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首页> 外文期刊>Research Journal of Fisheries and Hydrobiology >Age, Growth, Mortality and Exploitation Rates of Round Sardinella, Sardinella aurita from the East Mediterranean Sea (North Sinai Coast)
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Age, Growth, Mortality and Exploitation Rates of Round Sardinella, Sardinella aurita from the East Mediterranean Sea (North Sinai Coast)

机译：东地中海（北西奈海岸）圆形沙丁鱼和沙丁鱼的年龄，生长，死亡率和剥削率

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摘要

Age, growth, Mortality and exploitation rates of Sardinella auritawere estimated from6591specimens ranging from 7 to 22.9 cm as Lt, while the mean total weight ranged from 4.3 to 75 gm.The relationship between length and weight was described by the power relationship: W = 0.0267 L2.524.Growth in length and growth in weight at the end of each year was calculated. Age was determined byscales and age groups 0 to 4 years. Obtained von Bertalanffy growth parametres (L4 = 25.83 cm,0 k = 0.299 year!1 and t = !0.878 year). The growth performance index was calculated (?= 2.29). Total(Z: 1.49 yr!1 ), natural (M: 0.73 yr!1 ) and fishing mortality (F: 0.76yr!1) were obtained. The maximummax allowable limit of exploitation (E ) was 0.87 and maximum economic yield was 0.71. The estimatedvalues for the total mortality and the exploitation rate (E = 0.51), show that the round sardinella stockin the east Mediterranean Sea, North Sinai coast is balanced position.
机译：沙丁鱼的年龄，生长，死亡率和开垦率估计为6591个标本，Lt为7至22.9 cm，平均总重量为4.3至75 gm。长度与重量之间的关系由幂关系表示：W = 0.0267 L2.524。计算每年年底的长度增长和体重增长。年龄由体重计和0至4岁年龄组确定。获得von Bertalanffy生长参数（L4 = 25.83 cm，0 k = 0.299年！1，t =！0.878年）。计算出生长性能指数（η＝ 2.29）。获得了总计（Z：1.49 yr！1），自然（M：0.73 yr！1）和捕捞死亡率（F：0.76yr！1）。最大最大允许开采极限（E）为0.87，最大经济收益为0.71。总死亡率和利用率的估计值（E = 0.51）表明，东地中海，北西奈海岸的沙丁鱼圆形种群处于平衡位置。

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