Note Daily growth and length-weight relationship of Lates calcq-ifer ...

Note
Daily growth and length-weight relationship of
Lates calcq-ifer (Bloch) larvae during hatchery
rearing
M. KAILASAM, A.R. THIRUNAWKKARMU,
J.K SUNDARAY, MATHEW ABRAHAM, C. SARADA,
R. SUBBURAJ, G THIAGAWAN AND K W A N
Central Inahlute of Bmckrahwater Apvoevlturo No 75 Sonthome Hyh Rood.
RAPumm, Chr~or.600 028 Indrn
ABSTRACT
Duly povrh md length.wsyht ralalon.hrp of hian aeabssa Lolra crrlcenlCr
au sturnad ~n the huhely r e d Ims L.TY.O attuned mean Wtal lenpth,
nundad length md total vat woght of 10 98tO.lSmrn, 8 97t047mm and
31.93*3.63m.g reepectlvely at tha age of 21 da)., ofpast haYhn~ Growth rat.
r.0 tugher when the fwd wa. chrnmd from rot~fer (Bmchtonua plriatdul W
~ m r navplil a andA&mur homass vith 1ncr8u.d atrc vrristlon among tha
Iwaa. Thasorralat>oo cwfinenla(~taI lsngthwth totai wetghl and atandad
length wth total weight were bghly nglificant Las trlnsformd wedon were wed co mdy the I.~@.h-wmght rnlni~on~tup Total Ienpth- we~ght and
8llndud.lsrqth raghtralnt~owtup indicated tho ~liematrir pwfh in 8anbaan
1w.r dwng hatch~ly re-gphw
Informatlan on the len@h-welght of fiaher (Le Cren 1951)
ral&bonlhip of the larvae will be uefd Astan Seabsss Latra clrlcsnfer, an
ta undentand tho quhty and health of important bracki~hwater finfish
thciarvaemared in Lc hatchery Studies belon~g the fam~iy Csntropamldne IS
on length we>ght relstzonah~p of smtabls for culture which is canatrained
bracldrhwater finfishes dunng hatchery by the sva~lab~l~ty of aeed Induced
rearing are wmty In order to draw the braedmg and seed production of saahasa
product~on estimate In the fish under captive rond~t~on has been
hatcheries. ~t is lmpartant to study the achgeved in lndta (Thtmnavl*harau et
length we>pht relatisnahtp of juvenile ol 2W2, Kailasam el ol 2002) Studlee
Rshea, whtle rearing them la the an growth parameters and their relsttonhatcherlea
Thls study alao helps to ship dwlng hatchery reanng are very
determ~nsthemathsmnbcal ralationsh~p Impartant ,n order to achieve large scale
between the two var~ablea and to production Therefore, the present
calmlare the vanatlon fmm the ex- investlgst~on wae taken up ta study the
ue~ght ffo lenph of ~ndivldual or group lenph wetght relationsh~p of seabass

