Seasonal migration of a male Jasus lalandii sub-population

IF 2.2 2区农林科学 Q2 FISHERIES

Fisheries Research Pub Date : 2024-10-10 DOI:10.1016/j.fishres.2024.107201

Danie van Zyl , Grant van der Heever , Andrew Cockcroft , Lutz Auerswald

引用次数: 0

Abstract

Seasonal movement patterns of a sub-population of the West Coast rock lobster (WCRL), Jasus lalandii, in a fisheries-relevant area of South Africa were investigated from 2010 to 2018 by abundance and tag/recapture surveys. A small sub-population (3144 out of 152 914 WCRL analysed) of large male WCRL (carapace length ≥ 75 mm) gathered in a deep (± 200 m) commercial fishing area in January – May, whereas they are rare or absent in the periods between. This distribution was consistent with tagging information from 502 recaptured WCRL (from 15 211 tagged) which revealed an inshore movement (mainly in a NE direction) of a male sub-population (carapace length ≥ 75 mm = legal size) starting in austral autumn. The mean straight-line movement was 30.4 ± 0.6 km (maximum 75 km) and a mean time at large of 301 ± 15 days (maximum 3000 days) were recorded. The study revealed therefore the destination of the lobsters’ migration but not its origin.

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雄性 Jasus lalandii 亚群的季节性迁徙

通过丰度和标签/重捕调查，研究了2010年至2018年南非渔业相关地区西海岸岩龙虾（WCRL）亚种群的季节性移动模式。在1月至5月期间，大型雄性WCRL（体长≥75毫米）的一个小亚群（分析的152 914条WCRL中的3144条）聚集在一个深海（± 200米）商业捕鱼区，而在两者之间的时期则很少或没有。这种分布与从 502 只重新捕获的西罗亚群（从 15 211 只被标记的西罗亚群中捕获）获得的标记信息一致，这些信息显示雄性西罗亚群（腕长≥75 毫米=法定尺寸）从秋季开始向近岸移动（主要向东北方向移动）。平均直线移动距离为 30.4 ± 0.6 千米（最长 75 千米），平均活动时间为 301 ± 15 天（最长 3000 天）。因此，这项研究揭示了龙虾迁移的目的地，但没有揭示其起源。

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

Fisheries Research 农林科学-渔业

CiteScore

4.50

自引率

16.70%

发文量

294

审稿时长

15 weeks

期刊介绍： This journal provides an international forum for the publication of papers in the areas of fisheries science, fishing technology, fisheries management and relevant socio-economics. The scope covers fisheries in salt, brackish and freshwater systems, and all aspects of associated ecology, environmental aspects of fisheries, and economics. Both theoretical and practical papers are acceptable, including laboratory and field experimental studies relevant to fisheries. Papers on the conservation of exploitable living resources are welcome. Review and Viewpoint articles are also published. As the specified areas inevitably impinge on and interrelate with each other, the approach of the journal is multidisciplinary, and authors are encouraged to emphasise the relevance of their own work to that of other disciplines. The journal is intended for fisheries scientists, biological oceanographers, gear technologists, economists, managers, administrators, policy makers and legislators.