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Provedor de dados:  Neotropical Ichthyology
País:  Brazil
Título:  Behavior of prey links midwater and demersal piscivorous reef fishes
Autores:  Auster,Peter J.
Data:  2009-03-01
Ano:  2009
Palavras-chave:  Habitat
Live bottom
Prey density
Resumo:  Pelagic and demersal guilds of piscivorous fishes are linked by a variety of biological and physical processes that mediate interactions with common prey species. Understanding the behaviors of predators and prey can provide insight into the conditions that make such linkages possible. Here we report on the behaviors of mid-water piscivorous fishes and the responses of prey that produce feeding opportunities for demersal piscivorous fishes associated with "live bottom" ledge habitats off the coast of Georgia (northwest Atlantic Ocean). Prey taxa reduced nearest neighbor distances and retreated towards the seafloor during predatory attacks by mid-water fishes. Demersal fishes subsequently attacked and consumed prey in these ephemeral high density patches. No predation by demersal fishes was observed when prey species were at background densities. If the predator-prey interactions of demersal piscivorous fishes are commonly mediated by the predatory behavior of midwater piscivorous fishes and their prey, such indirect facilitative behaviors may be important in terms of the population processes (e.g., prey consumption and growth rates) of these demersal fishes.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Ictiologia
Relação:  10.1590/S1679-62252009000100014
Formato:  text/html
Fonte:  Neotropical Ichthyology v.7 n.1 2009
Direitos:  info:eu-repo/semantics/openAccess

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