期刊
ECOLOGY AND EVOLUTION
卷 11, 期 16, 页码 11477-11490出版社
WILEY
DOI: 10.1002/ece3.7939
关键词
Atlantic cod; behavior; ecotypes; stable isotopes; telemetry; trophic ecology
资金
- European Regional Development Fund (Interreg IVa MarGen project) [20200411]
- Danish rod and net fish license funds
- Marine Science Program within the Research Council of Norway [294926]
- RFF Oslofjordfondet grant [272090]
- Ministry of Trade, Industry, and Fisheries, Norway
The coexistence of different ecotypes of Atlantic cod may exhibit innate differences in feeding and movement ecologies, potentially filling different functional roles in marine ecosystems.
Coexistence of ecotypes, genetically divergent population units, is a widespread phenomenon, potentially affecting ecosystem functioning and local food web stability. In coastal Skagerrak, Atlantic cod (Gadus morhua) occur as two such coexisting ecotypes. We applied a combination of acoustic telemetry, genotyping, and stable isotope analysis to 72 individuals to investigate movement ecology and food niche of putative local Fjord and putative oceanic North Sea ecotypes-thus named based on previous molecular studies. Genotyping and individual origin assignment suggested 41 individuals were Fjord and 31 were North Sea ecotypes. Both ecotypes were found throughout the fjord. Seven percent of Fjord ecotype individuals left the study system during the study while 42% of North Sea individuals left, potentially homing to natal spawning grounds. Home range sizes were similar for the two ecotypes but highly variable among individuals. Fjord ecotype cod had significantly higher delta C-13 and delta N-15 stable isotope values than North Sea ecotype cod, suggesting they exploited different food niches. The results suggest coexisting ecotypes may possess innate differences in feeding and movement ecologies and may thus fill different functional roles in marine ecosystems. This highlights the importance of conserving interconnected populations to ensure stable ecosystem functioning and food web structures.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据