不列颠哥伦比亚省乔治亚海峡港海豹（Phoca vitulina）捕食库荷鲑幼鱼的量化影响

IF 1.8 3区农林科学 Q2 FISHERIES

Marine and Coastal Fisheries Pub Date : 2024-02-14 DOI:10.1002/mcf2.10271

Benjamin W. Nelson, Murdoch K. McAllister, Andrew W. Trites, Austen C. Thomas, Carl J. Walters

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引用次数: 0

摘要

目标梭罗鲑（Coho Salmon Oncorhynchus kisutch）是西北太平洋地区休闲、商业和土著渔业的重要资源。本研究的目的是加深我们对海洋哺乳动物捕食如何影响不列颠哥伦比亚省佐治亚海峡鲑鱼存活率和生产力的了解。具体来说，我们量化了港海豹（Phoca vitulina）在幼年鲑鱼出海的头几个月捕食鲑鱼的影响。早期的海洋生存被认为是该地区科霍鲑种群恢复的限制因素。方法为了估算港海豹吃掉的幼年鲑鱼数量，我们建立了一个数学模型，该模型综合了捕食者的饮食数据和鲑鱼数量及死亡率动态。结果我们的分析估计，2004-2016 年间，港海豹每年平均捕食 46%-59% 的幼年科霍鲑，首次对乔治亚海峡的海豹捕食量进行了定量估计。结论海洋哺乳动物捕食幼年科霍鲑可能是限制乔治亚海峡科霍鲑生存和恢复的一个非常重要的因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Quantifying impacts of harbor seal Phoca vitulina predation on juvenile Coho Salmon in the Strait of Georgia, British Columbia

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Quantifying impacts of harbor seal Phoca vitulina predation on juvenile Coho Salmon in the Strait of Georgia, British Columbia

Objective

Coho Salmon Oncorhynchus kisutch provide an important resource for recreational, commercial, and Indigenous fisheries in the Pacific Northwest. The goal of this study was to improve our understanding of how marine mammal predation may be impacting the survival and productivity of Coho Salmon in the Strait of Georgia, British Columbia. Specifically, we quantified the impact of harbor seal Phoca vitulina predation on juvenile Coho Salmon during their first several months at sea. Early marine survival is believed to be the limiting factor for the recovery of Coho Salmon populations in this region.

Methods

To estimate the number of juvenile Coho Salmon consumed by harbor seals, we developed a mathematical model that integrates predator diet data and salmon population and mortality dynamics.

Result

Our analysis estimated that harbor seals consumed an annual average of 46−59% of juvenile Coho Salmon between 2004–2016, providing the first quantitative estimate of seal predation in the Strait of Georgia.

Conclusion

Marine mammal predation on juvenile Coho Salmon is potentially a very important factor limiting survival and recovery of Coho Salmon in the Strait of Georgia.

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来源期刊

Marine and Coastal Fisheries FISHERIES-MARINE & FRESHWATER BIOLOGY

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

>12 weeks

期刊介绍： Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science publishes original and innovative research that synthesizes information on biological organization across spatial and temporal scales to promote ecologically sound fisheries science and management. This open-access, online journal published by the American Fisheries Society provides an international venue for studies of marine, coastal, and estuarine fisheries, with emphasis on species'' performance and responses to perturbations in their environment, and promotes the development of ecosystem-based fisheries science and management.