Movement Patterns and Growth Rate of Scotsman Polysteganus praeorbitalis (Sparidae) Tagged in the Pondoland Marine Protected Area, Eastern Cape, South Africa

IF 0.6 4区生物学 Q4 ZOOLOGY

African Zoology Pub Date : 2023-01-02 DOI:10.1080/15627020.2023.2170717

B. Mann, W. Dalton, G. Jordaan, R. Daly

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引用次数: 1

Abstract

A tag-recapture study was undertaken on Polysteganus praeorbitalis in the Pondoland Marine Protected Area (PMPA) on the east coast of South Africa. A total of 1 042 fish were tagged over a period of 16 years and 255 individuals (24.5%) were recaptured, some of them on multiple occasions. Data analysis showed that 84.7% of recaptured fish remained in relatively small home ranges (∼750 m linear distance), while 13.3% abandoned their home ranges and undertook unidirectional movements (of 21–1 211 km) along the KwaZulu-Natal coast in a north-easterly direction, most likely to spawn. While the no-take area of the PMPA provides effective protection for resident fish, the export of adult P. praeorbitalis provides strong evidence of the benefits that no-take MPAs can offer to adjacent fisheries. Based on the tag-recapture length data, the growth rate was found to be relatively slow, averaging 46 mm y–1. This growth rate was similar to that determined by a study of ageing using sectioned otoliths. Reliable tag-recapture data can thus be used to provide a valuable means of validating growth rates determined by other methods.

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南非东开普省庞多兰海洋保护区苏格兰褐蝽(Sparidae)的运动模式和生长速度

对南非东岸庞多兰海洋保护区(PMPA)的前眼圈多爪龙(Polysteganus preeorbitalis)进行了标签捕获研究。在16年的时间里，共捕获了1 042条鱼，其中255条(24.5%)被重新捕获，其中一些是多次捕获。数据分析显示，84.7%被捕获的鱼类仍停留在相对较小的活动范围内(约750米的线性距离)，而13.3%的鱼类放弃了活动范围，沿着夸祖鲁-纳塔尔省海岸向东北方向单向移动(21-1 211公里)，最有可能产卵。虽然禁捕区为居民鱼类提供了有效的保护，但成鱼的出口有力地证明了禁捕区可以给邻近渔业带来的好处。根据标签捕获长度数据，发现生长速度相对较慢，平均为46 mm - 1。这一增长速度与一项利用耳石切片进行的衰老研究得出的结果相似。因此，可靠的标签重新捕获数据可用于验证由其他方法确定的生长速率的有价值的手段。

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

African Zoology 生物-动物学

CiteScore

2.60

自引率

9.10%

发文量

审稿时长

>12 weeks

期刊介绍： African Zoology , a peer-reviewed research journal, publishes original scientific contributions and critical reviews that focus principally on African fauna in terrestrial, freshwater, and marine ecosystems. Research from other regions that advances practical and theoretical aspects of zoology will be considered. Rigorous question-driven research in all aspects of zoology will take precedence over descriptive research. The Journal publishes full-length papers, critical reviews, short communications, letters to the editors as well as book reviews. Contributions based on purely observational, descriptive or anecdotal data will not be considered. The Journal is produced by NISC in association with the Zoological Society of South Africa (ZSSA). Acceptance of papers is the responsibility of the Editors-in-Chief in consultation with the Editors and members of the Editorial Advisory Board. All views expressed are those of the author and not necessarily those of the Editors or the Department.