M Korlararn at al. 488
larvae and ky from day one ta twenty
after pwt hslehing
Newly hstched seabsss larvas were
obts~nad from the fish hatchery,
Mutt~&bdu enperlmsntal statton of
Central lnctstute of Brsckrshwater
Aquaculture. Chennal Larvae wsre
reared mtndwr tanks oftwo ton capacity
FRP t u b 8t a stocking density of 15
larvae I htre fm up to 21 daya. Ratifer
Bmchronur phcatdu waa ~ntrcduced as
inlhal feed on day 2 at the rate of 5 nod
ml and it waa gradually mmsad to 20
non /mi on day 8. Anemlo nauph wsre
lntroducrd an day 9 at the rate 2 sadml
and 11 waagrsd~dl! .omased to ?O~ae
mi on oa! 21 The .map wsre fed wtn
Anernlo nauplll frcm dsy 1S to 21 Ra.lio
denaity was gradually reduced from day
10 and completely ltopped on day 15.
Rattfer anddrfemlo dcnalty m the larval
Le Cran 11961! u an exponential form:
W an Lb (11
Where. W = Relght of fish, LS
Length ofthe fioh. a = constant and k
expanent~al value Whe the data IS
transformed tnto logarit~mic form, a
linear ralationahrp 1s obtamed for
equation (1) u followa.
Lag,,!W) = h ,,lai i b lol,,lL) (2)
In the presentatvdy then-weight
sod SL - walght relationahip of the
xabaas larvae are computed by using
Equat~on (2). The puametere a and b af
equation 2 were computed by leaat
aquares method.
If fish retain8 the name shape ~t
grows isametrieally md length exponent
'b' haa the value b-3.0. a value
n~:m:l! largeroimalcr.msr -3 0
rearing tanks were monitored duly and ahowa allomctnc prcwb A value leas
thedsna~tywas adjusted accordingto the tnan 3 0 ihows thmr 53h oacomaa Ilzhtar
requirement. Water quahty parameters 3epa:lvr a!lame:rx or peter thsn
were recorded daily. Wstar exchange was three shous tnat the lt11. Oecomer
done In the larval reanng tank at the hearlsr poatrtve allooetrlr 10. s
rate of 20% for five days and thereafter peamar .esgth as ~t lnmaaes tc a m
n was mcreaaed to SOB Tanks were Wual:un. :ti98 ksarpm?h.-au u s
mildly aerated during the period of cbcu:sted elau~trcallr lor rim bl0ereo:
experiment Twenty larvae were growth phaaea nccordmg to the change
mlleeted from the rearing mka oa daily of the feed
bsax for 21 dam. Total lend !TLi and
rrsnoad IPC~U, SL.fmm upoltheanoc: Mean daily mcrement on total
to the o7k.n of rauoa. @ULIC.P 01the
length, standard length and wet weight
lanar were rceaw.~ from dsu : to 2:
of aeabsas larvae are ahown In F I 162. ~
and wet wetght of the larvae was taken
Logarithmic relationahip of length and
from day 9 to 21
welght relatlonahxp offree embryo surge
of larvse are shown In firms 3 & 4
To study the langth-welght Mean toti length and mean standard
relatmnsh~p Total length (TLI. Standard length of the larvae on day one wa*
length !SLl to nearest m~llirneter md measured as 1 48.0 1- and 129t0.11
wesght(g!were meaaured Th16daU was mm rerpenvely On day 21, the larvae
used to determrne the relatlonsh~p attuned mean total length and mean
between TL and ws~ght and SL and standard length of 10.96~0 49mm and
wcight ofthe seabass larvas
8.9110 4lmm respnnely. Ntne day old
The functional relatlonshlp between seabsss larvae had mean weight ol
body weight IWi and Length IL!@ven by
1.44+0.11mg and further attamed the

Gmwrh ondlengh.werghl rehiomhip ofAs~nn redoer
I
fig 1 aauplii Like wae.
the growth trend
I ahowad another
p a h h day 15h lo
21 days, msldy due
to sb,Lty ofthe fry to
feed on A~tcrnra
neuph, voranovaly
Growth md a-val
ofthe fish larvae can
be enhmmd mgnlfic
antly with an
I
mmane ~n Arternlo
f&g level (Durav
I et oi.,i991). Kim d
# # < , , , * * , .
t..
-.
u , , m
a1 (19861 have
reported h~gher
mwth rate in Coho
Salmon fry, whlle
feeding wlth
Arternlo biomass
than other feeds.
Dhert rt d , 119901
have reported that
the quality of the
seablua fry produc.
I tiaa 1s god in terms
of stress reslatance.
plgmentatlon sapsn-
, ally, whila feeding
with ("-31 WUFA
, . ,. 8, 8, .. $5 "

" ,I ..
and weight of the
8
, 8
coefficient of
I
mrrelatias between
TL and welght 16
0.931 and SL snd
welght ia 0 929
whleh I8 highly
axgaificant (p
,,
---, .. I I
c0.001) indicstlng
the ponitive
mrrelaboa bstwwn
!en@ and weight.
The eatimated
F I 8 ~ TOW irnnh and raght nlbon.lup dhkl llnrne ~ ~ ~ ~ t e r ' s b ~ d t ~ ~
length.weight
relationabip u h the
form of loganthm~c
equations sa follows
Log (weight) =
3.1126' lag (Total
Length). 1.8096, R'
= 0.96 (3)
Log (waightl =
3 . 0 1 4 6 * L a g
(Standud Lansthl.
I 14351, R'. 0.89
(4)
The standard
,. .I 0, I , 8, I. 8 I --- anma d'b'vdues .a
~y 4 SI.D&~ and vetfit mluonlbp of ~uhu h a t :$a:,":B O3 ynp:
l e d laadd emr for btpl laow are highly aigni8c.n; as far their
(TL) at.ndard length (SLI, ~*ve~s~~n vdu@e are concerned. The
mmlat,on nrffi"ent beturees TL, SL departure of 'b' valves from the
TABU 1 Camhrton wfi~nl o/z0ldirmh ~ndnoddirnglh (-mum,
meaniryhJwuhw~lghlSlmbrurhnnudvMghrwl mulwpmd
mwmwnd
GrmhP~nm~tm N M~mum M-urn Mmn Corninuon
(mml (mm) (-1 cmBdsnt
nth xmsbr
Toui Lard,
Sundud La@
21X)
260
3 78
2 18
l2SU
10 72
87liO UB)
7 W(0 1211
0931
0 929

