Reproductive cycle of the temperate sea cucumber Holothuria tubulosa in the northeastern Aegean Sea

IF 1.8 3区农林科学 Q2 FISHERIES

Marine and Coastal Fisheries Pub Date : 2024-08-18 DOI:10.1002/mcf2.10307

Serhat Engin, Mustafa Tolga Tolon, Deniz Günay, Dilek Emiroğlu

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Abstract

Objective

The aim of this study was to determine the reproductive cycle and spawning frequency of the sea cucumber Holothuria tubulosa in the northeastern Aegean Sea.

Methods

The study covered a period of 12 months, beginning in October 2018 and concluding in September 2019. During this period, sea cucumber samples were collected monthly. Macroscopic and histological examinations of gonadal tubules were conducted to provide credible information for fishery management and aquaculture.

Result

The sex ratio of the sampled population was 1:1.3, with 95 males and 130 females. The drained body weights at 50% maturity were 70.90 g for females and 70.80 g for males. The total length at 50% maturity was estimated at 18.58 cm for females and 18.05 cm for males. Gonad maturation was initiated in March and progressed to spawning stages between July and August. From September to February, the gonads were in postspawning and recovery stages. A strong linear correlation was determined between the gonad index and the seawater temperature in the area.

Conclusion

The information provided is expected to improve stock management, enforce fishery regulations, and support controlled breeding programs. These measures aim to preserve the natural populations of Holothuria tubulosa and guarantee the long-term viability of the species in the wild.

Abstract Image

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爱琴海东北部温带海参Holothuria tubulosa的繁殖周期

目标本研究旨在确定爱琴海东北部海参Holothuria tubulosa的繁殖周期和产卵频率。研究方法这项研究从 2018 年 10 月开始，到 2019 年 9 月结束，为期 12 个月。在此期间，每月收集海参样本。对性腺小管进行了宏观和组织学检查，以便为渔业管理和水产养殖提供可靠信息。结果采样种群的性别比例为 1:1.3，其中雄性 95 只，雌性 130 只。雌鱼和雄鱼在 50%成熟时的体重分别为 70.90 克和 70.80 克。据估计，50%成熟时的总长度雌性为 18.58 厘米，雄性为 18.05 厘米。性腺成熟期从 3 月开始，7 月至 8 月间进入产卵期。从 9 月到次年 2 月，性腺处于产卵后和恢复阶段。性腺指数与该地区的海水温度之间存在很强的线性相关。结论所提供的信息有望改善种群管理、执行渔业法规和支持受控繁殖计划。这些措施旨在保护管圆吻鲈的自然种群，保证该物种在野外的长期生存能力。

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

Marine and Coastal Fisheries FISHERIES-MARINE & FRESHWATER BIOLOGY

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

>12 weeks

期刊介绍： Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science publishes original and innovative research that synthesizes information on biological organization across spatial and temporal scales to promote ecologically sound fisheries science and management. This open-access, online journal published by the American Fisheries Society provides an international venue for studies of marine, coastal, and estuarine fisheries, with emphasis on species'' performance and responses to perturbations in their environment, and promotes the development of ecosystem-based fisheries science and management.