Molecular Analysis of the Accuracy of Phenotypic Sex Assessment by Anglers in Norwegian Atlantic Salmon Fisheries

IF 2 3区农林科学 Q2 FISHERIES

Fisheries Management and Ecology Pub Date : 2025-02-14 DOI:10.1111/fme.12801

Grethe Robertsen, Tim Burton, Ola Ugedal, Eva M. Ulvan, Ola H. Diserud, Øyvind Solem, Merethe Hagen Spets, Sten Karlsson, Peder Fiske

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Abstract

A management regulation applied in some recreational Atlantic salmon (Salmo salar) fisheries is a moratorium on harvest of female fish, which can only be effective if recreational anglers can consistently discriminate females from males. We used molecular methods to compare angler-reported sexes of salmon captured in Norwegian populations with the true sexes of the same individuals. We made this comparison (i) among rivers that were subject to female no-take policies or not within the same year; and (ii) within rivers before and after a female no-take regulation was instituted. Sex was misclassified for ca. 25% of salmon that were true females, especially those that were large or captured early in the season. Furthermore, true females were misclassified more often when a female no-take regulation was in effect. We conclude that a management regulation aimed at protecting female salmon in recreational fisheries may be less effective than expected.

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挪威大西洋鲑鱼渔业中垂钓者表型性别评估准确性的分子分析

在一些休闲大西洋鲑鱼（Salmo salar）渔业中适用的一项管理条例是暂停捕捞雌鱼，只有在休闲垂钓者能够始终区别对待雌鱼和雄鱼的情况下，这一规定才能有效。我们使用分子方法来比较垂钓者报告的挪威种群捕获的鲑鱼的性别与同一个体的真实性别。我们做了如下比较：(1)在同一年内实施和未实施女性禁捕政策的河流；以及（ii）在女性禁捕条例制定前后的河流内。大约25%的雌性鲑鱼被错误地分类，尤其是那些体型较大或在捕捞季节早期捕获的鲑鱼。此外，当女性禁捕规定生效时，真正的女性更容易被错误分类。我们的结论是，旨在保护休闲渔业中雌性鲑鱼的管理法规可能不如预期的有效。

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来源期刊

Fisheries Management and Ecology 农林科学-渔业

CiteScore

3.80

自引率

5.00%

发文量

审稿时长

12-24 weeks

期刊介绍： Fisheries Management and Ecology is a journal with an international perspective. It presents papers that cover all aspects of the management, ecology and conservation of inland, estuarine and coastal fisheries. The Journal aims to: foster an understanding of the maintenance, development and management of the conditions under which fish populations and communities thrive, and how they and their habitat can be conserved and enhanced; promote a thorough understanding of the dual nature of fisheries as valuable resources exploited for food, recreational and commercial purposes and as pivotal indicators of aquatic habitat quality and conservation status; help fisheries managers focus upon policy, management, operational, conservation and ecological issues; assist fisheries ecologists become more aware of the needs of managers for information, techniques, tools and concepts; integrate ecological studies with all aspects of management; ensure that the conservation of fisheries and their environments is a recurring theme in fisheries and aquatic management.