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FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 1: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 2: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 3: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

cor{TEt{Ts

I I

I t t

INTRODUCTIOT{

T{ETHOI}S

RESULTS

Page

5

5

6

A )B )c )D )a )F )G )H )r )J )

K) ,r )M )

u)

Catch anal Ef for t Data 6l ' lean Size 7NuDber of Boats 7Folecast of 1972/73 Recru i tDent 7Int roaluct ion of Nev Legis ] .a t ion 7E f f e c t s o f N e r L e g i s l a t i o n 8Innovat ions to Boats anal cear 9Baf t gDist r ibut ion of F ish ing 1OAverage NuDber of Days l torked pe!boat per l to t th 10Pr ice of Rock Lobsters 10l tarket Trenals and EconoDic Factors 10Average i la lue per Pot on BoatTransferSea l la ter TeDperatures andS a l i n i t i e sSpawning Rock Lobste lsSex Rat ios

o )P )

1 1

1 1I 1T 2

IV

vD I SCUSS I0N

ACKNOWLEDGEI'IENTS

t 2

1 3

REFERENCES

Page 4: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 5: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

I .

PLATES

( C e n t ! e P a g e s )

A modern bont lwooal Rock Lobster Boat .

2 . An old le! type of carvel p lanket l Rock Lobster Boat

Rock Lobster Boat sbowing large tleck space atrdpot r inch

4 . A b a t t e n p o t .

5 .

6 .

A s i re beehive pot wi th bai t basket .

A loaal of cane beehive pots.

3 .

Page 6: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 7: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

I I I RESULTS

A . C a t c h a n d E f f o r t D a t a

l h e f i s h i n g s e a s o n e x t e n d s f r o n 1 5 N o v e m b e r t o 1 4 A u g u s ta n d m a y b e s u b d i v i t l e d i n t o t h r e e a l i s t i n c t p h a s e s v i z . ( i )t h e " w h j . t e s " f i s h e r y ( c e o l g e , 1 9 5 8 ) w h i c h b e g i n s s u d i l e n l yi n l a t e N o v e m b e r ( a s p a l e - c o ] . o u r e d n e w l y - m o u l t e d r o c kl o b s t e r s l e a v e t h e s h a l l o w r e e f a r e a s ) a n c l a r b i t r a r i l yf i n i s h e s o n 3 1 D e c e m b e r , ( i i ) t h e " c o a s t a l r e d " f i s h e r y ,whi -ch begins on 1 January and end,s on 14 August anal ( i i i )t h e A b r o l h o s I s l a n d s f i s h e r y w h i c h i s o p e n f r o n 1 5 M a r c hto 14 Augus. t .

t t L972 the "whi tes" run coumenced on about 23 November inb o t h n o r t h e r n a n d s o u t h e r n a r e a s w h i c h i s a b o u t t h e a v e r a g et i [ e b u t a f e w d a y s e a r l i e r t h a n t h e p r e v j . o u s s e a s o n .C a t c h e s a n t l e f f o r t ( i n n u m b e r o f p o t l i f t s ) w e r e a s f o l - 1 o w s :

"whi tes I ' catch" l { h i t e s " e f f o r t" C o a s t a l R e d s " c a t c h" C o a s t a l R e d s " e f f o r t =A b r o l h o s c a t c hA b r o l h o s e f f o r t

s , 8 8 7 , 5 O 0 l b s .2 , 5 3 5 , 6 0 0 p o t l i f t s .6 . 31f,9 oo rus .5 , 2 7 L ; 1 9 5 p o t I i f t s .2 ,1 t5 ,173 rbs .I , 3 2 9 , L 4 5 p o t l i f t s .

T o t a l C a t c hT o t a l E f f o r t

= L4,97c l )3 j tus.= 9 , 1 3 5 , 9 4 0 p o t l i f t s .

