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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.)

Profile of cortisol, glycaemia, and blood parameters of American Bullfrog tadpoles Lithobates catesbeianus exposed to density and hypoxia stressors

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Author(s):
Teixeira, Patricia C. [1] ; Dias, Danielle C. [1] ; Rocha, Guilherme C. [2] ; Antonucci, Antonio M. [2] ; Franca, Fernanda M. [2] ; Marcantonio, Adriana S. ; Ranzani-Paiva, Maria Jose T. [2] ; Ferreira, Claudia M. [2]
Total Authors: 8
Affiliation:
[1] Univ Estadual Paulista Unesp, CA, BR-14884900 Jaboticabal, SP - Brazil
[2] SAA, Inst Pesca, BR-05001900 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Pesquisa Veterinária Brasileira; v. 32, n. 1, p. 91-98, DEC 2012.
Web of Science Citations: 5
Abstract

Teixeira P. C., Dias D. C., Rocha G. C., Antonucci A. M., Franca F. M., Marcantonio A. S., Ranzani-Paiva M.J.T. \& Ferreira C. M. 2012. Profile of cortisol, glycaemia, and blood parameters of American Bullfrog tadpoles Lithobates catesbeianus exposed to density and hypoxia stressors. Pesquisa Veterinaria Brasileira 32(Supl.1):91-98. Setor de Patologia Veterinaria, Faculdade de Veterinaria, Universidade Federal do Rio Grande do Sul, Av. Bento Goncalves 9090, Porto Alegre, RS 91540-000, Brazil. E-mail: claudia@pesca.sp.gov.br The aim of this study was to evaluate alterations to the physiological profile (cortisol, glycaemia, and blood parameters) of Lithobates catesbeianus caused by the stressors density and hypoxia. The organisms were in the prometamorphosis stage and exposed to different tadpole densities: 1 tadpole/L (T1), 5 tadpoles/L (T2), and 10 tadpoles/L (T3) for 12 days. The blood was collected through the rupture of the caudal blood vessel and collected under normoxia (immediate collection) and hypoxia (after 15 minutes of air exposure) conditions. Cortisol levels rose on the fourth and eighth days of treatment and returned to basal levels by the end of the experiment. The stressor mechanisms tested did not affect glycaemia. White blood cells (total number of lymphocytes, neutrophils, and eosinophils) showed a significant difference at the twelfth day of the experiment when compared with the start of the experiment. We concluded that, under controlled conditions, a density of up to 10 tadpoles/L and air exposure for 15 minutes did not cause harmful physiological alterations during the experimental period. The answer to these stressors maybe was in another hormonal level (corticosterone). (AU)