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!!!!W Scientific Excellence. Respurce Protection & Conservation • Benefits for Canadians Excellence scientifique • Protection et conservation des ressources • Beneficesaux Canadiens

Lobster (Homarus americanus) fishery sea sampling

data from 1989 to 1994, for fishing Area 24 in the

southern Gulf of St. Lawrence.

Robichaud G., F. Savoie, W. Landsburg, P. Mallet and M. Lanteigne

Department of Fisheries and Oceans

Science Branch, Maritimes Region

P.O. Box 5030

Moncton, New Brunswick

E1C 9B6

1996

Canadian Data Report

of Fisheries and Aquatic Sciences 989

Fisheries and Oceans

Peches et Oceans C d··· . ana a

Canadian Data Report of isheries and Aquatic Sciences

Data reports prO\ ide il medium lor liling and archiving data compila tions where little or no analysis is Included. Such compilat ioll !> commonly", ill have been plepared In ,up port 01 other Journa l publkution or report:.. The ubject mailer of uata report reneCl~ Ihe bloau illtereSI~ and rolicie ... of the DepUliment oJ Fi . herie~ and Ocean ' . namely . Ii~herje~ and 3\.luutic ~ciem:e.

Duta n:p ort · Me not 1I1leIH.led 101 gt:neraJ diql ihul ion and the contents 111\1:.t nOI he referred 10 in nth!:!! publication, 1\ itbolll pfiOl \\ ritten allthorizatioLl from the lS'wing establishment The wrreci citation apre,lT abo\t~ t he ab~tract of each report. Data report~ are ab~tlacted in .-Iqualh S< le!!C(',\ (//111 Fi,\heries Ah.\Il'aCl.\ and ind \.eel in til Depar tment's annual inde:-.. lO ~cientili ,lnJ Lechni 'a l publications

l\Iumber., I 25 111 lh l~ ~erie~ were i~ , ued a!o. Fi~heric~ and Marine Service Data R.ecord . Number 26 150 \\CI'C i. ~ued a~ f)qnlilnlenl 01 f-i ' herie~ and the Em lron men!. Fishel ies and Marine S CI \'ict: D:lIa Rcrnn~ . rhe current serie~ name wa~ iIltl'Oeluced with Ihe rublication n/ report Ilumber 16/

Data repMb are produced regiofwlh hIll all: numbered liationally. RCqlh.' ts f~)f indl\ idual reports will he filled b\ th.: i. ~uil1g '>lahll~hl11enl li~tecl 011 the rronl CO\ l:~ and Lille pagt' . Ollt -\lI-~I,lc" rerOII~ \\ill he '>lIpplied 10f a fee by commercial agents .

Rapport stati'ltique canadien des sciences halieutiques et aquatiques

Le~ rapports .. tati~li411C'> ,en en! ;i cla~,el <:1 a archiver les compilaliom de donnees pOtli IC~ljuelle., il \ it peu ()U pOint tl'anal\ se, Ce~ compilal ions auront d'orc/rnaire e((~ prepan~es ,I I'appul d'aU lre~ publicatIOns Oll I'ippon~ Les SUlet~ de:, rarp01"l~ "lati"liL!ue~ refh!tent la \ii~te garnme de~ intereb e\ dc~ rolillque:. du mini~ter-= de ... Perht~ el des Ocean~ c'est-cl -dir t' les ~cieil("e., haliculique el aquatiyues.

LL'; rap!1Qn~ \t<:lli,l iqu cs nl' ~(lnl p,h de~line iI lIlle \;1"le dislrihution CI Icul contenu Ilc dOl t pa~ etre lTIent l(llln C dam une publication san') Llulor isalion enil': rrealable cle l\eLabli~~ement ilUlClil Le titlL l:\.acl P(tl ait au-dessliS du r ":~um ~ de chaqut: rapport. Lc. rapp0rl\ .,tall !llj\lc . sonl re'lll11~'> dall~ la rc\ lie Rcltllllt;\ d.'.1 .Iciel/(e l oquullqUl'.\ el Iw!iell/I({III'.\. d il<.. om d,, ' \rs dans rinde .... annuel des rul iil'(1 lions sc:ient ifiqllts el lechn\(lue.~ tlu Ministclt:

Le~ numero. 1 a 25 de cclte ,erie onl tit': publicsli litre de releves~tal i ~lIqucs, Set .. vices des peches et dt' I" mel . t:~ ilUl11eflL 26 a IhO llnt elt; publie a litre de rappoth slall lique~ du Sen ice de~ p;("he~ el dt la tnel ntil\l~lere Je~ Peches et de l'En' ironn\:"men!. Le nl)m aC1l1C1 de !~I )2ric <t elt' elahli lor, de la parulion du nun1en' 1ft!

lcs rapportl.: '[(lf l, t!l)llt"; . OIl! PWdllll' a l'<!l:heloll regional. mai!- nlimt'rotr~ <l

I'echelon national. Lt's demanJe- lit rapport'; ,el 0111 ~atisfajte~ p.n I"etabli"elllem auteul donI ie nom ligUle 'llf 1<1 COI1\':r!ure el la rage du litre , Lcs rHppolis CPl.lhC: ~erlll1l fOllrnis COntre ICln blilion pa l lie' (lgerlh c()J1llT1erc iuux .

•

Canadian Data Report of Fisheries and Aquatic Sciences No. 989

1996

Lobster (Homarus american us) fishery sea sampling data ·from 1989 to 1994, for fishing Area 24 in the southern Gulf of St. Lawrence .

by

Robichaud G., F. Savoie, W. Landsburg, P. Mallet and M. Lanteigne

Department of Fisheries and Oceans Science Branch, Maritime Region

P.O. Box 5030 Moncton, New Brunswick

E1C 9B6

ii

© Minister of Supply and Services Canada 1996 Cat. no. Fs 97-13/989 ISSN 0706-6465

Correct citation for this publication is:

Robichaud G., F. Savoie, W. Landsburg, P. Mallet and M. Lanteigne. 1996. Lobster (Homarus americanus) fishery sea sampling data from 1989 to 1994, for fishing Area 24 in the southern Gulf of St. Lawrence. Can. Data Rep. Fish Aquat. Sci. 989: vii + 33 p.

