Search Results - subject:"sexual selection"

Plumage coloration, not length or symmetry of tail-streamers, is a sexually selected trait in North American barn swallows

Safran, Rebecca J.; McGraw, Kevin J. - In: Behavioral Ecology 15 (2004) 3, pp. 455-461

environmental conditions and the associated selection pressures, such as natural versus sexual selection or the relative signaling … functions in different populations. Classic studies of sexual selection in the European barn swallow (Hirundo rustica rustica …

Persistent link: https://www.econbiz.de/10008581604

Juvenile infection and male display: testing the bright male hypothesis across individual life histories

Borgia, Gerald; Egeth, Marc; Uy, J. Albert; Patricelli, … - In: Behavioral Ecology 15 (2004) 5, pp. 722-728

years later as adults. We test hypotheses that examine the role of juvenile parasite infection in mediating sexual selection …

Persistent link: https://www.econbiz.de/10008581632

Mutual ornamentation, sexual selection, and social dominance in the black swan

Kraaijeveld, Ken; Gregurke, John; Hall, Carol; Komdeur, Jan - In: Behavioral Ecology 15 (2004) 3, pp. 380-389

assortatively with respect to curled feather number, suggesting the feathers may be involved in mutual sexual selection. More …

Persistent link: https://www.econbiz.de/10008581635

Vocal performance influences female response to male bird song: an experimental test

Ballentine, Barbara; Hyman, Jeremy; Nowicki, Stephen - In: Behavioral Ecology 15 (2004) 1, pp. 163-168

Female songbirds are thought to assess males based on aspects of song, such as repertoire size or amount of singing, that could potentially provide information about male quality. A relatively unexplored aspect of song that also might serve as an assessment signal is a male's ability to perform...

Persistent link: https://www.econbiz.de/10008581636

Extrapair paternity and the evolution of bird song

Garamszegi, László Zsolt; Møller, Anders Pape - In: Behavioral Ecology 15 (2004) 3, pp. 508-519

Bird song is usually considered to have evolved in the context of sexual selection. Because extrapair paternity is a … major component of sexual selection, mating advantages at the social level for males that produce songs of high quality may … other than postmating sexual selection have been the important evolutionary forces shaping differences in song. Copyright …

Persistent link: https://www.econbiz.de/10008581651

Nest size predicts the effect of food supplementation to magpie nestlings on their immunocompetence: an experimental test of nest size indicating parental ability

Neve, Liesbeth De; Soler, Juan José; Soler, Manuel; … - In: Behavioral Ecology 15 (2004) 6, pp. 1031-1036

Post-mating sexually selected signals are expected to indicate parental quality. The good parent model assumes that expression of the sexual character positively reflects parental ability, resulting in a potential link between the exaggeration of the character and nestling-fitness traits. We...

Persistent link: https://www.econbiz.de/10008581701

Kinship and sociality in coastal river otters: are they related?

Blundell, Gail M.; Ben-David, Merav; Groves, Pamela; … - In: Behavioral Ecology 15 (2004) 5, pp. 705-714

offspring, indicating that sexual selection did not mask a potential relation between sociality and reproductive success. Among …

Persistent link: https://www.econbiz.de/10008581705

Relative allocation to horn and body growth in bighorn rams varies with resource availability

Festa-Bianchet, Marco; Coltman, David W.; Turelli, Luca; … - In: Behavioral Ecology 15 (2004) 2, pp. 305-312

Males may allocate a greater proportion of metabolic resources to maintenance than to the development of secondary sexual characters when food is scarce, to avoid compromising their probability of survival. We assessed the effects of resource availability on body mass and horn growth of bighorn...

Persistent link: https://www.econbiz.de/10008581716

Hemolymph loss during nuptial feeding constrains male mating success in sagebrush crickets

Sakaluk, Scott K.; Campbell, Mark T. H.; Clark, Andrew P.; … - In: Behavioral Ecology 15 (2004) 5, pp. 845-849

Although costs of mating have been widely documented in females, intrinsic costs of copulation have been poorly documented in males, and there is little evidence that such costs constrain male mating success under natural conditions. Male sagebrush crickets, Cyphoderris strepitans, offer females...

Persistent link: https://www.econbiz.de/10008581801

Sexual advertisement and immune function in an arachnid species (Lycosidae)

Ahtiainen, Jari J.; Alatalo, Rauno V.; Kortet, Raine; … - In: Behavioral Ecology 15 (2004) 4, pp. 602-606

, although we could not assess the causality of the relationship between sexual selection and immune function in this …

Persistent link: https://www.econbiz.de/10008581836