I h e s e f i g u l e s i n c l u d . e a s m a l l a B o u n t o f f i s h i n g i n e x t r e m en o r t h e ! n a n d s o u t h e ! D a r e a s a n d h e n c e c l i f f e r s l i g h t l y f r o nt h e f i g u r e s s h o w n i - n T a b l e s I a n d l 2 . A l s o , t h e s e f j - g u r e s d on o t i n c l u d e " c a s h " s a l - e s ( i . e . r o c k l o b s t e r s w h i c h a r e s o l a lf o r c a s h a n d a : c e n o t r e c o r d e t l i n t h e f i s h e r m a n ' s x n o n t h l yr e t u l n s o f c a t c h e s ) t o t a l l i n g a p p r o x . 1 , 0 0 0 , 0 O 0 l b s . , o ra m a t e u r c a t c h e s f o r w h i c h e s t i m a t e s h a v e s o f a r n o t b e e no b t a i n e a l . F i g u r e 1 s h o w s c o m p a r a t i v e c a t c h , e f f o r t a n dc a t c h p e r e f f o r t a l a t a f r o E p r e v i o u s y e a r s .

C a t c h a n d e f f o r t d a t a f r o m v a r i o u s s t a t i s t i c a l b l o c k s( F i g u t e 2 ) a r e s h o w n i n T a b l e I w i t h c a t c h e s e x p r e s s e d i - n

p o u n d s r r e i g h t a n d e f f o r t a s n u m b e r o f p o t l i f t s . T a b l e 2s h o \ r s c a t c h p e r p o t d a t a f o ! t h e s a m e s t a t i s t i c a l b l o c k s .U s i n g t h e m e t h o d o f c u l l a n a l ( 1 9 6 9 ) t o c a l c u l a t e e f f e c t i v ef i s h i n g i n t e n s i t y w i t h e a c h m o n t h ' s e f f o r t i n p o t l i f t s b e i n gw e i g h t e a l a c c o r d j . n g t o t h e l e l a t i v e c a t c h a b i l i t y i n t h a t

Page 8: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 9: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

2 .

6 .

A s f r o D 1 5 N o v e m b e r 1 9 7 2 , t h e e s c a P e g a P s i z e w a s

inc leased f rom 2 inches (51 m0) to 54 mm an' l the

escape gap had to a lso conply s i th sPeci f icat ions! e g a r a l i n g c o n s t r u c t i o n .

A s f r o m I F e b r u a r y l 9 ? 3 , t h e t a k i n g o f r o c k l o b s t e l s

b y m u l t i - n e c k e d P o t s w a s p r o h i b i t e d . T h i s r e g u l a t i o n

vas in t loduced in lesPonse to the increasing usage

of large, mul t i -necket l Pots sh ich sere found, to catch

m o r e e f f i c i e n t l y t h a n t h e c o m n o n l y u s e t l P o t s .

A s f l o m I J a n u a r y 1 9 7 3 , t h e m i l e c l o s u r e r e g u l a t i o n ,

rb ich prohib i te i l f ish ing wi th ln one n i le of the shore

a f t e r I i l a n u a r y e a c h y e a r ' w a s r e s c i n d e d . I t h a d

been agreed that ' wi th the in t roaluct ion of the larger

e s c a p e g a p , t h i s ! e g u l a t i o n , w h i c h w a s o r i g i n a l l yi n t r o d u c e d t o P r o t e c t t h e u n d e r s i z e r o c k ] . o b s t e r s i n

s h a l l o w v a t e r s , r t a s n o l o n g e r a p P r o P r i a t e .

A s f r o s r 4 M a y 1 9 7 3 , t h e t a k i n g o f r o c k l o b s t e r s b y

a n y p e r s o n ( a m a t e u r o ! p r o f e s s j - o n a l ) b y n e a n s o f

s p e a r g u n s , h a l P o o n s , I l a w a i i n s l i n g s , g i a l g j - e s a n d a l I

o thet pointed j .nst ruments r tas prohib i te t l . This was

i n t r o d u c e d i n o r d e r t o l i n i t t t r e e f f e c t i v e n e s s o f t h e

i n c r e a s i n g n u m b e r o f a m a t e u r f i s h e r m e n w h o w e r e t a k i n g

r o c k l o b s t e r s .5ev€rv MtcE gencq

Trro areas, one at eEEEEH and one at i tur ien Bay,

w e r e c l o s e d t o t h e t a k i n g o f r o c k l o b s t e r s a s t h e y

w e r e a r e a s i n \ t h i c h t h e c s l R o r e s e a r c h t e a m w a s c o n -

t l u c t i n g r e s e a ! c h u p o n j u v e n i l e r o c k l o b s t e r s .