I

•

•

iii

TABLE OF CONTENTS

List of tables .. ..... ....... .. .. .. .. .... ..... ... ....... ..... .. .. ... . ...... ............. .. .. .... .... .. ... .... . .... ................ .. ... iv

List of figures.. .. ......................... .... ... ..... .......... .......... .................. ............ ................ ...... ...... iv

Abstract.. ................... .... .. .. ........... .... ... .. .... ..... ........ .. .............. ......... ... .... ............. ......... ....... vii

Resume. .... ........... ....... .. ...... .... ...... .. .......... ........ .. .. ....... ..... ... ...... ...... ....... ... ............ ...... .. .... vii

Introduction ... ... ....... .. .... .. ........ .......... ...... .. ... .. .. ... .......... ... ....... .......... .. .. ...... ......... ..... ... ...... ..

Materials and Methods. ....... ... ...... .... ......... .. ... ............ ....... ........ ........... ... ..... ... ...................... 1

Results.... ............ ................. .... ........................ .... ...... .. ... ... ...... ....... ...... .. .......... ................. .. 2

Discussion...... .... .. .. .. ...... .... ...... .. .. ... .. .. .. ...... .. .. ...... .. .. .... .. .. .... .. ...... ..... .... .. .. ....... . .. .. .. .... .... ... 3

Acknowledgements... .................... .......... .......... ......... .... ... ....... .. ... ... .. ....... ........ .......... ......... 3

References... ............... ...... ....... .... .... .... ...... ... .... ........ ............. ... ....... ... .. .. .... ...... . ............ .... . 3

Table 1.

Table 2.

Table 3.

Table 4 .

Figure 1.

Rgure 2.

Figure 3.

Rgure 4.

Figure 5.

Figure 6.

Figure 7.

iv

LIST OF TABLES

Dates of lobster fishing seasons, trap limits and minimum carapace size by

lobster fishing area (LFA) in 1994 for the southern Gulf of St. Lawrence

(Maritimes Region) .. ..... ... .... ..... ..... ... .... ..... . ... ... . ...... ... .... . ..... ... ...... . ...... ..... . 4

Year of legal minimum carapace size change by lobster fishing area (LFA)

in the southern Gulf of St. Lawrence (Maritimes Region). ...... ..... ... .... ..... . .. .... 4

The opening and closing dates of the lobster fishing season for each

lobster fishing area (LFA) between 1989 and 1994 ... ... ..... ...... ... .... .. ... ...... . .

Dates of lobster sea sampling between 1989 and 1994 for the four

reference ports in LFA 24. The number of traps sampled for each

4

sample are indicated (N).. ... .... . ..... ... . .. ..... .. ... .. .... ..... .. ..... .... ... .. .. ...... . ... .... .. 5

LIST OF FIGURES

Lobster fishing areas (LFA) in the southern Gulf of St. Lawrence and

reference ports in area 24 .... .. .... ..... .. ...... ....... .. ....... ... .... ... .... .. .. ...... ..... .. .

Lobster carapace length (C.L.) as measured during sea sampling .......... ... .

Lobster size frequency distributions for sea samples taken from 1 990 to

1994 at the beginning, middle and end of the fishing season in

Tignish, P. EI. (Area 24) .. .... .. ......... .. ..... .. ..... ... ...... .. ...... .. .. .. ...... ....... .. .... .

Berried female lobster size frequency distributions for sea samples

taken from 1990 to 1994 at the beginning, middle and end of the

6

7

8

fishing season in Tignish, PEl. (Area 24) ... .... ..... .............. .......... ... .... .. ... 9

Lobster size frequency distributions for sea samples taken from 1989 to


Malpeque, P.EI. (Area 24) ..... ......... ... ... ... .. ...... .... .... .. .... ........ ... .. .... .. .... .

Berried female lobster size frequency distributions of sea samples

taken from 1989 to 1994 at the beginning, middle and end of

10

the fishing season in Malpeque, PEl. (Area 24).... ..... ... . .... ......... ......... .. 11



Tracadie Bay, P.EI. (Area24) .. .... ...... .... .. .. ....... .. ...... ... .. .... ... ... .. .. ..... .. ..... .. . 12

••

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• Figure 8.

Rgure 9.

Figure 10.

Figure 11.

Rgure 12.

Figure 13.

Rgure 14.

Figure 15.

Rgure 16.

Figure 17.

•

v


taken from 1989 to 1994 at the beginning, middle and end of the

fishing season in Tracadie Bay, P.E.I. (Area 24) .. ...... .. .... . .. .. ... . ..... .. ...... ... 13



North Lake, P. E.I. (Area 24) .......... ... .. ....... ...... ... .. ...... ..... .... ..... .. ... ... ....... .


taken from 199i to 1994 at the beginning, middle and end of the

fishing season in North Lake, P.E.I. (Area 24) ...... ... .... .. .... ............... .... .. .

Percentages of males, females and berried females for sub-legal,

canner and market lobster sampled in Tignish, P.EI. between

1989 and 1994 ...................... .. ........................ .. ....... ................ ..... ...... .


canner and market lobster sampled in Malpeque, P. EI. between

14

15

16

1989 and 1994.............. ... .................................................................... 1 9


canner and market lobster sampled in Tracadie Bay, P.E.I. between

1989 and 1994 ................................................................ ... .. ............... .


canner and market lobster sampled in North Lake, P.E.I. between

1991 and 1994 ...... .......................... ........................ .... ........................ .

Percentages of sub-legal, canner and market lobsters sampled in

Tignish, Malpeque, Tracadie Bay, and North Lake, P. EI. between

1989 and 1994 .. ..................... .... ................................................ ... .. .. .. .

Cumulative lobster catch per 1.58 rrm size class at the beginning, middle

and end of the fishing season in Tignish, P.E.I. between

1990 and 1994. Dotted vertical lines represent minimum carapace size

22

25

27

for canner and market lobsters respectively............ .. .... .... ... ......... ... ... ..... 30

Cumulative lobster catch per 1.58 rrm size class at the beginning, middle

and end of the fishing season in Malpeque, P. EI. between


for canner and market lobsters respectively.............. ............................... 31

Rgure 18.

