Movement patterns and underestimation of the maximum age of a Vulnerable endemic guitarfish species inferred from mark-recapture studies

IF 1.4 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

African Journal of Marine Science Pub Date : 2023-07-06 DOI:10.2989/1814232X.2023.2224829

T. Murray, C. Elston, R. Bennett, A. Childs, P. Cowley

引用次数: 0

Abstract

Data collected from mark-recapture programmes have proven invaluable in assessing the movements and growth of numerous fishery species along the South African coastline. This short note reports on tag and recapture information on the Vulnerable endemic lesser guitarfish Acroteriobatus annulatus. This species appears to exhibit site-affinity behaviour, with an observed mean distance moved of 38.5 km (SD 121.4, range 0–726 km). The recapture of two individuals (tagged as adults; ∼100 cm total length) 6 and 12 years after tagging suggests that the maximum age for this species is likely more than double the current maximum recorded age of 7 years (estimated from vertebral ring counts). This has major implications for the management of this bycatch species (with a declining population trend), and for other guitarfish species occurring in South Africa for which the maximum age is currently unknown.

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从标记再捕获研究中推断的一种脆弱的地方性吉他鱼物种的运动模式和最大年龄的低估

事实证明，从标记再捕获方案收集的数据对于评估南非海岸线沿线众多渔业物种的移动和生长非常宝贵。这篇短文报道了易受伤害的地方性小吉他鱼的标记和重捕信息。该物种表现出位点亲和行为，观测到的平均移动距离为38.5 km (SD 121.4，范围0-726 km)。重新捕获两个个体(标记为成年;标记后6年和12年，表明该物种的最大年龄可能是目前记录的最大年龄7年的两倍多(根据椎环计数估计)。这对这一副渔获物种的管理(种群数量呈下降趋势)以及南非其他最大年龄目前未知的吉他鱼物种具有重大影响。

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 Journal of Marine Science 生物-海洋与淡水生物学

CiteScore

2.60

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： The African (formerly South African) Journal of Marine Science provides an international forum for the publication of original scientific contributions or critical reviews, involving oceanic, shelf or estuarine waters, inclusive of oceanography, studies of organisms and their habitats, and aquaculture. Papers on the conservation and management of living resources, relevant social science and governance, or new techniques, are all welcomed, as are those that integrate different disciplines. Priority will be given to rigorous, question-driven research, rather than descriptive research. Contributions from African waters, including the Southern Ocean, are particularly encouraged, although not to the exclusion of those from elsewhere that have relevance to the African context. Submissions may take the form of a paper or a short communication. The journal aims to achieve a balanced representation of subject areas but also publishes proceedings of symposia in dedicated issues, as well as guest-edited suites on thematic topics in regular issues.