Unveiling the first steps of juvenile Atlantic goliath grouper Epinephelus itajara (Perciformes: Epinephelidae) in a tropical estuary at the southwestern Atlantic coast

IF 1 4区生物学 Q4 ECOLOGY

Marine Biology Research Pub Date : 2022-07-03 DOI:10.1080/17451000.2022.2119251

Rodrigo Augusto Moreno-Santos, M. Condini, L. L. Almeida, M. Soeth, Á. Bertoncini, M. Hostim-Silva

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Abstract

ABSTRACT The Atlantic goliath grouper Epinephelus itajara is the largest grouper in the Atlantic Ocean, currently classified as vulnerable by IUCN red list. The present study aimed to assess the occurrence of juvenile Atlantic goliath grouper in a tropical estuary on the southeastern Brazilian coast. The sample collections were performed from April to November 2015 and from March 2018 to October 2019. A total of 265 juveniles ranging from 5.4–50.5 cm were sampled, from which 148 individuals were tagged using pit tags. Seventeen (11.5%) of the total tagged individuals were recaptured at least once over time, with two specimens recaptured on two different occasions. Some recaptures occurred in less than a week, while others occurred after six months. The length–weight-relationship of all juveniles resulted in a negative allometric growth pattern. These findings suggest that the estuary represents a suitable and important habitat for juvenile Atlantic goliath grouper.

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在大西洋西南海岸的热带河口揭开幼年大西洋歌利亚石斑鱼的第一步

大西洋巨石斑鱼(Epinephelus itajara)是大西洋最大的石斑鱼，目前被世界自然保护联盟列为濒危物种红色名录。本研究旨在评估大西洋歌利亚石斑鱼幼鱼在巴西东南海岸热带河口的发生情况。样本采集时间分别为2015年4月至11月和2018年3月至2019年10月。共采集幼鱼265条，体长5.4 ~ 50.5 cm，其中148条进行了坑标记。有17只(11.5%)被标记的个体在一段时间内至少被重新捕获一次，其中2只样本在两个不同的场合被重新捕获。一些人在不到一周的时间内就被抓回，而另一些人则在六个月后才被抓回。所有幼鱼的长-重关系导致负异速生长模式。这些发现表明，河口是大西洋歌利亚石斑鱼幼鱼适宜的重要栖息地。

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来源期刊

Marine Biology Research 生物-海洋与淡水生物学

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Marine Biology Research (MBRJ) provides a worldwide forum for key information, ideas and discussion on all areas of marine biology and biological oceanography. Founded in 2005 as a merger of two Scandinavian journals, Sarsia and Ophelia, MBRJ is based today at the Institute of Marine Research, Bergen, Norway. The Journal’s scope encompasses basic and applied research from all oceans and marine habitats and on all marine organisms, the main criterium for acceptance being quality.