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Inbreeding depression and male fitness in black grouse
Open accessAbstract
The male lifetime lekking performance was studied, and related to inbreeding-outbreeding in a wild population of black grouse (Tetrao tetrix) in central Finland between 1989 and 1995. Inbreeding was measured as the mean heterozygosity and mean d(2) of 15 microsatellite loci. We found a significantly positive relationship between mean d(2) and lifetime copulation success (LCS), while the relationship between heterozygosity and LCS was close to significant. We also found that males that never obtained a lek territory had significantly lower mean heterozygosity than males that were observed on a territory at least during one mating season in their life. Furthermore, among males that were successful in obtaining a lek territory, LCS and mean d(2) were highest for those males that held central territories. We suggest that inbred males have a disadvantage (or outbred males have an advantage) in the competition for territories that may explain the relationships with LCS and inbreeding. Furthermore, the fact that mean d(2) was positively correlated with LCS whereas heterozygosity was not when we restricted the analysis to territorial males, suggests that mean d(2) provides more information about levels of inbreeding-outbreeding than heterozygosity alone, and potentially highlights the effects of heterosis. To our knowledge, this is the first time that measures of inbreeding and lifetime fitness have been linked in a non-isolated population. This is important in establishing that the relationships found in previous studies are not artefacts of low gene flow created by limited dispersal but a general feature of wild vertebrate populations.
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Females probably gain direct benefits by choosing an outbred male over an inbred male.
“females probably gain direct benefits by choosing an outbred (i.e. more heterozygous) male over an inbred (i.e. less heterozygous) male (e.g. because the former has smaller territory sizes [14–16] or contributes less to parental care [17] than the latter).”
From ‘Out of tune’: consequences of inbreeding on bird song (2016) · cites this paper as [15]
The Discussion (page unavailable) reports that more outbred male black grouse were more successful at obtaining lek territories and mating. It does not establish that females gain direct benefits from choosing them, or compare territory sizes or parental-care contributions between outbred and inbred males. (LLM, conf=0.83)
Experimental — accuracy not yet measuredChoosing based on heterozygosity can provide direct benefits, for example through larger territory sizes or increased parental care.
“Additionally, choosing based on heterozygosity can provide direct benefits, for example through larger territory sizes [14–16] or increased parental care [17].”
From ‘Out of tune’: consequences of inbreeding on bird song (2016) · cites this paper as [15]
The Results report a significant association between male heterozygosity and the probability of obtaining a territory (section 3; page unavailable). The paper does not establish that more heterozygous males have larger territories or that choosing them provides a direct benefit. Parental care is attached to a different citation in the citing sentence. (LLM, conf=0.86)
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Metadata
- Authors
- Höglund, J., Piertney, S. B., Alatalo, R. V., Lindell, J., Lundberg, A., & Rintamäki, P. T.
- Affiliations
- Uppsala University (SE)
- University of Aberdeen (GB)
- University of Jyväskylä (FI)
- Corresponding author
- Höglund, Jacob
- Venue
- Proceedings of the Royal Society of London. Series B: Biological Sciences
- Publisher
- The Royal Society
- Published
- 2002-04-07
- Volume
- 269
- Issue
- 1492
- Pages
- 711-715
- ISSN
- 0080-4649 (ISSN-L)
- 0962-8452
- 1471-2954
- PMC
- PMC1690954
- OpenAlex
- W2088191812
- Cited by
- 164
- References
- 38
- Citations by year
- 2024: 2 · 2023: 1 · 2022: 4 · 2021: 2 · 2020: 1 · 2019: 3 · 2018: 5 · 2017: 29 · 2016: 1 · 2015: 5 · 2014: 7 · 2013: 6 · 2012: 6
- FWCI
- 18.21
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Proceedings of the Royal Society B Biological Sciences (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Carl Tryggers Stiftelse för Vetenskaplig Forskning
- Emil Aaltosen Säätiö
- Topics
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and phenotypic traits in livestock
- Keywords
- inbreeding depression, black grouse, Tetrao tetrix, male fitness, lek mating system, mating success, heterozygosity, heterosis, microsatellite markers, gene flow, natural populations
- MeSH terms
- Animals, Birds, Genetics, Population, Heterozygote, Inbreeding, Male, Reproduction, Microsatellite Repeats
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