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研究揭示捕捞对鲑鱼生活史演变的影响
作者:小柯机器人 发布时间:2022/2/27 14:28:42

由捕捞直接和间接影响的鲑鱼生活史快速演变,这一成果由芬兰赫尔辛基大学C.R. Primmer课题组经过不懈努力而取得。2022年2月24日出版的《科学》发表了这项成果。

在本研究中,研究人员通过两种相反的由渔业诱导的进化确定了大西洋鲑鱼在成熟早期进化的驱动因素:与捕食鲑鱼猎物(毛鳞鱼)相关的间接影响(导致早熟 ),以及与人类捕鱼相关的直接影响(导致晚熟)。由于毛鳞鱼是水产养殖饲料蛋白质的来源,研究人员推测鲑鱼水产养殖可能间接影响了野生鲑鱼种群。

据介绍,了解进化的驱动因素是生物学的基本目标。然而,由于缺乏时间数据和对大多数性状的遗传基础知识,研究人类活动对进化的影响具有一定挑战性。

附:英文原文

Title: Rapid evolution in salmon life history induced by direct and indirect effects of fishing

Author: Y. Czorlich, T. Aykanat, J. Erkinaro, P. Orell, C.R. Primmer

Issue&Volume: 2022-02-24

Abstract: Understanding the drivers of evolution is a fundamental aim in biology. However, identifying the evolutionary impacts of human activities is challenging because of lack of temporal data and limited knowledge of the genetic basis of most traits. Here, we identify the drivers of evolution toward earlier age at maturity in Atlantic salmon via two types of fisheries-induced evolution acting in opposing directions: an indirect effect linked with harvest of a salmon prey species (capelin) at sea (selection against late maturation), and a direct effect due to net fishing in the river (selection against early maturation). As capelin are harvested as an aquaculture feed protein source, we hereby determine an indirect path by which salmon aquaculture may influence wild salmon populations.

DOI: abg5980

Source: https://www.science.org/doi/10.1126/science.abg5980

 

期刊信息
Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.037