Polygyny and female breeding failure reduce effective population size in the lekking Gunnison sage-grouse

Stiver, Julie R.; Apa, Anthony D.; Remington, Thomas E.; Gibson, Robert B.

doi:10.1016/j.biocon.2007.10.018

Cited by 47 publications

(46 citation statements)

References 51 publications

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“…Excluding these populations, we obtained a ratio (0.34) very similar to the one reported for other mammals (Frankham 1995). This ratio seems reasonable, given that Alpine ibex are highly polygynous, leading to a high variance in reproductive success of males and, in turn, to reduced Ne (Hoelzel 1999;Stiver et al 2008). However, it is possible that the Ne/ Nc ratio is biased upwards.…”

Section: Contemporary Effective Population Sizesupporting

confidence: 74%

“…In addition to variance introduced by the low precision of the Ne estimates (Nei and Tajima 1981;Waples 1989), other factors such as variance in family size or differences in sex ratio may also have contributed to the variation in Ne among populations. For example, some studies have reported an increased variance in reproductive success in larger populations (Ardren and Kapuscinski 2003;Hedrick 2005;Stiver et al 2008). Additionally, hunting schemes and intensities differ among ibex populations, and this might affect Ne differently (Ryman et al 1981;Allendorf et al 2008).…”

Section: Contemporary Effective Population Sizementioning

confidence: 97%

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Inbreeding in reintroduced populations: the effects of early reintroduction history and contemporary processes

Biebach

Keller

2009

Conserv Genet

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Maintaining genetic variation and minimizing inbreeding are central goals of conservation genetics. It is therefore crucial to understand the important population parameters that affect inbreeding, particularly in reintroduction programs. Using data from 41 reintroduced Alpine ibex (Capra ibex ibex) populations we estimated inbreeding since the beginning of reintroductions using population-specific Fst, and inbreeding over the last few generations with contemporary effective population sizes. Total levels of inbreeding since reintroduction of ibex were, on average, close to that from one generation of half-sib mating. Contemporary effective population sizes did not reflect total inbreeding since reintroduction, but 16% of variation in contemporary effective population sizes among populations was due to variation in current population sizes. Substantial variation in inbreeding levels among populations was explained by founder group sizes and the harmonic mean population sizes since founding. This study emphasizes that, in addition to founder group sizes, early population growth rates are important parameters determining inbreeding levels in reintroduced populations.

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Section: Contemporary Effective Population Sizesupporting

confidence: 74%

Section: Contemporary Effective Population Sizementioning

confidence: 97%

Inbreeding in reintroduced populations: the effects of early reintroduction history and contemporary processes

Biebach

Keller

2009

Conserv Genet

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“…This has been demonstrated both theoretically [7][8][9][10][11][12] and experimentally [13]. Other factors that affect the variance in reproductive success, and thus N e , are multiple paternity within broods [14], population subdivision [15] and variance in female fecundity [16][17][18]. Nunney [16] examined different types of variation in female fecundity and found that consistent individual effects decreased the effective population size more than random effects or age-related effects.…”

Section: Introductionmentioning

confidence: 99%

The influence of persistent individual differences and age at maturity on effective population size

2011

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Ratios of effective populations size, N e , to census population size, N, are used as a measure of genetic drift in populations. Several life-history parameters have been shown to affect these ratios, including mating system and age at sexual maturation. Using a stochastic matrix model, we examine how different levels of persistent individual differences in mating success among males may affect N e /N, and how this relates to generation time. Individual differences of this type are shown to cause a lower N e /N ratio than would be expected when mating is independent among seasons. Examining the way in which age at maturity affects N e /N, we find that both the direction and magnitude of the effect depends on the survival rate of juveniles in the population. In particular, when maturation is delayed, lowered juvenile survival causes higher levels of genetic drift. In addition, predicted shifts in N e /N with changing age at maturity are shown to be dependent on which of the commonly used definitions of census population size, N, is employed. Our results demonstrate that patterns of mating success, as well as juvenile survival probabilities, have substantial effects on rates of genetic drift.

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“…Life history traits such as a lek breeding behaviour, which all Tympanuchus grouse possess, evolved in a landscape that allowed large contiguous populations, yet when the species is forced to occupy small isolated fragments, such traits can become a negative attribute by further suppressing the effective population size and increasing the rate of genetic diversity loss due to drift (e.g. Johnson et al 2004;Stiver et al 2008). Previous work quantifying mitochondrial DNA (mtDNA) genetic variation within the heath hen population 30 years before its extinction documented lower haplotype diversity compared to greater prairie-chicken (T. c. pinnatus) populations in the midwest U.S. that had also experienced a genetic bottleneck (Johnson & Dunn 2006; see also Palkovacs et al 2004).…”

Section: Pre-extinction Genetic Bottleneckmentioning

confidence: 99%

Maximising evolutionary potential in functional proxies for extinct species: a conservation genetic perspective on de‐extinction

2017

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Summary 1.De-extinction sensu stricto is the resurrection of phenotypic traits once possessed by extinct species to create extant functional proxies. To realise the ecological benefit of de-extinction, self-sustaining (genetically viable) populations of functional proxies are required. 2. It is often implied, yet rarely stated, that the genetic challenges associated with the survival and recovery of extant threatened species in an effort to conserve biodiversity are also relevant to the use of functional proxies of extinct species as a conversation tool. 3. Here, we highlight the importance of prioritising evolutionary potential À the capacity to evolve (adapt) in response to environmental change À in populations of functional proxies. 4. We use conservation genetic principles to describe impediments to the creation and maintenance of evolutionary potential as a series of potentially unavoidable genetic bottlenecks (preextinction, resurrection, captive, translocation). 5. To give any successfully translocated populations of functional proxies the best chance to survive beyond the first few generations in the wild, we advocate the use of a holistic framework that includes the creation of sufficiently large, genetically diverse populations that harbour the ability to adapt to a changing environment.

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Polygyny and female breeding failure reduce effective population size in the lekking Gunnison sage-grouse

Cited by 47 publications

References 51 publications

Inbreeding in reintroduced populations: the effects of early reintroduction history and contemporary processes

Inbreeding in reintroduced populations: the effects of early reintroduction history and contemporary processes

The influence of persistent individual differences and age at maturity on effective population size

Maximising evolutionary potential in functional proxies for extinct species: a conservation genetic perspective on de‐extinction

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