Caracterización espacio-temporal del hábitat y presencia de Dermatemys mawii (Testudines: Dermatemydidae) en la cuenca del Grijalva-Usumacinta, Tabasco, México

Ruíz, Claudia Elena Zenteno; Macías, Everardo Barba; Bello-Gutiérrez, Joaquín; Ochoa-Gaona, Susana

doi:10.15517/rbt.v58i4.5409

Cited by 7 publications

(17 citation statements)

References 23 publications

(15 reference statements)

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“…Some places like La Union, in the high part of Rio Hondo, showed a higher relative abundance to those recently registered in Tabasco [25] and Belize [8], where the species populations tend to decrease [6,10,11]. We know that in southeast Quintana Roo, the species has remained relatively abundant in some places, despite being under clandestine exploitation for commerce and personal consumption [3,16]; but this does not exclude the risk of extinction of some populations in the area, as it has been documented in other localities along the species distribution [5,12].…”

Section: Discussionmentioning

confidence: 57%

“…Although there is a bigger probability to find the Central American River Turtle in habitats with a large availability of food and shelters [24,25]; our analyses show that from 12 variables evaluated in sites near the Chetumal Bay, only salinity stands out as a limiting factor for the species distribution. In the case of reptiles that inhabit fresh waters, salinity is recognized as a limiting factor for the colonization of estuarine waters, the lack of osmoregulation processes in some reptiles play an important role is their absence of in saline waters [40].…”

Section: Discussionmentioning

confidence: 70%

“…In our case, the lack of a detailed map with the salinity values and Bathymetry of the water bodies to a convenient scale prevents a higher precision in the models [28,43]. Detailed maps for depth, slope, bottom vegetation and dissolved oxygen, could improve the distribution and abundance modeling for the species [24,25]. …”

Section: Discussionmentioning

confidence: 96%

“…As it is the case for species subjected to exploitation. At the time of capture, we recorded certain environmental variables that influence the distribution of D. mawii according to Ureña-Arana [24] and Zenteno-Ruiz et al [25]; habitats with greater availability of shelters and resources as well as high depth and riparian vegetation are the most likely to harbor the species. We also recorded additional variables identified by the fishermen we interviewed as being important to the species.…”

Section: Relative Abundancementioning

confidence: 99%

“…We measured relative abundance of D. mawii across sites by comparing the number of captures per unit effort [25]. We evaluated the relationships between the environmental variables and D. mawii abundance using Pearson' correlation coefficient (α=0.05) [26].…”

Section: Relative Abundancementioning

confidence: 99%

See 4 more Smart Citations

Distribution and Abundance of the Central American River Turtle, Dermatemys Mawii, in Southern Quintana Roo, Mexico: Implications for a Regional Conservation Strategy

Rr¹,

Ha²,

Oa³

2017

J Biodivers Endanger Species

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We estimated the distribution and abundance of the Central American River Turtle, Dermatemys mawii, in four aquatic systems in southern Quintana Roo, Mexico. Using nets and free diving we captured 52 individuals D. mawii among the winter, dry and rainy seasons. We recorded 12 variables to characterize the habitat and correlated these with the abundance of D. mawii. Using catching per unit effort, we evaluated the species' relative abundance for each aquatic system. Using Maxent, we modeled the potential distribution of D. mawii using historical and present locality data. We recorded 81 D. mawii individuals using systematic sampling and casual observations. La Union was the site with the highest relative abundance (~4 ind.-net). We found a negative correlation between D. mawii abundance and salinity. The model of potential distribution identified sites with ecological conditions suitable for the species where it is undocumented. Information about the ecology of this species remains scarce, but we propose that identifying management units could improve conservation of the species at local and regional levels.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 96%

Section: Relative Abundancementioning

confidence: 99%

Section: Relative Abundancementioning

confidence: 99%

See 3 more Smart Citations

Distribution and Abundance of the Central American River Turtle, Dermatemys Mawii, in Southern Quintana Roo, Mexico: Implications for a Regional Conservation Strategy

