期刊
JOURNAL OF ETHOLOGY
卷 28, 期 2, 页码 239-244出版社
SPRINGER JAPAN KK
DOI: 10.1007/s10164-009-0175-7
关键词
Aggression; Resource defence; Dominance; Home range; Male size
资金
- Rhodes University
Competition for mating opportunities may involve exclusion of intrasexual competitors (direct) or defending resources necessary to attract mates (indirect). Male swordtails (Xiphophorus helleri) engage in direct competition. Moreover in natural populations they defend a home range. This study aimed to test whether this home range defence is a form of food resource defence, which may therefore have a female attraction function. Male swordtails did defend a food resource and showed increased aggression in the presence of both food and females. However, food resource defence decreased when females were present, suggesting that both food and females are treated as defendable resources.
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