Reproductive cycle and sexual maturity size of landed Selene peruviana (Perciformes: Carangidae) on the coasts of the Ecuadorian Pacific

IF 0.5 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY Ciencias Marinas Pub Date : 2023-06-13 DOI:10.7773/cm.y2023.3363

Kléver Mendoza-Nieto, Mila C-Soriguer Escofet, M. Carrera-Fernández

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Abstract

The Peruvian moonfish (Selene peruviana) is an important fisheries resource that is landed in the main fishing harbors of Ecuador. At the local level, little information is available regarding the biology of this species, which hinders the development of management plans. The present study evaluates the reproductive characteristics of S. peruviana such as the size at sexual maturity and reproductive cycle. Specimens were obtained from artisanal and industrial catches from January 2017 to December 2018. The morphometric characteristics, sex, and maturity stage of 886 specimens were determined, and the gonadosomatic index (GSI), hepatosomatic index (HSI), and relative condition factor (Kn) were estimated. The length-weight relationship and length at sexual maturity (L50) were evaluated with an allometry equation and multi-model analyses, respectively. The mean capture size (total length, TL) was 23.62 cm for males and 22.97 cm for females. A sex ratio (M:F) of 0.70:1.00 (χ2 = 26.28, P < 0.05) was obtained. The allometric factor of the length-weight relationship for both sexes (b) was 2.63 (t = 12.16, P < 0.05), and the coefficient of determination (r2) was 0.89, which suggests that negative allometric growth was present. The L50 (TL) was estimated to be 22.61, 23.86, and 23.27 cm for males, females, and sexes combined, respectively. The monthly GSI, HSI, and Kn values were significantly different (K-W, P < 0.05) among study months. The maximum GSI values were observed in February and March, which constituted the period of highest reproductive activity. The HSI and Kn values exhibited similar trends. The size at sexual maturity was similar to the average catch size, which could indicate that S. peruviana is currently at the limit of its optimal catch size.

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厄瓜多尔太平洋海岸登陆的海雀的生殖周期和性成熟大小

秘鲁月鱼(Selene peruviana)是厄瓜多尔主要渔港的重要渔业资源。在地方一级，关于这一物种的生物学资料很少，这妨碍了管理计划的制定。本研究评估了秘鲁沙蚕的生殖特征，如性成熟时的大小和生殖周期。2017年1月至2018年12月从手工和工业捕捞中获得标本。测定886只标本的形态特征、性别和成熟期，并估算其性腺指数(GSI)、肝体指数(HSI)和相对条件因子(Kn)。利用异速生长方程和多模型分析分别评价了长度-重量关系和性成熟长度(L50)。平均捕获大小(总长度，TL)雄性为23.62 cm，雌性为22.97 cm。性别比(M:F)为0.70:1.00 (χ2 = 26.28, P < 0.05)。两性长重关系的异速生长因子(b)为2.63 (t = 12.16, P < 0.05)，决定系数(r2)为0.89，表明存在负异速生长。L50 (TL)雄性为22.61 cm，雌性为23.86 cm，两性合为23.27 cm。各月GSI、HSI、Kn值差异有统计学意义(K-W, P < 0.05)。2月和3月GSI值最大，是繁殖活性最高的时期。HSI和Kn值表现出相似的变化趋势。性成熟时的渔获量与平均渔获量相近，说明秘鲁海螺目前处于最佳渔获量的极限。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ciencias Marinas 生物-海洋与淡水生物学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： A bilingual open-access publication, Ciencias Marinas (CM) is an international peer-reviewed journal that contains original research findings in all areas of marine science. It is published quarterly by the Autonomous University of Baja California, Mexico, and all its contents are publicly available on our journal website. Though a limited number of copies are still printed, the journal is mainly distributed in its electronic format. CM was conceived in 1973 as part of an academic project aimed to entice local researchers to publicly disclose their findings by adopting the culture of peer-review publishing. This academic project evolved into an international journal after accepting papers from researchers in the United States and, eventually, other parts of the world. Because of the diversity in authorship, CM issues were initially published in either Spanish or English, and occasionally in both languages. It was not until 1984 when CM included both language versions of all its contents, and it then became the fully bilingual journal it still is today. At CM we believe our inclusive format allows us not only to address a wider range of submissions from international authors but also to make published findings available to a wider international audience. So whether you are looking for information on the redfish in Icelandic waters or the physical and biological properties of the Gulf of California, feel free to peruse CM contents. You may find them to provide source material for your research.