a ea in Fig. 3 and Fig. 4, show ha a-
di ionally, mos o he landings ha e p edomina ely come om he a eas Disko Bay-
Uummannaq, Sisimiu and Nuuk-Paamiu . Comme cial CPUE is de i ed om ca ch and e -
o da a om logbooks.
The o al ishing e o ( ap hauls) has declined by 81% since 2001 ( om 3,416 o 665 hou-
sand ap hauls du ing 2001-2006) (Fig. 5). The decline has been mos ly due o a declining
numbe o pa icipan s in he ishe y. P elimina y and incomple e logbook da a o 2007
shows o al e o is 240 housand ap hauls.The a io o o al landings o logbooks landing
a ies be ween managemen a eas. The o e all dis ibu ion o he ishe y along he Wes
coas o G eenland om 2003-2007, de i ed om a ailable logbook da a is shown in Figu e
4.
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. F om 2004 o 2007 he numbe o ac i e license holde s in all managemen
a eas dec eased by 55%. The educ ion was 60% in insho e Disko Bay (I-DIS) and 57% in
he o sho e a ea o Nuuk-Paamiu (O-NUP) (Table 2)).
Table 2. Annual de elopmen in he numbe o ac i e ishing essels wi h licenses in he managemen a eas
om 2004-2007
T ends in he Ca ch, CPUE and E o insho e and o sho e will be analysed mo e speci i-
cally o each managemen a ea in hei espec i e sec ions.
Resea ch Su eys
Since 1997, ap su eys ha e been conduc ed annually in insho e a eas o Disko Bay and
Sisimiu . In 2000, a Sisimiu o sho e a ea (Hols einsbo 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 managemen a ea.
Yea I-DIS O-DIS I-MAN O-MAN I-SiS O-SIS I-NUP O-NUP O-NAQ Unkonow
2004 43 19 9 4 19 17 25 28 328
2005 33 15 9 5 16 11 25 31 425
2006 24 14 6 4 14 918 29 111
2007 17 9 4 4 12 10 10 12 0 9
5
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
eco 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 an 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 e-
c ui men p ospec s. Male and emales size dis ibu ions a e also desc ibed o ollow he p o-
g ession o size modes h ough he popula ions and de e mine p imipa ous/mul ipa ous a ios
wi hin he emale popula ion.
Insho e su eys in Disko Bay and Sisimiu
In Disko Bay, 43 s a ions a e sampled annually (Fig. 6a) and in Sisimiu , 40 s a ions a e sam-
pled (Fig. 6b), 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. 6b) in June and a o al o 30-
60 s a ions a e sampled in he Nuuk-Paamiu and Manii soq o sho e a eas in Augus -
Sep embe (Fig. 6c). 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 longline o 16 aps, eigh la ge-meshed (70 mm) aps al e na ing wi h
eigh small-meshed (21mm) aps a app ox. 40 m in e als and bai ed wi h squid.
6
Summa y o he ishe y and su ey da a in each 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 3. Da a o 2007 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 eadily declined o 1,134 ons (88% insho e) in 2006, app oxima ely 27% o he 2001
ca ch.
Insho e - Disko Bay
Fishe y
F om 2000-2001 ca ches insho e inc eased om 2,940-3,950 ons as e o mo e han dou-
bled (613-1274 housand ap hauls, Table 3). CPUE, howe e , dec eased om 4.8 o 3.1
(da a de i ed om a ailable logbook da a). Ca ches and e o ha e s eadily dec eased since
2001 by app oxima ely 74% o 1,008 ons and 219 housand ap hauls, espec i ely, in 2006.
CPUE emained low, be ween 3.1-3.7 kg/ ap du ing 2001-2004, be o e inc easing o 4.6
kg/ ap in 2006. P elimina y da a o 2007 ep esen ing app ox. 23% o he allowable quo a
indica e CPUE in Disko Bay is 4.0 kg/ ap (Table 3). The a io o o al landings o o al ca ch
ob ain by logbooks is 1:1.
The dis ibu ion o he ishe y in Disko Bay om 2003 o 2007, acco ding o a ailable log-
book da a is shown in Figu e. 7. In 2003, he ishing e o was dis ibu ed all along he eas -
e n pa o Disko Bay om he no he n Vaiga a ea o he sou he n pa o Disko Island, as
well as he sou he n pa o Disko Bay. In 2004, much o he ishing e o shi ed om
no heas Disco Bay o a ea 2 o he sou heas coas o Disko Island. The e was, howe e ,
s ill some e o in Vaiga and in he mos -sou he n pa o he Bay. The dis ibu ion o he
ishe y in 2005 indica ed ha e o was p ima ily in he sou heas e n a ea o Disko Island
wi h he ishe y also con inuing in Vaiga and in he sou he n-mos pa o Disko Bay. The
geog aphic dis ibu ion o he ishe y in 2006 was simila o ha in 2005, excep o educed
e o in Vaiga .
