This study examines for the first time the biology of alfonsino (Beryx splendens) from three small seamounts of the Sierra Leone Rise (SLR), an unexploited and fragile ecosystem in the Atlantic, using data from an experimental survey carried out in 2001 by Spanish longliners. In general, the lack of rigorous baseline data limits the implementation of efficient management and conservation plans in fisheries strategies. Therefore, the main aim of present study was to provide baseline information on basic biological parameters of the alfonsino population associated with an unexploited ecosystem. A total of 17296 individuals of alfonsino were sampled from SLR. Alfonsino is gonochoric and presented an unbalanced sex ratio, there were significantly more females than males. Taking into account the results in stage of maturity of alfonsino and the gonadosomatic index values during studied period, we can conclude that at least one reproductive period in these seamounts was in the late spring and early summer. The spawning stage was attained at a minimum fork length of 23 and 25 cm for males and females, respectively. The size at which 50% of the population attains sexual maturity was approximately 28 and 27 cm for males and females, respectively. The stock structure of alfonsino showed a segregation of the size with the depth, as they increase in size they move into the deeper water.

本研究首次考察了阿方西诺 ( Beryx splendens)的生物学特性。) 来自塞拉利昂隆起 (SLR) 的三个小海山，这是大西洋中一个未开发且脆弱的生态系统，使用的是西班牙延绳钓者在 2001 年进行的一项实验调查的数据。总的来说，缺乏严格的基线数据限制了渔业战略中有效管理和保护计划的实施。因此，本研究的主要目的是提供与未开发生态系统相关的 alfonsino 种群基本生物学参数的基线信息。从 SLR 中总共抽取了 17296 名 alfonsino 个体。阿方西诺是淋病，性别比例不平衡，女性明显多于男性。考虑到研究期间阿方索成熟阶段的结果和性腺指标值，我们可以得出结论，这些海山至少有一个繁殖期是在春末夏初。雄性和雌性的最小叉长分别为 23 和 25 厘米时达到产卵阶段。50% 的人口达到性成熟的大小分别为雄性和雌性约 28 厘米和 27 厘米。alfonsino 的种群结构显示出大小与深度的分离，随着它们的大小增加，它们会移入更深的水中。