Author(s):
1. Tehmina Batool:
Centre of Excellence in Marine Biology, University of Karachi,Karachi-75270,Pakistan
2. Ghazala Siddiqui:
Centre of Excellence in Marine Biology, University of Karachi,Karachi-75270,Pakistan
Abstract:
The 322 specimens ((?=198; ?= 124) of J. dussumieri (Cuvier, 1930) were collected from commercial landing of Karachi fish harbor and were used to determine the diet composition and variation in feeding habits of fish in relation to size, sex and season. The gut content analysis showed that crustaceans (54.14%) were the primary food source among which zooplanktons were dominant (24.49%) over shrimps (19.89) and crabs (18.35). The other food items recorded in the gut contents were fishes (11.31%)), molluscs (4.09%) and miscellaneous digested matter (22.31%). There was insignificant (P>0.05) variation in quantity and quality of consumed food with sex and size of the predator fish, however there was significant (P<0.05) variation in feeding habits of fish during pre-monsoon, post-monsoon and monsoon season. The highest percentage of empty stomachs was observed during pre-monsoon and S-W monsoon seasons due to gonadal maturity and spawning activity. The GaSI of J. dussumieri ranged between 2.57 and 6.78 whereas H.S.I ranged between 0.89 and 4.83. The highest rate of cannibalism was observed during pre-monsoon and in both sexes - females showed highest percentage of cannibalistic fish in their stomach.
Page(s):
329-337
DOI:
DOI not available
Published:
Journal: International Journal of Biology and Biotechnology, Volume: 17, Issue: 2, Year: 2020
Keywords:
spawning
,
cannibalism
,
Gastrosomatic index
,
Hepatosomatic index
References:
References are not available for this document.
Citations
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