Effects of premigratory fasting on the potential for long distance dispersal of seeds by waterfool : an experiment with Marbled Teal

RESUME. — Effets du jeune premigratoire sur la potentialite des oiseaux d’eau a disseminer des graines a longue distance : une experience avec la Sarcelle marbree. — L’effet possible du jeune premigratoire sur la potentialite des oiseaux migrateurs a disseminer au loin des graines a ete teste en captivite sur neuf Sarcelles marbrees Marmaronetta angustirostris. En debut d’experience les oiseaux ont ete gaves avec un melange de graines de deux especes de Scirpus (dont une avec de grosses graines) et de marqueurs en plastique de deux tailles differentes (∅ 1,0 et 0,5 mm). Cinq individus ont ete prives de nourriture durant 8 heures (phase de jeune) puis prives a la fois d’eau et de nourriture durant 8 autres heures (phase de simulation de vol). Quatre individus de controle ont subi la phase de vol mais sans jeune prealable. Plus de 16 heures apres le gavage, un nombre significatif de graines et de marqueurs de petite taille fut recueilli dans les feces alors que les graines et les marqueurs de grande taille en etaient pratiquement absents. Quand la nourriture fut de nouveau mise a disposition apres la phase de simulation de vol, les oiseaux qui avaient ete auparavant soumis a une phase de jeune defequerent plus de graines de la petite espece et de petits marqueurs que les individus de controle. Ces resultats suggerent que le jeune premigratoire peut favoriser la dispersion a longue distance de graines par les oiseaux via la retention de propagules dans le tube digestif.

• Publication year

  2005

• Venue

  Revue de Ecologie-La Terre et la Vie

• Publication date

  Unknown publication date

• Fields of study

  Not labeled

• Identifiers
  DOI 10.3406/revec.2005.1273
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

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• No concepts are published for this paper.

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