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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Rocha, Guilherme C. [1] ; Ferreira, Claudia M. [1] ; Teixeira, Patricia C. [2] ; Dias, Danielle C. [2] ; Franca, Fernanda M. [1] ; Antonucci, Antonio M. [1] ; Marcantonio, Adriana S. [3] ; Lauretto, Marcelo [4]
Total Authors: 8
Affiliation:
[1] Inst Pesca, Lab Patol Organismos Aquat, BR-05001900 Sao Paulo - Brazil
[2] Univ Estadual Paulista, CA, BR-14884900 Jaboticabal, SP - Brazil
[3] APTA, BR-12420000 Pindamonhangaba, SP - Brazil
[4] Univ Sao Paulo, EACH, BR-05508270 Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Pesquisa Veterinária Brasileira; v. 30, n. 10, p. 891-896, OCT 2010.
Web of Science Citations: 7
Abstract

Rocha C., Ferreira C.M., Teixeira P.C., Dias D.C., Fran a F.M., Antonucci A.M., Marcantonio A.S. \& Lauretto M. 2010. Physiological response of American bullfrog tadpoles to stressor conditions of capture and hypoxia. Pesquisa Veterinaria Brasileira 30(10): 891-896. Laboratorio de Patologia de Organismos Aquaticos, Instituto de Pesca, Av. Francisco Matarazzo 455, Sao Paulo, SP 05001-900, Brazil. E-mail: claudia@pesca.sp.gov.br 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. (AU)