Survival costs of reproduction are mediated by parasite infection in wild Soay sheep
نویسندگان
چکیده
منابع مشابه
The impact of environmental heterogeneity on genetic architecture in a wild population of Soay sheep.
This work demonstrates that environmental conditions experienced by individuals can shape their development and affect the stability of genetic associations. The implication of this observation is that the environmental response may influence the evolution of traits in the wild. Here, we examined how the genetic architecture of a suite of sexually dimorphic traits changed as a function of envir...
متن کاملMetazoan-protozoan parasite co-infections and host body weight in St Kilda Soay sheep.
For hundreds of years, the unmanaged Soay sheep population on St Kilda has survived despite enduring presumably deleterious co-infections of helminth, protozoan and arthropod parasites and intermittent periods of starvation. Important parasite taxa in young Soay sheep are strongyles (Trichostrongylus axei, Trichostrongylus vitrinus and Teladorsagia circumcincta), coccidia (11 Eimeria species) a...
متن کاملThe oxidative costs of reproduction are group-size dependent in a wild cooperative breeder
Life-history theory assumes that reproduction entails a cost, and research on cooperatively breeding societies suggests that the cooperative sharing of workloads can reduce this cost. However, the physiological mechanisms that underpin both the costs of reproduction and the benefits of cooperation remain poorly understood. It has been hypothesized that reproductive costs may arise in part from ...
متن کاملAgeing in a variable habitat: environmental stress affects senescence in parasite resistance in St Kilda Soay sheep
Despite widespread empirical evidence for a general deterioration in the majority of traits with advancing age, it is unclear whether the progress of senescence is chronologically determined, or whether factors such as environmental conditions experienced over the lifespan are more important. We explored the relative importance of 'chronological' and 'environmental' measures of age to changes i...
متن کاملDensity-dependent selection on horn phenotype in Soay sheep.
In the naturally regulated population of Soay sheep (Ovis aries L.) on Hirta (St Kilda), 12% of males and 24% of females have scurred horns. This trait reduces the competitive ability of males in the mating season but is associated with higher overwinter survival rates in both sexes (Moorcroft et al. 1996). In this paper, we show that scurred females also show higher conception rates and weanin...
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ژورنال
عنوان ژورنال: Ecology Letters
سال: 2019
ISSN: 1461-023X,1461-0248
DOI: 10.1111/ele.13275