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Habitatsimplificationaffectsnuclear-followerforaging associationamong stream fishes Fabrício Barreto TeresaRenato de Mei RomeroLílian Casatti2011 год

Habitat simplification affects nuclear-follower foraging association among stream fishes
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Аннотация: Nuclear-follower interaction is a particular kind of interspecific foraging association that includes a nuclear species, which dig in or inspect the bottom, and follower species, which access the food items made available by the nuclear. In this study we examined the effect of habitat structure on nuclear-follower relationship in a stream of Bodoquena Plateau, Central-West Brazil. Foraging associations were registered while snorkeling in 24 observation sessions, totaling six hours in unaltered and altered sites. Overall, 272 nuclear-follower associations were registered, having four species acting as nuclear and seven as followers. The dominant nuclear species were different in each site. Prochilodus lineatus was the main nuclear species in the altered site and Leporinus macrocephalus in the unaltered site. The richness of follower species was similar between sites, however, follower species abundance per interaction were significantly higher in the unaltered site than in the altered site. These differences seem to be a consequence of the alterations in assemblage composition and feeding behavior of the nuclear species that presumably are affected by different substrate composition and food availability between the structurally distinct areas.
Год издания: 2011
Авторы: Fabrício Barreto Teresa, Renato de Mei Romero, Lílian Casatti, José Sabino
Издательство: Sociedade Brasileira de Ictiologia
Источник: Neotropical Ichthyology
Ключевые слова: Fish biology, ecology, and behavior, Fish Ecology and Management Studies, Fish Biology and Ecology Studies
Другие ссылки: Neotropical Ichthyology (PDF)
Neotropical Ichthyology (HTML)
Zenodo (CERN European Organization for Nuclear Research) (PDF)
Zenodo (CERN European Organization for Nuclear Research) (HTML)
DOAJ (DOAJ: Directory of Open Access Journals) (HTML)
Acervo Digital da Universidade Estadual Paulista (Universidade Estadual Paulista) (PDF)
Acervo Digital da Universidade Estadual Paulista (Universidade Estadual Paulista) (HTML)