Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea
Length frequency data of the longtail tuna, Thunnus tonggol collected from October 2006 to September 2007 were analyzed for evaluation of the stock parameters. T. tonggol is mainly caught by gillnet method. Yearly tuna and tuna-like catches in Iran are of the order of 174,234 mt, close to 46% of which are longtail tuna. The VBG parameters for longtail tuna were: L∞ =133.72cm K=0.35 year^−1.The length-weight relationship was estimated as: W=0.00002 L^2.83. The instantaneous rates of total mortality (Z) was estimated by using the Powell-Wetherall plot as 1.82 year^−1. The instantaneous rate of natural mortality was obtained by Pauly equation (M=0.44 year^−1) and the instantaneous rate of fishing mortality (F) estimated from Z-M=1.38 year^−1.
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| Language: | English |
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2013
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| Subjects: | Biology, Fisheries, Growth and mortality parameters, Thunnus tonggol, Persian Gulf, Oman Sea, Iran, |
| Online Access: | http://hdl.handle.net/1834/37409 |
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dig-aquadocs-1834-374092021-07-08T02:58:27Z Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea Kaymaram, F. Darvishi, M. Behzadi, S. Ghasemi, S. Biology Fisheries Growth and mortality parameters Thunnus tonggol Persian Gulf Oman Sea Iran Length frequency data of the longtail tuna, Thunnus tonggol collected from October 2006 to September 2007 were analyzed for evaluation of the stock parameters. T. tonggol is mainly caught by gillnet method. Yearly tuna and tuna-like catches in Iran are of the order of 174,234 mt, close to 46% of which are longtail tuna. The VBG parameters for longtail tuna were: L∞ =133.72cm K=0.35 year^−1.The length-weight relationship was estimated as: W=0.00002 L^2.83. The instantaneous rates of total mortality (Z) was estimated by using the Powell-Wetherall plot as 1.82 year^−1. The instantaneous rate of natural mortality was obtained by Pauly equation (M=0.44 year^−1) and the instantaneous rate of fishing mortality (F) estimated from Z-M=1.38 year^−1. Article includes abstract in Farsi on last page. 2021-06-24T18:05:35Z 2021-06-24T18:05:35Z 2013 article TRUE 1562-2916 http://hdl.handle.net/1834/37409 en http://www.ifro.ir application/pdf application/pdf 855-863 http://aquaticcommons.org/id/eprint/22652 18721 2018-05-09 19:51:03 22652 Iranian Fisheries Science Research Institute |
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Biology Fisheries Growth and mortality parameters Thunnus tonggol Persian Gulf Oman Sea Iran Biology Fisheries Growth and mortality parameters Thunnus tonggol Persian Gulf Oman Sea Iran |
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Biology Fisheries Growth and mortality parameters Thunnus tonggol Persian Gulf Oman Sea Iran Biology Fisheries Growth and mortality parameters Thunnus tonggol Persian Gulf Oman Sea Iran Kaymaram, F. Darvishi, M. Behzadi, S. Ghasemi, S. Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea |
| description |
Length frequency data of the longtail tuna, Thunnus tonggol collected from October 2006 to September 2007 were analyzed for evaluation of the stock parameters. T. tonggol is mainly caught by gillnet method. Yearly tuna and tuna-like catches in Iran are of the order of 174,234 mt, close to 46% of which are longtail tuna. The VBG parameters for longtail tuna were: L∞ =133.72cm K=0.35 year^−1.The length-weight relationship was estimated as: W=0.00002 L^2.83. The instantaneous rates of total mortality (Z) was estimated by using the Powell-Wetherall plot as 1.82 year^−1. The instantaneous rate of natural mortality was obtained by Pauly equation (M=0.44 year^−1) and the instantaneous rate of fishing mortality (F) estimated from Z-M=1.38 year^−1. |
| format |
article |
| topic_facet |
Biology Fisheries Growth and mortality parameters Thunnus tonggol Persian Gulf Oman Sea Iran |
| author |
Kaymaram, F. Darvishi, M. Behzadi, S. Ghasemi, S. |
| author_facet |
Kaymaram, F. Darvishi, M. Behzadi, S. Ghasemi, S. |
| author_sort |
Kaymaram, F. |
| title |
Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea |
| title_short |
Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea |
| title_full |
Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea |
| title_fullStr |
Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea |
| title_full_unstemmed |
Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea |
| title_sort |
population dynamic parameters of thunnus tonggol (bleeker, 1851) in the persian gulf and oman sea |
| publishDate |
2013 |
| url |
http://hdl.handle.net/1834/37409 |
| work_keys_str_mv |
AT kaymaramf populationdynamicparametersofthunnustonggolbleeker1851inthepersiangulfandomansea AT darvishim populationdynamicparametersofthunnustonggolbleeker1851inthepersiangulfandomansea AT behzadis populationdynamicparametersofthunnustonggolbleeker1851inthepersiangulfandomansea AT ghasemis populationdynamicparametersofthunnustonggolbleeker1851inthepersiangulfandomansea |
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1756079620903403520 |