The ishe y in Disko Bay ypically 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 2006 when he ishe y
peaked in Sep embe , mainly due o a closu e du ing July and Augus . Mon hly ends in he
ishe y CPUE in 2006 we e s able om Sep embe o Decembe a app ox. 5 kg / ap,
whe eas he CPUE s aidly dec eased a he end o he yea in he p e ious yea s (Fig. 8).
Ea ly season ca ch a es (Ma -May gene ally dec eased o e ome (2004-2007), pe haps be-
cause ea ly season ocused on adi ional a eas. La e season CPUE inc eased om 2004-200,
e lec ing alloca ion o e o o new a eas as he season p og essed. Da a om logbooks sug-
ges ing ha he e has been no ecou se eco e y since 2004, bu a he he ishe y is p og es-
si ely ha es ing all a ailable c abs.
7
Resea ch Su eys
Insho e (A eas 1 and 2)
T ap su eys ha e been conduc ed in 2 insho e a eas o Disko Bay since 1997 (See Fig. 6a
o maps). CPUE o legal-size males ( 100mm CW) in A ea 1 and A ea 2 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 A ea 1 and 7.5-2.3 kg/ ap in A ea 2 (Fig. 9). The 2004 CPUE was he lowes ob-
se ed in he ime se ies. In 2005 and 2006 CPUE in A ea 1 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 A ea 2, CPUE inc eased om 2.3 o 6.4 kg/ ap and has eached he e e ence mean
in 2006. In 2007 A ea 2 CPUE dec eased o 4.4 kg/ ap. Re e ence means a e based on he
a e age kg/ ap om 1999-2002.
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. 10). CW subsequen ly inc eased in bo h a eas in 2005 and
emaining unchanged in A ea 1 o 2007 while he mean CW has inc eased o e he pas 3
yea s in A ea 2.
The abundance o adolescen males (ADO-1), measu ed as numbe pe ap (NPUE), peaked
a 2.2/ ap in A ea 1 in 2001, and 2.6/ ap in A ea 2 in 2002 (Fig. 11). The NPUE o ADO-1
has since declined sha ply in bo h a eas and was a he lowes le els obse ed o he ime
se ies in 2004 in A ea 1. In 2006, he NPUE o ADO-1 males in A ea 1 was 0.8/ ap and in-
c eased in 2007 o 1.8/ ap 2007, abo e he e e ence mean. NPUE o ADO-1 in A ea 2 de-
c eased om 1.7/ ap in 2005 o 1/ ap, he lowes le els obse ed in he ime se ies. The
NPUE o ADO-1 in A ea 2 emains below he e e ence means o he ime se ies.
Annual ends in size dis ibu ion o adolescen and adul males 100mm CW a e shown in
Fig. 12. In A ea 1 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 A ea 2 he ec ui men pulse in 2005, esul ed in in-
c 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.
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 2001-2007 (Fig. 13) and ha e peaked a a ound 70% in 2006 in bo h
A ea 1 and A ea 2. 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 is becoming inc eas-
ingly dependen upon ec ui men .
The a io o p imipa ous and mul ipa ous emales, used o suppo ends in ec ui men , de-
c eased sha ply in A ea 1 om 2000 o 2003, emained low in 2004 and has inc eased un il
2006 and dec eased again om 2006 o 2007 (Fig. 14). The inc ease in A ea 1 in 2005 and
2006 could ei he e lec he loss o a la ge g oup o ma u e emales om he popula ion o
ha a ec ui men wa e could be o hcoming. In 2007 a mino dec ease has been obse ed
bu is a he 2005 le el. In A ea 2 he a io o p imipa ous and mul ipa ous emale has e-
8
mained cons an a a le el o 0.45 om 2004 o 2006, bu dec eased o 0.26 in 2007, sugges -
ing a dec easing ec ui men o ma u e emales o he s ock.
