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Establishing the limits on the distribution of Gerrhonotus infernalis in Guanajuato state has been relatively complicated, and the presence of this species was uncertain until recently. This paper confirms the presence of Gerrhonotus infernalis for the state, expanding the range of the distribution known for the northeast of the state, based on thr...
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The anostracans crustaceans of genus Branchinecta inhabit temporary freshwater bodies.
Includes 52 species of which 12 are found in Patagonia. In this work new records for Patagonia are presented, geographic gaps are completed and the geographic distribution range is extended for six species of the genus.
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... La Reserva de la Biosfera Sierra Gorda de Guanajuato (RBSGG) es la región con mayor riqueza y endemismo de anfibios y reptiles a nivel estatal, ya que se tienen documentadas 18 y 61 especies respectivamente, que representan en conjunto el 75,2 % de la herpetofauna nativa del estado, con 20 especies exclusivas de esta zona (Hernández-Árciga et al. 2018). Sin embargo, los trabajos herpetofaunísticos que abarcan a la región son básicamente listados y ampliaciones de distribución (Campos-Rodríguez et al. 2004a, 2004b, 2009a, 2009b, 2010a, 2010b, Hernández-Árciga et al. 2013, Leyte-Manrique y Domínguez-Laso 2014, Villegas-Ruiz et al. 2015, por lo que el objetivo del presente trabajo fue estimar y comparar la diversidad, así como analizar el uso de microhábitat de la herpetofauna en dos tipos de vegetación en la RBSGG. ...
The herpetofauna is closely related to its environment. To know how this relationship takes place is necessary for developing conservation strategies, especially when taking into account that it’s a group of great importance for ecosystems and high richness in Mexico, but strongly threatened. The present work evaluated the diversity, composition, and niche breadth and overlap regarding microhabitat use in two herpetofaunal communities in different types of vegetation –pine-oak forest (BPE) and tropical deciduous forest (BTC) – in a section of the Biosphere Reserve Sierra Gorda de Guanajuato (RBSGG), located in the biologically best-conserved area of the state. Diurnal and nocturnal transects of 300 m in length were sampled for one year. 36 species were registered, of which 80.55 % affronts conservation threats. A greater diversity was estimated with Hill numbers for BPE, and the similarity between com- munities was low. Species niche breadth was low, while overlap between species pairs showed a wider range of values. This work is one of the first herpetological studies that employs the extrapolation of the first three Hill numbers to compare communities between types of vegetation in Mexico, as well as the first with and ecological aim for the RBSGG. The results obtained could serve as a resource for further
research and for the conservation of the herpetofauna of Guanajuato.
La masa relativa de nidada (MRN) es utilizada como una medida del esfuerzo reproductor en lagartijas. Las especies que no presentan cuidado parental son las que tienden a tener una MRN mayor. En este trabajo, estimamos el esfuerzo reproductor de una lagartija ovípara con supuesto cuidado parental, para esto colectamos cuatro hembras grávidas de Gerrhonotus infernalis del Parque Ecológico Chipinque, Nuevo León, México. Mantuvimos a los ejemplares en cautividad, hasta que depositaron sus huevos, posteriormente medimos la MRN y el porcentaje de peso perdido. Observamos que las hembras perdieron más del 60% de su peso después de ovopositar y la MRN alcanzó los 0.44 g, un esfuerzo reproductor igual o incluso mayor al de otras lagartijas ovíparas y vivíparas que no presentan cuidado parental. Así mismo, observamos variaciones en cuanto al cuidado parental debido a que dos de las cuatro hembras no exhibieron una respuesta defensiva en el cuidado de sus huevos.
