Consulta: creatorFacets:"Kervinen, Matti"
Registros recuperados: 2
Data/hora: 10/06/2024 06:23:59

Age, condition and dominance-related sexual ornament size before and during the breeding season in the black grouse     Lyrurus tetrix
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harris, Sarah; Kervinen, Matti; Lebigre, Christophe; Pike, Thomas W.; Soulsbury, Carl D.
Male ornaments function as honest cues of male quality in many species and are subject to intra‐ and intersexual selection. These ornaments are generally studied during peak expression, however their size outside the breeding season may determine ultimate ornament size and costliness, and as such reproductive success. We investigated whether male black grouse Lyrurus tetrix eye comb size was related to age, condition and measures of male dominance before and during the breeding season. Total combined eye comb size began to increase ~70 days before the start of the breeding season. Adult males (aged ≥ 2 years old) had consistently larger eye combs than younger males (1 year old) both before and during the breeding season. Heavier and more dominant adult...
Tipo: Text
Palavras-chave: Age; Ornament expression; Dominance.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00440/55121/56577.pdf

Simultaneous age-dependent and age-independent sexual selection in the lekking black grouse (Lyrurus tetrix)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kervinen, Matti; Lebigre, Christophe; Soulsbury, Carl D.
Individuals' reproductive success is often strongly associated with their age, with typical patterns of early-life reproductive improvement and late-life senescence. These age-related patterns are due to the inherent trade-offs between life-history traits competing for a limited amount of resources available to the organisms. In males, such trade-offs are exacerbated by the resource requirements associated with the expression of costly sexual traits, leading to dynamic changes in trait expression throughout their life span. Due to the age dependency of male phenotypes, the relationship between the expression of male traits and mating success can also vary with male age. Hence, using longitudinal data in a lekking species with strong sexual selection - the...
Tipo: Text
Palavras-chave: Annual reproductive success; Fitness; Lek; Long-term data; Mating success; Selection differential; Selection gradient; Senescence; Tetrao tetrix.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00370/48145/48270.pdf