Ou look - Disko Bay Insho e
A ailable ishe y and su ey da a indica e ha he c ab esou ce in Disko Bay has been de-
clining o e he pe iod om 2000 o 2004 despi e a dec ease in o al ca ch and e o by ap-
p oxima ely 50% since 2001. The comme cial ca ch a es emain low and a p esen a e
a ound 3- 4.0 kg/ ap. Su ey CPUE in A ea 1 has inc eased since 2004, and he CPUE was
a he lowes obse ed le el a 1.2 kg/ ap in 2004 and inc eased o 4 kg/ ap in 2007. Re-
c ui men has inc eased since 2004 in A ea 1 and bo h CPUE and ec ui men a e in 2007 a
he mean e e ence poin o he ime se ies. Su ey CPUE in A ea 2 dec eased om 6.4
kg/ ap in 2006 o 4.4 in 2007 and is now below e e ence means o he ime se ies. Cau ion
mus be aken, because ec ui men o ADO-1 has dec eased o his o ically low le els once
again. This sugges s ha he e is only limi ed imp o emen in he esou ce as a whole and
ec ui men p ospec s in he coming yea s a e conside ed poo . Comme cial CPUE a he p e-
sen le el o ec ui men indica e ha he e has been no inc ease in c ab biomass despi e de-
clining ishe y emo als especially in he a ea co e ing he sou he n sho e o Disko Island
(su ey a ea 2). Rec ui men indices o a long- e m p ognosis a e unce ain. The pe cen ages
o new shelled adul (60-70 %) and adolescen (75-90 %) males in bo h su ey a eas indica e
ha he ishe y in Disko Bay is being sus ained by new ec ui s.
Recommenda ions o he 2008 ihe y - Disko Bay Insho e
Su ey da a om 2007 indica e he esou ce has s abilised a a low le el despi e he im-
p o emen in su ey A ea 1, bu he e a e s ill no clea signs o imp o emen o he exploi -
able biomass and p ospec s o an inc ease in he u u e a e s ill unce ain as ec ui men is
poo o su ey A ea 2. I is he e o e ecommended o se he ca ch le el a 1,500 ons di-
ided on 300 ons in he sou he n pa o Disko Bay, 300 ons in he No he n pa o Disko
Bay and 900 ons in Vaiga .
Special commen : The o al ca ch in 2006 was he lowes since 2000. O e he las 5 yea s he
p opo ion o so and new shelled c abs ha e been high and is now a ound 70% which indi-
ca es ha he ishe y is la gely dependen on new shelled ec ui s. These cha ac e is ics o-
ge he wi h he knowledge ha he quo a was no eached in 2006 a e wo ying signs as he
c ab esou ce is highly ulne able o luc ua ions in ec ui men in he sho e m and he e
a e nega i e consequences o ep oduc ion in he long e m associa ed wi h low numbe o
olde shelled adul males.
O sho e - Disko Bay
Fishe y
Ca ches in o sho e Disko Bay ha e inc eased om 112 ons in 2000 o 252-349 ons be-
ween 2001-2003 (Table 3).. Meanwhile, e o inc eased abou 500% om 20 o app ox. 100
(97-116) housand ap hauls. Concu en ly, CPUE s eadily declined om 5.5 o a low o 2.6
9
kg/ ap in 2003. Ca ches in 2005 and 2006 we e 98 ons and 126 ons, espec i ely and he
CPUE has been inc eased om 4.0- 6.7 kg/ ap in he same pe iod. P elimina y logbook da a
om 2007 show CPUE is 5.1 kg/ ap a a p elimina y and incomple e ca ch o 126 ons.
In 2006 and 2007 he o sho e ishe y has almos exclusi ely concen a ed e o a ound he
sou hwes e n pa o Disko Island wi h some spo adic ishing in he sou he n pa o he man-
agemen a ea (Fig. 7).
Ou look - Disko Bay O sho e
Ca ches ha e been be ween 135-350 ons since 2001. CPUE du ing he same pe iod has a-
ied be ween 2.6 and 6.7 kg/ ap. The ishe y da a in 2006 indica e signs o imp o emen .
The ishe y in ecen yea s has almos exclusi ely concen a ed e o a ound he sou hwes -
e n pa o Disko Island wi h some spo adic ishing in he a Sou h. Rec ui men is unknown
because he e a e no su eys unde aken in his a ea.
Recommenda ions o he 2008 ishe y - Disko Bay O sho e
CPUE om he ishe y indica es inc easing biomass o since 2004 and he e a e signs o
s ock imp o emen . A ca ch le el o 130 ons is ecommended, which is he same ecom-
menda ion as in 2007.
Sisimiu
The his o ical ca ch, CPUE and e o da a o he ishe y in Sisimiu in he insho e and o -
sho e a eas a e summa ized in Table 3. Da a o 2007 is only p elimina y and incomple e.
