Gene flow and genetic structure of the puma and jaguar in Mexico

Zanin, Marina; Adrados, Begoña; González, Noa; Roques, Séverine; Brito, Daniel; Chávez, Cuauhtémoc; Rubio, Yamel; Palomares, Francisço

doi:10.1007/s10344-016-1019-8

Cited by 11 publications

(7 citation statements)

References 58 publications

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“…We also found a positive correlation between geographic distance and genetic differentiation for Sierra Madre Oriental and Selva Maya jaguars (Fig 6B), indicating that the genetic subdivision in this data set could be an artifact of the underlying IBD pattern and thus geographic distance among these sampling sites may be partially driving the genetic divergence detected. Recently, Zanin, Adrados [90] also reported beginning genetic divergence for jaguars studied in northwestern Mexico from southern parts of the country, which represents another region of conservation concern regarding genetic connectivity within Mexico. Our genetic analysis also identified a potential first-generation migrant (i.e.…”

Section: Discussionmentioning

confidence: 99%

Genetic Diversity and Population Structure of Mesoamerican Jaguars (Panthera onca): Implications for Conservation and Management

et al. 2016

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Mesoamerican jaguars (Panthera onca) have been extirpated from over 77% of their historic range, inhabiting fragmented landscapes at potentially reduced population sizes. Maintaining and restoring genetic diversity and connectivity across human-altered landscapes has become a major conservation priority; nonetheless large-scale genetic monitoring of natural populations is rare. This is the first regional conservation genetic study of jaguars to primarily use fecal samples collected in the wild across five Mesoamerican countries: Belize, Costa Rica, Guatemala, Honduras, and Mexico. We genotyped 445 jaguar fecal samples and examined patterns of genetic diversity and connectivity among 115 individual jaguars using data from 12 microsatellite loci. Overall, moderate levels of genetic variation were detected (NA = 4.50 ± 1.05, AR = 3.43 ± 0.22, HE = 0.59 ± 0.04), with Mexico having the lowest genetic diversity, followed by Honduras, Guatemala, Belize, and Costa Rica. Population-based gene flow measures (FST = 0.09 to 0.15, Dest = 0.09 to 0.21), principal component analysis, and Bayesian clustering applied in a hierarchical framework revealed significant genetic structure in Mesoamerican jaguars, roughly grouping individuals into four genetic clusters with varying levels of admixture. Gene flow was highest among Selva Maya jaguars (northern Guatemala and central Belize), whereas genetic differentiation among all other sampling sites was moderate. Genetic subdivision was most pronounced between Selva Maya and Honduran jaguars, suggesting limited jaguar movement between these close geographic regions and ultimately refuting the hypothesis of contemporary panmixia. To maintain a critical linkage for jaguars dispersing through the Mesoamerican landscape and ensure long-term viability of this near threatened species, we recommend continued management and maintenance of jaguar corridors. The baseline genetic data provided by this study underscores the importance of understanding levels of genetic diversity and connectivity to making informed management and conservation decisions with the goal to maintain functional connectivity across the region.

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Section: Discussionmentioning

confidence: 99%

Genetic Diversity and Population Structure of Mesoamerican Jaguars (Panthera onca): Implications for Conservation and Management

et al. 2016

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“…The highest recorded inbreeding coefficient was 9.4% (Figure 2). When we comparing our result with the result in the study Zanin et al (2016) because genetic purity is not entirely certain and the ancestors who consider themselves to be the founders do not have precisely defined relationships between the other ancestors. It can't be denied that the founders already had a certain percentage of inbreeding which they later transferred to their offspring.…”

Section: Resultsmentioning

confidence: 80%

Genetic diversity of Barbary lion based on genealogic analysis

Lehocká

Hanusová²,

Kadlečík³

2018

Acta fytotechn zootechn

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The aim of this study was to evaluate the state of genetic diversity in population of Barbary lion based on the genealogical analysis. Currently, this lion subspecies does not occur in the wild, and its population is considered to be critically endangered. The pedigree file consisted of 545 animals, while the reference population included 445 individuals. Alongside pedigree completeness, the parameters derived from common ancestor were used to analyse the state of genetic diversity in target population. The completeness of pedigree data had significantly decreasing tendency with increasing generations. The pedigree completeness index was the highest in the first generation (68%). The average value of the inbreeding coefficient was very similar in the reference population and the pedigree file (F = 0.05). Across generations, the trend of inbreeding increase was positive mainly due to the long-term use of specific lines and families for mating. The relative high average relatedness among individuals (AR = 0.06) only reflected the individual increase in inbreeding (3.18%). As expected the higher level of individual increase in inbreeding was found in the pedigree file (3.41%). The effective population size at level 26.66 confirmed that the Barbary lion is critically endangered by the loss of diversity. Because of this, the future continuous monitoring of genetic diversity of this subspecies is necessary, especially for long-term conservation purposes.

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“…As a result, we infer that the lack of population subdivision in this vast region implies far-reaching amounts of gene flow throughout the landscape. A significant signal of IBD was detected from 0 to 150 km, and this pattern is expected as the individuals are more closely related in shorter distances, with genetic relatedness gradually fading away (Zanin et al, 2016). The extent of the genetic neighbourhood, where genetic correlation is negatively associated with distance, was estimated to lie between 300 and 400 km (Fig.…”

Section: High Connectivity In the Amazonmentioning

confidence: 80%