Omwth and length-walght rsiahowh~p sfkron arabosr 491
mavanuoaa. cube law w a swan: ~ p Acbowledgments
q0 0Cl for %t TLana SLrndr~cn~uc
Avthora thankful to Dr P
dlornetric pmwth of the aaabasa lwac Ravichsndran, Dtrector. Central
in the hatchery remg phase.
Thue are three diRamnt gmwb rate
baaed on the fwding prornol. 1" phase
RornOul8'day ZMphaseimrn9*10 14"
day and 3* phase horn 15' to 21" day.
ln each phase, the ham growth rate
with the day (X) w8a calculated
atlbhcdy for length m d waght. The
hear repmion equation for each phase
ia &,"en blow.
Tot01 le"@h
l'phlae TL = 0.1647 X t
1.8128. R' = 0 918
P4phase TL = 0.9445 X .
4.2432. R'= 0.9683
3"phnep TL = 0.6023 X +
14529, R' .0.8012
SLandard length
laphnep SL = 0.1093 X +
14093. R' = 0.861
Pphnep SL = 0.7366 X -
3.1464. R'= 0.9269
P p h w Wezght = 2.1367 X .
18.5214, R'. 0.9336
3n phaw We~ght s 3 7493 X -
42.0214. R'= 0 4037
R' valw revealed that the haearity
was moredungthe aeeond phase oftha
growth whch may be due to change of
the feed from rottfer to&emia naupiii.
Institute ofB~acLiahwster Aouaculture.
Dr M Murahdh; la ackoowledged for
h18 help m atattst!cd analyam
&uW, Mdh. Phhpptaoa, p 819.329
Duray, M,.N. C B Estudlllo and L.O.
Npaaam 1997. Larval r~arinp of the
noupor Epanrphelu, auiliu, under
laBntoryron&t~o~.~uncul~un, 16€
' 63.76
dump btchari nmq p&.. Indun
JaumdofFukrur. 40 il) 107.113
KimJ, K C. Muaol. R W Hlndy 1886. Mvlt
art.m~a a# fwd for Brmt iadtns Coho
Sslmon IOnrorhyncu, kt,utrhl,
Aquantltun. 144 217.226
L4 Cm, E.D. 1961 J Ancm. &rl, 20.201.
219
Thlrunavukkara#u, A R. M.Ka!la#nm,
P.UhChndm P Slur-, Mathew
Abrahsm, A.V K Chailas and R
Subburnj 2001 Capt~ve broodstoek
dwoloprncnt and bne&na of #s.h#a
Lsn~ rdranirr LBixhl tn India In
Perrpcnver m M~multun, N.G.Monon
& PP.RU.I 1Edr.l. 111.124
Wmttoa. R.J.. lPP8 Ecoiosyofirl~l
ruher
Chrpmno and Hall. London.

Lint of Relsrees : 1JF Vol. 63,2006
Ahmed All P.X.R Nair
Boopndranath P.R.S. Pilla~
Devadoas P Phil~ppoae K K
Dhannaraj Rathibha &hit
Fellx Radhahishnan AG.
Garg S.K %jaaeLharan Nair J.
George J.P. RaJendran A.
Gopakvmar G. Rajeshwari Shome
Gopdakrishnan Ramachandran
Jayaprahash A.A. Sachanah
Josileen Jose Sanll N.K
Kamaldeep Kaur Sankar T V.
Keaavappa G.Y. Santiago T.C.
Krishnakumar P.K. Saramma A.V.
Kuldeep Lal Sharma G.K
Lalitha Sobhana KS.
Laxmilatha Sukumaran P.K
Leela Edwln Svnilkurnar Mohammed
Madhueoodana Kurup Thmmavukkarasu A.R.
Mohan RaJ Thomu P.C.
Mohanty S.N. Udupa KS.
Muthtah C. Vuayan KK.
Nandakumar G Vivekanandan E
Narasirnham KA.