I n f o r m a t i o n r e g a r t t i n g t h e s e c h a n g e s t o t h e l e g i s l a t i o n g o v e r n -

i n g t h e r o c k l o b s t e r f i s h e r y , a s w e I I a s t h e D e p a r t m e n t o f

F i i h e r i e s a n t l t l i l a t l i f e ' s p o l i c i e s o n v a r i o u s i s s u e s , m a y b e

f o u n d i n t h e f o l l o l t i n g v o l u m e s o f t h e F i s h i n g I n d u s t r y N e w s

s e r v i c e ( F . 1 . N . s . ) : - v o l . 4 ( 1 9 7 1 ) P p - 3 , 2 9 , 4 A ' 6 6 , 7 O '

v o 1 . 5 ( 1 9 7 2 ) p p - 2 , 3 , 2 0 , 3 0 , 3 1 ' 4 6 , 4 7 , 6 4 ' 6 6 , 7 L .

F . E f f e c t s o f N e r t L e g i s l a t i o n

D u r i n g t h e y e a r , t h e t \ r o m a j o r c h a n g e s i n t h e ] ' e g i s l a t i o ng o v e r n i n g t h e f i s h e r y m a d e w e r e :

t h e a b o l i t i o n o f t h e " n i 1 e l i n i t " ( 8 . 4 a b o v e ) a n d

t h e i n c r e a s e i n e s c a p e g a p s i z e ( 8 . 2 a b o v e )

4 -

i

I .

Page 10: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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tcor ezTs.zapun 'aTTua^ng Jo s:aqEnu raTTP[rs If?I{6TTs aq? 01osTp lnq (€9.6T ,uarog) aIE6 adpcsa aq? Jo lcafJa 6uTlros oq1 01

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pauTutpxa aq treE ezTs alp6 adpcsa uT es?arcuT aql Jo lcaJfa aI{J,

' (ATa^Tlcadlser g'T pup 9'T) aTurTT aTru aq1 opTslnopup apTsuT qloq rPTTuTs sEn sq?uou TTP :of spare TlP :oJ:

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lou 3rE ?TurTr arTu pTo aq1 aPTslno pue apTsuT sezTs uPsulaq1 1pql 1ua:edde sEaes 1T 'E aTqeI to uoT?puT{rpxa u? uorg

L

Page 11: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

georgi .anuel and cat t le hocks, or herr ing and cat t le h i t les.sat -Bon (Anr ip is t "ut ta l heads decl ined in popular i ty due to

. t h e i n c r e a s i n g p r i c e a n d l o r e r e d a v a i l a b i l i t y . l l o w e v e r ,sa lmoD heads and hocks or sa lmon heads and cat t le h ide werest i1 l popular baj - t . o ther whole f ish sucb as Bony herr ing( F l u o i a l o s a o l a t n i . n g h i ) , n u 1 l e t ( I t l u g i , L e e p h a l u s ) , m u l i e sl S a r d i n o p s n e o p i l c h a r d u s ) , e t c . w e r e a l s o u s e a l i n b a j - tb a s k e t s . P i e c e s o f c a t t l e h i d e b e c a D e i n c r e a s i n g l y p o p u l a rdue maj-n ly to the Ior prJ-ce, reaaly avai lab i l i ty and goodl a s t i a g q u a l i t i e s .

I . D i s t r i b u t i o n o f F i s h i n g

T h e c l i s t r i b u t i o n o f f i s h i n g i s s h o w n i n f a b l e l . t h i sd e m o n s t l a t e s h o w , a s u s u a l , t h e m a j o r i t y o f e a r l y s e a s o nf ish ing (Novenber - December) was concentratec l in sha] . loww a t e r ( B l o c k s 2 8 1 4 , 2 9 ! 4 , 3 0 1 4 , 3 0 1 5 , 3 1 1 5 ) a n d h o w , p r o b a b l ya s a r e s u l t o f p o o r w e a t h e r c o n d i t i o n s , f j . s h i n g e f f o r t t l e -c l i n e d c o n s i d e r a b l y a f t e r . u a y i n a l l a r e a s .

