Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China
This study examined the population dynamics and seasonal variation (winter-summer) in the biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China. Key growth parameters were estimated using the von Bertalanffy growth model, revealing an asymptotic...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2024.1515753/full |
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| author | Hagai Nsobi Lauden Shaoliang Lyu Alma Alfatat Happiness Moses Mwemi Jamaluddin Fitrah Alam Ning Chen Xuefeng Wang |
| author_facet | Hagai Nsobi Lauden Shaoliang Lyu Alma Alfatat Happiness Moses Mwemi Jamaluddin Fitrah Alam Ning Chen Xuefeng Wang |
| author_sort | Hagai Nsobi Lauden |
| collection | DOAJ |
| description | This study examined the population dynamics and seasonal variation (winter-summer) in the biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China. Key growth parameters were estimated using the von Bertalanffy growth model, revealing an asymptotic length (L∞) of 505.05 mm and a growth coefficient (K) of 0.26 year-¹, with an estimated longevity of 11.24 years. Mortality analysis showed a total mortality rate (Z) of 0.35 year-¹, primarily driven by natural causes (M = 0.33 year-¹) with minimal fishing impact (F = 0.02 year-¹), resulting in a low exploitation rate (E) of 0.05. Length-weight relationship (LWR) analysis indicated positive allometric growth in females and nearly isometric growth in males, with significant seasonal variations in condition factors (K). Yield Per Recruit (YPR) analysis identified a maximum sustainable exploitation rate (Emax) of 0.421, with a conservative management approach suggested at E0.1 = 0.355. Seasonal variations in reproductive indices, with higher Gonadosomatic Index (GSI) and Hepatosomatic Index (HSI) in winter, highlight the species’ reproductive cycle. The findings suggest that Acanthopagrus schlegelii is stable, with low fishing pressure. Seasonal GSI and HSI variations suggest fisheries management should time fishing to reduce impacts on reproductive success. Maintaining exploitation rates below Emax is essential for sustainable management, contributing valuable insights for fisheries conservation in coastal China. |
| format | Article |
| id | doaj-art-7d32aa7f91f64b3a8a955558c4d64eff |
| institution | Kabale University |
| issn | 2296-7745 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj-art-7d32aa7f91f64b3a8a955558c4d64eff2025-01-13T11:39:39ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452025-01-011110.3389/fmars.2024.15157531515753Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, ChinaHagai Nsobi Lauden0Shaoliang Lyu1Alma Alfatat2Happiness Moses Mwemi3Jamaluddin Fitrah Alam4Ning Chen5Xuefeng Wang6College of Fisheries, Guangdong Ocean University, Zhanjiang, ChinaCollege of Fisheries, Guangdong Ocean University, Zhanjiang, ChinaCollege of Fisheries, Guangdong Ocean University, Zhanjiang, ChinaCollege of Fisheries, Guangdong Ocean University, Zhanjiang, ChinaFaculty of Marine Science and Fisheries, Hasanuddin University, Makassar, IndonesiaCollege of Fisheries, Guangdong Ocean University, Zhanjiang, ChinaCollege of Fisheries, Guangdong Ocean University, Zhanjiang, ChinaThis study examined the population dynamics and seasonal variation (winter-summer) in the biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China. Key growth parameters were estimated using the von Bertalanffy growth model, revealing an asymptotic length (L∞) of 505.05 mm and a growth coefficient (K) of 0.26 year-¹, with an estimated longevity of 11.24 years. Mortality analysis showed a total mortality rate (Z) of 0.35 year-¹, primarily driven by natural causes (M = 0.33 year-¹) with minimal fishing impact (F = 0.02 year-¹), resulting in a low exploitation rate (E) of 0.05. Length-weight relationship (LWR) analysis indicated positive allometric growth in females and nearly isometric growth in males, with significant seasonal variations in condition factors (K). Yield Per Recruit (YPR) analysis identified a maximum sustainable exploitation rate (Emax) of 0.421, with a conservative management approach suggested at E0.1 = 0.355. Seasonal variations in reproductive indices, with higher Gonadosomatic Index (GSI) and Hepatosomatic Index (HSI) in winter, highlight the species’ reproductive cycle. The findings suggest that Acanthopagrus schlegelii is stable, with low fishing pressure. Seasonal GSI and HSI variations suggest fisheries management should time fishing to reduce impacts on reproductive success. Maintaining exploitation rates below Emax is essential for sustainable management, contributing valuable insights for fisheries conservation in coastal China.https://www.frontiersin.org/articles/10.3389/fmars.2024.1515753/fullAcanthopagrus schlegeliicondition factorsexploitation rategonadosomatic indexhepatosomatic indexreproductive indices |
| spellingShingle | Hagai Nsobi Lauden Shaoliang Lyu Alma Alfatat Happiness Moses Mwemi Jamaluddin Fitrah Alam Ning Chen Xuefeng Wang Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China Frontiers in Marine Science Acanthopagrus schlegelii condition factors exploitation rate gonadosomatic index hepatosomatic index reproductive indices |
| title | Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China |
| title_full | Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China |
| title_fullStr | Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China |
| title_full_unstemmed | Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China |
| title_short | Population dynamics and seasonal variation in biological characteristics of black sea bream (Acanthopagrus schlegelii) in Zhanjiang coastal waters, China |
| title_sort | population dynamics and seasonal variation in biological characteristics of black sea bream acanthopagrus schlegelii in zhanjiang coastal waters china |
| topic | Acanthopagrus schlegelii condition factors exploitation rate gonadosomatic index hepatosomatic index reproductive indices |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2024.1515753/full |
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