The comme cial ishe y o snow c ab in he Sisimiu a ea began insho e in 1996 and ex-
panded o include he o sho e a ea, p ima ily in Hols einsbo g Dyb, in 1997. O e all ca ches
we e be ween 2,543-2,724 ons (>82% om he o sho e a ea) om 2000-2002, bu ha e de-
c eased ma kedly since, as a esul o dec easing ca ches o sho e. The ca ch in 2006 was
app ox. 926 ons o which 725 ons we e aken insho e while 210 ons we e aken o sho e
whe e 2 boa s ecei ed dispensa ion o ish in he a ea ha has been closed science 2005, bu
eopened du ing 15 Augus o 31 Oc obe 2006. The dis ibu ion o he ishe y o e he las
ew yea s shows ishing e o has mo ed ou side he jo ds in he adi ional ishing g ounds
nea Sisimiu . Fu he mo e wo jo ds (Nd . S oem jo d and Nd . Iso oq) no h om
Sisimiu has been exploi ed since 2004.).
Insho e Sisimiu
Fishe y
F om 2000-2004 ca ches s eadily inc eased om 327 o 1,111 ons. Meanwhile, CPUE in-
c eased om abou 2.8 kg/ ap in 2000-2001 o a highe le el, anging 3.7-4,6 kg/ ap du ing
2002-2004 (Table 3).. E o dec eased om 2000 o 2002, bu mo e han doubled in 2003
and declined by mo e han a ac o o 3 o 2006. Since e o has been dec easing o a his o i-
16
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 3.
The Nuuk-Paamiu a ea is ano he impo an ishing a ea whe e o al ca ches peaked a mo e
han 5,000 ons in 2001. 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 easing 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 ha e been 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 hal o 1,173 ons in 2006 (974 ons o sho e
and 199 ons insho e).
Insho e - Nuuk-Paamiu
Fishe y
Ca ches peaked a 4,157 ons in 2001 and hen declined by mo e han 95% o 199 ons in
2006 (Table 3), while ishing e o declined by 96%. Ca ches ha e been s eadily declining
concu en wi h a educ ion in e o , which has been mo ing o sho e in ecen yea s. This is
e lec ed in he logbook da a showing he majo i y o ca ches om he small essels (insho e
ishe y) a e aken o sho e and is suppo ed by he gene al dis ibu ion o insho e ishing e -
o being somewha con inuous wi h he o sho e ishe y, nea he bounda y (Fig. 30). CPUE
has g adually inc eased du ing his pe iod om a low o 2.8 kg/ ap in 2002 o 8.4 kg/ ap in
2005, bu dec eased o 6.9 in 2006, despi e a 37% educ ion in e o (Table 3). P elimina y
comme cial da a in 2007 shows a CPUE o 7.3 kg/ ap a a ca ch o 66 ons. The dis ibu ion
he ishe y in 2004 and 2006 has been concen a ed nea he middle o he managemen a ea
in sub-a eas Fiskenæs-Danasdyb and F ede ikshåb-Ra nsdyb. The e is, howe e some ish-
e y in he no he n pa o he a ea - God håb. P elimina y da a om he ishe y in 2007 show
a simila dis ibu ion o 2006.
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
biological pa ame e s a e no a ailable. The comme cial CPUE inc eased o 2006 as o al
ca ch and e o dec eased bu some 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. P elimina y da a om 2007 show a dec ease
in CPUE.
Recommenda ions o he 2008 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
17
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 700 ons o 2008.
O sho e - Nuuk-Paamiu
Fishe y
F om 2000-2002, ca ches in Nuuk-Paamiu o sho e declined om 1,339 o 761 ons. Con-
cu en ly, CPUE also declined by app oxima ely 50% (5.4-2.8). Ca ch mo e han doubled o
1,611 ons in 2003 and u he inc eased o 1,980 ons as e o dec eased o 244 housand
ap hauls in 2005. The comme cial CPUE inc eased om 4.2 kg/ ap in 2003 o 8.1 kg/ ap
in 2005. In 2006 he ca ch dec eased o 974 ons, which was no limi ed by he quo a o 1,800
ons. E o dec eased by 43% in compa ison o he yea be o e and he comme cial CPUE
dec eased o 6.9 kg/ ap. P elimina y da a o 2007 show a CPUE o 7.2 kg/ ap a a ca ch o
358 ons. The e ha e been 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 . The ishe y s a s in Janua y and
has he highes ca ch a es om Feb ua y o May, app ox 9 – 11 kg/ ap in 2004 and 2005
and 7 –8 kg/ ap in 2006 and 2007. CPUE s eadily declines du ing emainde o he season
(Fig. 31). The Feb-May da a indica e ha ea ly-season CPUE in 2007 was compa able o ha
in 2006, a a lowe le el han du ing 2004-2005.