J . A v e l a g e N u E b e t o f D a y s w o r k e d p e r b o a t p e r M o n t h

l"ton ttr N o v D e c J a n ! 'eb March Apr j - 1 Uay June Ju1y Aug

D a y sw o : r k c d f T . 5 2 4 . 7 1 5 . 6 1 6 . 1

T h e a v e r a g e n u m b e !s e a s o n w a s 1 6 . 2 .w a s a c o n t r i b u t i n ge f f o r t i i u r i n g J u n e ,

o f d a y s $ o r k e d p e r m o n t h f o r t h e L 9 7 2 / 7 3T h e b a d w e a t h e ! d u r i n g t h e w i n t e r m o n t h sf a c t o r t o t h e r e l a t i v e l v l o w l e v e l o f

. l u l y a n d l A u g u s t .

R o c k L o b s t e r s

L 9 - 4 L 9 . 7 1 5 . 6 1 3 . 3 1 3 . 6 6 . 6

- $ 1 . 2 0 p e r l b . , ( w h o l e w e i g h t )

- 9 A 3 . 3 7 p e r 1 b . ( t a i l i { e i g h t )

K .

P r i c e t o

w h o l e s a l e

P r i c e o f

f i s h e r r n e n $ 1 . 0 0

N e w Y o r k p r i c e $ A 3 . 0 3

L . l l a r . k e t T r e n d s a n d E c o n o m i c F a c t o r s

A g a i n t h e m a j o r i t y ( 9 9 t ) o f t x o z e n r o c k l o b s t e r t a i l s w e r ee x p o r t e d t o t h e U . S . A . T h e d e m a n d f o r w h o l e r o c k l o b s t e ri n c r e a s e d s u b s t a n t i a l l y ( b y 1 5 7 c ) o v e r t h e p r e v i o u s y e a r w i t ht h e n a j o r i t y b e i n g e x p o r t e d t o F r a n c e ( 4 8 t ) a n a l J a p a n ( 3 o g ) .H o l d i n g s o f f r o z e n r o c k l o b s t e r t a i l s i n t h e u . s . A . d e c r e a s e ds I i g h t l y .

l 0

Page 12: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

T1

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Page 13: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

80 DD at Jut ien Bay, 96 mm at l rancel iD and 95 ua at F lerant le .Suf f ic ient data on the propol t io ! o f breeal ing feDales totota l females above the qean s ize at f i rs t breeal ing ras nota v a i l a b l e f o r t t r e L 9 7 2 / 7 3 s e a s o n , b u t w i l 1 b e c o l l e c t e d l i Df u t u r e y e a r s .

sex Rat iosP .

The sex rat io of rock lobste ls taken by conDelc ia l pots r rascalcu lated f rom tbe iDformat ion gatheleal f roB the catchDoui to l ing progranme ancl is shown in Table 6. There wasu s u a l l y , b u t n o t a L u a y s , a n i n c r e a s e i n t h e p e r c e n t a g e o ff e n a l e s y i t h a l e p t h , p a r t i c u l a ! I y i n t h e D o n g a r a a r e a .

l v DI SCUSSTON

E o y e n a n d c t t i t t l e b o r o u g h ( 1 9 6 6 ) c a l c u l a t e d t h e s u s t a i n a b l el e v e l o f c a t c h f o ! t h e w e s t e r n r o c k l o b s t e r f i s h e r y t o b e1 6 r 0 0 0 , O 0 0 : 2 r O 0 0 , 0 0 0 l b s . p e r y e a r , a s s u m i n g t h a t r e c r u i t -Bent can be stabi l ized anal that the regulat ions in t roducedi n 1 9 6 3 s e r e e f f e c t i v e i n r e d u c i n g a n t l m a i n t a i n i n g t h e e f f o r ta t a n a c c e p t a b l e l - e v e l . D u r i n g t h e y e a r 1 9 7 2 / 7 3 t h e t o t a Lcatch was wi th i r i th is lange a l though i t was taken by ane f f o r t w h j - c h w a s s o m e 5 O t h i g h e r t h a n t h e L 9 6 4 / 6 5 l e v e l o fe f f o r t . B o w e v e ! , t h e e f f o l t i n L 9 7 2 / 7 3 s h o w e d s o n e d e c r e a s ef r o ] o t h e p r e v i o u s y e a r a n d i t n a y b e t h a t ' u n d e r t h e p r e s e n tr e g u l a t i o n s a n d e e o n o n i c c o n a l i t i o n s , n a x i n u m e f f o r t j - s n o wbeing expenateal by the f1eet .

