南非特有Telepost开普Knifejaw Oplegnathus conwayi的年龄和生长

IF 0.6 4区生物学 Q4 ZOOLOGY

African Zoology Pub Date : 2022-01-02 DOI:10.1080/15627020.2022.2035254

R. Foster, A. Childs, B. Mann, W. Potts

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引用次数: 1

摘要

南非的鱼叉渔业针对的是各种数据不足的物种，因此管理不善。这项研究旨在描述其中一种物种的年龄和生长，即南非南部和东部海岸特有的开普刀颌Oplegnathus conwayi。通过研究性鱼叉捕鱼（n=170）收集每月的生物样本，并通过娱乐性鱼叉渔民的捕获量（n=135）进行补充。结果表明，康氏O.conwayi种群性别比向雄性倾斜（1M:0.6F），性别间的长度和年龄频率分布相似。康氏Oplegnathus conwayi是一个生长相对缓慢的物种，有记录的最大年龄为27岁。雄性和雌性的生长没有显著差异，总体种群生长曲线最好描述为L（t）=697.15（1–e–0.06（t–6.30））。在该物种中观察到的缓慢生长是易受过度开发影响的物种的特征，因此建议对未来的管理采取预防性方法。

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Age and Growth of the Cape Knifejaw Oplegnathus conwayi, an Endemic South African Teleost

The South African spearfishery targets a variety of data-deficient species, which are consequently poorly managed. This study aimed to describe the age and growth of one of these species, the Cape knifejaw, Oplegnathus conwayi, which is endemic to the southern and eastern coasts of South Africa. Monthly biological samples were collected through research spearfishing (n = 170) and augmented by recreational spearfishers' catches (n = 135). The results indicated that the O. conwayi population sex ratio was skewed towards males (1M:0.6F). The length- and age-frequency distributions were similar between sexes. Oplegnathus conwayi is a relatively slow-growing species, with a maximum-recorded age of 27 years. No significant differences were observed between male and female growth, with the overall population growth curve being best described as L(t) = 697.15(1 – e–0.06(t–6.30)). The slow growth observed in this species is characteristic of a species that is vulnerable to overexploitation, and accordingly a precautionary approach to future management is recommended.

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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.