Figure 19.

vi

Cumulative lobster catch per 1.58 mm size class at the beginning, middle

and end of the fishing season in Tracadie Bay, P.E.1. between


for canner and market lobsters respectively.......... .. ............ ... ... .... .. .. .... ... 32

Cumulative lobster catch per 1.58 mm size class at the beginning, middle

and end of the fishing season in North Lake, P.E.1. between


for canner and market lobsters respectively... . ... . .... ........ .. .. .. .... .... ...... ..... 33

•

vii

ABSTRACT

Between 1989 and 1994, sea sampling data were collected during the lobster fishing season in Tignish ,

Malpeque, Tracadie Bay and North Lake, P. E.I. (Lobster Fishing Area 24). Lenght frequency distributions

for males, females and berried females were compiled for each year. The percentages of sub-legal,

canner and market size lobster for each port, and the catch composition (males, females and berried

females) at the beginning, middle and end of the fishing season are presented in this report .

RESUME

Entre 1989 et 1994, des donnees d'echantillonnage en mer ont ete recueillies durant lasaison de peche

au homard dans les regions de Tignish, Malpeque, Tracadie Bay et North Lake, I.P.E. (zone de peche au

homard 24). Des distributions de frequence de taille pour les males, les femelles et les femelles ovigeres

ont ete produites pour chaque annee. Les pourcentages de homards de taille sous-Iegale, de

conserverie (canner) et de marche (market) pour chacun des ports, ainsi que la composition (males,

femelles et femelles ovigeres) de la capture au debut, au milieu et a la fin de la saison de peche sont

presentes dans ce rapport.

1

INTRODUCTION

The lobster (Homarus american us) fishery is the most important coastal fishery in the southern

Gulf of St. Lawrence. In 1994, 3,203 licences were issued and the total landings were 17,864 tons for a

value of $137 millions. Landings for lobster fishing area (LFA) 23,24, 25, 26A and 26B were 4078 t,

4762 t, 4444 t, 3470 t and 1110 t respectively. The number of licences in 1994 in each LFA was 712 (23),

631 (24),865 (25), 754 (26A) and 241 (26B) (Lanteigne and Mallet, 1995). Although lobster fishers often

have fishing licences for other species, it can be assumed that the lobster fishery would represent the

biggest proportion of their income.

The lobster fishery in the southern Gulf of St. Lawrence is managed in the following five LFA ; 23,

24, 25, 26A, 26B (Fig. 1). Each LFA has different management regulations such as season, minimum

carapace size and number of traps allowed by fisher (Table 1-3) .

. To monitor population dynamics and interregional biological variations, a sea sampling program

was initiated in the southern Gulf of St. Lawrence in 1983. Until 1988, sea samples were taken randomly

on commercial lobster vessels by the Department of Rsheries and Oceans (DFO) Science Branch .

personnel. In 1989, the sea sampling program was modified to target specific sites or reference ports in

each LFA. This report summarizes sea sampling data collected between 1989 and 1994 at four reference

ports in LFA 24.

MATERIALS AND METHODS

Between 1989 and 1994, sea samples were taken at four reference ports in LFA 24 (Tignish,

Malpeque, Tracadie Bay and North Lake, P.E.I. , Rg. 1). These ports were chosen as sites representing

the surrounding area in term of fishing characteristics.

The sixty day lobster season was broken down into three sampling periods, the beginning (day 1

to 20), middle (day 21 to 40) and end (day 41 to 60) (Table 4). At each site, DFO personnel conducted a .

one day samplingprocedure on board commercial lobster vessels two to three times during the fishing

season (one sample per period).

A standard sampling protocol was used for all samples. The carapace length (Rg. 2) of all lobsters

•

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2

in the trap was measured and recorded down to the nearest mm using calipers. The sex, claw status

(missing or regenerated), visual index of eggs development on ovigerous female lobster (black, tan to

brown and hatching), shell condition (soft or hard) and the numbers of traps fished were also recorded.

Information on fishing location (Loran Cor lat.- long.), water depth, surface and bottom water temperature

were also noted as well as climatic conditions such as wind direction, wind speed, wave height, air

temperature and cloud cover .

Data from the four reference ports were analyzed by period of the fishing season (beginning,

middle and end). The results are presented in four sections: 1 - carapace size frequency distributions of

males, females and ovigerous females lobster; 2 - catch ratio of male, female and ovigerous female; 3-

catch composition (% of sub-legal, canners and markets as defined bellow); and 4 - cumulative catch per

1.58 mm (1/16") size class.

The size categories used in this report are:

sub-legal: all lobster smaller than the legal minimum carapace size for that year as

indicated in Table 2;

canner size: fixed at the legal minimum carapace size for that given year as indicated in

Table 2, to the market size;

market size: 81 .0 mm and greater.

The graphic representation of the cumulative catch for the sampling day was obtained by transforming

carapace length (mm) into lobster weight (g) using the following allometric equation (Maynard et aI. 1992):

1) male: 0 .00140744 x C.L. 2.8675

2) female: 0.0031 xC.L. 2.6838

Therefore, it is assumed that the size distributions obtained during the sea sampling are a true

representation of the catch size distribution.

RESULTS

Size frequency distributions observed at sea for male, female and berried female lobsters at the

beginning, middle and end of the fishery season in Tignish, Malpeque, Tracadie Bay and North Lake,

P.E.1. are presented in Rg. 3 to 10. The catch composition (sub-legal, canner and market) and the catch

3

ratio (male, female and ovigerous female) for the same three periods and four reference ports are

presented in Fig. 11 to 15. Cumulative catch per 1.58 mm (1/16") size class are presented in Fig .16 to 19.

DISCUSSION

The sampling protocol established in 1989 does not consider certain aspect of lobster biology

and characteristics of a trap fishery such as:

1- Multiple recaptures of sub-legal size lobsters and berried females over the fishing season,

which may causes an overestimation of the quantity of these categories;

2- Trap selectivity due to the different trap types and escape mechanisms used could

influence the catch ability of lobster between samples from the same ports;

3- Yearly composition of the size frequency distribution will be influenced by any minimum

carapace size increase as indicated in Table 2.

ACKNOWLEDGEMENT

The authors would like to thank all the fishers from lobster fishery Area 24 who provided space

aboard their vessels and assistance to DFO personnel when conducting sea samples. To Don Jones of

the Department of Fisheries and Oceans who performed sea sampling in Prince Edward Island. Thanks

also to Dave Gillis of the Prince Edward Island Department of Agriculture, Rsheries and Forestry who hired

summer students for this program. Special thanks to Don Maynard who initiated this sea sampling program

and to Marcel Hebert, Claude Leblanc and Mikio Moriyasu from the Department of Rsheries and Ocean

who made corrections to this manuscript.

