Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour
The rich zooplankton standing stock of Dharamtar Creek showed a variation of 8 to 5261 (av. 1032) mg C/100 m super(3)/d which led to a turnover of 29 tonnes C/km super(2)/y. The estimated fishery potential from zooplankton production was 0.079 tonnes C/km super(2) or 29.00 tonnes/km/y. The worked out yield in terms of wet weight of fish was 0.059 tonnes/km2u2/d. Experimental trawling within the creek showed a potential of 0.19 tonnes/km super(2)/d suggesting a transfer coefficient of only 31.4% form secondary to tertiary level. Fish eggs and larvae were very common in the area but contributed collectively only 1% to the total zooplankton population. On an average the outer zone sustained relatively higher population of fish eggs and larvae than the interior zone. The mean population density of larvae (334/100 m super(3)) was 3.5 times higher than fish eggs (93/100 m super(3)) suggesting the good survival rate and a congenial environment for larvae to thrive.
| Main Authors: | , |
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| Format: | article biblioteca |
| Language: | English |
| Published: |
1991
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| Subjects: | Biology, Fisheries, secondary roduction, yield, biomass, ichthyoplankton, survival, zooplankton, fishery resources, biotic factors, brackish, Dharamtar creek, Bombay, Maharashtra, India, |
| Online Access: | http://hdl.handle.net/1834/31747 |
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