Population genetics meets behavioral ecology

Sugg, Derrick W.; Chesser, Ronald K.; Dobson, F. Stephen; Hoogland, John L.

doi:10.1016/0169-5347(96)20050-3

Cited by 287 publications

(295 citation statements)

References 24 publications

Supporting

Mentioning

290

Contrasting

Unclassified

Order By: Relevance

“…Although our analyses provided no support for the presence of cryptic microgeographic structure, they provided strong statistical support for the presence of kin structure in a large proportion of CPs examined. Empirical research has shown that ignoring social structure can lead to serious biases in inferences drawn from molecular data with regard to the biology of the species being studied (for example, Boone and Rhodes, 1996;Latch and Rhodes, 2006), and this is because cryptic social structure in a population may lead to deviations from HWE (see Sugg et al, 1996). Although our analyses provided strong statistical support for the existence of kin structure in the I. texanus CPs, we note that the microsatellites used have low power in terms of differentiating half-sibs from unrelated individuals (Type II errorE50%), making our estimates of kin structure conservative.…”

Section: Discussionmentioning

confidence: 99%

Heterozygote deficiencies in parasite populations: an evaluation of interrelated hypotheses in the raccoon tick, Ixodes texanus

2010

View full text Add to dashboard Cite

Population genetics is increasingly being used to study the biology of parasites at the scales of both the host (infrapopulation, IP) and host population (component population, CP). In this study we tested three mechanistic hypotheses that could explain deviations from Hardy-Weinberg equilibrium (HWE) expectations due to heterozygote deficits (HDs) at the CP scale in raccoon ticks (Ixodes texanus; n ¼ 718) collected from raccoons (Procyon lotor; n ¼ 91) and genotyped at 11 microsatellite loci. These hypotheses were presence of technical issues (for example, null alleles), hierarchical structure (for example, host demography) and cryptic structure (for example, kin structure). Although statistical support for null alleles existed, their presence would also be expected to lead to an underestimation in levels of relatedness, and thus kin structure. However, we found the opposite pattern: significant HD at the IP scale being more likely in CPs with significant vs non-significant levels of kin structure. Our analyses revealed that pooling of kin groups could lead to highly variable levels of F IS among loci, a pattern usually suggestive of null alleles. We used Monte-Carlo (MC) simulations to show that the existence of subdivided breeding groups and high variance in individual reproductive success could adequately explain deviations from HWE in I. texanus. Thus, our results indicate that biological factors can lead to patterns that have usually been interpreted as technical issues (for example, null alleles), and that it is important to take such factors into consideration because loci deviating from HWE likely reflect the effects of real biological processes.

show abstract

Section: Discussionmentioning

confidence: 99%

Heterozygote deficiencies in parasite populations: an evaluation of interrelated hypotheses in the raccoon tick, Ixodes texanus

2010

View full text Add to dashboard Cite

show abstract

“…In the blacktailed prairie dog (Cynomys ludovicianus), it has been shown using Chesser's models (Chesser 1991a,b;Chesser et al 1993) that male dispersal associated with polygyny leads to the formation of high coancestry levels with negligible inbreeding (Sugg et al 1996;Dobson et al 1997). Such a situation makes the evolution of sociality possible without having to pay the costs of inbreeding depression.…”

Section: Discussionmentioning

confidence: 99%

Sex-Biased Dispersal in a Migratory Bat: A Characterization Using Sex-Specific Demographic Parameters

Petit

Balloux

Goudet

2001

Evol

307

View full text Add to dashboard Cite

Abstract. We studied the noctule bat (Nyctalus noctula), in which the mitochondrial F ST is about 10 times that revealed by nuclear markers, to address two questions. We first verified whether random dispersal of one sex is compatible with highly contrasted mitochondrial and nuclear population structures. Using computer simulations, we then assessed the power of multilocus population differentiation tests when the expected population structure departs only slightly from panmixia. Using an island model with sex-specific demographic parameters, we found that random male dispersal is consistent with the population structure observed in the noctule. However, other parameter combinations are also compatible with the data. We computed the minimum sex bias in dispersal (at least 69% of the dispersing individuals are males), a result that would not be available if we had used more classical population genetic models. The power of multilocus population differentiation tests was unexpectedly high, the tests being significant in almost 100% of the replicates, although the observed population structure infered from nuclear markers was extremely low (F ST ϭ 0.6%).

show abstract

“…In the wild, individuals are not randomly distributed across the landscape, leading to various levels of spatial structure among and within populations (Hedrick, 2011; Sugg et al., 1996). Spatial structure may result from environmental constraints (e.g., patchy environment or presence of barriers, Epps et al., 2005), social organization (e.g., family groups or philopatry, Hazlitt, Eldridge, & Goldizen, 2004; Perrin, Allaine, & Le Berre, 1993; Storz, 1999), and demographic history (e.g., introductions, Biebach & Keller, 2009; Simpson et al., 2013).…”

Section: Introductionmentioning

confidence: 99%

Introduction history overrides social factors in explaining genetic structure of females in Mediterranean mouflon

Portanier

Garel

Devillard

et al. 2017

Ecology and Evolution

View full text Add to dashboard Cite

Fine‐scale spatial genetic structure of populations results from social and spatial behaviors of individuals such as sex‐biased dispersal and philopatry. However, the demographic history of a given population can override such socio‐spatial factors in shaping genetic variability when bottlenecks or founder events occurred in the population. Here, we investigated whether socio‐spatial organization determines the fine‐scale genetic structure for both sexes in a Mediterranean mouflon (Ovis gmelini musimon × Ovis sp.) population in southern France 60 years after its introduction. Based on multilocus genotypes at 16 loci of microsatellite DNA (n = 230 individuals), we identified three genetic groups for females and two for males, and concurrently defined the same number of socio‐spatial units using both GPS‐collared individuals (n = 121) and visual resightings of marked individuals (n = 378). The socio‐spatial and genetic structures did not match, indicating that the former was not the main driver of the latter for both sexes. Beyond this structural mismatch, we found significant, yet low, genetic differentiation among female socio‐spatial groups, and no genetic differentiation in males, with this suggesting female philopatry and male‐biased gene flow, respectively. Despite spatial disconnection, females from the north of the study area were genetically closer to females from the south, as indicated by the spatial analysis of the genetic variability, and this pattern was in accordance with the common genetic origin of their founders. To conclude, more than 14 generations later, genetic signatures of first introduction are not only still detectable among females, but they also represent the main factor shaping their present‐time genetic structure.

show abstract

Population genetics meets behavioral ecology

Cited by 287 publications

References 24 publications

Heterozygote deficiencies in parasite populations: an evaluation of interrelated hypotheses in the raccoon tick, Ixodes texanus

Heterozygote deficiencies in parasite populations: an evaluation of interrelated hypotheses in the raccoon tick, Ixodes texanus

Sex-Biased Dispersal in a Migratory Bat: A Characterization Using Sex-Specific Demographic Parameters

Introduction history overrides social factors in explaining genetic structure of females in Mediterranean mouflon

Contact Info

Product

Resources

About