Volume 2, No. 3 JULY - SEPTEMBER 1997 CENTRAL INSTmm OF BRACKISHWATER AQUACULTURE. CHENNAI -1

Research Hie

Shrimp N - . -. sale ot na scabass

I raming

'ublications

Baff News

Award

Appointm

f \

brea~uoougn m me successru~ W i n g and seed production of seabass (LaIes calcarrfer) at ClBA

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\ /Edited hy Shri

Dr. K.GOPMATH blJLIANA.

P uo,

ni-M)Om

Lcrmar Inn A

141. Marst

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rnAWAR 5 Dr Scientists Dr. G. R. M. 1 Di-. CIRA. Chmn; irutc of Rracki quaculture. all's Rod, El . ,Aa.....,

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EL. 'AN & .. .. ". . .. .

BREAKTHROUGH IN THE SUCCESSFUL BREEDING AND SEED PRODllCTlON OF SEABASS

(LA TEA'? ( 'A I,CA KIFI.,'R) AT CIRA

W a y old h.tdmry reared reed of wabau (L cakailhrj

For the first time in India, ClBA The males attained maturity by Scientists have successfully bred the the end of June 1997, while females Indian seabass. Lutes calcarger, under were in maturing stages. To accelerate controlled conditions and produced the gonadal maturation in females,

at the ex~erimmtal fish hormone pellets were implanted @ hatchery at Muttukadu. Since 100 of body weight, 15-30 days September 19941 fishes of * lo kg after implantation, the diameter of the weight obtained from hook and line eggs incRased, operations carried out in Kovalam backwaters and adjoining rocky inshore and wen sea were maintained in a 0.075 ha with LHRH-a @ earthen pond till December 1995 and 65-70 )Ig1kg body weight for females later transferred to a 100-ton capacity and 40 body weight far males. RCC tank provided with water From July to September 1997, four exchange (SO?/. daily) and reared on a S U C C ~ S S ~ U ~ spawnings were observed diet of trash fish (Tilapiaand lesser and the details are given in the dines). following fable.

. . .

No. oi

lone uwd (IY~'~R)

I.;t spawn1 llnd spau

:u hrcedtn~ exm~rnenrT In uanaw I. clrarrfm -" T pl No 1 , Expc. No 2- Expt. No 3

2-7-97 23-7-97 6-9-97 >I ttsh (tn kg) k emale lo , 6 8

Male 2 8 3 2.5&3 , 2 0 & 3 5 I I R H - a LHRH-a I LHRH-a f

Vemale 70 ' 65 65 Male 40 40 i 40 '

No ot e~gs (cn mtllton) I 151 spawntng I 4 1 1.05 1 1.20 . llnd qpawntn~ / 1.30 I 100 0 9 0 i

*- -Cfcrttl~satton I

70 110 i 70 I N n N n 40 1 fot i l txd fef l t l~ud I I 1 1

ing tning

"g ling ;in million) --

- " I 1st \pawn11 8 0 9 0 60 llnd qpawr I N I

40 fhatchltngg ( I

1\t \pnwntng 0.62 1 0 76 0 14 , llnd zpawnlng NII ' NtI I 0 14

"'0 of qurv~val-up to-20thday 1 I4 R R ~ - - [ ~ X I 1 I 7 79- --,

UtIIIU 1111

The in11 kept in vp i~wni Spawni time ah The hatc in qi7e.

l'he hormone administration was .I--- .L augh intra-muscular injection.

cclcd female and males were a 20-1011 capacity rectangular ng tnnk in the rat io o f 1:2. ng took place during the day out 33-36 h after in,jection. ,hlings measured 1.2 to 1.4 mm

The hatchlings were stocked 0 3 - 4 0 no.4 in the larval rearing tanks nnd fed with rotifers up io loth day.

fmm I I .' T h

breedin opened L . - c , .

firm- 1 I lh to 15th day with hoth mtifen

mra nauplit and from 16th to y only with Artcmia nauplii. ,tvnl rate upto 20th day ranged 90 to 17.79 O/..

is hrenkthrough i n seahass g and seed production has tp new vistas In brackishwater

tlnrlsn nreeding and seed production, which w i l l go a long way in meeting the needs o f diversification in coastal nouac11Iture.