T h e t r e n d t t o r a r d s i n c r e a s e d e f f i c i e n c y o f t h e f i s h i n g f l e e tc o n t i n u e d i - n I 9 7 2 / 7 3 , a l t h o u g h a r e t u r n t o a v e r a g e w e a t h e rc o n t l i t i o n s a f t e ! t h e e x t r e n e l y $ i l d s e a s o n i ^ L 9 7 L / 7 2 r e s u l t e dj .n the average number of boat days worked per month fa l l ings l i g h t L y . A l , s o , t h e e f f e c t j . v e 2 2 t * r e t l u c t i o n i n p r i c e , d u et o t h e d e v a l u a t i o n s a n d r e v a l u a t i o n s o f t h e A m e r i c a n a n dA u s t r a l i a n d b 1 1 a r , p r o b a b l y c o n t r i b u t e d t o t h i s f a 1 1 i n d a y sw o l k e d p e r m o n t h a s m a n y b o a t s s o u l d f i n d i t u n e c o n o $ i c a 1 t ow o r k a l u r i n g p e r i o d s o f 1 o w c a t c h r a t e .

l h e J , 9 7 2 / 7 3 s e a s o n w a s t h u s a l i t t l e b e l o w t h e a v e r a g e o fl e c e n t y e a r s s o f a r a s t o t a l c a t c h i s c o n c e r n e i l ( F i g u r e 1 )v i t h t h e c a u s e p r o b a b ] . y b e j - n g a c o m b i n a t i o n o f l o w e r e d r e c r u i t -m e n t a n d t h e c o n t i n u e a l a p p l i c a t j - o n o f g r e a t e r t h a n o p t i m a le f f o r t .

Page 14: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

9-1 Sil\nd

Page 15: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

--...-I

Plate 1. A modern bondwood Rock Lobsier Boat

An older type of carvel plankedRock lobsier Boal

i i

tl: !

Plate 2.

Page 16: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

lod ue$eq V

r.{Jul,t\ +oo Pueo3eds l)op e6lel 6ut,t\oqs +pog ro{sqo.l ))od

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Page 17: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

A wire beehive pot with baif basket

Plafe 6. A load of cane beehive pots

Page 18: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 19: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 20: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 23: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

TabIe

catch/Effort Data for 1972/73 seasonin Vari-ous stat ist ical Blocks

BLOCK Nov Dec Jan Feb Mar Apri l- May June July Aug Tota I

26]2

2 613

27 L2

27 L3

27t4

28I2

2 813

2 814

29L2

29L3

29I4

3012

3 013

3014

3 01s

3112

3 t f3

3114

311-5

32L2

3213

32!4

32L5

3314

3 315

3 414

1 . 9 9

1 . 9 8

1 . 5 9

2 . 4 4

L . 6 2

2 . 7 4

1 . s 0

2 . 2 3

1 . 3 6

1 . r 5

L . 2 4

] . 5 4

| - 3 2

r . 0 5

r . oeu . I I

1 . 3 9

0 . 7 2

l .qsl .+o'

