Effects of captive-breeding conditions on metabolic and performance traits in an endangered,endemic cyprinidontiform fish  

作　　者：Guillem Masó Emili García-Berthou Roberto Merciai Dani Latorre Anna Vila-Gispert 

机构地区：[1]GRECO,Institute of Aquatic Ecology,University of Girona,Maria Aurèlia Capmany 69,17003 Girona,Catalonia,Spain [2]bFaculty of Sciences and Technology,University of Vic–Central University of Catalonia,Carrer de la Laura 13,08500 Vic,Catalonia,Spain

出　　处：《Current Zoology》2025年第1期14-24,共11页动物学报(英文版)

基　　金：supported by the supported by the Spanish Ministry of Science,Innovation and Universities(MCIN/AEI/10.13039/501100011033);the European Union(NextGenerationEU/PRTR)through projects CGL2016-80820-R,PID2019-103936GB-C21,TED2021-129889B-I00,and RED2022-134338-T.

摘　　要：Captive breeding and stocking are commonly employed strategies for enhancing fisheries and conserving endangered fish species.However,hatchery-raised fish often exhibit reduced performance in the wild,displaying alterations in physiological,morphological,and behavioral traits.We tested for differences in swimming capacity and metabolic traits between wild and hatchery-reared individuals of the Spanish toothcarp(Aphanius iberus)from 2 different populations.Furthermore,we experimentally tested if these changes translated into fitness differences after their stocking into the wild.There were significant differences in swimming capacity and metabolic traits between wild and hatchery-reared individuals and also between the 2 populations.Captive-bred individuals displayed consistently lower metabolic rates than wild individuals from the same population(30-76% lower).Critical swimming speed rather differed between the 2 populations.Sex-specific differences were observed in maximum and standard metabolic rates,with wild individuals and females generally exhibiting higher values but with some exceptions.During a 3-month experiment,survival rates did not significantly differ between wild and captive-bred fish.Captive-bred individuals started smaller but exhibited rapid growth during the experiment.Initially,larger captive-bred fish had lower body conditions than their wild counterparts,but these differences progressively diminished.In summary,captive-bred individuals of this fish species showed lower metabolic rates,although the differences with wild individuals slightly depended on sex and size.

关 键 词：fish stocking hatchery-reared fish metabolic traits protected fish species REINTRODUCTION swimming capacity 

分 类 号：Q95[生物学—动物学]