Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea
The population parameters and spawning season of the Spangled emperor (Lethrinus nebulosus) were studied in coastal waters of Hormozgan province. The monthly calculated mean values of gonadosomatic index (GSI) of females were indicate to increase from February, reach the highest in March and decline in June. The spawning season peak of L. nebulosus occurred in March. The Von Bertalanffy growth parameters, L∞, K and t0 were estimated as, 67.2cm, 0.16.year^-1 and -1.161 year, respectively. The relationship between weight and length (Fork Length) can be expressed as W=0.051 L^2.722, which indicates that Spangled Emperor has negative allometric growth. Using length converted catch curve, total mortality (Z) was estimated as 1.13 year^-1 and natural mortality was estimated using Pauly's equation, as 0.57 per year. Finally, the fishing mortality (F) was 0.56, which gives an exploitation rate (E) of 0.50.
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Language: | English |
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2010
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Subjects: | Biology, Fisheries, Lethrinus nebulosus, Spawning, Growth parameters, Mortality rates, Hormozgan Province, Persian Gulf, Oman Sea, Iran, |
Online Access: | http://hdl.handle.net/1834/37144 |
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dig-aquadocs-1834-371442021-07-04T03:25:52Z Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea Taghavi Motlagh, S.A. Vahabnezhad, A. Seyfabadi, S.J. Ghodrati Shojaei, M. Hakimelahi, M. Biology Fisheries Lethrinus nebulosus Spawning Growth parameters Mortality rates Hormozgan Province Persian Gulf Oman Sea Iran The population parameters and spawning season of the Spangled emperor (Lethrinus nebulosus) were studied in coastal waters of Hormozgan province. The monthly calculated mean values of gonadosomatic index (GSI) of females were indicate to increase from February, reach the highest in March and decline in June. The spawning season peak of L. nebulosus occurred in March. The Von Bertalanffy growth parameters, L∞, K and t0 were estimated as, 67.2cm, 0.16.year^-1 and -1.161 year, respectively. The relationship between weight and length (Fork Length) can be expressed as W=0.051 L^2.722, which indicates that Spangled Emperor has negative allometric growth. Using length converted catch curve, total mortality (Z) was estimated as 1.13 year^-1 and natural mortality was estimated using Pauly's equation, as 0.57 per year. Finally, the fishing mortality (F) was 0.56, which gives an exploitation rate (E) of 0.50. Article includes abstract in Farsi on last page. 2021-06-24T18:03:52Z 2021-06-24T18:03:52Z 2010 article TRUE 1562-2916 http://hdl.handle.net/1834/37144 en http://www.ifro.ir application/pdf application/pdf 161-172 http://aquaticcommons.org/id/eprint/22363 18721 2018-03-28 21:54:46 22363 Iranian Fisheries Science Research Institute |
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Biology Fisheries Lethrinus nebulosus Spawning Growth parameters Mortality rates Hormozgan Province Persian Gulf Oman Sea Iran Biology Fisheries Lethrinus nebulosus Spawning Growth parameters Mortality rates Hormozgan Province Persian Gulf Oman Sea Iran |
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Biology Fisheries Lethrinus nebulosus Spawning Growth parameters Mortality rates Hormozgan Province Persian Gulf Oman Sea Iran Biology Fisheries Lethrinus nebulosus Spawning Growth parameters Mortality rates Hormozgan Province Persian Gulf Oman Sea Iran Taghavi Motlagh, S.A. Vahabnezhad, A. Seyfabadi, S.J. Ghodrati Shojaei, M. Hakimelahi, M. Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea |
description |
The population parameters and spawning season of the Spangled emperor (Lethrinus nebulosus) were studied in coastal waters of Hormozgan province. The monthly calculated mean values of gonadosomatic index (GSI) of females were indicate to increase from February, reach the highest in March and decline in June. The spawning season peak of L. nebulosus occurred in March. The Von Bertalanffy growth parameters, L∞, K and t0 were estimated as, 67.2cm, 0.16.year^-1 and -1.161 year, respectively. The relationship between weight and length (Fork Length) can be expressed as W=0.051 L^2.722, which indicates that Spangled Emperor has negative allometric growth. Using length converted catch curve, total mortality (Z) was estimated as 1.13 year^-1 and natural mortality was estimated using Pauly's equation, as 0.57 per year. Finally, the fishing mortality (F) was 0.56, which gives an exploitation rate (E) of 0.50. |
format |
article |
topic_facet |
Biology Fisheries Lethrinus nebulosus Spawning Growth parameters Mortality rates Hormozgan Province Persian Gulf Oman Sea Iran |
author |
Taghavi Motlagh, S.A. Vahabnezhad, A. Seyfabadi, S.J. Ghodrati Shojaei, M. Hakimelahi, M. |
author_facet |
Taghavi Motlagh, S.A. Vahabnezhad, A. Seyfabadi, S.J. Ghodrati Shojaei, M. Hakimelahi, M. |
author_sort |
Taghavi Motlagh, S.A. |
title |
Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea |
title_short |
Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea |
title_full |
Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea |
title_fullStr |
Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea |
title_full_unstemmed |
Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea |
title_sort |
growth, mortality and spawning season of the spangled emperor (lethrinus nebulosus forsskal, 1775) in coastal waters of hormozgan province in the persian gulf and oman sea |
publishDate |
2010 |
url |
http://hdl.handle.net/1834/37144 |
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