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.
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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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dig-aquadocs-1834-317472021-07-11T05:29:03Z Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour Tiwari, L.R. Nair, V.R. Biology Fisheries secondary roduction yield biomass ichthyoplankton survival zooplankton fishery resources biotic factors brackish Dharamtar creek Bombay Maharashtra India 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. 2021-06-24T17:13:05Z 2021-06-24T17:13:05Z 1991 article http://hdl.handle.net/1834/31747 en application/pdf application/pdf 15-19 http://aquaticcommons.org/id/eprint/15934 12051 2015-01-16 08:59:43 15934 Indian Fisheries Association |
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Biology Fisheries secondary roduction yield biomass ichthyoplankton survival zooplankton fishery resources biotic factors brackish Dharamtar creek Bombay Maharashtra India Biology Fisheries secondary roduction yield biomass ichthyoplankton survival zooplankton fishery resources biotic factors brackish Dharamtar creek Bombay Maharashtra India |
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Biology Fisheries secondary roduction yield biomass ichthyoplankton survival zooplankton fishery resources biotic factors brackish Dharamtar creek Bombay Maharashtra India Biology Fisheries secondary roduction yield biomass ichthyoplankton survival zooplankton fishery resources biotic factors brackish Dharamtar creek Bombay Maharashtra India Tiwari, L.R. Nair, V.R. Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour |
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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. |
format |
article |
topic_facet |
Biology Fisheries secondary roduction yield biomass ichthyoplankton survival zooplankton fishery resources biotic factors brackish Dharamtar creek Bombay Maharashtra India |
author |
Tiwari, L.R. Nair, V.R. |
author_facet |
Tiwari, L.R. Nair, V.R. |
author_sort |
Tiwari, L.R. |
title |
Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour |
title_short |
Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour |
title_full |
Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour |
title_fullStr |
Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour |
title_full_unstemmed |
Contribution of zooplankton to the fishery of Dharamtar Creek, adjoining Bombay Harbour |
title_sort |
contribution of zooplankton to the fishery of dharamtar creek, adjoining bombay harbour |
publishDate |
1991 |
url |
http://hdl.handle.net/1834/31747 |
work_keys_str_mv |
AT tiwarilr contributionofzooplanktontothefisheryofdharamtarcreekadjoiningbombayharbour AT nairvr contributionofzooplanktontothefisheryofdharamtarcreekadjoiningbombayharbour |
_version_ |
1756078867522519040 |