Hematocrit Is Associated with Thermal Tolerance and Modulated by Developmental Temperature in Juvenile Chinook Salmon.
Physiol Biochem Zool
; 91(1): 757-762, 2018.
Article
em En
| MEDLINE
| ID: mdl-29220205
ABSTRACT
To evaluate whether oxygen-carrying capacity influences thermal tolerance in fishes, we reared four Chinook salmon families in present-day (+0°C) and possible future (+4°C) temperatures and assessed the response of hematocrit (Hct) to acute temperature stress. In the +4°C treatment, Hct increased above control levels when juvenile fish were exposed to their critical thermal maximum (CTmax). Conversely, no effect of temperature stress on Hct was found in the +0°C treatment. Hct was positively associated with CTmax ([Formula see text]; [Formula see text]), contributing to the CTmax of the +4°C treatment being significantly higher than that of the +0°C treatment (mean ± SD, [Formula see text] and [Formula see text], respectively). The association between CTmax and Hct found here supports the hypothesis that thermal tolerance is affected by oxygen supply to tissue. Moreover, the developmental plasticity of CTmax and Hct could represent an adaptive mechanism for salmon faced with climate change.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Salmão
/
Temperatura
/
Termotolerância
/
Hematócrito
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
Idioma:
En
Revista:
Physiol Biochem Zool
Assunto da revista:
BIOLOGIA
/
FISIOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article