Randler, Christoph ; Polska Akademia Nauk. Muzeum i Instytut Zoologii
Acta Ornithologica, vol. 39, no. 2 ; Zachowanie agresywne gęsi grubonosych oraz ich mieszańców ; Interactions in swan geese and hybrids
Museum and Institute of Zoology, Polish Academy of Sciences
Bibliogr. p. 152-153 ; P. [147]-153 ; 27 cm ; Abstract. pol.
Evidence for direct interspecific competition in wildfowl and between hybrids and their parent speciesis scarce. This study examined threat displays and agonistic encounters (n = 324) in a goose flock of 140 SwanGeese and 13 hybrids with Greylag Goose living in Heidelberg, SW Germany. In general, agonistic behaviourmade up less than 1% of the time budget throughout the year as measured by focal animal sampling. Mostencounters (84%) were won by the initiator, both in Swan Geese and in hybrids. No difference was found betweenSwan Geese and hybrids in the outcome of an encounter, suggesting equal competitive quality. There were differenceswith respect to threat postures with hybrids performing diagonal neck threats more often and intentionalmovements less often. This seems to be related to their hybrid origin, since Greylag Geese most often showdiagonal neck and forward threat displays. There was no direct evidence for hybrid superiority or inferiority
MiIZ PAN, call no. patrz sygn. czas. P.257-39-2 ; MiIZ PAN, call no. patrz sygn. czas. P.4568-39-2 ; click here to follow the link
Copyright-protected material. May be used within the limits of statutory user freedoms
Museum and Institute of Zoology of the Polish Academy of Sciences
Library of the Museum and Institute of Zoology of the Polish Academy of Sciences
Oct 2, 2020
Jul 28, 2015
59
https://rcin.org.pl./publication/49786
Edition name | Date |
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Aggressive interactions in swan geese Anser cygnoides and their hybrids / Randler Ch. | Oct 2, 2020 |
Randler, Christoph
Randler, Christoph
Iwan, Dariusz Polska Akademia Nauk. Muzeum i Instytut Zoologii
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