Genetic diversity in the Neotropical river otter, Lontra longicaudis (Mammalia, Mustelidae), in the Lower Delta of Parana River, Argentina and its relation with habitat suitability

Trigila, Anabella Paola; Gomez, Jonatan José; Cassini, Marcelo H.; Túnez, Juan Ignacio

doi:10.1007/s10750-015-2557-x

Cited by 15 publications

(4 citation statements)

References 67 publications

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“…All but one of these (Pitra et al 2011) provided mixed (or no) support for a positive relationship between SDM predictions and genetic diversity (Supporting information). For example, Trigila et al (2016) found that observed and expected heterozygosity were correlated with SDM predictions in river otters in Argentina, but that other measures of genetic diversity (number of alleles, allelic richness, inbreeding coefficient) showed no relationship with SDM predictions. Sinai et al (2019) examined the relationship between SDM predictions and allelic richness in three regions towards the edge of the range of an endangered salamander in Israel.…”

Section: Resultsmentioning

confidence: 99%

Species distribution models rarely predict the biology of real populations

et al. 2021

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Species distribution models (SDMs) are widely used in ecology. In theory, SDMs capture (at least part of ) species' ecological niches and can be used to make inferences about the distribution of suitable habitat for species of interest. Because habitat suitability is expected to influence population demography, SDMs have been used to estimate a variety of population parameters, from occurrence to genetic diversity. However, a critical look at the ability of SDMs to predict independent data across different aspects of population biology is lacking. Here, we systematically reviewed the literature, retrieving 201 studies that tested predictions from SDMs against independent assessments of occurrence, abundance, population performance, and genetic diversity. Although there is some support for the ability of SDMs to predict occurrence (~53% of studies depending on how support was assessed), the predictive performance of these models declines progressively from occurrence to abundance, to population mean fitness, to genetic diversity. At the same time, we observed higher success among studies that evaluated performance for single versus multiple species, pointing to a possible publication bias. Thus, the limited accuracy of SDMs reported here may reflect the best-case scenario. We discuss the limitations of these models and provide specific recommendations for their use for different applications going forward. However, we emphasize that predictions from SDMs, especially when used to inform conservation decisions, should be treated as hypotheses to be tested with independent data rather than as stand-ins for the population parameters we seek to know.

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Section: Resultsmentioning

confidence: 99%

Species distribution models rarely predict the biology of real populations

et al. 2021

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“…Spatial organization analysis indicated that male cumulative displacement was higher than that of females, with the latter sex showing evidence of philopatric behavior. Trigila et al (2016) analyzed the genetic diversity and individual relatedness in a L. longicaudis population located at the lower delta of Paraná River, Argentina, using eight microsatellite loci, fecal samples, and tissue samples collected from roadkilled animals. Their results, together with genetic and habitat suitability data previously obtained, were used to test whether genetic diversity, inbreeding, and parentage coefficients are related to habitat suitability both at landscape and at regional scale.…”

Section: Lontra Longicaudismentioning

confidence: 99%

Latin American aquatic mammals: an overview of 12 years focusing on molecular techniques applied to conservation

Castro

Caballero

Cunha

et al. 2023

Lat. Am. J. Aquat. Mamm.

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Ecological information useful for conservation purposes have benefitted from recent and rapid advancements in genetic techniques, revealing unknown aspects of behavior, natural history, population structure and demography of several aquatic mammal species, many of them with conservation concerns. Molecular markers have been used to define management units, to settle taxonomic uncertainties, to control illegal wildlife trade, among others, providing valuable information to decision-making to conserve and manage aquatic mammals. We review genetic studies applied to conservation-related issues involving natural populations of more than 40 species of aquatic mammals in Latin America, covering four taxonomic groups. The main goal was to assess which genetic approaches have been used and to identify gaps in genetic research relating to geographic areas and species. We reviewed studies published in peer-reviewed journals between 2011 and 2022, and found that most were focused on population structure, phylogeography, gene flow and dispersal movements. The review revealed that researchers need to increase and improve the knowledge in those species which face major conservation concern. Scarce findings were related to forensics and its application to wildlife trade. In the era of next-generation-sequencing techniques, just a few studies used genomics as a tool for monitoring gene diversity, an important goal to help us predict how species will cope with climate change events. Looking to the future we suggest which species, geographic areas and genetic studies should be prioritized in a scenario of climate change and increased human threats (e.g., fishery bycatch, habitat degradation, etc.) and the urgent need for conservation actions. Finally, we highlight the benefits of the collaborative works and the necessity of generating a conservation genetic network, with an open agenda to discuss the local and regional problematics. All in all, we strongly emphasize the generation of critical information towards the effective conservation and management of aquatic mammals in Latin America.

