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2 resultados encontrados para: AUTOR: Pinilla Buitrago, Gonzalo
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Resumen en: Inglés |
Resumen en inglés

Cracids are among the most vulnerable groups of Neotropical birds. Almost half of the species of this family are included in a conservation risk category. Twelve taxa occur in Mexico, six of which are considered at risk at national level and two are globally endangered. Therefore, it is imperative that high quality, comprehensive, and high-resolution spatial data on the occurrence of these taxa are made available as a valuable tool in the process of defining appropriate management strategies for conservation at a local and global level. We constructed the CracidMex1 database by collating global records of all cracid taxa that occur in Mexico from available electronic databases, museum specimens, publications, “grey literature”, and unpublished records. We generated a database with 23, 896 clean, validated, and standardized geographic records. Database quality control was an iterative process that commenced with the consolidation and elimination of duplicate records, followed by the geo-referencing of records when necessary, and their taxonomic and geographic validation using GIS tools and expert knowledge. We followed the geo-referencing protocol proposed by the Mexican National Commission for the Use and Conservation of Biodiversity. We could not estimate the geographic coordinates of 981 records due to inconsistencies or lack of sufficient information in the description of the locality.

Given that current records for most of the taxa have some degree of distributional bias, with redundancies at different spatial scales, the CracidMex1 database has allowed us to detect areas where more sampling effort is required to have a better representation of the global spatial occurrence of these cracids. We also found that particular attention needs to be given to taxa identification in those areas where congeners or conspecifics co-occur in order to avoid taxonomic uncertainty. The construction of the CracidMex1 database represents the first comprehensive research effort to compile current, available global geographic records for a group of cracids. The database can now be improved by continuous revision and addition of new records. The CracidMex1 database will provide high quality input data that could be used to generate species distribution models, to assess temporal changes in species distributions, to identify priority areas for research and conservation, and in the definition of management strategies for this bird group. This compilation exercise could be replicated for other cracid groups or regions to attain a better knowledge of the global occurrences of the species in this vulnerable bird family.


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Resumen en: Español | Inglés |
Resumen en español

La pava cojolita (Penelope purpurascens) y el hocofaisán (Crax rubra) son dos especies de crácidos en riesgo a nivel regional y global. Su presencia en la costa noroeste de la Península de Yucatán no había sido documentada previamente, lo que demuestra que aun se tiene un conocimiento parcial de su distribución geográfica, incluso en áreas no remotas. En este estudio, presentamos evidencia de su presencia en dicha región dentro de dos áreas naturales protegidas y sus áreas de influencia. Obtuvimos los registros mediante el uso de trampas-cámara dispuestas en varios petenes de agosto a octubre de 2013. Estos registros amplían la distribución conocida de ambas especies en la Península de Yucatán y validan regionalmente los modelos de distribución geográfica generados recientemente a partir de una recopilación exhaustiva de sus registros geográficos globales existentes. Adicionalmente, proporcionamos información sobre proporción de sexos y edades, conformación de grupos y evidencia de actividad reproductiva. Dada la alta vulnerabilidad de estas especies, esta nueva información deberá incidir en la definición de estrategias adecuadas para la conservación de sus poblaciones y hábitats en la región, tanto dentro de las áreas naturales protegidas como en sus zonas de influencia.

Resumen en inglés

The Crested Guan (Penelope purpurascens) and the Great Curassow (Crax rubra) are two cracid species of conservation concern at regional and global levels. Their presence in the north western coast of the Yucatan Peninsula had not been previously documented, showing our partial knowledge of their geographic distribution, even in approachable areas. In this study, we provide evidence for their presence in the region within two natural protected areas and their surroundings. We obtained the records through the use of camera-traps deployed on Peten ecosystems from August to October 2013. These records expand the known distribution of both species in the Yucatan Peninsula, and provide regional validation to the species distribution models recently built from an exhaustive compilation of their existing global geographic records. Additionally, we give information on sex and age proportion, group composition, and evidence of reproductive activity. Given the high vulnerability of these species, this new piece of information should be considered in the definition of appropriate strategies for the conservation of their populations and habitats in the region, both within and outside the natural protected areas.