Post on 11-Feb-2022
Spatio-temporal variations in demersal fish community along the fishing grounds
of Goa West coast of Indiaof Goa, West coast of India
C U Rivonker1 V P Padate1 S S Sawant2 K Venkat2C.U.Rivonker , V.P.Padate , S.S.Sawant , K.Venkatand A.C.Anil2
1 D t t f M i S i G U i it T l i Pl t 1 Department of Marine Sciences, Goa University, Taleigao Plateau, 403 206, Goa.
2 National Institute of Oceanography Dona Paula 403 004 Goa2 National Institute of Oceanography, Dona Paula, 403 004, Goa.
Feb, 2006 – May, 2007Feb, 2006 May, 200748 trawl hauls40 offshore (1 3 hrs)40 offshore (1- 3 hrs)08 inshore (1 hr)Random samplingBeach seines (02)( )
Red-belly yellow tail fusilier - Caesio cuning (Bloch, 1791)(Actinopterygii: Perciformes: Caesionidae)( p yg )
ReefReef--inhabitant and midinhabitant and mid--water schooling species (Fishbase, 2007).water schooling species (Fishbase, 2007).
Earlier reports Earlier reports –– Sri Lanka to Vanuatu and from Southern Japan to Sri Lanka to Vanuatu and from Southern Japan to Australia and Port Blair Australia and Port Blair –– Indian coast (Fishbase, 2007).Indian coast (Fishbase, 2007).
“Fi t d t id th i l k hi l “Fi t d t id th i l k hi l “First record outside the previously known geographical “First record outside the previously known geographical
– 137 (91 / 46)137 (91 / 46).– Marine Estuarine Opportunists.
P blished Literat re (Ansari et al 1995 2003)– Published Literature (Ansari et al., 1995; 2003)– Present study
– Wide habitats– Rare speciesp
BeachEstuary
OceanOcean
g pg p
– A contrastA contrastPost-larvae
Burrowing gspecies
GOAAdult prawns
Adults
Juveniles
Wandering species
Karwar
Juveniles
p pst liferastyliferaMarine, stenohaline.
Spawning - deeper watersSpawning - deeper waters
monsoon and post-monsoon seasons.
Metapenaeus dobsoniEuryhaline.
Recruitment - pre-monsoon.
y
Perennial breeder.
Metapenaeus affinisMinor contributionMinor contribution.
Spawning - post-monsoon.
Recruitment - pre-monsoon.p
GOA
Metapenaeus dobsoni
O2-deficient bottom waters
(A O t)(Aug-Oct)
Sub-surface hypoxia
(< 0 5 ml l-1 )
Invasion?
(< 0.5 ml.l-1 )
Denitrification and sulphate
reductionWater Quality
Migration
Fishing Migration
to estuarypressure
Anthropogenic t opoge c
input
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