REFERENCES

Lanteigne, M. and P. Mallet. 1995. Southern Gulf of St.Lawrence Lobster Rshery -1994 Summary Sheets. Can. Ind. Rep. Rsh. Aqat. Sci. 232 : 14p.

Maynard, D., F. Savoie, W. Landsburg, G. Roach and E. Wade. 1992. The Cape Breton experiment on legal minimum lobster size increase: An intermediate report. Can. Atl. Rsh Sci. Adv. Comm., Res. Doc. 92/64: 47p.

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Table 1.

LFA

23

24

25

26A

26B

4

Dates of lobster fishing seasons*, trap limits and minimum carapace size by lobster fishing area (LFA) in 1994 for the southern Gulf of St. Lawrence (Maritimes Region).

Fishing seasons Trap limits Minimum carapace size

May 01 to June 30 375 66.7 mm

May 01 to June 30 300 63.5 mm

August 10 to October 10 250 66.7 mm

May 01 to June 30 300 65.1 mm

May 01 to June 30 300 70.0 mm

* fishing season are modified according to ice conditions, the dates presented in the table are those stated in the Atlantic Regulations (101).

Table 2 . Year of legal minimum carapace size change by lobster fishing area (LFA) in the southern Gulf of St. Lawrence (Maritime Region).

Minimum carapace size LFA 63.5 mm 65.1 rrrn 66.7 mm 68.3 mm 70mm

23 1957 1990 1991

24 1957

25 1957 1990 1991

26A 1957 1991

26B 1957 1987 1988 1989 1990

Table 3 The opening and closing dates of the lobster fishing season for each lobster fishing area (LFA) between 1989 and 1994.

YEAR LFA23 LFA24 LFA25 LFA 26A LFA268

1989 April 29-June 30 April 29-June 30 Aug. 9-0ct. 10 April 29-June 30 April 29-June 30

1990 April 30-July 7 April 3~-June 30 Aug. 9-0ct. 10 April 3~-June 30 April 3~-June 30

1991 May 1-June 30 May 6-July 1 Aug. 8-0ct. 8 May 3-July 3 May 6-July 3

1992 May 4-July 4 May 14-July 6 Aug. 6-0ct. 7 May 14-July 6 May 16-July 8

1993 May 7-July 6 May 10-July 6 Aug. 10-0ct. 11 May 5-July 5 May 5-July 5

1994 May 5-July 6 May 1-June 30 Aug. 10-0ct. 11 May 1-June 30 May 1-June 30

5

Table 4. Dates of lobster sea sampling between 1989 and 1994 for the reference ports in LFA 24. The number of traps sampled for each sample are indicated (N).

Port Period 1989 1990 1991 1992 1993 1994

Tignish, P.E.1. Beginning No sample May 4 May 17 May 26 May 20 May 20 (N=235) (N=83) (N=142) (N=288) (N=1 81)

Middle No sample June 6 June 11 June 9 No sample No sample (N=129) (N=185) (N=152)

End No sample June 28 June 28 July 1 June 25 June 29 (N=72) (N=122) (N=228) (N=278) (N=191 )

Malpeque, P.E.1. Beginning May 2,11,15,18 May 8,17 May10,21 May 27 May 19 May 17 (N=430) (N=119) (N=146) (N=137) (N=274) (N=)

Middle May 24,31 June 13,14 June 13 June 5 No sample No sample June 7 (N=360) (N=122) (N=194) (N=156)

End June 17,22,23,26 June 20,29 June 20,26 July 6 June 22 June 28 (N=327) (N=121 ) (N=266) (N=212) (N=209) (N=295)

Tracadie Bay, P.E.1. Beginning May 3 No sample May 24 May 28 May 18 May 13 (N=291) (N=63) (N=115) (N=250) (N=194)

Middle May 23,30 No sample June 7 June 4 No sample No sample June 8 (N=760) (N=155) (N=94)

End June 16,23 No sample June 22 June 25 June 17 June 24 (N=467) (N=62) (N=230) (N=212) (N=256)

North Lake, P.E.1. Beginning No sample No sample No sample May 23 May 26 May 10 (N=82) (N=62) (N=114)

Middle No sample No sample May 31 May 29 June 5 No sample June 11 June 2 (N=214) (N=204) (N=143)

End No sample No sample June 18,24 July 4 June 21 June 21 (N=292) (N=107) (N=105) (N=246)

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Figure 1. Lobster fishing areas (LFA) in the southern Gulf of St. Lawrence and reference ports in area 24.

• reference port

0)

7

~ C.L.

Figure 2. Lobster carapace length (C.L.) as measured during sea sampling .

•

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8

70

60

50 C 40

30

20

10

0 40

Figure 3.

8 60 1991 Male Female

N=237 N-242 50 A '=65.47 .'-65.09 40 SO=6.74 SO=5.80

30

20

10

60

Male Female 50 8 N=225 N=218 ,-65.29 ,, =65.67 40 SO=7.10 SO=8.5

30

20

10

72 80

60

50 Male Female C N=185 N=198 40 ' =61.85 .=61.51 SO=6.75 SO=6.40 30

20

10

Male Female N=250 N-217

·.=66.80 ' -66.24 SO-6.95 SO=6.08

Male Female N-180 N=225 .-63.59 ,=64 .00 SO-6.37 SO-6.51

88 96 104 112

Male Female N-212 N=244 . =62.60 x=60.9 SO=7.19 SO-5.41

120

60

60

50 8

40

30

20

10

60

50

40 C 30

20

10

Male Female N=290 N-375 '=65.50 ' -64.29 SO- 7.73 SO=5.70

Male Female N=224 N-268 ' =65.65 ' =62.87 SO-7.92 SO-6.42

Male Female N=262 N- 296 ' =6 1.23 '=61.33 80=4 .66 SO=5.01

48 56 64 72 80 88 96 104 112 120

Male Female N-354 N=415 '-63.95 , -62.59 SD=6.87 SO=6.27

No sample

Male Female N=330 N=468 ' =65.15 '=62.8 1 80=8.41 SO-4.64

96 104 112 120

90

80

70

60

50

40

30

20

10

90 80

70

60

50 40

30

20

10

0

1994

8 No sample

c

Mal. Female N-297 N-427 .-63.9 . -62.93 SO-6.11 SO-5.08

96 104 112 120

Male Female N=299 N=395 .-62.75 '-60.13 SO-7.04 S0-4.45

48 56 64 72 80 88 96 104 112 120

Carapace Length (mm)

