DRD4 gene polymorphism in great tits: gender-specific association with behavioural variation in the wild

被引：0
作者：
Killu Timm
Vallo Tilgar
Pauli Saag
机构：
[1] University of Tartu,Department of Zoology, Institute of Ecology and Earth Sciences
来源：
Behavioral Ecology and Sociobiology | 2015年 / 69卷
关键词：
Great tit; Personality variation; DRD4 gene; Gender-specific association;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Recent studies indicate that polymorphisms of the DRD4 gene may be related to behavioural variation in mammals and birds. The purpose of this study was to ascertain a connection between DRD4 genotypes and behavioural patterns in a wild passerine bird during breeding time. We evaluated changes in birds’ parental provisioning behaviour in the presence of a novel object. As a behavioural trait, we measured the duration of feeding interruption from the first time that each bird noticed the novel object until they entered the nest box. We found a gender-specific association between DRD4 gene polymorphism and parental behaviour. Males with a CC genotype delayed feeding for a longer period than those with CT and TT genotypes. No significant effect of genotype on provisioning behaviour was observed among females. We conclude that (i) DRD4 gene polymorphism in wild birds can be associated with behaviour related to fearfulness, and (ii) this effect is supposedly gender-specific during the breeding time, potentially explained by sex differences in parental care or hormonal levels.
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页码：729 / 735
页数：6
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