Nom du corpus

Corpus Systématique Animale

Titre du document

The American Avocet ( Recurvirostra americana ) as a paradigm for adult automimicry

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Adult automimicry
  • automimicry
  • mimicry
  • life-history strategies
  • antipredator adaptations
  • American Avocet
  • Recurvirostra americana
Nom du fichier dans la ressource
Oiseaux_v2b_01439
Auteur(s)
  • Tex A. Sordahl
Affiliation(s)
  • Department of Biology, Luther College, 52101, Decorah, Iowa, USA
Résumé

The body of theory concerning life-history strategies predicts that the duration of high-mortality stages should be minimized by natural selection. This is especially applicable to the avian pre-flight stage, during which growth rates typically are rapid. Using the American Avocet (Recurvirostra americana) as a paradigm, I propose a developmental strategy by which young animals can lower their mortality rates by an accelerated (and deceptive) acquisition of adult or adult-like characters. The benefit accrues when predators misidentify the vulnerable young as adults and fail to attack them because adults are much less vulnerable. This strategy, termed adult automimicry, is most likely to occur in precocial species living in open habitats. American Avocets are large, precocial, open-country shorebirds that first fly when about 4–5 weeks old. They develop a juvenal, plumage in their third week that resembles adult breeding plumage in pattern and color, even though plumage details are different. At this time chicks begin using adult foraging techniques and tend to move away rather than hide from potential predators. A few weeks later they acquire a first winter plumage that resembles adult winter plumage. Thus, avocet chicks appear unusually adult-like after their second week. This should make it difficult for distant predators to distinguish flightless chicks from volant adults.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - evolutionary biology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - genetics & heredity
  • 1 - science ; 2 - evolutionary biology
  • 1 - science ; 2 - ecology
Identifiant ISTEX
76FE2197FD5F1EB821AE82BEC90716A4945B3F38
Revue

Evolutionary Ecology

Année de publication
1988
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.379
Sous-corpus
  • Oiseaux
Type de publication
Journal
ark:/67375/1BB-4NVJT4MF-V
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