Male-male Competition and Reproductive Success in Elephant Seals
نویسندگان
چکیده
منابع مشابه
Rival assessment among northern elephant seals: evidence of associative learning during male-male contests.
Specialized signals emitted by competing males often convey honest information about fighting ability. It is generally believed that receivers use these signals to directly assess their opponents. Here, we demonstrate an alternative communication strategy used by males in a breeding system where the costs of conflict are extreme. We evaluated the acoustic displays of breeding male northern elep...
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In capital breeders, individual differences in body size and condition can impact mating effort and success. In addition to the collateral advantages of large body size in competition, large nutrient reserves may offer advantages in endurance rivalry and enable the high rates of energy expenditure associated with mating success. We examined the impacts of body reserves and dominance rank on ene...
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Male seminal fluid proteins are known to affect female reproductive behavior and physiology by reducing mating receptivity and by increasing egg production rates. Such substances are also though to increase the competitive fertilization success of males, but the empirical foundation for this tenet is restricted. Here, we examined the effects of injections of size-fractioned protein extracts fro...
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Genetic selection for high yield in primary broiler breeder males may result in skeletal modifications that impede sperm transfer upon mating. In addition, fluctuating asymmetry (FA) in bilateral traits has been shown to reliably indicate male reproductive potential in some avian species. The goal of this study was to determine if physical variation due to genetic selection and FA could explain...
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Sri Suci Utami,a,b Benoı̂t Goossens,c Michael W. Bruford,c Jan R. de Ruiter,d and Jan A.R.A.M. van Hooffa aEthologie & Socio-ecologie, Universiteit Utrecht, PO Box 80086, 3508 TB Utrecht, The Netherlands, bFakultas Biologi, Universitas Nasional, Jl. Sawo manila, Jakarta 12510, Indonesia, cBiodiversity and Ecological Processes Group, School of Biosciences, Cardiff University, PO Box 915, Cathays ...
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ژورنال
عنوان ژورنال: American Zoologist
سال: 1974
ISSN: 0003-1569
DOI: 10.1093/icb/14.1.163