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Experimentelle Untersuchungen zur Bedeutung der Rachenzeichnung junger Zebrafinken
Author(s) -
Immelmann Klaus,
Piltz Achim,
Sossinka Roland
Publication year - 1977
Publication title -
zeitschrift für tierpsychologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.739
H-Index - 74
eISSN - 1439-0310
pISSN - 0044-3573
DOI - 10.1111/j.1439-0310.1977.tb02118.x
Subject(s) - biology , zoology , white (mutation) , genetics , gene
Wild‐coloured Zebra Finch nestlings with fully developed mouth markings were compared with white mutants, which lack the markings, with respect to the ability of these markings to release the feeding response of both wild‐coloured and white parents. In more than 80 nestlings, the wild‐coloured ones proved to have a higher survival rate, to grow faster, to be given more food, and to have priority to the first feedings in the day. Within the colour groups greater relative age was as advantageous as mouth markings were between groups.