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Deceptive nest defence in ground-nesting birds and the risk of intermediate strategies

Smith, Paul A ; Edwards, Darryl B Lebarbenchon, Camille

PloS one, 2018-10, Vol.13 (10), p.e0205236-e0205236 [Periódico revisado por pares]

United States: Public Library of Science

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  • Título:
    Deceptive nest defence in ground-nesting birds and the risk of intermediate strategies
  • Autor: Smith, Paul A ; Edwards, Darryl B
  • Lebarbenchon, Camille
  • Assuntos: Adults ; Analysis ; Animal behavior ; Aquatic birds ; Behavior ; Biology and Life Sciences ; Birds ; Breeding success ; Calidris fuscicollis ; Deception ; Defensive behavior ; Ecology and Environmental Sciences ; Flushing ; Habitats ; Heritability ; Injury prevention ; Medicine and Health Sciences ; Model testing ; Nest building ; Nesting ; Nests ; Phalaropes ; Phalaropus fulicarius ; Predation ; Predation (Biology) ; Reproduction ; Risk ; Shore birds ; Shorebirds ; Social Sciences
  • É parte de: PloS one, 2018-10, Vol.13 (10), p.e0205236-e0205236
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Competing Interests: The authors have declared that no competing interests exist.
  • Descrição: Nest predation is an important determinant of reproductive success and ground-nesting birds exhibit a variety of nest defence strategies to mitigate the risk. Many small-bodied, ground nesting birds rely on deceptive behaviours such as injury-feigning to reduce nest predation: we call this behaviour active deception. However, active deception may entail risks to adults, and passive deceptive behaviour, where individuals effectively sneak away from the nest by flushing at long distances, may be an alternative means of avoiding nest predation. We provide a simple model to demonstrate that these tails of the flush distance distribution could minimize predation risk; an intermediate strategy of moderate flush distances means that birds flush more often than with short-distance flushes, and once flushed, the nest is more easily located than for long-distance flushes. We tested this model using two species of ground nesting shorebirds, the White-rumped Sandpiper (Calidris fuscicollis) and the Red Phalarope (Phalaropus fulicarius). We demonstrate that short-distance flushes are associated with active deception and intermediate-distance flushes are associated with an increased risk of nest predation. However, we found no evidence that this potential selective pressure against intermediate strategies has produced a bimodal distribution of nest defence traits. The heritability of defence behaviours, or the ability of individuals to learn, is unknown and other factors such as energetic constraints or risks to adults might also influence flush distances and defence behaviours.
  • Editor: United States: Public Library of Science
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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