Sex and reproduction of the alfonsino Beryx splendens (Pisces, Berycidae) from the Macaronesian archipelagos
Sex and reproduction of the alfonsino Beryx splendens (Pisces, Berycidae) from the Macaronesian archipelagos
复制标题
来自马卡罗尼群岛的金鲹（双鱼座，鲫科）的性别和繁殖
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
M. Pinho
中科院分区：
文献类型：
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作者：
J. González;V. Rico;J. M. Lorenzo;S. Reis;J. G. Pajuelo;M. Dias;A. Mendonça;H. Krug;M. Pinho
总结
本文提供了金目金雀花 (Beryx splendens Lowe, 1834) 繁殖生物学的比较信息，这些物种在亚速尔群岛、马德拉群岛和加那利群岛具有商业价值。共有 846 名来自亚速尔群岛的个体（14.0–42.0 厘米叉长）、621 名来自马德拉群岛的个体（17.2–50.0 厘米叉长）和 643 名来自加那利群岛的个体（18.2–38.9 厘米叉长）用于这项研究。阿金金鱼是雌雄异体，没有两性异形的证据。雌性比雄性多；这种优势可能反映了马卡罗尼群岛中雄性和雌性的空间分布和/或捕获能力的某些差异。马卡罗尼西亚的三个地区的产卵季节不同，繁殖期存在南北差异：亚速尔群岛为 9 月至 3 月，马德拉群岛为 3 月至 6 月，加那利群岛为 7 月至 9 月。马德拉群岛和加那利群岛估计性成熟时的大小相似（叉长分别为 32 厘米和 30 厘米），而亚速尔群岛则达到较小的长度（叉长为 23 厘米）。性成熟时大小的差异可以用每个群岛不同的开发水平来解释。阿金鱼的生活史参数表明，该物种具有特殊的生活史策略，基于该物种的渔业更容易受到过度捕捞和种群枯竭的影响。
Summary
This paper provides comparative information on the reproductive biology of the alfonsino, Beryx splendens Lowe, 1834, species with commercial interest in the Azores, Madeira and the Canary Islands. A total of 846 individuals from Azores (14.0–42.0 cm fork length), 621 from Madeira (17.2–50.0 cm fork length) and 643 from the Canaries (18.2–38.9 cm fork length) were used for the study. The alfonsino is gonochoric with no evidence of sexual dimorphism. Females are more abundant than males; this dominance probably reflects certain differences in the spatial distribution and/or the catchability of males and females in the Macaronesian archipelagos. The spawning season was distinct for the three Macaronesian areas, with an observed North–South variation in the reproductive period: September–March in the Azores, March–June in Madeira and July–September in the Canary Islands. The size at sexual maturity estimated for Madeira and the Canary Islands is similar (32 and 30 cm fork length, respectively), while for the Azores it is reached at smaller length (23 cm fork length). The differences observed in the size at sexual maturity can be explained by the different exploitation levels in each archipelago. Life-history parameters of the alfonsino suggest that this species has a specialistic life-history strategy and fisheries based on this species are more susceptible to growth overfishing and population depletion.