Lobster size frequency distribution for sea samples taken from 1990 to 1994 at the beginning, middle and end of the fishing season in Tignish, P.E.1. (Area 24) Male _ Female 0

100

1990 90 80 A 70 60 50

40 30 20 10

0 40

40

35

30 B 25

20

15

10

5

40 35

30 C 25

20

15

10

5

0

40 48 56 64

......... ~ 30 0

1993 >- 25 (.) A c: 20 (]) ::J 15

0-(]) 10

'-I..L..

0

B

30

25

20

15

10

Figure 4.

9 li N-S

N-2 1991 1992 1I $~~~'b $~boO A A 21

:!I No berried female 15

\0

0 4 48 56 64 72 80 88 96 1

25 35 N=10 N-17

N=22 30

$~U~ 20 B §~~)1 B §~~1,\

25 15 20

25 35

N=lO N-23 30 N=53

§-g,1~~ 20

C .=72.17 §g%~~ SD-4.07 25 C 15 20

10 15

10

72 80 88 96 104 112 120

35

1994 N-7 30

N-S

$~~~1 . =71.17 25 A SD-4.62

20

15

10

B No sample No sample

35

N-81 30 N-26

§~~~~ 25 C §g~~ 20

15

10


Berried female lobster size frequency distributions for sea samples taken from 1990 to 1994 at the beginning, middle and end of the fishing season in Tignish, P.E.1. (Area 24).

•

•

•

• B

20

15 10 5

0 40 48 56 64 72

45 40

Figure 5.

10 45 45 40 1990 40 1991

Male Female 35 A Male Female 35 N-684 N'8,5 N-218 N- 'es , =69.08 ,=57.4 30 , ,68.3 , =55.00 30 A 50-7.52 50- 5.35 25 50=7.38 50-5.95 25

20 20 15 15

Male Female N-355 N-505 B No sample ' =64.59 . =64 .95

B No sample 50=7.55 SO=7.05

80 68 96 '04 112 120

40

Female 35 35

Male Male Female N-seO N- 460 30 N-220 N-289 30 "55.74 .=64. 19 25 C

.-67.45 .·65.78 25 C 50-7.88 50-5.30 50-7.65 50-7.71 20 20

15 15

10


Lobster size frequency distribution for sea samples taken from 1989 to 1994 at the beginning, middle and end of the fishing season in Malpeque, P.E.1. (Area 24) Male _ Female ~.

Male Female N=405 N-503 ,=71.01 , =58.14 50=7.39 50-5.27

Male Female N=395 N=309 x-72. 16 '-66.80 50=10.1250=5.34

~ 0 -...,.;

>. (,) C Q) ::J 0-Q) ~

LL.

11

1989 50

1990 50 45 N=14 1991 N=42

A N=70 40 A 40 §c1=5Y,% §D~~W4 35 §D6..~¥4 A 30 30

20 20 15 10 10 5

0

25 50 50 45 N=38

20 N=103 40 §Ds,,~:lf, 40 N=38

§D6=~9ih 35 B B §~~Y,~

15 30 30 25

10

50 50 45 N=10 40 N=2

N=81 C 40

§c7:°4~9 35 §D6=~ .83 C §DW~'ll 30 30

25 20 20 15 10 10 5

0 4 56 64 80

40 1992

35

35 N=48 1993 N=37 N=ll 30

30 A §~5~~ A --7~i7, §c1='41!i3 25 §O= . 4 25

20 20

15 15

10 10

5

40

35 N=88 30 B §c1=~~ B 25 B 20 No sample 15 No sample 10

5

40 35 40

35 N=5 30 N~76 35 N~58

30 §c1=<>S~4 25 ~c1-~~ 30 §D~92 C C C 25

20 25

20 20 15

15

10 10

o~~~~~~~~~~~~~ 40 48 56 64 72 80 88 96 104 11 2 120

Figure 6.


Berried female lobster size frequency distributions for sea samples taken from 1989 to 1994 at the beginning, middle and end of the fishing season in Malpeque, P.E.1. (Area 24).

•

•

.-... ~ 0

>-() c: Q) :::J 0-Q) ~

LL

35 1989 25

20

15

10

40

35 30

25 20

15

10

40

35

30

25

20

15

10

5

35

30

25

20

15

10

A

B

C

1992 A

MaJe Female N:213 N:301

Male N: 734 x=64.99

. :65.31 50-6.77

Female N-l009 .:83.63

50·7 .24 50=6.62

Male Female N=452 N:666

Male Female N:135 N:220 ':65.54 ' =66.2 50-6.22 5 0-8.49

Male Female N=314 N- 372 '·64.72 0-65.69 5 0 -7.26 5 0-6.79

Male Female N=258 N=341 ' =63.03 , ·62.17 50-6.74 50=6.56

48 56 84 72 80 88 96 104 112 120

50 45

40 35 30 25

12

1990 A

No sample

B No sample

C

No sample

1993 A

B No sample

Male Female N-435 N-661 .-65.44 0·65.53 5 0 - 7.44 50-7.82

Mal. Femal. N-555 N=784


70

60

50

40

20

10

70

60

50

40

30

20

10

a

70

60

50

40

40

40

1991 A

B

48

C

1994 A

B

Figure 7. Lobster size frequency distribution for sea samples taken from 1989 to 1994

80 88

Male Female N:212 N-299 ' :66.44 _·67.42 50:5.98 50-7 .08

Male Female N-281 N-383 '-83.52 ' :62.71 50:5.98 50 :6.84

Male Female N-I41 N-173 .=63.52 0=63.38 50:6.29 5 0 =8.31

96 104 112 120

Male Female N-259 N-390 .=66.1 x:64.82 50=6.72 50-6. 11

No sample

Mal. Female N=422 N:585 . :61.18 . :61.75 50-5.15 50·6.87

at the beginning, middle and end of the fishing season in Tracadie, P.E.1. (Area 24) Male _ Female 0

1989

A

30

25 C 20

15

..-. 10

~ 0 5

0 >. 40 48 56 (,) C Q.) ::l 0-Q.)

