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首页> 外文期刊>Belgian Journal of Zoology >Marked interannual differences in reproductive parameters and daily egg production of anchovy in the northern Aegean Sea
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Marked interannual differences in reproductive parameters and daily egg production of anchovy in the northern Aegean Sea

机译：爱琴海北部of鱼生殖参数和日产卵的年际差异显着

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摘要

In the present paper, an overview of the application of the Daily Egg Production Method (DEPM) to the northern Aegean Sea anchovy stock is presented, and reproductive parameters are compared in the framework of ambient oceanographic regimes. The DEPM was applied twice : in June 1993 and June 1995. Data collection was based on bongo-net ichthyoplankton surveys and concurrent adult surveys onboard the commercial fishing fleet. Revised, more precise estimates of the daily egg production are presented based on the inclusion of both eggs and yolksac stages in the estimation procedure (fit of single embryonic mortality curves). Remarkable between-years differences in the daily egg production, batch fecundity and spawning frequency were found. These parameters were significantly higher in June 1993 than in June 1995. In June 1993, waters were colder, less saline and richer in zooplankton compared to 1995. Adult somatic condition and egg size were also higher in June 1993 than in 1995. These findings emphasize the importance of adult prey availability in determining anchovy egg production.
机译：在本文中，概述了每日产蛋方法（DEPM）在爱琴海北部an鱼种群中的应用，并在环境海洋学范围内比较了繁殖参数。 DEPM使用了两次：1993年6月和1995年6月。数据收集是基于邦戈网鱼鳞浮游生物调查和商业捕鱼船队的同期成人调查得出的。在评估程序中将卵和卵黄囊阶段都包括在内，提出了经过修订的更精确的每日产蛋量估计值（单胚死亡率曲线的拟合）。发现每日的产蛋量，批次繁殖力和产卵频率之间存在明显的年际差异。这些参数在1993年6月比1995年6月显着更高。1993年6月，与1995年相比，水域更冷，盐水更少，浮游动物也更丰富。1993年6月的成年人体况和卵大小也比1995年更高。成年猎物可用性在决定of鱼产蛋中的重要性。

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