Linked Life Data

17944114

Source:http://linkedlifedata.com/resource/pubmed/id/17944114

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2007-10-19
pubmed:abstractText
Early sibling aggression is a widespread phenomenon in birds. Ornithologists distinguish species with "obligate" and "facultative" siblicide. Sibling aggression was described in some mammal species: the domestic pig (Sus scrofa), the spotted hyena (Crocuta crocuta), the Eurasian lynx (Lynx lynx), and the Iberian lynx (L. par-dinus). In all of them, sibling aggression corresponds well with the "facultative" siblicide model in birds. Sibling aggression was observed at the age of 36-64 days in both lynx species. It is usually restricted to a single fight and can change the hierarchical structure and growth rate of the kittens. In the spotted hyena and the domestic pig, the frequency and intensity of aggressive interactions between siblings are strongest during the first days of postnatal ontogeny and then decrease gradually. The newborns of these species are much developed than newborn lynx kittens. Usually adult lynx females, in contrast to hyenas and pigs, try to stop sibling fights. This is probably related to the larger parental investment at the time of the fight in lynxes (a kitten's body weight is about 10% of the mother's) than in pigs (0.5%) and hyenas (1.9%). Sibling aggression in spotted hyenas could be related to the high level of androstenedione and is not related to testosterone concentration. In the Eurasian lynx, female sibs attack their littermates slightly more often than male sibs do, and sibling aggression is not testosterone-dependent. Hormones secreted by the adrenal glands may play an important role in this phenomenon. The data available so far, however, do not positively confirm the presence of hormonal trigger effects in mammal sibling aggression.
pubmed:language
rus
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0044-4596
pubmed:author
pubmed:issnType
Print
pubmed:volume
68
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
307-17
pubmed:meshHeading
pubmed:articleTitle
[Early sibling aggression in mammals and its hormonal correlates].
pubmed:publicationType
Journal Article, English Abstract, Review, Research Support, Non-U.S. Gov't