1992 ... u..

40 A 30

20

10

50 B 40

30

20

10

0 48 6

50

40

c 30

20

10

Figure 8.

1990 A

13

1991 A

No berried female No Sample No berried female

64 72

64

N=15

§~U~

25

B 20 B

N=12

§-g,~~2

No Sample

25

N~8

N=6 C 20

C §-g,~~6 §~~'811 No Sample

15

10

80 88 96 104 112 120 o 10 ' 48 'S6 4 'r.; 10 'g8 96 104 112 120

25 N=13

100 1994 N~1

N=10 1993 §~oo §~%~

90

§~'kk 20 A 80 A 70 60 50 40

30 20 10 0

40 48 56 64 72 60 88 96 104 112 120

N=4

§~~5,3 B No sample B No sample

25 N=18 30 N=12 No9 §~~w, 25 S=69,17

§~~% D=6,IS

C 20

15

10


Berried female lobster size frequency distributions for sea samples taken from 1989 to 1994 at the beginning, middle and end of the fishing season in Tracadie, P.E.1. (Area 24).

•

t

:>. () C (J) ~ 0-(J) .... U-

•

40

35

30

25

20

15

10

5

0

70

60

50

40

30

20

10

70

60

40

40

1991 A

B

1994 A

B

50 C 40

30

20

10

No sample

Male Female N=336 N=399 ' =64.28 ,'=65.78 50=7.35 50=9.27

Male Female N=429 N=584 ' ,63.14 '-64 .27 50=7.44 50=10.34

Male Female N-284 N- 295 . =67.27 ; =66.66 50=6.97 50-6.64

96 104 112 120

No sample

Male Female N=362 N-545 .'=63.84 <=63.43 50-6.63 50-7.69

60

50

60

50

40

30

20

10

0

1992 A

B

14

MaJe Female N=202 N=216 x=68.01 '-6783 50-6.4 7 50=8.86

Male Female N-115 N=189 , =67.70 '-64.3 50-5.99 50=6.30

Male Female N=156 N=172 '=66.21 50-6.31

50 45 1993 40 A 35

30 25 20 15

50 45

B

40 48 56 64 72 80 88 96 104 112 120


Figure 9. Lobster size frequency distribution for sea samples taken from 1991 to 1994 at the beginning, middle and end of the fishing season in North Lake, P.E.I. (Area 24) Male _ Female D

Male Female N=96 N=162 '=67.11 '-69.77 50=6.78 50=8.2

104 112 120

Male Female N=182 N=301 ' =65.28 ' =65.36 507.01 50=6.91

Male Female N=210 N=264 , - 65.31 ' =65.88 50=6.95 50=9.04

25

20

~ 0

>-C,.) c 0,) :::l 0-0,) 40 .....

LL 35

30

25

20

15

10

5

0

40

35

30

25

20

15

10

0

40

40

1991 A

B

1994 A

48 56

B

C

Figure 10

No sample

30

N=39 25

~~~~~ B

30 N=72

25 §~~'8%5

20 C 15

N=23

§~%~

No sample

N=58

§~~w,

15

50

40

30

20

10

50 N=5

~~~~~ 40

30

20

10

50 N=21

~&~~~2 40

30

Carapp'ce Length (mm) "