The dis ibu ion in he o sho e ishe y has changed sligh ly in ecen yea s 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 he middle o he
Nuuk-Paamiu (sub-a eas Fiskenæs-Danasdyb and F ede ikshåb-Ra nsdyb) in 2004 and 2005
(Fig. 30). Fu he mo e, o he i s ime, 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 a ea in 2005 Mon hly
ends in comme cial da a gene ally show subs an ial declines in bo h ca ches and CPUE du -
ing he yea , sugges ing he esou ce is being deple ed conside ably as he ishing season
p og esses.
Resea ch Su eys
Due o echnical p oblems wi h he hyd aulic sys em on he esea ch ship Adol Jensen,
he su ey in 2007 has been cancelled. No new da a is a ailable o he s ock assessmen
and ad ice.
A e a pe iod o e y low su ey CPUE o legal-size males om 2001-2004 he CPUE has
inc eased o e he las 2 yea s om 1.4 o 3.4 kg/ ap in 2006 (Fig. 32a). T ends in CPUE
wi hin 3 sub-a eas om sou h o no h (F ede ikshåb-Ra nsdyb - Fiskenæs-Danasdyb - God-
håbsdyb) indica e ha he inc ease, al hough small, is h oughou he a ea wi h he g ea es
inc ease being obse ed in he sub-a ea Fiskenæs-Danasdyb in he middle o he Nuuk-
Paamiu a ea (Fig. 32b). The a e age CW o legal-size males declined om app ox. 120mm
CW in 2003 o app ox. 113mm in 2005 (Fig. 33). 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), whe eas he
a e age CW o legal-size males in he sou he n sub-a eas Fiskenæs-Danasdyb and F ede ik-
18
shåb-Ra nsdyb has been s able in ecen yea s. The o e all abundance (NPUE) o adolescen
males (ADO-1) 1 yea om a aining legal size has inc eased o 0.7 c abs/ ap in 2006 a e a
pe iod o dec easing alues o e se e al yea s (Fig. 34). The inc ease is, howe e , almos ex-
clusi ely due o a g ea e abundance o ADO-1 in he sub-a ea Fiskenæs-Danasdyb and hus
indica ions o imp o ed ec ui men in he nea u u e o e all appea s o be spa ially limi ed
as he abundance o adolescen s is s ill low in he no he n and sou he n sub-a eas. Annual
size dis ibu ions o male c abs in Nuuk-Paamiu a ea indica e he e has been some p og es-
sion o adolescen males in o he legal-size o he s ock as he modal wid h o adul s has ex-
ended beyond he legal-size ( 100mm CW) and become b oade since 2002 and 2003 (Fig.
35). This p og ession appea s o be on a small scale pa icula ly in he sub-a eas God håb and
F ede ikshåb-Ra nsdyb whe e a mode a 85mm has ully ec ui ed by 2006. 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 dec eased conside ably in 2006 (62%
SC1+2) in compa ison o 2005 when new shelled adul males exceeding 100mm CW com-
p ised 80% (Fig. 36). This was obse ed in all sub-a eas and oge he wi h he high CPUE is
likely a esul o a ec ui men pulse eaching maximum size as old-shelled adul s p edomi-
nan ly in 2 o he 3 sub-a eas. The a io o p imipa ous:mul ipa ous emales o e all and in all
sub-a eas o Nuuk-Paamiu (Fig. 37), sugges s ha ec ui men will decline in he u u e.
Ou look - O sho e Nuuk-Paamiu
The inc ease in comme cial CPUE om 4.2 o 8.1 kg/ ap in 2005 a a ca ch o 1,798 ons
seems o ha e come o a hal in 2006 as he CPUE dec eased o 6.9 kg/ ap a a ca ch o 974
ons. T ends in he su ey CPUE indica e an inc ease in he biomass since 2004 bu he o e -
all su ey CPUE is s ill compa a i ely low a 3.4 kg/ ap and does no e lec he ishe y da a
di ec ly. Su ey da a om 2006 also indica e he e may be an inc ease in ec ui men in he
sho e m as indica ed by an inc ease in ADO-1 albei mainly in he cen al pa o he a ea
(Fiskenæs-Danasdyb). Rec ui men p ospec s o he nea u u e appea o poo in he no h-
e n and sou he n pa o he a ea bu mo e p omising in he middle. The a io o p imipa -
ous:mul ipa ous emales u he sugges s a decline in ec ui men in he longe e m. The dis-
ibu ion o he ishe y in 2004 and 2006 indica es he ishe y has mainly a ge ed a eas o
mode a ely high comme cial CPUE, la gely concen a ed in Fiskenæs-Danasdyb in he mid-
dle o he o sho e a ea on he inne banks wi h e o inc easing in he no he n a ea o
God håbsdyb. The decline in he comme cial CPUE om 2005 o 2006 may indica e ha al-
hough some su ey indices sugges an imp o ed biomass and o hcoming ec ui men in he
sho e m, he a ea may no be able o sus ain he cu en ishe y o 2,000 ons., especially as
esou ces in he ishing a eas a ge ed a e deple ed and ec ui men is only s ong in a ew lo-
calized a eas.