Thi term o f 1

A , R.Thl .. .

s work was ClRA scien irunavukka~ - - .

carried out by a lists, namely, Dr. .asu. Dr. Mathew

I, Dr. r. ~tshbre Chandra. Dr. nnee

RESEARCH HIGHLIGHTS

Shrimp Nutrition

Testing o f the probiotic v t .

bacterial gut microflora (isolated from

the digesttve tract o f penaeid rhrimp and multiplied in rl bacterial fermentor)

in shrimp diets, was carried out with juveniles o f shrimp Prnacus indicus

Results indicated that at 3% inclusion

level. the feed efficiency and growth o f shrimp were significantly improved.

Sale of hatchery reared seed of seabass

The first consignment o f hatcher) reared seed o f seabass fL. calcarifer) was delivered to Mr . Samarasan. a progresstve fish farmer, at a functlon held on 30.8.1997 at Muttukadu Experimental Station. A total o f 1.8 lakhs seed were sold to 9 fish farmers.

VISITORS The fo l lowing visited the

Muttukadu Experimental Station:

9 Fisheries officials from Dept. o f Fisheries. Govt. o f Tamil Nadu, 23 July 1997.

Dr. Martin Kumar, Dr. Rob Lewis and Dr. John Keesing from Sardi Aquatic Sciences Centre. Australia. 12 September 1997.

Dr.Shaw Mohammed Farid. Secretary. Ministry o f Planning. Govt. o f Rangladesh, 20 September 1997.

Shri R.K. Tripathi. IAS. Secretary. Dept. o f Fisheries. Govt. o f West Rengal and Shri Abhay Rath. IAS. Principal Secretary, A.R.D. Dept.. Govt. o f Orissa, 20 August 1997.

ENGAGEMENTS Dr. G.R.M. Rao. Director.

attended the fo l lowing meetings: zeminars:

Anranam M. Kaila Pereirn.

sam and Dr .(Kum.) Shi

- The ACIAR-ICAR Interface meeting at New Delhi, 9-1 1 July 1997.

- Second Meeting of the Aquaculture Authority of lndia at Chenna~, 2 1-12 July 1997.

- Seventh Meeting of the Executive Committee and Third Meeting of General Body of Rajiv Gandhi Centre for Aquaculture at MPEDA, Kochi, I August 1997.

- Ray of Rengal Programme Consultative Meeting on Coastal Fisheries and Aquaculture Manage- ment Pmject in lndia at Chennai, 19 August 1997.

- Third Meeting of the Aquaculture Authority of lndia at Hyderahad, 10- 1 1 September 1997.

- Div~sional Meeting of ICAR Fisheries Institutes at CICFRI. Barrackpore. 17-1 8 September 1997.

Shri S. Srinivasagam and Dr.R.P. Gupta. Senior Scientists, attended the meeting convened by the collectorate o f Chengalpet- MGR dis t r ic t at Th~ruvallur to discuss the problems of fishermen community, on 8 July 1997

Dr. I..H. Rao. Senior Sctentist, a t tended the RORP Consul ta t ive Meet ing on Coasta l Fisher ies and Aquaculture Management at Chennai. 10 August 1997

I . - - 1-day old larvae of seabass

1

Dr. M. Natarajnn. Senior Scientist. Dr. C'. Gopal. Scientist (S.S.) and Dr. K.K. Krishnani, Scientist . attended the National Workshop on Fish and Prawn Feeds at CIFA. Rhubaneshwar, 2-3 September 1997.

Dr. M. Krishnan. Senior Scientist. attended the Xlth Nat~onal Conference

MEETINGS The Fourteenth Meeting o f the

Institute's Management Committee was held on 2 July 1997.

The ICAR Foundation Day and ClRA Foundation Day was celebrated on 16 Ju ly 1997 at Muttukadu Exper~mental Station.

on Agricultural Marketing. organised HUMANRESOURCE by the Indian Society of Agricultural DEVELOPMENT Market ing and Tamil Nadu S ta t e Agricul tura l Market ing Board at S h r ~ M . Kathirvel . Senior

Sc i en t i s t , a t t ended the Advanced Chenna~. 17- 19 September 1997. Course on Management of Agricultural

Research ln s t i t u t e s 1 Stat ions . a t National Academy o f Agricultural Research Management, i iyderabad, durtng 18-23 ~ u i u s t 1997.

