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)

IF 0.8 4区 农林科学 Q3 FISHERIES
S. A. T. Motlagh, S. Hashemi, M. Mirzaei
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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.
研究论文:阿曼海北部海域(伊朗锡斯坦和俾路支斯坦海域)lepturus(大头带鱼)种群动态和渔业现状
利用阿曼海北部海域(伊朗锡斯坦和俾路支斯坦省)的登陆数据估计了lepturus的种群动态和渔业状况。在2016年10月至2017年9月为期1年的研究期间,对3000余份鱼类样本进行称重测量,得到的生长指数分别为: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), E=0.85。计算该鱼种的渔获率(U)为0.53,年初年总资源量(Bv)为32264 t,年平均常存量(B)为4827 t,最大恒定产量(MCY)为10260 t,最大可持续产量(MSY)为15390 t,最大均衡产量的渔获死亡率(Fmax)为0.8,最大可持续产量(Emsy)为0.54。研究结果表明,我国大头带鱼资源的开采率存在过度捕捞现象,并提出了降低开采率的建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.30
自引率
11.10%
发文量
0
审稿时长
3 months
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.
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