Effect of the temperature and the photoperiod on the development of bullfrog (Rana catesbeiana Shaw, 1802) reproduction apparel

Revista Brasileira de Zootecnia

Figueiredo, Mario Roberto Chim¹  Lima, Samuel Lopes²  Agostinho, Claudio Angelo³  Baêta, Fernando da Costa² 

[1] Fundação Universidade Federal do Rio Grande, Rio Grande;Universidade Federal de Viçosa, Viçosa;Universidade Estadual Paulista, Botucatu

关键词: bullfrog;    environment;    development;    maturation;    photoperiod;    reproduction;    temperature   IntroduçãoO controle da reprodução de rã-touro em cativeiro tem sido grande preocupação dos pesquisadores e criadores (AGOSTINHO et al;   

DOI  :  10.1590/S1516-35982001000400002

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- The effects of the temperature and of the photoperiod on the bull frog sexual maturation of frogs weighing 94.22 g ± 12.03, maintained for thirty days under temperatures of 20, 23, 26, 29, 32 and 35°C, with photoperiod of 12/12 hours of light/hours of darkness (h L/D), were evaluated. Temperature affected the weights of the fat body and liver, that varied according to quadratic models, and higher weights of fat body at 27.27°C and of liver at 26.81°C were considered. The ovaries heavier than 28.36°C and oviducts heavier than 28.77°C were estimated. Temperature affected the sexual maturation of the frogs, evaluated by numeric indexes. In a longer experiment, frogs with initial weight of 95.31 g ± 8.46, were submitted to the combination of the temperatures of 26.0 and 29.0°C with photoperiods of 8/16, 12/12 and 16/8 h L/D, until they reach the gonadal maturity. Temperature interacted with photoperiod in its effects on the development of the reproductive organs of bullfrog. Temperature affected the diameter of the abdomen/distance relation between the eyes, with higher values calculated for 26°C. It was considered that the highest ovocites diameters are obtained under a temperature of 26.0°C, with photoperiod of 12.6/11.4 h L/D.

【 授权许可】

CC BY-NC