Does kin selection influence fostering behaviour in Antarctic fur seals ( Arctocephalus gazella )?
نویسندگان
چکیده
منابع مشابه
No relationship between microsatellite variation and neonatal fitness in Antarctic fur seals, Arctocephalus gazella.
Published studies of wild vertebrate populations have almost universally reported positive associations between genetic variation measured at microsatellite loci and fitness, creating the impression of ubiquity both in terms of the species and the traits involved. However, there is concern that this picture may be misleading because negative results frequently go unpublished. Here, we analyse t...
متن کاملEcological implications of body composition and thermal capabilities in young antarctic fur seals (Arctocephalus gazella).
In comparison with other homeotherms, young recently weaned marine mammals in high latitudes face exceptional energetic demands when foraging and thermoregulating. Lipids are an important source of energy and a major component of insulation that allows them to meet these demands. To examine the role of lipid stores in a high-latitude pinniped, we measured the body composition and thermoregulato...
متن کاملTop-down and bottom-up influences on demographic rates of Antarctic fur seals Arctocephalus gazella.
Two major drivers in population dynamics are bottom-up processes, such as environmental factors that affect foraging success, and the top-down impacts of predation. Many populations of marine mammal and seabird species appear to be declining in response to reductions in prey associated with the bottom-up effects of climate change. However, predation, which usually occurs at sea and is difficult...
متن کاملGetting long in the tooth: a strong positive correlation between canine size and heterozygosity in Antarctic fur seals Arctocephalus gazella.
Most studies of heterozygosity-fitness correlations (HFCs) in natural populations relate to fitness traits expressed early in life, whereas traits that are often more difficult to measure such as longevity and adult body size remain elusive. Teeth provide a window on an individual's life history, allowing the reliable estimation of both age and body size. Consequently, we collected paired upper...
متن کاملGene discovery in the Antarctic fur seal (Arctocephalus gazella) skin transcriptome.
Next-generation sequencing provides a powerful new approach for developing functional genomic tools for nonmodel species, helping to narrow the gap between studies of model organisms and those of natural populations. Consequently, massively parallel 454 sequencing was used to characterize a normalized cDNA library derived from skin biopsy samples of twelve Antarctic fur seal (Arctocephalus gaze...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society B: Biological Sciences
سال: 2005
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rspb.2005.3176