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“…Las técnicas no invasivas de muestreo genético se utilizan para realizar diversos estudios en distintas especies de mamíferos neotropicales (González and Barbanti Duarte 2007;RuizGarcía et al 2007;Trinca et al 2013;Rodgers and Janečka 2013;Grattarola et al 2015;Byrne et al 2015;Trigila et al 2016). Particularmente, para los mamíferos se han realizado distintos esfuerzos por optimizar la obtención de ADN a partir de pelos y heces.…”

Section: Nardelli and Ji Túnezunclassified

Aportes de la genética de la conservación al estudio de los mamíferos neotropicales: revisión y análisis crítico

Nardelli

Túnez

2017

Ecol. Austral

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R��.Si bien todos los seres vivos modifican su entorno, nuestra especie ha adquirido la capacidad de hacerlo a una escala espacio-temporal superlativa. Como resultado de la industrialización y del uso de nuevas tecnologías, el impacto antrópico ha ido en aumento en los últimos siglos, lo que causó la disminución de los tamaños poblacionales o la extinción de numerosas poblaciones silvestres. En este sentido, desde el campo de la genética de la conservación, en las últimas décadas se realizaron diversos esfuerzos para aportar conocimientos nuevos que contribuyan a la conservación de poblaciones, especies y hábitats. Las propiedades de los distintos marcadores moleculares han permitido estudiar la variabilidad genética de las especies y cómo esa variabilidad se estructura en las poblaciones y define las llamadas Unidades de Manejo, que son unidades genéticas cuyo nombre deriva de actividades extractivistas. En este artículo revisamos y analizamos críticamente los esfuerzos científicos en el área de la genética de la conservación realizados entre 2006 y 2015 en pos de la conservación de los mamíferos del Neotrópico. También criticamos el concepto de Unidad de Manejo y analizamos las perspectivas a futuro en el campo de la genética de la conservación de los mamíferos neotropicales.[Palabras clave: biología de la conservación, fauna neotropical, especies amenazadas, marcadores moleculares] A��. Contributions of conservation genetics to the study of neotropical mammals: review and critical analysis.Although all living beings modify their environment, our species has acquired the ability to do so on a superlative space-time scale. As a result of industrialization and the use of new technologies, the anthropic impact has been increasing in the last centuries, causing the decrease in population sizes or the extinction of numerous wild populations. In this sense, from the field of conservation genetics, diverse efforts have been made in the last decades in order to provide new knowledge that contributes to the conservation of populations, species and habitats. The properties of the different molecular markers have allowed studying the genetic variability of the species and how it is structured in the populations, defining the so-called Management Units, genetic units whose name derives from extractivist activities. In this article we perform a review and critical analysis of the scientific efforts in the area of conservation genetics carried out between the years 2006 and 2015 for the conservation of mammals of the Neotropics, criticize the concept of Management Unit and analyze future perspectives in the field of conservation genetics of neotropical mammals.

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Genetic diversity in the Neotropical river otter, Lontra longicaudis (Mammalia, Mustelidae), in the Lower Delta of Parana River, Argentina and its relation with habitat suitability

Abstract: Genetic diversity in the Neotropical river otter, Lontra longicaudis (Mammalia, Mustelidae), in the Lower Delta of Parana River, Argentina and its relation with habitat suitability

Cited by 15 publications

References 67 publications

Species distribution models rarely predict the biology of real populations

Species distribution models rarely predict the biology of real populations

Latin American aquatic mammals: an overview of 12 years focusing on molecular techniques applied to conservation

Aportes de la genética de la conservación al estudio de los mamíferos neotropicales: revisión y análisis crítico

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