首页|Lower marine productivity increases agonistic interactions between sea lions and fur seals in Northern Pacific Patagonia

Lower marine productivity increases agonistic interactions between sea lions and fur seals in Northern Pacific Patagonia

扫码查看
原文链接
  • 万方数据
  • 维普
Interspecific interactions are key drivers of individual and population-level fitness in a wide range of animals.However,in marine ecosystems,it is relatively unknown which biotic and abiotic fac-tors impact behavioral interactions between competing species.We assessed the impact of wea-ther,marine productivity,and population structure on the behavioral agonistic interactions be-tween South American fur seals(SAFSs),Arctocephalus australis,and South American sea lions(SASLs),Otaria byronia,in a breeding colony of SAFS.We hypothesized that agonistic interactions between SAFSs and SASLs respond to biotic and abiotic factors such as SAFS population struc-ture,marine productivity,and weather.We found that SASL and SAFS interactions almost always resulted in negative impacts on the social structure or reproductive success of the SAFS colony.SASL adult males initiated stampedes of SAFS and/or abducted and predated SAFS pups.Adult SAFS males abundance and severe weather events were negatively correlated with agonistic inter-actions between species.However,proxies for lower marine productivity such as higher sea sur-face temperature and lower catches of demerso-pelagic fish were the most important predictors of more frequent agonistic interactions between SAFS and SASL.Under the current scenario of de-cline in marine biomass due to global climate change and overfishing,agonistic interactions be-tween competing marine predators could increase and exacerbate the negative impacts of environ-mental change in these species.

interspecific interactionsclimate changeGuafo Islandsea surface temperatureSouth American fur sealSouth American sea lion

Felipe MONTALVA、Hector PAVéS、Diego PéREZ-VENEGAS、Karin G BARRIENTOS E、Carola VALENCIA、Diego MIRANDA-URBINA、Mauricio SEGUEL

展开 >

Facultad de Ciencias Biologicas,Pontificia Universidad Catolica de Chile,Santiago,Chile

Departamento de Ciencias Básicas,Facultad de Ciencias,Universidad Santo Tomás,Osorno,Chile

Centro de Investigación y Gestión de Recursos Naturales(CIGREN),Instituto de Biología,Facultad de Ciencias,Universidad de Valparaíso,Valparaíso,Chile

Programa de Doctorado en Ciencias Agrarias,Escuela de Graduados de la,Facultad de Ciencias Agrarias y Alimentarias,Universidad Austral de Chile,Valdivia,Chile

Facultad de Medicina Veterinaria,Sede Patagonia,Universidad San Sebastian,Puerto Montt,Chile

Instituto de Ciencias Biológicas,Universidad de Talca,Talca,Chile

Department of Pathobiology,Ontario Veterinary College,University of Guelph,Guelph,Canada

展开 >

Rufford Small Grants FoundationMorris Animal Foundation

18815-1D16ZO-413

2022

动物学报(英文版)
中国科学院动物研究所,中国动物学会

动物学报(英文版)

CSCDSCI
影响因子：0.198
ISSN：1674-5507
年,卷(期)：2022.68(6)
  • 90