Physiological response of American bullfrog tadpoles to stressor conditions of capture and hypoxia

Pesquisa Veterinária Brasileira

Guilherme C Rocha¹  Cláudia M Ferreira¹  Patrícia C Teixeira¹  Danielle C Dias¹  Fernanda M França²  Antonio M Antonucci²  Adriana S Marcantonio¹  Marcelo Lauretto¹ 

[1] ,Instituto de Pesca Laboratório de Patologia de Organismos Aquáticos São Paulo SP ,Brazil

关键词: Frogculture;    stress;    cortisol;    Lithobates catesbeianus;    frog;    amphibian;    Ranicultura;    estresse;    cortisol;    Lithobates catesbeianus;    rã;    anfíbios;   

DOI  :  10.1590/S0100-736X2010001000014

来源: SciELO

【 摘 要 】

The American bullfrog (Rana catesbeiana), recently named Lithobates catesbeianus is currently farmed for commercial purposes throughout various regions of Brazil. Stressful situations such as problems of management, inadequate facilities and environmental changes with consequent reduction of immunity are common in intensive production. The assessments of these situations of stress allow us detect these problems decreasing the injuries causes by confinement. The main objective of this study was to use the biological markers of plasma cortisol and glucose level and hematological parameters to evaluate the response of bullfrog tadpoles submitted to stressed mechanisms of capture and hypoxia. The animals were subjected to three treatments: stress due to individual capture with a hand net; stress due to batch capture with a hand net; and stress due to capture by emptying. The results obtained demonstrated that there were no statistically significant differences in the parameters tested when comparing the treatments with and without exposure to air (normoxia and hypoxia). Based on these results we can conclude that the stressful stimuli tested were not adequate to alter the biomarker tested. For the cortisol, probably this should have occurred due to the synergistic action between this hormone and thyroxin, which induces metamorphosis in these animals.

【 授权许可】

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