Research Article: Population dynamics and fishery status of Trichiurus lepturus (Largehead hairtail) in the northern waters of the Oman Sea (Sistan and Baluchestan waters, Iran)
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引用次数: 0
Abstract
Population dynamics and fishery status of Trichiurus lepturus were estimated by landings data on the northern waters of the sea of Oman (Sistan and Baluchestan Province, Iran). A total of more than 3000 fish samples were weighted and measured during one-year study period (October 2016 to September 2017), the growth indices were obtained as follow: L∞=176 cm, K=0.5 (yr -1 ), to=-0.2 year, M=0.67(yr -1 ), F=3.52 (yr -1 ), Z=4.19 (yr -1 ), and E=0.85, respectively. Exploitation rate (U), 0.53, annual total stock at the beginning of the year (Bv), 32264 t, Annual average standing stock (B), 4827 t, Maximum Constant Yield (MCY),10260 t, maximum sustainable yield (MSY),15390 t, fishing mortality rate that maximizes equilibrium yield per recruit, Fmax: 0.8 and Exploitation ratio maximum sustainable yield, Emsy: 0.54 were calculated for this species. Results of this study showed exploitation ratio of the Largehead hairtail stock is overfishing and decreasing of exploitation rate proposed.
期刊介绍:
1- Living various species (contains animals and vegetal species) in various aquatic ecosystems.
2- Health and diseases of aquatic species.
3- Determining the stocks and specific time and location for catching and reliable exploitation for sustainable development.
4- Methods of propagation and culture of high value aquatic resources.
5- Aquatic stock assessment and the methods of restocking the high value species and suggestion for rate, areas and the time for releasing fish and other aquatic organisms fries.
6- Pollutant agents and their effects to the environments of aquatic species.
7- Feed and feeding in aquatic organisms.
8- Fish processing and producing new products.
9- The economic and social aspects of fisheries.