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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Seasonal Changes in the thermal tolerances of Odontophrynus occidentalis (BERG, 1896) (Anura: Cycloramphidae)

Eduardo Sanabria, Lorena Quiroga, and Adolfo Martino (2013)

Seasonal Changes in the thermal tolerances of Odontophrynus occidentalis (BERG, 1896) (Anura: Cycloramphidae)


We studied the thermal tolerances of Odontophrynus occidentalis during the dry and wet seasons of the Monte Desert in San Juan Province, Argentina. This toad had differences in CTmax between dry and wet seasons, with CTmax values being greater in the wet season (Austral summer). Operative temperature, body temperature, and environmental maximal temperature were related to CTmax suggesting seasonal acclimatization in O. occidentalis. Additionally, the CTmax recorded for O. occidentalis was 36.1 degrees C, and the maximum ambient temperature measured during the toads' activity time was 37 degrees C. The CTmin of O. occidentalis was 4.1 degrees C while the minimum environmental temperature recorded was 7.2 degrees C. The wide tolerance range observed and the relationship between tolerance limits and the environmental extremes indicate that seasonal acclimatization is an effective mechanism by which toads can raise their thermal tolerance. This is a highly relevant adaptation allowing them to survive in the challenging conditions of the Monte Desert.

Amphibia; Argentina; Monte Desert; Seasonal Acclimatization; Thermal Tolerance
  • ISSN: 0777-6276

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium


Annales de la Société malacologique de Belgique
​Annales de la Société royale malacologique et zoologique de Belgique
Annales de la Société Royale Zoologique de Belgique
Belgian Journal of Zoology