在土耳其马尔马拉海利用冬季鱼类浮游生物采样估算沙丁鱼(Sardina pilchardus)产卵种群生物量和产卵区域

Ismail Burak Daban, Yusuf Şen, Alkan Öztekin, A. Ayaz, Uğur Altınağaç, A. İşmen, A. Yüksek, Uğur Özekinci, Fikret Çakır, Tekin Demirkıran, Gençtan Erman Uğur, O. Ayaz, Büminhan Burkay Selçuk
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引用次数: 0

摘要

在马尔马拉海的 32 个站点,通过冬季鱼类浮游生物取样,研究了沙丁鱼的产卵区和产卵鱼群生物量。经计算,单位面积内的平均鱼卵和幼体生物量分别为 18.4 ± 5.3 颗/10 平方米和 2.5 条/10 平方米。检测到的三个主要产卵区分别为卡拉卡贝洪泛区、戈能区和比尤克切克梅斯河口区。幼虫主要分布在西部地区。沙丁鱼的批次繁殖力在 2415.9 到 16738.3 之间,平均为 6899.8 ± 255.7 个卵。经计算,马尔马拉海的性比(R)、产卵率(S)、死亡率和日产卵量(Po)分别为 0.53、0.098、0.62 和 9.25 卵/平方米。马尔马拉海的产卵群生物量(B)估计为 2998 吨。鱼类浮游生物生物量和产卵鱼群生物量都相对较低。建议对沙丁鱼种群的可持续性实施更严格的管理制裁。
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Estimation of spawning stock biomass and spawning areas of sardine, (Sardina pilchardus) with winter time ichthyoplankton sampling in the Sea of Marmara, Türkiye
The spawning areas and spawning stock biomass of sardine were studied with ichthyoplankton sampling in the winter period from the 32 stations, in the Marmara Sea. The mean fish egg and larvae biomass in a unit area were calculated as 18.4 ± 5.3 eggs/10 m2 and 2.5 larvae/10 m2, respectively. Three main spawning areas were detected as Karacabey Floodplain area, Gönen, and Büyükçekmece estuarine area. The larvae are mostly located in the western part. The batch fecundity of sardine was detected between 2415.9 and 16738.3, with a mean of 6899.8 ± 255.7 eggs. The sex ratio (R), spawning fraction (S), mortality rate, and daily egg production (Po) were calculated as 0.53, 0.098, 0.62, and 9.25 eggs/m2 in the Marmara Sea. The spawning stock biomass (B) is estimated at 2998 tonnes in the Marmara Sea. Both ichthyoplankton biomass and spawning stock biomass were found relatively lower. It is recommended to apply stricter management sanctions for the sustainability of sardine stocks.
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