Variation in Peccary Populations: Landscape Composition or Competition by an Invader?

Gabor, Timothy M.; Hellgren, Eric C.

doi:10.2307/177471

Cited by 14 publications

(18 citation statements)

References 62 publications

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“…This is a minimum estimate, as some individuals die before or during dispersal, and the lack of mtDNA variation undoubtedly prevented our detection of dispersal between some groups. Moreover, the pronounced local genetic structure indicates that males preferentially disperse over short distances, perhaps into neighboring herds; this is congruent with trapping data (Gabor and Hellgren, 2000). The results from the age-based analysis indicate that dispersal in this species is usually accomplished by subadults (18-24 months).…”

Section: Dispersal In Pecari Tajacusupporting

confidence: 82%

“…Herds are socially cohesive and attempts to immigrate may be met with aggression, although direct observational data on dispersal behavior are still scarce. Male exchange between groups and solitary wandering of both sexes has been observed but natal dispersal has not been adequately described (Ellisor and Harwell, 1969;Day, 1985;Gabor and Hellgren, 2000). Earlier little population genetic data existed for P. tajacu (but see Gongora et al, 2006).…”

Section: Study Speciesmentioning

confidence: 99%

“…In the mid-1990s, 102 whole blood samples were collected from the Chaparral Wildlife Management Area (CWMA) in south Texas (Gabor and Hellgren, 2000). These samples were taken from livetrapped animals from 13 social groups, but not all group members were sampled.…”

Section: Samplingmentioning

confidence: 99%

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Quantifying male-biased dispersal among social groups in the collared peccary (Pecari tajacu) using analyses based on mtDNA variation

et al. 2009

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Recent advances in the statistical analysis of microsatellite data permit calculation of sex-specific dispersal rates through sexand age-specific comparisons of genetic variation. This approach, developed for the analysis of data derived from codominant autosomal markers, should be applicable to a sexspecific marker such as mitochondrial DNA. To test this premise, we amplified a 449 bp control region DNA sequence from the mitochondrial genome of the collared peccary (Pecari tajacu), and estimated intra-class correlations among herds sampled from three Texas populations. Analyses on data partitioned by breeding group showed a clear signal of malebiased dispersal; sex-specific fixation indices associated with genetic variation among social groups within populations yielded values for females (F GP ¼ 0.91), which were significantly larger than values for males (F GP ¼ 0.24; P ¼ 0.0015). The same general pattern emerged when the analyses were conducted on age classes (albeit nonsignificantly), as well as categories of individuals that were predicted a posteriori to be dispersers (adult males) and philopatric (adult females and all immatures). By extending a previously published methodology based on biparentally inherited markers to matrilineally inherited haploid data, we calculated sex-specific rates of contemporary dispersal among social groups within populations (m # ¼ 0.37). These results support the idea that mitochondrial DNA haplotype frequency data can be used to estimate sex-specific instantaneous dispersal rates in a social species.

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Section: Dispersal In Pecari Tajacusupporting

confidence: 82%

Section: Study Speciesmentioning

confidence: 99%

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Quantifying male-biased dispersal among social groups in the collared peccary (Pecari tajacu) using analyses based on mtDNA variation

et al. 2009

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“…They have the highest reproductive rate among ungulates, and their local density can double in one year (Massei et al 1997). Additionally, the species has high ecological plasticity, a very opportunistic feeding behavior and a generalist approach to landscape use (Gabor and Hellgren 2000;Geisser and Reyer 2005).…”

Section: Introductionmentioning

confidence: 99%

Achilles heel of a powerful invader: restrictions on distribution and disappearance of feral pigs from a protected area in Northern Pantanal, Western Brazil

Cordeiro

Hofmann

Fonseca

et al. 2017

Preprint

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This paper focus a rare case of natural disappearance of feral pigs (Sus scrofa) in an extensive area without using traditional methods of eradication programs. The study was conducted both in the Private Reserve of Natural Heritage (PRNH) Sesc Pantanal and in an adjacent traditional private cattle ranch. In 1998 feral pigs were abundant and widely distributed in the PRNH. However, the feral pigs were gradually disappeared from the area and currently the absence of pigs in the PRNH contrasts with the adjacent cattle ranch where the species is abundant. To understand the current distribution of feral pigs in the region we partitioned the effects of variation of feral pigs presence considering the habitat structure (local), landscape composition and the occurrence of potential predators.Additionally, we modeled the distributions of feral pigs in Northern Pantanal, projecting into the past using the classes of vegetation cover before the PRNH implementation (year 1988). Our results show areas with more suitability for feral pigs in region are a landscape dominated by pastures and permeated by patches of Seasonal Dry Forest. The species tends to avoid predominantly forested areas. Additionally, we recorded that the environmental suitability for feral pigs decreases exponentially as the distance from water bodies increases. The disappearance of feral pigs into PRNH area seems to be associated with changes in the landscape and vegetation structure after the removal of the cattle. In Our results show areas with more suitability for feral pigs in region are a landscape dominated by pastures and permeated by patches of Seasonal Dry Forest. The species tends to avoid predominantly forested areas. Additionally, we recorded that the environmental suitability for feral pigs decreases exponentially as the distance from water bodies increases. The disappearance of feral pigs into PRNH area seems to be associated with changes in the landscape and vegetation structure after the removal of the cattle. In the Brazilian Pantanal the feral pigs occurrence seems strongly conditioned to environmental changes associated to livestock activity.PeerJ Preprints | https://doi.org/10.7287/peerj.preprints.2876v1 | CC BY 4.0 Open Access | rec: 15

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“…And what hidden role do the pigs play? This species is widely documented to be environmentally destructive at most sites to which they've been introduced (14,15). Many unanswered questions are stimulated by the case study described by Roemer et al What broader context best describes this contribution?…”

mentioning

confidence: 99%

Ecological pork: Novel resources and the trophic reorganization of an ecosystem

Paine

Schindler

2002

Proc. Natl. Acad. Sci. U.S.A.

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Variation in Peccary Populations: Landscape Composition or Competition by an Invader?

Cited by 14 publications

References 62 publications

Quantifying male-biased dispersal among social groups in the collared peccary (Pecari tajacu) using analyses based on mtDNA variation

Quantifying male-biased dispersal among social groups in the collared peccary (Pecari tajacu) using analyses based on mtDNA variation

Achilles heel of a powerful invader: restrictions on distribution and disappearance of feral pigs from a protected area in Northern Pantanal, Western Brazil

Ecological pork: Novel resources and the trophic reorganization of an ecosystem

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