Stock assessment of tunas from the Indian seas

I , . @ a ^I,

I$ I !

Stock assessbent of tunas front

ⁱ

jthehidianl . ,,,

^{1 1 1}

s e a s

⁴ 3 , 7 b i p

3 2 L ,

, l i , 1

, I " , ,.,ill,:.

"P

S

B

_R J A @ ~ ~ PPP1L~U2. A X J ~ ~ A P R A K A ~ H ' ,

i

^M

4d~&$*k~,

R < $ ~ ~ & I M W T A N ? , ,,I

c

MUTHIAP,

G G ~ A I & J M Ifi,l ~ ? k l ~ Y PI~LAI" s S W ~ E N ~ , R

T ~ ~ A c ~ , ~ ~ , w M + \ O ~ ~ K

P

SMQ KBYA".

' C

hh

;~uJ&$~hll

.

^M VAQ&f#QIJU1', K N KURUP'~ and T

v

SAT'YANANDAI@~ J!* * ( 1 1 4

' ! 1 8

,,,

,,

, ^{3 ,}

,,

^{, , < 7} t J , . ' , ; > ⁸ 1 r .

~ e h i d l ~ur'inq'lcish~ries keseprch $sti&tq, cG&&, Kewla 482 414 ,

^o

\ I ^{I ,} ) ..a , c 5

ABSTRACT

I , ! I , I ,I

.

^{3 ,} ) ~ s i i ~ ~ d ^* q L i t' I P , ( ~ ( 1 '

'

' a

The tuna w h In Indin in the small ec& seaor fluctuated b e # ~ d d 2 l l l Y 0 t ~ l h e s

and

3'5'616tddnt3dddHg 1984.88, yleavcrsgecntehhr the p e n d balng 29 146 lonnes. I*

t9~:it3$4i)&nki of&nas hw?&d&dl$

the aFtn;annl sector. On an werage the little tunny (Euthynnus ufin~s) contributed 50%:'ftidrlte h a @&is!,

f k u r d ) nnd bullet tuna (A rmhr) 16%. &qtj&ck tuna ( ~ ~ r . t ~ r m i 8

p r l d h l i . ~ ~ ~ ~ f b n g t " ' ~ ~ y ~ ( ~ ~ ~ ~ s ~

tonggol) 4% and other tunas (unclass~fid) 14% of the tdtudtl'datCH.'

n e stock rrcrsessrmrofAire+~G aFnmas rnnggol and K&uwr,nrcs pelamn~ q&'m@'Based on alohg the west and east -is of Indm md froin

centrewlse catch. effort and specles compos~tion are mdlcated. The length frequency data of d~fferent specles from Madras, Tuhconn. V t h j a m . Cochln. Calicut, Mmgalore and Min~coy were utlllzed for estimating mortality rate and recmltment pattern and for assessing y~eld and b~omass The annual values of Z and F were also calculated.

The tuna stocks in the trad~uonal fishnggmunds are exploited to the maxlmum level Increase Ineffort may not fetch enhanced returns In terns of direct operat~onal cost (DOC) and cost benefit ratio (C:B). Theeconomc util~aonoftunahve-bats and enhancedexplo~tationof all the specles from thenorthem Islands couldenhance the tuna product~on m LaLshadweep.

Tunas constitute one of the important marine fisheries resources of our country contributing 1.5 to 2.0% of the total marine fish landings. The potential c~f this resource has been estimated to be 200 000 tonnes in the Indian EEZ. Popularly known as the 'chicken of the sea', tunas comprising of a number of species are exploited all along the Indian coasts. Tuna, fresh or processed in different styles, is a very important co~nrnodity in the

&sentaddress: D k t o r ' (Rrtd). 'Rmgam', 26/447B, Thevma, Cochin, Kerala 682 013.

'Principal Scientist,

'.

"Sc~entist(S:lection Grade),'%- nior Scientist. I5scientist.

'~cientist (Selection Grade), Calicut Research Centre of CMFRI. West Hill PO, Calicut. Kamataka 673 005.

'Scientist (Selection Grade), Mintcoy Research Cen- tre of CMFRI. Minicoy. UT of Wtshdweep.

"Senior Scientist. Mmgalore Research Centre of CMFRI. P B No. 244. Bolm. Mangalore. Kamataka 575 001.

'~cientist(~e1ection Grade), Vizhinjm ResevchCen-

world trade for fish and fishery products. In India, they are mostly consumed in fresh condition. Except for the traditional 'masmin' preparation in Lakshadweep and limited pro- duction of canned and frozen fillet tunas, export oriented processing is in its infant stage.

The status of tuna fisheries in India and their distribution and abundance in the Indian EEZ were reviewed in the recent past (Silas

treofCMFR1. Vizhinjam PO,Trivandmm, Kernla695 52 1.

'Scientist (Retd). 9-21-6 CBM Compound. AV Post Office, Visakhapatnam. AP 530 003. ^'

"~cientist (Selection Grade). Madras Researchcentre of OCT.1FRI,68/1,4th Floor, Greams Road. Madras 600006.

"Scientist. Veraval Research Centre of CMFRI, Bhidiya Plot. Near BMG Fisheries. Veraval 362 267.

"Scientist (Retd). LIC. 79. KHB Colony. MM Exten- sion. Mahentesh Nagar. Belgaum. Kmataka 590 016.

'"ethnical

Officer. Visakhapatnam Research Centre of CMFRI, Andhra University PO, Visakhapatnam 530 003.