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The evolution of song in female birds in Europe
Garamszegi, László Zsolt; Pavlova, Denitza Zaprianova; … - In: Behavioral Ecology 18 (2007) 1, pp. 86-96
Bird song is usually regarded as an attribute of males. However, in some species, females may also produce songs even with comparable complexity to that of males. It has been suggested that female song may evolve due to similar selection pressures acting on males, but no study has yet...
Persistent link: https://www.econbiz.de/10008581350
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Grooming and agonistic support: a meta-analysis of primate reciprocal altruism
Schino, Gabriele - In: Behavioral Ecology 18 (2007) 1, pp. 115-120
Grooming and agonistic support are 2 common primate behaviors that have been hypothesized to constitute examples of … reciprocal altruism. In particular, because primates often direct their grooming up the dominance hierarchy, it has been … suggested that they may exchange grooming for agonistic support. Empirical tests of this hypothesis have resulted in highly …
Persistent link: https://www.econbiz.de/10008581472
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Grooming among female Japanese macaques: distinguishing between reciprocation and interchange
Schino, Gabriele; Ventura, Raffaella; Troisi, Alfonso - In: Behavioral Ecology 14 (2003) 6, pp. 887-891
Grooming among female Japanese macaques (Macaca fuscata) was studied to test some predictions derived from the … application of biological market theory. Contrary to expectations, Japanese macaques did not time match the duration of grooming … reciprocated and nonreciprocated grooming in different ways. However, they did reciprocate total amount of grooming received. These …
Persistent link: https://www.econbiz.de/10008581772
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Grooming in desert bighorn sheep (Ovis canadensis mexicana) and the ghost of parasites past
Mooring, Michael S.; Hart, Benjamin L.; Fitzpatrick, … - In: Behavioral Ecology 17 (2006) 3, pp. 364-371
Ectoparasites such as ticks have a negative effect on host fitness, whereas parasite-defense grooming is effective in … removing ticks. The central control (programmed grooming) model proposes that animals engage in preventive tick …-defense grooming in response to an internal timing mechanism, even in the absence of peripheral stimulation from parasites. This model …
Persistent link: https://www.econbiz.de/10008581922
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Immune system activation affects male sexual signal and reproductive potential in crickets
Fedorka, Kenneth M.; Mousseau, Timothy A. - In: Behavioral Ecology 18 (2007) 1, pp. 231-235
Parasite-mediated sexual selection theory posits that individuals (usually females) choose mates by assessing the expression of costly secondary sexual signals, which provide reliable indications of parasite resistance. If these signals are indeed reliable, then immune-compromised males are...
Persistent link: https://www.econbiz.de/10008577355
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Condition-dependent signaling affects male sexual attractiveness in field crickets, Gryllus campestris
Holzer, Barbara; Jacot, Alain; Brinkhof, Martin W.G. - In: Behavioral Ecology 14 (2003) 3, pp. 353-359
The condition dependence of sexually selected traits is an important assumption of sexual selection theory. Several laboratory studies have documented a positive relationship between food availability, body condition, and sexual display. However, these studies might not reflect the resource...
Persistent link: https://www.econbiz.de/10008577357
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Extrapair paternity, migration, and breeding synchrony in birds
Spottiswoode, Claire; Møller, Anders Pape - In: Behavioral Ecology 15 (2004) 1, pp. 41-57
To understand interspecific patterns in the strength of sexual selection, variation in the costs and benefits of exercising mate choice needs to be evaluated. One manifestation of sexual selection in birds is the occurrence of greatly variable levels of extrapair paternity (EPP). A proposed...
Persistent link: https://www.econbiz.de/10008577368
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Experimental evidence that egg color indicates female condition at laying in a songbird
Moreno, Juan; Lobato, Elisa; Morales, Judith; Merino, … - In: Behavioral Ecology 17 (2006) 4, pp. 651-655
The signaling hypothesis of eggshell coloration in birds is based on the assumption that females of species with blue-green eggs signal their phenotypic quality to their mates through deposition of the antioxidant biliverdin as pigment. Egg pigmentation may be an expression of the condition of...
Persistent link: https://www.econbiz.de/10008581266
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Genetic similarity, extrapair paternity, and offspring quality in Savannah sparrows (Passerculus sandwichensis)
Freeman-Gallant, Corey R.; Wheelwright, Nathaniel T.; … - In: Behavioral Ecology 17 (2006) 6, pp. 952-958
The occurrence of extrapair paternity (EPP) in birds is often attributed to the action of good-genes sexual selection whereby females "trade up" on male genetic quality by allocating fertilizations to males with better genes than those possessed by their social mate. To date, most studies of EPP...
Persistent link: https://www.econbiz.de/10008581267
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Evidence for the signaling function of egg color in the pied flycatcher <it>Ficedula hypoleuca</it>
Moreno, Juan; Morales, Judith; Lobato, Elisa; Merino, … - In: Behavioral Ecology 16 (2005) 5, pp. 931-937
A recent hypothesis proposes that the bright colors, especially blue and green, of many avian eggs may function as signals of female or offspring phenotypic quality or condition to males in species with biparental care, inducing them to allocate more effort to their offspring. The pigment...
Persistent link: https://www.econbiz.de/10008581268