NDLI: No relationship between microsatellite variation and neonatal fitness in Antarctic fur seals, Arctocephalus gazella.

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No relationship between microsatellite variation and neonatal fitness in Antarctic fur seals, Arctocephalus gazella.

Content Provider	Semantic Scholar
Author	Forcada, Jaume Amos, William
Copyright Year	2006
Abstract	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 However, there is concern that this picture may be misleading because negative results frequently go unpublished.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 the relationship between genotypic variation at nine highly variable microsatellite loci and neonatal fitness in 1070 Antarctic fur seal pups born at Bird Island, South Georgia. Despite our relatively large sample size, we find no significant association between three different measures of heterozygosity and two fitness traits, birth weight and survival. Furthermore, increasing genetic resolution by calculating parental relatedness also yields no association between genetic variation and fitness. Our findings are consistent with necropsy data showing that most pups die from starvation or trauma, conditions that are unlikely to be influenced strongly by genetic factors, particularly if the benefits of high heterozygosity are linked to immune-related genes.
Starting Page	1995
Ending Page	2005
Page Count	11
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.uni-bielefeld.de/biologie/animalbehaviour/hoffman/publications/Hoffman_et_al_2006a.pdf
PubMed reference number	16689914v1
Volume Number	15
Issue Number	7
Journal	Molecular ecology
Language	English
Access Restriction	Open
Subject Keyword	Arctocephalus Autopsy Birth Weight Fur Seals Gazella dorcas x leptoceros Genotype Hereditary Diseases Heterozygote Mental association Phocidae Trait Variation (Genetics) Wounds and Injuries benefit
Content Type	Text
Resource Type	Article

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