MALE-MALE PAIRS IN GREYLAG GEESE (ANSER-ANSER)

Authors
Citation
R. Huber et M. Martys, MALE-MALE PAIRS IN GREYLAG GEESE (ANSER-ANSER), Journal fur Ornithologie, 134(2), 1993, pp. 155-164
Citations number
38
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Ornithology
Journal title
ISSN journal
0021-8375
Volume
134
Issue
2
Year of publication
1993
Pages
155 - 164
Database
ISI
SICI code
0021-8375(1993)134:2<155:MPIGG(>2.0.ZU;2-P
Abstract
For almost two decades a flock of 130 free-flying Greylag Geese (Anser anser) has been the focus of detailed ethological investigations at t he Konrad Lorenz Institut in Grunau im Almtal, Austria. Gander pairs, i. e. male-male pairs, represent a prominent social unit in this flock and were the subject of a detailed behavioral investigation. Analysis of the composition and dynamics of the flock over a 15 year period in dicated that the incidence of homosexual pairings closely paralleled t he male bias of the sex ratio. The behavior of ganders in gander pairs was investigated and compared to that of gander and goose in heterose xual pairs. The behavior of the two males in a gander pair (1) was com parable in most aspects, (2) was similar to the behavior of the gander in heterosexual pairs, and (3) differed greatly from that of the hete rosexually paired goose- Therefore, pseudo-female behavior in one part ner cannot account for the formation of a pairbond between two males. As a unit, gander pairs were characterized by a higher frequency of of fensive agonistic behavior compared to heterosexual pairs and spent si gnificantly more time peripheral to, and away from the flock than did heterosexual pairs.