.gJ| 'oo

, : 7

t - 69l . o o

"8i"12

1 . 1 4 1 . 5 8 r . 3 3

0 . 7 2 I . 5 7 r . 6 3

1 . 3 2 1 . 1 7 0 . 5 8

1 . 4 3 1 . 8 4 0 . 8 9

- I . 9 2 1 . 0 0

L . 6 7 2 . 0 7 L . O z

L . 5 2 4 . 2 0 2 - 7 7

l . 4 6 3 . 1 9 1 . 6 2

1 . 8 r 3 . 1 6 l . 4 1

1 . 6 6 3 . 0 7 1 . s 0

3 . 2 3 3 . 2 0 2 . s 0

2 . 3 3 - r . 7 9

L . 4 0 2 . 9 2 L . 6 8

L . S 5 3 . 4 2 L . 7 7

0 . 8 0

- t - . 2 1

1 . 2 0 1 . 8 5

0 . 9 5 1 . 2 1- 2 . 5 6

0 . 5 7 3 . 3 5

0 . 8 0 l - 4 2

1 . 1 3 2 . 6 7

r . 0 0 1 . 2 8

L . 6 2 0 . 9 8

0 . 88 l - . 19

1 . 0 5 L . L 2

1 . 1 0 L . L 7

1 . 1 0 1 . 4 3

r . 0 7 1 . 1 5

t . 2 5 L . L 2

1 . 3 0 1 . 1 6

0 . 7 8 1 . 7 1

L . 2 2 r . 1 l

L . 2 9 0 . 9 2

t - 5 3 0 - 9 7

0 . 4 3 0 . 7 5

- 1 . 3 0

2 - 4 9 2 . 2 2

2 . 2 8 2 . 8 1

r . 1 2 1 . 0 2

1 . 5 3 0 . 9 4

1 . 4 0 1 . 1 8

r . 3 0r . 2 t

r .63 t tsl '+5 l .3i

' l) l"+('l .ot+ 2-o]l.ot, I "Jl

"qb 2-o+'q7 t"+A- 7 7 1- 2 . 0 3

"87 l -b2'73 i.brt- 2 . 3 0

r . 8 3

1 . 3 9 0 . 9 7

1 . 1 1 1 . 0 r

r . 0 3- 0 . 3 4

0 . 7 8 0 . 8 0

r : o o 0 . 5 s

0 . 8 0

0 . 8 9 0 - 7 8

o . 8 2 0 . 8 r

0 . 3 3 0 . 3 4

0 . 7 1 I . 4 2

r . 4 4

l .+b .bq I.ao"13 t.qt l:77

4.8'l l . r ot. ( '31 . 0 0

r l o l o + l . %0 . 4 8

.fl

l J 8L . L 9 2 . 6 8 2 . 0 1

0 . 3 3 - r . 0 7

0 . 4 3 2 . 2 6 r . 5 0- 0 . 0 4 0 . 4 6

1 . 0 6 0 . 9 8

t - 6 6 2 . 6 2 L . 4 0 1 . 1 0 I . 6 7 L . 7 2 r . 2 8 l . 0 6 l . o g l . t 3TotaI

9 , 0 9 0 , 6 4 5 P o t l i f t s .Total Catch

Total Effort

l+,1'19,-?13 lle -

Page 24: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 25: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

Table 4

catch per Pot (in nurnbers) of legal Size and undersize Rock

Lobsters for January and February in various ClePth categories

at Frenantle, Lancelin, Jurien Bay and Dongara for the L97L/72

and L972/73 Seasons.

Year 0-10 fathoms 10-20 fathons 20-30 fms 30+ fns

S rze u/s s ize u/s Size v/s s ize V/s

Frenant le 197I/72

r972 /7 3

l - . 8 0 . 0 4

1 . 1 0 . 0 2

1 . 0

0 . 8

1 . r0 . 7

tancel in* I97l /72

I972 /73 0 . 9 1 . 6 1 . 0 0

Jur ien Bay I97L/12

L972n3

. 1 . 5

0 . 8

3 . 10 - 7

r . 3 3 . 8 1 . 1 0 . 5 2 . 8

0 . 7 0 . 0 2

Dongara r97 t /72L972/73

0 . 9

0 . 5

3 . 5

3 . 2

0 . 9

0 . 2

4 . 4

1 . 4

r . 62 . 5

0 . 3 1 . 1 0 . 2

0 . 2 0 . 7 0 . 0 3

* Measurenents were not carried out in this area during the

I97L/72 season

Page 26: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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Page 27: FroN +Hod3u - library.dbca.wa.gov.au · III RESULTS A. Catch and Effort Data lhe fishing season extends fron 15 November to 14 August and may be subdivitled into three alistinct phases

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