1993 A

B

C

N=29

~~~~~

N=30

§~%~~

Berried female lobster size frequency distributions for sea samples taken from 1991 to 1994 at_the beginning, middle and end of the fishing season in North Lake, P.E.1. (Area 24).

•

I

..Q :::l

C/)

... <I) c: c: ca (.)

ca en <I)

I

..Q :::l en

... <I) c: c: ca (.)

-. .:

Figure 11.

Beginning

1990 N=177

N=295 0.68%

N=9

1991 N=172

44.19%

N=282

N=13 30.77%

50%

16 Middle

N=200

500/.

N=236 3.81%

N=17

N=244 0.82%

N=171 8.19%

N=7

End

N---292

52.40%

N=95

45.26% ~'V"..rv

N=6

N=357

N=115

N=7

%

Percentages of males, females and berried females for sub-legal, canner and market lobster sampled in Tignish, P.E.I. between 1990 and 1994. Male II1II Female ~ Serried

... 4) C c m (.)

I .Q ~ !II

... 4) C c m (.)

Figure 11.

Beginning 1992

N=303

N=357 1.68%

N=11

1993 0.25% N=408

57 .1 1%

1.66% N=361

Cont.

17

Middle

N=269 0.37%

N=232 9.050/.

N=13

No sample

16.67%

16.67%

End

N--463 0.43%

N=142

N=6

1.62% N=494

N=361

N~4

•

I

.c :J en

... Q)

c:: c:: CIS (J

.' ,

Figure 11.

Beginning 1994

7.41%

Cont.

N=400

N=323

N=7

18 Middle

No sample

61.45%

End

N=560 0.84%

N=146

N=14

Beginning

1 989 2.50%

... G.l C C ctI U

5.3%

3.3%

1990

ctI CI Q) ...

.Q ~

00

... G.l C C ctI U

51 .61%

5.05%

N- 407

N=1071

43.9%

N=124

N=277

N=16

40.2%

19

Middle

1.8"0 N-771

48%

11.4% N=764

5.3% Na 3a

2.05% N=342

N=172

N=12

End

2.7%

49.4%

12.39%

7.8% NaSI

N=197

46.1!W.

1.01% N=199

24.62% r V· V'V' ,

N=18

Figure 12. Percentages of males, females and berried females for sub-legal, canner and market lobster sampled in Malpeque, P.E.1. between 1989 and 1994. Male · II1II Female ~ Berried

•

•

•

... CI.I c:: c:: ~ o

Beginning

1991 N=184

1.09%

67.93%

5.43% N=700

51.14%

2.99% ~7

1992

CI:I Cl CI.I ""'i .Q :::J

(/)

... CI.I c:: c:: ~ o

Figure 12.

N=402 1.00%

55.47%

N=707 6.08%

N---56 1.79%

Cont.

20

Middle End

N=272 N=274 1.47% 0.36%

N=428 10.68% 2.10%

5.98%

14.29% N=7 N=39

N=501 N=545 1.40%

N=407 N=459 1.09%

N=43 N=41 9.300/.

I

.c ~ en

'-Q) C C t'CJ o

t'CJ 0) Q)

I

.c ~

CI)

'Q)

C C t'CJ o

Figure 12.

Beginning

1993 N=271

1.11%

N=611 5.05%

N=76 3.95%

1994 N=129

N=499 2.00%

N=47 2.13%

Cont.

21 Middle

No sample

No sample

52.61%

End

2.53%

2.37%

0.94%

N=237

N=316

N=34

N=211

N--445

N=106

•

•

Figure 13.

I

.Q ::l en

... Q)

C C ca ()

-. Q)

~ ... ca

':i

Beginning

1989 58, 1%

59,6%

1990

61.1 %

N=312

54,5%

22

Middle

1.6%

6,090/.

N=907

N=818

No sample

62,36%

54 .8%

14,3%

End

0.40% N=701

0,5% N=416

14.3% N=7

Percentages of males, females and berried females for sub-legal, canner and market lobster sampled in Tracadie, P.E.1. between 1989 and 1994. Male _ Female ~ Berried

~ .

Q) C C ca (J

Beginning

1991

59.15"10

1992

~

Q) C C ca (J

-Q) ~ ~

ca :i .

Figure 13.

4.35%

Cont.

N=185

N=306

N=21

N=143

N=207

Nz15

6.67%

6.67%

23 Middle

N=444 0.23"10

N=219 4.57"10

N=13 7.69"10

N=311

N=359 1.11"10

N=2O

End

N=221 0.9()<>10

N=90 5.560/.

N=11 9.09%

N=383

N=207 4.19%

N=15

... Q)

c: c: C'CI

. (J

Beginning

1993

1.52%

60.71%

6%

1994

c; Cl Q) -; .Q ::l en

... Q) c: c: C'CI (J

Figure 13.

64.07%

0.25%

58.46%

Cont

N=467

N=593

N=50

N=231

N=17

24

Middle

No sample

No sample

End

0.25%

N=529 2.27%

1'F32 12.5%

1'F769 0.39%

N=240 3.75'%

N=11

Figure 14.

iij Cl Q) ""i ..c ~

C/)

...

Beginning

1991

Q)

c: c: No sample co (.)

ca Cl Q) ""i ..c ~

C/)

... Q) c: c: co (.)

-Q) .l:iI: ..... :i

1992 N=124

N~81

3.20%

N~3

25 Middle

N=359 0.28%

N=376

N=43

55.81 % ~A.f'~'

N=139 0.72%

N-168 2.38%

End

N=667 0.75%

N=345

N=78

N=155

N=177 9 .040/ •

N=19

Percentages of males, females and berried females for sub-legal, canner and market lobster sampled in North Lake, P.E.I. between 1991 and 1994. Male l1li Female ~ Berried

•

.... Q)

c::: c::: CIS

(..)

-Q) ..liI:: ....

CIS :E

.... Q) c::: c::: CIS

(..)

Figure 14.

Beginning

1993 N=61

3.28%

N=190 6.32%

59.47%

N=22

1994 N=172

0.58%

N=403 4.96%

46.400/.

N=27 7.41%

Cont.

26 Middle

0.47%

9.57%

5.26%

N=211

N=190

N=19

No sample

End

N=251

N=223

N=30

N=594 0.84%

N=337

N=34

1989 Beginning

..c tJI '2 Cl j::

III :::I C' III a. a; ::E

4

>-01 ID III 'is 01 ... E I-

III

"" 5 ..c t: o Z

5.79%

2.15%

60.7%

N=1569

48.53%

N=514

46.53%

Middle End

No sample

2.41% N=1573 4.88%

1.88% N=1758 0.62%

,,~ 51.59%

No sample

N=I045

N=1124

1990 Beginning

..c tJI '2 Cl j::

III :::I g-o. a; ::E

>-01 ID III :c fl E I-

III

"" 5 ..c t: o Z

1.87% N=481

3.8% N=417

66.4%

Middle

3.75% N=453

52.1%

2.28% N=526

48.07% 32.7%

65.02%

No sample

No sample

Figure 15 Percentages of sub-legal, canner and market lobster sampled in Tignish, Malpeque, Tracadie and North Lake, P.E.I. between 1989 and 1994, Sub-legal lflii canner 12.22] market

End

1,53% N=393

N=414

/'IJ .....

1991 Beginning

. N:671

'lil '2 Ol i=

Q> ::I g Dc;; ::Ii:

>-~ Q>

i5 ~ ~

Q> .:.:. j r; t: o Z

7.05%

N=951 7.05%

73.61.%

N=467

4.10%

36.130"

"

No sample

Figure 15. Cont.

Middle End

N=422 1.46% N=479 1.66%

N:588 N:741 1.19% 0.36%

N:422 N:479

4.62% 3.42%

95.38%

N:588 N=741 4.1()cyo 7.16%

1992 Beginning

r; (/)

c C)

i=

Q> ::I g Dc;; ::Ii:

>0-.. aI Q>

i5 .. u

~

Q> .:.:. j r; t:

~

1.64%

53.20%

4.81%

60.69%

4.81%

