Vitamin C supplementation has no effect on American bullfrog's immune response
Autor: | R. Knoop, Danielle de Carla Dias, Cláudia Maris Ferreira, Priscila Viau, Cláudio Alvarenga de Oliveira, Patricia C. Teixeira, Antonio Mataresio Antonucci, Marcio Hipolito, Fernanda Menezes França |
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Rok vydání: | 2014 |
Předmět: |
medicine.medical_specialty
Captivity Ascorbic Acid chemistry.chemical_compound Animal science Immune system Phagocytosis Food Animals Bullfrog Corticosterone Internal medicine Intensive culture medicine Animals SUPLEMENTOS ALIMENTARES PARA ANIMAIS Animal Husbandry Phagocytes Rana catesbeiana biology Vitamin C Lithobates biology.organism_classification Animal Feed Diet Endocrinology chemistry Dietary Supplements Animal Science and Zoology Plasma corticosterone |
Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
ISSN: | 0931-2439 |
DOI: | 10.1111/jpn.12207 |
Popis: | American bullfrog (Lithobates catesbeianus) is the only species raised in Brazilian commercial frog farms, and the intensive culture of these animals has gained great popularity in Brazil over the past several years. Stress is one of the major obstacles in frog culture. To minimise this problem, the aim of the present study was to investigate the role of added vitamin C in the diet of American bullfrogs as an antistress factor through the assessment of plasma corticosterone, leucocyte levels and macrophage activation in animals raised in confinement. The experimental design was entirely randomised, with six treatments (supplementation of 0, 250, 500, 750, 1000 and 2000 mg of vitamin C/kg of feed) and four replications. The plasma corticosterone level, leucocyte level and macrophage activation were evaluated. It was concluded that vitamin C had no influence on the evaluated parameters due to the possible adaptation of the animals to life in captivity (domestication). The results of this research indicate that farmers should not increase the levels of vitamin C in commercial feeds because this would only enhance production costs. |
Databáze: | OpenAIRE |
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