Recommenda ions o he 2008 ishe y - O sho e Nuuk-Paamiu
No new biological da a a e a ailable o 2007. In 2006 da a show a e 2 yea s o inc easing
comme cial biomass he CPUE in 2006 dec eased sligh ly om 8.0 o 6.9 kg/ ap a e a de-
c ease in ca ch by mo e han hal om he p e ious yea o 974 ons. Su ey CPUE has in-
c eased sligh ly om 2004-2006 bu is s ill poo a 3.4 kg/ ap. Sho - e m ec ui men indic-
19
es sugges a mode a e inc ease bu his appea s empo ally and spa ially limi ed o one main
a ea. Longe - e m ec ui men p ospec s a e highly unce ain because ends in ADO1 males
and p imipa ous emales do no ag ee.
To ake in o conside a ion ec ui men unce ain ies and he dec easing esou ce biomass ob-
se ed in 2006, i is ecommended ha he ca ch le el o 2008 does no exceed 1600 ons,
iden ical wi h he quo a o 2007.
Special commen s
Owing o he cancelled su ey in 2007, he e is no ishe y-independen da a, o alida e he
appa en dec ease in he exploi able biomass in his a ea.
O he a eas wi h a limi ed ishe y
Upe na ik
The his o ical ca ch, CPUE and e o da a o he ishe y in Upe na ik is shown in Table 3.
The las ishe y ca ch da a o he Upe na ik a ea is 65 ons om 2004. No ca ch o landings
da a is a ailable o 2005 o 2007.
The quo a was se a 100 ons bu no logbook da a was ecei ed o de e mine ca ch s a is ics.
I is mos likely ha he comme cial ishe y is ei he e y low o no unde aken anymo e. In
2007 no quo a was gi en o his a ea.
Ou look - Upe na ik
A eliable ou look o Upe na ik is no possible as he e a e no biological su eys unde aken
in his a ea and CPUE and ishe y dis ibu ion de i ed om logbook da a is no a ailable.
Recommenda ions o he 2008 ishe y - Upe na ik
Due o insu icien ishe y da a and no biological su eys no ecommenda ions o his man-
agemen a ea a e gi en.
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 3.
Na saq-Qaqo oq Insho e and O sho e
O e all ca ches in Na saq-Qaqo oq ha e dec eased 6- old om 822-133 ons om 2001-
2003. A ishe y o 541 ons om landing da a has been 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 ishe y. The e has
been no epo ed ishe y since 2005.
20
Ou look - Insho e Na saq-Qaqo oq
No new da a is a ailable o his managemen a ea.
Recommenda ions o he 2008 ishe y - Na saq-Qaqo oq
The e a e no su eys in his a ea and subs an ial ishe y da a a e no a ailable, he e o e no
ad ice is gi en.
21
Tables
Table 3. Ca ches, ca ch a es (CPUE) and e o in managemen insho e and o sho e a eas om 2000-2007.
*2007 da a is p elimina y and incomple e.
ca ch o sho e)
Summa y o annual ca ches in ons, CPUE (kg/ ap) and e o ( housands) as well as quo as since 2004 o he
c ab ishe y insho e and o sho e in 6 managemen a eas (Upe na ik, Uummannaq-Disko Bug , Sisimiu ,
Manii soq-Kangaamiu , Nuuk-Paamiu and Na saq-Qaqo oq). Ca ch da a was de i ed om landings and log-
book da a. CPUE (kg/ ap) and E o was de i ed om logbook da a and weigh ed up o he highes o als (log-
book da a o landings) i necessa y. ** Ca ch da a o Insho e and O sho e Sisimiu in 2004 is based on land-
ings by small essels (818 ons, i.e. he maximum ca ch insho e as small essels ish bo h insho e and o sho e)
and la ge essels (614 ons i.e. minimum
22
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.
23
Figu e 2. To al ca ch and quo a size om 1995-2007. Da a om 2007 is only p elimina y.
Fig. 3. Snow c ab landings in he 6 managemen a eas o Wes G eenland 2000-2006.
