关于巴西亚马逊大陆架上南方红鲷-Lutjanus purpureus (Poey, 1866)产卵模式的最新发现和渔业管理建议

Fishes Pub Date : 2024-04-15 DOI:10.3390/fishes9040136
Larissa da Costa Pinheiro, Beatrice Padovani Ferreira, Paulo Emílio Santos, U. Peixoto, Bianca Bentes
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引用次数: 0

摘要

南方红鲷鱼(Lutjanus purpureus)是亚马逊大陆架的主要渔业资源之一。由于对重量小于 900 克的标本需求量大,对这一规格等级的捕捞力度加大,导致渔获量急剧下降。本研究基于对雌性性腺细胞结构(卵母细胞和其他生殖组织的形成)的分析,以确定生殖过程并评估当前渔业管理措施的有效性。排卵后卵泡(POFs)的出现在四月份达到高峰,这一时期被解释为产卵密集期。除 POFs 外,水合卵母细胞也在 7 月达到高峰,根据闭锁卵母细胞和闭锁期的存在情况,这表明生殖的连续性或第二个高峰期。鉴于当地的笛鲷渔业优先捕捞非常年轻的个体,建议将禁渔期从 3 月延长至 7 月,以保证产卵种群的繁殖潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Recent Findings on Spawning Patterns and Recommendations for the Fishery Management of the Southern Red Snapper—Lutjanus purpureus (Poey, 1866)—On the Amazon Continental Shelf of Brazil
The southern red snapper, Lutjanus purpureus, is one of the primary fishery resources of the Amazon continental shelf. Due to the demand for specimens of less than 900 g in weight, increased fishing effort focusing on this size class has led to a drastic decrease in catches. The present study was based on the analysis of cellular structures in the female gonads (formation of oocytes and other reproductive tissues) to identify reproductive processes and evaluate the effectiveness of current fishery management practices. The presence of postovulatory follicles (POFs) peaked in April, which was interpreted as a period of intense spawning. In addition to POFs, hydrated oocytes peaked in July, indicating either reproductive continuity or a second peak, based on the presence of atretic oocytes and atresia. Given that the local snapper fishery preferentially targets very young individuals, an extension of the closed season from March to July would be recommendable to guarantee the reproductive potential of the spawning stock.
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