Listar por autor "Carranza, Juan"
Mostrando ítems 1-7 de 7
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Disposable-soma senescence mediated by sexual selection in an ungulate
Carranza, Juan; Alarcos, Susana; Sánchez-Prieto, Cristina B.; Valencia-Ruíz, Juliána
; Mateos, Concha (2004-11-11)
Senescence may result from an optimal balance between current reproductive investment and bodily repair processes required for future reproduction1, a theoretical prediction difficult to prove especially in large, long-lived ... -
Fluctuating asymmetry of red deer antlers negatively relates to individual condition and proximity to prime age
Mateos, Concha; Alarcos, Susana; Carranza, Juan; Sánchez-Prieto, Cristina B.; Valencia-Ruíz, Juliána (Elsevier, 2008-09)
After about 50 years of research on fluctuating asymmetry (FA) as a reliable indicator of both individual quality and environmental stress, the enthusiasm is beginning to decline. The findings of many studies are inconsistent ... -
How should breeders react when aided by helpers?
Carranza, Juan; Polo, Vicente; Valencia-Ruíz, Juliána; Mateos, Concha; de la Cruz, Carlos (Elsevier, 2008-01)
In cooperatively breeding systems, breeders may reduce their provisioning to the brood when aided by helpers. However, this is found in only some species, and the reasons for the different reactions of breeders are far ... -
Maternal allocation in eggs when counting on helpers in a cooperatively breeding bird
Valencia-Ruíz, Juliána; Mateos, Concha; de la Cruz, Carlos; Carranza, Juan (Nordic Society Oikos, 2016)
For cooperatively breeding birds, it has been proposed that breeders should reduce their investment in eggs when they count on helpers, because this can be compensated for by helpers provisioning of nestlings. Data from ... -
Parents increase their parental effort when aided by helpers in a cooperatively breeding bird.
Valencia-Ruíz, Juliána; de la Cruz, Carlos; Carranza, Juan; Mateos, Concha (Elsevier, 2006-05)
In cooperatively breeding species, parents may be assisted by other individuals to feed the young. How breeding parents react when they receive help is poorly understood. Evidence suggests that parents usually maintain ... -
Red deer females collect on male clumps at mating areas.
Carranza, Juan; Valencia-Ruíz, Juliána (Oxford University Press, 1999-09-01)
En especies de mamíferos poligínicos como el ciervo, se asume que las hembras se distribuyen en el espacio en función de la distribución de los recursos que ellas necesitan y que son los machos los que se desplazan para ... -
Sex-specific strategies of dentine depletion in red deer
Carranza, Juan; Mateos, Concha; Alarcos, Susana; Sánchez-Prieto, Cristina B.; Valencia-Ruíz, Juliána (Oxford Academic, 2008-02-04)
Worn teeth in herbivore ungulates may be related to lower efficiency in mastication and hence lower performance. However, selection should favour maximal performance in terms of body mass and reproductive capacity during ...