Da a o 2006 a e p elimina y and incomple e.
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
Yea
To al ca ch ( ons)
To al ca ch To al qou a
Snow C ab Landings
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
2000 2001 2002 2003 2004 2005 2006 2007
Yea
Landings ( ons)
Upe na ik
Disko Bay-Uummannaq
Sisimiu
Manii soq-Kangaamiu
Nuuk-Paamiu
Na saq-Qaqo oq
24
Fig. 4. Dis ibu ion o he c ab ishe y o Wes G eenland wi hin each managemen a ea om 2003 -
2007, de i ed om logbook da a. Lines a e used o sepa a e managemen a eas. Insho e and o sho e
a eas a e sepa a ed by a basis-line.
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
Figu e 5. To al numbe o e o in all managemen a eas om 2000 o 2007. Da a om 2007
is p elimina y.
Fig. 6a. 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).
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
2000 2001 2002 2003 2004 2005 2006 2007
Yea
E o ('000)
32
Fig. 14. Annual ends in he a io be ween p imipa ous and mul ipa ous in A ea 1 and A ea 2, Disko
Bay 2000-2007.
0
0.5
1
2000
2001
2002
2003
2004
2005
2006
2007
Yea
P imipa ous: (P imipa ous + Mul ipa ous) emale
Disko Bay, A ea 1
0
0.5
1
2000
2001
2002
2003
2004
2005
2006
2007
Yea
P imipa ous: (P imipa ous + Mul ipa ous) emale
Disko Bay, A ea 2
33
Fig. 15. The dis ibu ion and c ab ishe y in Sisimiu insho e and o sho e in 2003 -2007 he ci cles
indica e new and inc easing a eas o e o and ca ch in compa ison o p e ious yea s. The coas al line
indica es he basis- line sepa a ing he o sho e om he insho e.
34
Fig. 16. Mon hly ends in CPUE (kg pe ap) om he ishe y in Sisimiu insho e and o sho e om
2004 o 2007. Da a o 2007 is incomple e.
Fig. 17. Annual ends in CPUE (kg/ ap S.D.) o legal-size males ( 100mm CW) om ap su eys
in Sisimiu insho e om 1997 o 2007 and Sisimiu o sho e 2000-2007. The mean CPUE o he e -
e ence pe iod (1999-2003) in Sisimiu insho e is indica ed wi h a line and 2000 o 2003 o he o -
sho e a ea.
0
2
4
6
8
10
12
Jan Feb Ma Ap May Jun Jul Aug Sep Oc No Dec
Mon h
CPUE (Kg/ ap)
2004 2005 2006 2007
Insho e Sisimiu
Sisimiu insho e
0
5
10
15
20
25
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
Yea
CPUE (kg/ ap)
CPUE
A e age CPUE o he e e ace pe iod 1999 o
2003
Sisimiu o sho e
0
5
10
15
20
25
1999
2000
2001
2002
2003
2004
2005
2006
2007
Yea
CPUE (kg/ ap)
CPUE
"A e age CPUE o he e e ace pe iod 2000 o 2003"
35
Fig. 18. Annual ends in he mean ca apace wid h (CW) o legal-size males ( 100mm CW) om
ap su eys in Sisimiu insho e (1997-2007) and Sisimiu o sho e (1999-2007).
Fig. 19. Annual ends in he abundance NPUE (No. c abs pe ap S.D) 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 and o -
sho e a eas om 2000 o 2007.
110
111
112
113
114
115
116
117
118
119
120
1996 1998 2000 2002 2004 2006 2008
Yea
A e age Ca apace wid h (mm)
Insho e O sho e
Sisimiu insho e
0
0.5
1
1.5
2
2.5
3
3.5
2000
2001
2002
2003
2004
2005
2006
2007
Yea
Abundance (NPUE)
Ado-1: 82.2 - 100 mm CW
Sisimiu O sho e
0
0.5
1
1.5
2
2.5
3
3.5
2000
2001
2002
2003
2004
2005
2006
2007
Yea
Abundance (NPUE)
Ado-1: 82.2 - 100 mm CW
36
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu insho e / 2000
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu insho e / 2001
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu insho e / 2002
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu insho e / 2003
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Ca apace wid h (mm)
Sisimiu insho e / 2004
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu o sho e / 2000
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu o sho e / 2001
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu o sho e / 2003
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu o sho e / 2004
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Ca apace wid h (mm)
Sisimiu insho e / 2005
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Ca apace wid h (mm)
Sisimiu o sho e / 2005
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Ca apace wid h (mm)
Sisimiu insho e / 2006
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Ca apace wid h (mm)
Sisimiu o sho e / 2006
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Ca apace wid h (mm)
Adolescen male
Adul male
Sisimiu insho e / 2007
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Ca apace wid h (mm)
Adolescen male
Adul male
Sisimiu o sho e / 2007
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
Sisimiu o sho e / 2002
Fig. 20. Size dis ibu ion o adolescen and adul males om su eys in Sisimiu insho e and o sho e
om 2000 o 2007.