Rr¹,

Ha²,

Oa³

2017

J Biodivers Endanger Species

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Aprovechamiento Del Paisaje Y Manejo De La Fauna en Palenque, Chiapas

Scherrer

Stuardo

2021

Ancient Mesoam

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RESUMEN El estudio del aprovechamiento animal en las ciudades mayas de tierras bajas ha ido en considerable aumento durante los últimos años, incorporando metodologías que han permitido discernir prácticas de cacería, manejo, y cautiverio de algunas especies. En Palenque, los estudios zooarqueológicos poseen una tradición netamente biológica, los cuáles han sido relevantes para entender el aprovechamiento de la fauna en el sitio. Sin embargo, orientados casi en su totalidad en identificar las especies encontradas, carecen de un enfoque social. Desde 2016, el Proyecto Regional Palenque (PREP) ha llevado a cabo estudios zooarqueológicos en el Grupo IV de Palenque, un conjunto habitacional de élite del clásico tardío, en dónde a través de la flotación de sedimentos se ha recuperado una variada fauna, principalmente peces dulceacuícolas, así como restos botánicos que nos permite una interpretación más detallada de los paleopaisajes que rodeaban los asentamientos y discernir prácticas de manejo de poblaciones animales dentro y en los alrededores de las ciudades mayas.

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Genetic Relationship Between Founders of a Threatened Freshwater Turtle in a Mexican Wildlife Management Unit. A Conservation Strategy

Gallardo-Alvarez,

Lesher-Gordillo,

Machkour-M’Rabet

et al. 2023

Tropical Conservation Science

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Management Units for Wildlife Conservation (UMAs according to its Spanish acronym), are used for the ex-situ reproduction of freshwater turtles. These areas, often administered by local communities, are dedicated to conservation and sustainable management. The critically endangered freshwater turtle Dermatemys mawii has been successfully reproduced in several UMAs; however, no genetic management plan has been developed to maintain offspring genetic variability. Therefore, this study aims to determine the kinship relationship and homozygosity through the loci index of founder individuals in three UMAs devoted to the reproduction of D. mawii for the establishment of breeding groups. We collected skin samples of D. mawii in 2017 from 117 founder individuals from three UMAs located in the state of Tabasco, southeast Mexico. Ten specific D. mawii microsatellite markers were used for genotyping the founder individuals. We estimated the pedigree relationship between founders and proposed the formation of three breeding groups to optimize the use of related and non-related individuals to meet UMA-specific objectives and evaluated the genetic diversity retention of the breeding groups. The breeding groups were integrated as follows: 1) conservation breeding group consisting of 16 unrelated females and 7 unrelated males that presented a lower level of homozygosity (< 0.4); 2) research breeding group consisting of 45 females and 16 males that were unrelated or presented a half-sibling relationship and with a medium level of homozygosity (<0.6); and 3) a sustainable breeding group comprising 29 females and 4 males that were not necessarily unrelated and with a high level of homozygosity (> 0.6). Genetic diversity retention (Ho, He) was highest for the conservation breeder group and research breeder group. UMAs can create 3 breeding groups with different objectives: 1) species conservation, 2) research, and 3) sustainable use of species. All breeding groups can retain genetic diversity. Our proposal can enrich conservation actions and sustainable use for D. mawii at both national and international levels, specifically within the Mesoamerican corridor.

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Caracterización espacio-temporal del hábitat y presencia de Dermatemys mawii (Testudines: Dermatemydidae) en la cuenca del Grijalva-Usumacinta, Tabasco, México

Cited by 7 publications

References 23 publications

Distribution and Abundance of the Central American River Turtle, Dermatemys Mawii, in Southern Quintana Roo, Mexico: Implications for a Regional Conservation Strategy

Distribution and Abundance of the Central American River Turtle, Dermatemys Mawii, in Southern Quintana Roo, Mexico: Implications for a Regional Conservation Strategy

Aprovechamiento Del Paisaje Y Manejo De La Fauna en Palenque, Chiapas

Genetic Relationship Between Founders of a Threatened Freshwater Turtle in a Mexican Wildlife Management Unit. A Conservation Strategy

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