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Neonate Rio Fuertes Beaded Lizard (H. horridum exasperatum). Specimen 942 observed from southern Sonora, Mexico.
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Among the limited reports on reproduction on free-ranging helodermatid lizards (genus Heloderma; Gila Monsters and Beaded lizards) there are reports that hatching and emergence from nest cavities of Beaded Lizards, Heloderma horridum, occurs coincident with the onset of summer monsoon rains (Beck 2005). H. horridum is restricted to the tropical dec...
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... Field studies of Beaded lizards in Mexico are scarce (Balderas-Valdivia and Ramirez-Bautista, 2005;Beck and Lowe, 1991;Gienger et al., 2005), an important portion of biological knowledge regarding this group has been collected from haphazard encounters although it is a widely distributed group. Our survey gathered 226 records that correspond to three years (2010)(2011)(2012)(2013). ...
Hunting is one of the main threats to biodiversity due to its synergistic effect with other anthropogenic activities. Aversive hunting is a radical measure aimed at species considered threats to human health or goods. This practice has proved high impacts on wildlife. We quantified sighting and hunting of Beaded lizards and analyzed its relation with habitat disturbance through semi-structured interviews in seven localities. Sighting and hunting relation with habitat was analyzed individually using correlation tests and globally using discriminant function analysis. Hunting frequency is closed to 50% and justified on the potential direct threat of these species. Habitat structure explained sighting frequency but not hunting. Our study exposes that impact on Beaded lizards due to aversive hunting is high and that an education plan is required to decrease it; we also show the importance of habitat structure for the conservation of Beaded lizards.
... The results show that H. horridum occurs in areas with low rainfall at this time between 0 and 10% of the total. This provides quantitative data and strengthens the hypothesis that seasonality is important for this species ( Beck 2005;Lovich & Beaman 2007), particularly seasonally dry conditions, and might provide important cues for reproductive events, such as ovulation, spermiogenesis ( Goldberg & Beck 2001), and timing of hatching ( Gienger et al. 2005). The third variable in importance was the absence in perennial vegetation cover, confirming the preference of the species in the tropical deciduous forest. ...
In this paper, the authors have investigated energy production estimation on large-scale time from photovoltaic power generation station in Southern Tunisia. The steady-state models of the photovoltaic system have been used. The evaluation for energy production estimation of the solar generating system is developed with the integration of photovoltaic modules losses and converters losses. The design of the photovoltaic system architecture according to the project site and according to metrological data was presented. The obtained results show that even with all losses integration the photovoltaic system remains an important solution to southern Tunisia.