Summary
The Cory's Shearwaters (Calonectris diomedea) of Selvagem Grande (30°09′N, 15°52′W) mate randomly according to beak index, age, breeding experience and previous breeding success, and probably assortatively according to previous breeding frequency. Pairing always implying near neighbours, it is likely that lone birds do not search for a mate similar to themselves but take the first bird of opposite sex available within easy reach, which does not seem to penalize breeding as much as the search for an assorted mate could.
Zusammenfassung
Gelbschnabelsturmtaucher (Calonectris diomedea) auf Selvagem Grande (30°09′N, 15°52′W) verpaaren sich unabhängig von Schnabelindex, Alter, Bruterfahrung und vorherigem Bruterfolg, aber wahrscheinlich abhängig von der vorherigen Bruthäufigkeit. Die Paarbildung erfolgt immer mit dem nächsten Nachbarn, was wahrscheinlich macht, daß Einzelvögel nicht gezielt nach einem Partner suchen, sondern denjenigen nehmen, der in nächster Nähe gerade verfügbar ist. Dies scheint das Brutergebnis weniger zu beeinträchtigen als die Suche nach einem bestimmten Partner.
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Mougin, JL. Pairing in the Cory's Shearwater (Calonectris diomedea) of Selvagem Grande. J Ornithol 141, 319–326 (2000). https://doi.org/10.1007/BF02462241
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DOI: https://doi.org/10.1007/BF02462241