37
Fig. 21. The pe cen age o shell condi ions (1-5) o legal-size adolescen and adul males
( 100mm CW) sampled in ap su eys in Sisimiu insho e and o sho e om 2000 o 2007.
Fig. 22. Annual ends in he a io be ween p imipa ous and mul ipa ous emales in Sisimiu insho e
and o sho e om 2000 o 2007.
Shell condi ion, Adolescen male > 100 mm
CW, Sisimiu , Insho e
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1998
2000
2002
2004
2006
Yea
P ocen
SC5
SC4
SC3
SC2
SC1
Shell condi ion, Adul male > 100 mm CW,
Sisimiu , Insho e
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1998
2000
2002
2004
2006
Yea
P ocen
SC5
SC4
SC3
SC2
SC1
Shell condi ion, Adul male > 100 mm CW,
Sisimiu , O sho e
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1999
2001
2003
2005
2007
Yea
P ocen
SC5
SC4
SC3
SC2
SC1
Shell condi ion, Adolescen male > 100 mm CW,
Sisimiu , O sho e
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1999
2001
2003
2005
2007
Yea
P ocen
SC5
SC4
SC3
SC2
SC1
0
0.5
1
1.5
2
0
15
30
45
60
75
90
105
120
Abundance (NPUE)
Sisimiu , o sho e / 2000
0
0.5
1
2000
2001
2002
2003
2004
2005
2006
2007
Yea
P imipa ous: (P imipa ous + Mul ipa ous) emale
Sisimiu Insho e
0
0.5
1
2000
2001
2002
2003
2004
2005
2006
2007
Yea
P imipa ous: (P imipa ous + Mul ipa ous) emale
Sisimiu o sho e
38
Fig. 23. Annual dis ibu ion o he ishing e o in Manii soq-Kangaamiu A ea om 2003 o 2007.
Da a o 2007 is p elimina y and incomple e.
39
Fig. 24. The CPUE (kg/ ap S.D.) om ap su eys in Manii soq-Kangaamiu o sho e in 2003 and
2005-2006.
Fig. 25. The abundance (No. o c abs pe ap S.D.) o adolescen male c abs, ADO-1 (82.2-100mm
CW), ADO-2 (67.2-82.2mm CW) and ADO-3 (53.2-67.3mm CW) expec ed o ec ui o he ishe y in
1, 2 and 3 yea s om Manii soq-Kangaamiu o sho e su ey in 2003 and 2005-2006.
O sho e - MAN
0
4
8
12
2000
2001
2002
2003
2004
2005
2006
2007
Yea
CPUE (kg/ ap)
CPUE A e age CPUE in he e e ence pe iod
O sho e, O-MAN
0
0.5
1
1.5
2
2.5
3
1999 2001 2003 2005 2007
Yea
Abundance (NUPE)
Ado-1: 82.2 - 100 mm CW
40
Fig. 26. The equency (%) o shell condi ion (1-5) in legal-size males (>100mm CW)
om he Manii soq-Kangaamiu o sho e a ea in 2003 and 2005-2006.
Fig. 27. The a e age ca apace wid h (CW) o legal-size males ( 100mm CW S.D.)
om ap su eys in Manii soq-Kangaamiu o sho e in 2003 and 2005-2006.
Skjoldkondi ion, Voksne > 100 mm CW,
O sho e, O-MAN
0%
20%
40%
60%
80%
100%
2001 2003 2005 2007
Å
P ocen
SC5
SC4
SC3
SC2
SC1
106
108
110
112
114
116
118
120
122
124
126
2000 2001 2002 2003 2004 2005 2006 2007
Yea
A e age Ca apace wid h (mm)
O-NUP O-MAN
41
Fig. 28. Size dis ibu ion o adolescen and adul male snow c abs
om ap su eys in he Manii soq-Kangaamiu o sho e a ea in 2003 and 2005-2006.
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
O sho e, O-MAN / 2003
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
O sho e, O-MAN / 2005
0
0.5
1
1.5
2
2.5
0
20
40
60
80
100
120
140
160
Abundance (NPUE)
O sho e, O-MAN / 2006
