Differences in foraging ecology align with genetically divergent ecotypes of a highly mobile marine top predator.
Tipo de material:
ArtículoIdioma: Inglés Tema(s): Clasificación CDD: - 599.7975 22
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Documento electrónico
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Corley Smith Library Colección PDF | Galápagos | 599.7975 JEG 2015 (Navegar estantería(Abre debajo)) | Disponible | 2021-2592 | |||||||||||||
Artículo
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Corley Smith Library Artículos | Galápagos | 599.7975 JEG (Navegar estantería(Abre debajo)) | Disponible | 2016-0053 |
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| 599.7975 GRI 1986 Attendance behavior of Galapagos sea lions. | 599.7975 IZU 2022 Regional divergence in the skull morphometry of adult male Galapagos sea lion / | 599.7975 JEG 2010 Field-based age estimation of juvenile Galapagos sea lions (Zalophus wollebaeki) using morphometric measurements. | 599.7975 JEG 2015 Differences in foraging ecology align with genetically divergent ecotypes of a highly mobile marine top predator. | 599.7975 KRA 2013 Mama’s boy: | 599.7975 MEI 2013 Site fidelity of male Galápagos sea lions: | 599.7975 MEI 2014 Being on time: |
Foraging differentiation within a species can contribute to restricted gene flow between ecologically different groups, promoting ecological speciation. Galapagos sea lions (Zalophus wollebaeki) show genetic and morphological divergence between the western and central archipelago, possibly as a result of an ecologically mediated contrast in the marine habitat. We use global positioning system (GPS) data, time-depth recordings (TDR), stable isotope and scat data to compare foraging habitat characteristics, diving behaviour and diet composition of Galapagos sea lions from a western and a central colony. We consider both juvenile and adult life stages to assess the potential role of ontogenetic shifts that can be crucial in shaping foraging behaviour and habitat choice for life. We found differences in foraging habitat use, foraging style and diet composition that aligned with genetic differentiation. These differences were consistent between juvenile and adult sea lions from the same colony, overriding age-specific behavioural differences. Our study contributes to an understanding of the complex interaction of ecological condition, plastic behavioural response and genetic make-up of interconnected populations.
English
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