cifri annual report 2007- 2008 - Central Institute of Brackishwater ...

CIFRI ANNUAL REPORT 2007- 2008
.fossilis, Xcncntodorl i.(~ni-ila, Churlrli3 /ZOI(-~(I~~LY,
M0c.r-ognntliris pr~nc-rllu.c., Cltoncii~ nunu, Ptrrltilis
c-onc~lrorliu.~. .l.ro~~horr,P.vcrr(f(~nlhu,r,ris hnc.1ili.s) was
collcctcd and documented.
Fish catch data of 22 spccies apart from
rnisccllnncous group was collecterl from River
Brahniapiitr;~ at Ilznnkazar fish assembling centre.
Ciuwahati during the pcriod. Total monthly fish catch
at this centre rangcd fro111 7980 kg (.lunc) to 44 184 kg
(August). Mr!jor annual contribution during the
pcriod calne Srorii a small-sized C'yprinid species,
A.spi(io/)clr-iu nromr ( 106245 kg) followed by stnall-
sized catfish spccics, Aili~ c~)i1(1 (31431 kg),
miscellaneous spccics (20554 kg), Cr~tlo c'atln ( 14465
kg). 7: !li.rl~o( 12828 kg)and L, lwl~it(~ ( 12338 kg ). The
catches of 1,. cj cct)
The findings indicate thcrc is a perceptible sliifi in
geographic distribution of'the fishes of river Ganga.
Thc warn1 water fish species Glossogohiu.~ giuris,
Puntitis tic-to, Xoncwtodon cancila, M~:rtus ittu tutu.^
-
carlicr available only in the middle strclcli ol' river
Ganga arc now available in thc colder strctch of tlic
river around Haridwar. 111 thc Haridwar strctch dur~ng
the pcriod 1070-86 thc annual mean ~nitiii~li~til watcr
ietnpcraturc was 12,') "C' ( 13°C'). whilc during the
pcriod 1087-2003 it ~ncrcascd to 14.5"C'. a11 incrcnsc of'
1 .S"C is thus cvident. ,As a rcsult the stretch oI'ri\,c*r
Cianga r~round Haridwar hr~s becotllc n
habitat for thcsc warm watcr fishes.
congcnlal
Elcv;~tcd tc~npcraturc range (0.37"C' 0.07"C') and
alteration in the patten1 of'tnonsc~on lii~s hccn 21
~il;!ior
factor li)r shifting of the brecding pcriod of' Indian
tnajor carps in acluacul t urc frotn Junc to March in list1
hatclicrics of Wcst Ijcngal and C)riss;l in tlic last two
dccadcs.
Ex situ cxpcrimcnt with I,, I-ohiro lingcrlings li)r
cvalunting the unit growth in weight pcr iinit rise in
tcmpcr;lturc indicated that thc spccilic grnwth rntc 01'
the fishcs in showing ii rising trend at 8.53('/0 bctwccll
20°C and 34°C'. 'I'lic maximum SCiII 27.05"/0 was
rccordcd at 34°C'. At 35°C' tlic SC;I< valucs clccrc::sccl
by 30.5(%1 cotiip;lrcd to that 01'34°C' ant1 ind~catcd that a
ternpcraturdbcyond 34°C' is dctriliicntal Ibr the list1
growth.
C:PP N 34: I mprovcd fislierics j I-otlu~li\~ity
and nanagement in tropical rcscrvoirs. Thc
multidisciplinary prc).ject ~ir~dcr C'CiIAR C'liallcngc
progl-aninw on Watcr and 1:ood (C'PWI'), wa\ initiatcd
in 2005 and is ;limed to increase productivity ol'watcr
and provide sust;iinablc livclilioods to rural poor
through irnprovcd fishcries n~an;ipctncnt. C'II:RI is
operating in Indo-G;ingctic basin in which reservoir
case studies have bccn sclccted in IJttar T'r;~~icsti
(Pahuj) and Madhya Pradcsh (Dahod). Main
objectives are to dcvclop, verify arid implement