Effect of salinity on locomotor performance and thermal extremes of metamorphic Andean Toads (Rhinella spinulosa) from Monte Desert, Argentina.
J Therm Biol
; 74: 195-200, 2018 May.
Article
em En
| MEDLINE
| ID: mdl-29801627
Rhinella spinulosa is distributed from Peru to Argentina (from 1200 to 5000â¯m elevation), inhabiting arid mountain valleys of the Andes, characterized by salty soils. The variations in soil salinity, caused by high evapotranspiration of water, can create an osmotic constraint and high thermal oscillations for metamorphsed Andean toad (R. spinulosa), affecting their thermoregulation and extreme thermal tolerances. We investigated the changes in thermal tolerance parameters (critical thermal maximum and crystallization temperature) of a population of metamorphosed R. spinulosa from the Monte Desert of San Juan, Argentina, under different substrate salinity conditions. Our results suggest that the locomotor performance of metamorphs of R. spinulosa is affected by increasing salinity concentrations in the environment where they develop. On the other hand, the thermal extremes of metamorphs of R. spinulosa also showed changes associated with different salinity conditions. According to other studies on different organisms, the increase of the osmolarity of the internal medium may increase the thermal tolerance of this species. More studies are needed to understand the thermo-osmolar adjustments of the metamorphs of toads to environmental variability.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bufonidae
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Salinidade
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Tolerância ao Sal
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Termotolerância
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Locomoção
Limite:
Animals
País/Região como assunto:
America do sul
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Argentina
Idioma:
En
Revista:
J Therm Biol
Ano de publicação:
2018
Tipo de documento:
Article
País de publicação:
Reino Unido