Stealing milk by young and reciprocal mothers: high incidence of allonursing in giraffes, Giraffa camelopardalis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F16%3AN0000045" target="_blank" >RIV/00027014:_____/16:N0000045 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41340/16:73123

Výsledek na webu

<a href="http://www.vuzv.cz/sites/File/_privat/16043.pdf" target="_blank" >http://www.vuzv.cz/sites/File/_privat/16043.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.anbehav.2015.11.026" target="_blank" >10.1016/j.anbehav.2015.11.026</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stealing milk by young and reciprocal mothers: high incidence of allonursing in giraffes, Giraffa camelopardalis

Popis výsledku v původním jazyce

Allonursing, the nursing of nonfilial offspring, has been reported in a number of mammalian species, however, very few studies have investigated more than three hypotheses. The aim of our study was to investigate seven hypotheses explaining allonursing in captive giraffes. During 2007-2011, we observed 24 females and 37 calves in four zoological gardens in the Czech Republic, recording 2514 suckling events. We found that 83% of the females allonursed a nonfilial calf and 86.5% of calves allosuckled from a nonmaternal female, thus giraffes represent one of the highest occurrences of allonursing among nondomesticated mammals. The nonfilial calves more often allosuckled together with the filial ones than alone and tried to adopt positions where they may be harder to recognize, providing evidence for the milk theft hypothesis. In addition, the probability that a calf successfully allosuckled at least once from any female was higher when its mother allonursed successfully at least once than when she rejected calves. However, we found no evidence for the same rate of allonursing between reciprocal dyads of females and calves. Thus, we suggest that allonursing in giraffes is caused by offspring trying to steal milk and that females may tolerate this behaviour if reciprocal, in line with recent findings about giraffe sociality.

Název v anglickém jazyce

Stealing milk by young and reciprocal mothers: high incidence of allonursing in giraffes, Giraffa camelopardalis

Popis výsledku anglicky

Allonursing, the nursing of nonfilial offspring, has been reported in a number of mammalian species, however, very few studies have investigated more than three hypotheses. The aim of our study was to investigate seven hypotheses explaining allonursing in captive giraffes. During 2007-2011, we observed 24 females and 37 calves in four zoological gardens in the Czech Republic, recording 2514 suckling events. We found that 83% of the females allonursed a nonfilial calf and 86.5% of calves allosuckled from a nonmaternal female, thus giraffes represent one of the highest occurrences of allonursing among nondomesticated mammals. The nonfilial calves more often allosuckled together with the filial ones than alone and tried to adopt positions where they may be harder to recognize, providing evidence for the milk theft hypothesis. In addition, the probability that a calf successfully allosuckled at least once from any female was higher when its mother allonursed successfully at least once than when she rejected calves. However, we found no evidence for the same rate of allonursing between reciprocal dyads of females and calves. Thus, we suggest that allonursing in giraffes is caused by offspring trying to steal milk and that females may tolerate this behaviour if reciprocal, in line with recent findings about giraffe sociality.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Animal Behaviour

ISSN

0003-3472

e-ISSN

—

Svazek periodika

113

Číslo periodika v rámci svazku

není

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

113-123

Kód UT WoS článku

000371257300016

EID výsledku v databázi Scopus

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