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Source publication
Diet and intraspecific competition in the snake Tretanorhinus nigroluteus. December 2021.
Contexts in source publication
Context 1
... 23 June 2020, at 1617 h (32.6978°N, 109.9070°W; WGS 84; 2847 m elev.), one of us (KLH) encountered an adult T. e. vagrans constricting a M. l. leucophaeus (Fig. 1). The moment of capture was not witnessed, but the vole was still vocalizing. The duration of observation was ca. 60 sec and did not include confirmation of consumption. It is known that T. e. vagrans in higher elevations will feed on small mammals, including voles (Ernst and Ernst 2003, op. cit.). However, to our knowledge, this is ...
Context 2
... comprise a substantial diet source for T. e. vagrans in the Pinaleño Mountains. BRIAN R. BLAIS (e-mail: opheodrys1@gmail.com), KIRA L. HEFTY (e-mail: klhefty@arizona.edu), and NEIL R. DUTT, School of Natural Resources and the Environment, University of Arizona, 1064 E. Lowell Street, Tucson, Arizona 85721, USA (e-mail: neildutt89@gmail.com). (Fig. 1A). One of the T. sirtalis exhibited rhythmic undulations of its body along the flanks of the rattlesnake consistent with courtship behavior for the species (List 1950. Herpetologica 6:71-74). As the S. catenatus attempted to evade the two snakes, both individuals continued to mob it, remaining in close contact for several minutes (Fig. ...
Context 3
... (Fig. 1A). One of the T. sirtalis exhibited rhythmic undulations of its body along the flanks of the rattlesnake consistent with courtship behavior for the species (List 1950. Herpetologica 6:71-74). As the S. catenatus attempted to evade the two snakes, both individuals continued to mob it, remaining in close contact for several minutes (Fig. 1B). After ca. 10 min, the S. catenatus descended into a nearby crayfish burrow, causing the two T. sirtalis to disengage their pursuit. Both T. sirtalis actively searched within 1-2 m of the crayfish burrow for several minutes before dispersing out of sight. Given that both natricine and crotaline snakes rely heavily on pheromones and ...
Context 4
... found two specimens of T. nigroluteus competing in trying to consume a Poecilia mexicana (Shortfin Molly). This fish species has a wide distribution in southeastern Mexico where it inhabits rivers and coastal lagoons (Chávez- López et al. 2015. Am. J. Life Sci. 3:76-84). At first, one of the snakes caught the fish by the middle part of the body (Fig. 1) while the other snake tried to remove it, unsuccessfully. After a while, the snake managed to engulf the anterior part of the fish (Fig. 2), supporting the observation of Villa (1970, op. cit.), that T. nigroluteus swallows its prey starting from the head. To our knowledge, this is the first record of P. mexicana being consumed by T. ...
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