T RAINING Shri R.S. Ganesan and Shri R.

Ravichandran. RFDA officials from G o v t . o f Tami l Nadu and Shr i R. Stanley, a pr ivate sh r imp farmer. participated in a training programme on "Diagnosis, prevention and control of shr imp diseases", sponsored by the Dept. of Agriculture and Co-operation. Ministry of Agriculture, Govt. of lndia under 'Centra l sector scheme' and conduc ted by C l B A at Muttukadu Experimental Station during 26 August - 8 September 1997.

Dr G R M Rao Dfredo, present~ng the firs' consgnment of hatchery reared scad Of 8 Scientists from Central Marine seabass to Mr Samarasan a progreaslve f e h farmer Fisheries Research Institute. Kochi.

trol led .. . ing and se 5, Loler calcr imenta! Sta ~ber 1997.

oreea ~eaba.~! Exper septm PUB1

T hrough . I t : - :

.ICATIONS he following publicatio~ '1 out: on 2020. ClBA Psnpceti - v1.31

- Ral

STAF -..-. ,

Ir achiev reed PI llmb

"

I recognition ed in contrc aduction o f in India

or me meawthmgh alled breeding and seahass for the first the Aquaculture India. Chennai.

.....- Found honou Thirul Ahraha - . -

red the Scientific (Dr. A, R. Dr L H Rao, Senmr Scentst, explaln~nq the lnstltule s adivltles to me vnRing Audrallan navukkarasu, Dr. Mathew scenttsts Im. Dr. P. K inhm Chandn, and

11r. M ). Technical (Shri Admlnktnthre Pmtsonnol Shri C. Raghu. as SS Grade I Vasant'

Miss R. Vetri Chelvi, as Junior (Fisherman), at Chmnai. 25 July 1997.

(SIShl anandam and C. Clerk, a Chmnai. 13 August 1997. Shri P.G. Samuvel. as SS Grade I

Saravanan) personnel hy presenting a (Fieldman) at Chennai, 29 July 1997. edal and a citation each, on 16th

Supptntlng Personnel Shri M. Sakthivel, as SS Grade I 1997. (Fieldman). at Chenna~, 30 July 1997.

. Kailasam hkumar Cha~ r i V . Jeev

gold m August

Shri S. Sclva Babu, as SS Grade I Shri R. Mathivanan, as SS Grade (Fieldman). at Chmnai. 23 July 1997. 1 (Fieidman), at Chennai, I ~~~~~t

Shri D. Senthil Kumar. as SS Iw7.

O d e I (Fieldman). at Chennai. 24 July Shri A. Paul Peter, as SS Grade I 1997. (Peon). at Chmnai. 4 August 1997.

sclern S I

Scimti Chennr

hr i Akshaya Panigrahi. as st (Fish & Fishery Science). at 11.7 August 1997. hri Jitendra Kumar Sundaray. as st (F~sh & Fishery Science), at 11.27 August 1997.

SI Scient~ Chenne

Tat hn Shri A. Nagavel, as Technical

istant. T-11-3, at Chennai, 21 1st 1997. Shri R. Subburaj, as Technical

Assistant, T-11-3, at Chennai, 27 August 1997.

Shri Ashok Kumar. as Technical Assistant. T-11-3, at Chennai.1

her 1997.

Assi Aug~

Septem SI

Techni 24 July

-.

hr i D.M. Ramesh Babu. as cal Assistant. T-I. at Chennai, 1997.

Shri G. Thiagarajan, as Technical Assistant. T-I, at Chennai, 4 August 1997. #CAR Foundatmn Day and ClBA Foundatwn Day wlebntlons at Multukadu Expenmental

Staton of CIBA Dr S Ramarnurthy. Pnnapal Soentnt (RM) of CAR Fshenes lnshtute kkcnallng on the -wn (bll lo ngh!) Dr K Gopmathan. Senwr Soentat. CI&9 Shn K N

Knshnarnurthy. hrmp.1 Suentlst (Rtd ). Shn K Dora~ml Pnnapal Scentst CMFRI. Dr G R M Rm Dractor Dr M SaLthkrel. F%sdent. AFI and Dr K Alagamja AFI

Shri K. Karaiyan. as Technical ant, T-1, at Chennai, 10 ber 1997.

Assist Septem