IllHI'!.

5.37%

N:671

N:1165

N=365

N:428

54.37%

Middle

N:514 2.53%

45.14"10

4.52% N=951

N:690

4.52%

0.65% N:309

44.98%

End

0.98%

3.92%

43.92%

3.92%

541%

50.43%

N:611

75.78%

N=1045

N:608

N:351

I\) OJ

•

-'= til "E DI i=

III :J

I ~

l;' m III '6 B ~

~ j -'= t:: o Z

1993 Beginning

0.90%

7.91%

63.89%

2.360 ..

8 .06%

69.60%

Figure 15

Middle End

N=776 2. 73%

No sample

N=961 5.79%

No sample

53.83%

N=1110 4.50%

No sample

N---273 N=512 3.71 % 5.95%

55.08% 44.25%

Cont.

N=879

N-585

N=1357

N=504

1994 Beginning

-'= til .~

Cl i=

III :J

I ~

iG' m III '6 B l!! I-

~ j -'= t:: o Z

0.96%

44.25"'0

6.96%

2.62%

4.49%

66.94%

Middle

N=730

No sample

N=675

No sample

N=650

23.53%

No sample

N=602

28.57%

No sample

34.92"10

End

1.94%

58.40%

1.08'Y0

3.52%

N=720

N=762

N=1020

N=965

I\) <0

30 100 100

90 90

80 80 1991 70 1990 70

---0- Begmirg eX seasm N=295

60 60 -- Mid seasC11 N=l78 Begmirg of SeasC11 No<J04

--a-- End of season N=122

50 MidseasC11 N=253 50

End of season ·N~l 01

40 40

30 30

20 20

10 10

a 69 75 81 87 93 99 105 . 111 117 123 129 63 69 75 81 87 93 99 105 III 117 123 129

..-~ 0

100 100 --C 90 90 0

'';:; 80 1992 80 I 1993 CJ) I

0 70 70 I a. ---0- BegimirgeX seasm N=364 I --0-- El<igimirg eX SeasC11 N=368 E 60 --- flljdseasC11N=2245 60

I ___ MidseasC11 N=385 0 I. U

--a-- End of season N- 148 I

50 50 I J:: I U 40 40 I -ro I U 30 30 I

Q) I

,~ 20 20 I - I

ro 10 10 I ~ I

E a ~ 69 75 81 87 93 99 105 111 117 123 129 63 69 75 81 87 93 99 105 111 117 123 129

()

100

90

80 1994 70

--0-- Begrrirg of season N=33J

60 -- flljdseasC11 N~160

50

40

30

20

10

a 63 69 75 81 87 93 99 105 III 117 123 129

Size (mm)

Figure 16. Cumulative lobster catch per 1.58 mm size class at the beginning, middle and end of the fishing season in Tignish, P.E.I. between 1990 and 1994. Vertical line represents the minimum size for market lobsters.

r I

31 100 100

90 90

80 80

70 1989 70 1990 60 Begmrg of seas()1 N=1002 60 Begmirg of seas()1 N=293 ---a-- ---a--

50 -- Midseason N=802 50 -- Mid season N=l84 ---- End of season N=569 ---- End of season N=217 40 40

30 30

20 20

10 10

0 0 63 69 75 81 87 93 99 105 111 117 123 129 63 . 69 75 81 87 93 99 105 11 1 117 123 129

--~ 0 100 -- 100

C 90 90 0

:t::: 80 1991 80 1992 U)

0 70 70 Q. Beginning of season N= 767 ---a-- Begmrg of season N= 763

E 60 Md season N=316 60 -- Midseason N=448

0 61d of season N=467 ---- End of season N=500 (,)

50 50

..c (,) 40 40 ...... cO (,) 30 30

Q) 20 20 > :;::;

cO 10 10

:::J

E 0 0

:::J 63 69 75 81 87 93 99 105 111 117 123 129 63 69 75 81 87 93 99 105 111 117 123 129

()

100 100

90 90

80 1993 80 1994 70 70 Begimrg of seas()1 N=546

---0-- 8egi nni ngof season/lF687 --a--

60 61d of season N=350 60 ----4-- End of season N=551 ---50 50

40 40

30 30

20 20

10 10

0

69 75 81 87 93 99 105 111 117 123 129 63 69 75 81 87 93 99 105 111 117 123 129

Size (mm) • Figure 17. Cumulative lobster catch per 1.58 mm size class at the beginning, middle and end

of the fishing season in Malpeque, P.E.1. between 1989 and 1994. Dotted vertical line represents minimum carapace size for market lobsters.

100

90

80

70

60

50

40

30

20

10

a 63 69 75 81

.-~ 0

100

C 90 0 ...... 80 (J)

0 70 Q.

E 0

60

U 50

~ U 40 ...... CO U 30

<1> 20 > '';::::; CO 10

~

E ~ 69 75 81

()

100

90

80

70

60

50

40

30

20

10

a 63 69 75 81

Figure 18.

•

32

1989 1990 ~ Begimi rg of seasoo N=323 --- Midseason N=851

--a-- End of season N=423

No sample

87 93 99 105 111 117 123 129

100

90

1991 80 1992 Beginning of sease n N=326

70 ~ Be;jmrg of season N=222

Md season N=232 --- MidseasonN=379 60

End of season N=101 --a-- End of season N=225

50

40

30

20

10

a 87 93 99 105 111 117 123 129 63 69 75 81 87 93 99 105 111 117 123

. . . . . . . . 100

90

1993 80 1994 70 Be;jmrg of seasoo N=419

--0-- BeQinningof seasonN=642 ~

60 --- Midseason N=250 --- Beginning of season N=561

50

40

30

20

10

a 87 93 99 105 111 117 123 129 63 69 75 81 87 93 99 105 111 117 123

Size (mm)

Cumulative lobster catch per 1.58 mm size class at the beginning, middle and end of the fishing season in Tracadie, P.E.1. between 1989 and 1994. Dotted vertical line represents minimum carapace size for market lobsters .

129

129

33

100 100

90 90

80 80 1992 70

-0-- Mel season N=419 70 -0-- Be;jrnirg of season N=I304

60 -- End of season N=423 60 -- Mdof seasonN=I70 --- End of season N=1196

~ 50 50

0 40 40

C 30 30 0 :<.::::::

20 20 (J)

0 Cl. 10 10

E 0 0 0 0 63 69 75 81 87 93 99 105 III 117 123 129 63 69 75 81 87 93 99 105 111 117 123 129

..c 0 lao lOa ...... CO 0 90 90

Q) 80 1993 80 1994 > . .;=

CO 70 70 :::J --0- Beginning 01 Season N= 211 -0-- Begimirg of season N=43O

E 60 • Mid Season N=301 60 -- End of season N=371

:::J a End 01 Season N=253 () 50 50

40 40

30 30

20 20

10 10

0 o -63 69 75 81 87 93 99 105 III 117 123 129 63 69 75 81 87 93 99 105 III 117 123 129

Size (mm)

Figure 19. Cumulative lobster catch per 1.58 mm size class at the beginning, middle and end of the fishing season in North Lake, P.E.1. between 1991 and 1994. Vertical line represents minimum carapace size for market size lobsters.

•

t

iiiillir' - dfo-mpo.gc.ca · • figure 8. rgure 9. figure 10. figure 11. rgure 12. figure 13....

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