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Demographics of great sturgeon () in Iranian waters of the Caspian Sea (2008–2010)
Oceanological and Hydrobiological Studies ( IF 0.9 ) Pub Date : 2021-08-31 , DOI: 10.2478/oandhs-2021-0027
Shima Bakhshalizadeh 1 , Ali Bani 1, 2 , Shahram Abdolmalaki 3 , Jesus T. Ponce Palafox 4
Affiliation  

Demographic data of the great sturgeon, Huso huso, from the Iranian coastal waters of the Caspian Sea were derived from measurements of individuals with a fork length ranging from 84 to 255 cm, obtained from commercial fisheries. The maximum age of fish caught in the south Caspian Sea was 30 years. The estimates of the asymptotic length L∞ and the growth coefficient (K) were 265.255 cm and 0.062 per year for males and 275.78 cm and 0.08 per year for females, respectively. Total mortality rates obtained by Gulland's method were larger for males (0.64) than for females (0.46). Annual mortality rates were calculated as 47% for males and 37% for females. Data obtained in this study and their comparison with data from previous studies indicate that the great sturgeon stock is definitely exploited in an unsustainable manner.

中文翻译:

伊朗里海水域的大鲟鱼种群统计 (2008-2010)

来自伊朗里海沿岸水域的大鲟鱼 Huso huso 的人口统计数据来自对从商业渔业获得的叉长为 84 至 255 厘米的个体的测量值。在南里海捕获的鱼的最大年龄为 30 年。渐近长度 L∞ 和增长系数 (K) 的估计值分别为男性每年 265.255 cm 和 0.062,女性每年分别为 275.78 cm 和 0.08。通过 Gulland 方法获得的总死亡率男性(0.64)大于女性(0.46)。男性的年死亡率为 47%,女性为 37%。本研究中获得的数据及其与先前研究数据的比较表明,大鲟鱼种群肯定以不可持续的方式被开发。
更新日期:2021-08-31
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