Population structure and reproductive aspects of Callinectes ornatus (Decapoda: Brachyura) present in the bycatch of shrimp fisheries in northeastern Brazil

IF 1.1 4区生物学 Q4 ANATOMY & MORPHOLOGY

Acta Zoologica Pub Date : 2024-05-28 DOI:10.1111/azo.12508

Josafá Reis‐Júnior, Leonardo Cruz da Rosa, Kátia Meirelles Felizola Freire

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Abstract

This study aimed at analysing the population structure and reproductive aspects of Callinectes ornatus present in the bycatch of shrimp fisheries off Sergipe (northeastern Brazil), and at comparing the findings with other regions. Samples were obtained monthly from shrimp trawlers based in the Pirambu municipality (11°S–37°W) from May/2015 to May/2016. Each specimen of C. ornatus was separated, identified and weighed (TW, total weight, g). Carapace length (CL, mm) and width (CW, not including lateral spines, mm) were measured, and the sex and stage of morphological maturity were identified. A total of 403 females and 427 males of C. ornatus were found and analysed. The overall sex ratio did not differ from 1:1. Males were larger and heavier than females. Biometric relations (CL‐CW and TW‐CW) were different between sexes. The size at first morphological maturity (CWm) was 38.20 mm for females and 44.00 mm for males. The reproductive and recruitment periods were continuous, with some peaks throughout the year. Despite C. ornatus being a frequent species in shrimp bycatch, its exploitation status is still unknown.

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巴西东北部对虾渔业兼捕渔获物中的金眼鲷(十足目: Brachyura)的种群结构和繁殖情况

本研究旨在分析塞尔希培（巴西东北部）对虾渔业副渔获物中的Callinectes ornatus的种群结构和繁殖情况，并将研究结果与其他地区进行比较。从2015年5月至2016年5月，每月从皮兰布市（南纬11°-西经37°）的拖网捕虾船上获取样本。对每只 C. ornatus 标本进行分离、鉴定和称重（TW，总重量，克）。测量甲壳长度（CL，毫米）和宽度（CW，不包括侧刺，毫米），并确定性别和形态成熟阶段。共发现并分析了 403 只雌性和 427 只雄性鸟枪鱼。总体性别比例与 1:1 没有差异。雄性比雌性更大更重。雌雄的生物计量关系（CL-CW 和 TW-CW）不同。雌性和雄性的形态初熟尺寸（CWm）分别为 38.20 毫米和 44.00 毫米。繁殖期和招募期是连续的，全年都有一些高峰期。尽管眶虾是对虾副渔获物中的常见物种，但其开发利用状况仍不清楚。

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来源期刊

Acta Zoologica 生物-动物学

CiteScore

2.90

自引率

8.30%

发文量

审稿时长

>12 weeks

期刊介绍： Published regularly since 1920, Acta Zoologica has retained its position as one of the world''s leading journals in the field of animal organization, development, structure and function. Each issue publishes original research of interest to zoologists and physiologists worldwide, in the field of animal structure (from the cellular to the organismic level) and development with emphasis on functional, comparative and phylogenetic aspects. Occasional review articles are also published, as well as book reviews.

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