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Individual willingness to leave a safe refuge and the trade-off between food and safety: a test with social fish.
Balaban-Feld, Jesse; Mitchell, William A; Kotler, Burt P; Vijayan, Sundararaj; Tov Elem, Lotan T; Rosenzweig, Michael L; Abramsky, Zvika.
Afiliación
  • Balaban-Feld J; Department of Life Sciences, Ben-Gurion University, Beer Sheva 8410501, Israel.
  • Mitchell WA; Department of Biology, Indiana State University, Terre Haute, IN 47809, USA.
  • Kotler BP; The Jacob Blaustein Institute for Desert Research, Mitrani Department of Desert Ecology, Ben-Gurion University, Sde Boker 84990, Israel.
  • Vijayan S; Department of Life Sciences, Ben-Gurion University, Beer Sheva 8410501, Israel.
  • Tov Elem LT; Department of Life Sciences, Ben-Gurion University, Beer Sheva 8410501, Israel.
  • Rosenzweig ML; Department of Ecology and Evolutionary Biology, The University of Arizona, Tucson, AZ 85721, USA.
  • Abramsky Z; Department of Life Sciences, Ben-Gurion University, Beer Sheva 8410501, Israel.
Proc Biol Sci ; 286(1907): 20190826, 2019 07 24.
Article en En | MEDLINE | ID: mdl-31311474
Refuges offer prey animals protection from predation, but increased time spent hiding can reduce foraging opportunities. Within social groups, individuals vary in their refuge use and willingness to forage in the presence of a predator. Here, we examine the relative foraging benefits and mortality costs associated with individual refuge use and foraging behaviour within groups of goldfish (Carassius auratus) under predation risk from an avian predator (little egret-Egretta garzetta). We assessed individual order of emergence from the refuge and participation over 15 group foraging outings, and assigned each fish a daily outing index score. The individual fish that emerged from the refuge earlier than the other group members and that participated in more outings received high outing index scores and consumed more food compared with fish that tended to emerge in posterior positions and participate in fewer outings. However, individual fish that attained high outing index scores suffered a higher risk of predation. Furthermore, the amount of time the egret spent at the pool affected group foraging behaviour: as predation risk increased, groups of fish consumed significantly less food. Our results exemplify the trade-off between foraging success and safety from predation that prey species regularly experience.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Conducta Predatoria / Aves / Carpa Dorada / Cadena Alimentaria / Conducta Alimentaria Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: Israel Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Conducta Predatoria / Aves / Carpa Dorada / Cadena Alimentaria / Conducta Alimentaria Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: Israel Pais de publicación: Reino Unido