Comparison of two methods of synchronization of estrus in brown brocket deer (Mazama gouazoubira) |
| |
| Authors: | Eveline dos Santos Zanetti Bruna Furlan Polegato José Maurício Barbanti Duarte |
| |
| Institution: | 1. Deer Research and Conservation Center (NUPECCE – Núcleo de Pesquisa e Conservação de Cervídeos), Departamento de Zootecnia, 14884-900 Jaboticabal, SP, Brazil;2. Programa de Pós-graduação em Medicina Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, 14884-900 Jaboticabal, SP, Brazil;1. Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, Km 4, CP D 10, Cep 62011-000, Sobral, CE, Brazil;2. Universidade Federal de Viçosa, Av. PH Rolfs s/n, Cep 36570-900, Viçosa, MG, Brazil;3. Embrapa Gado de Leite, Rua Eugênio do Nascimento, 610, Dom Bosco, Cep 36038-330, Juiz de Fora, MG, Brazil;4. Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Via de Acesso Prof. Paulo Donato Castellane, s/n, Cep 14884-900, Jaboticabal, SP, Brazil;5. University of Guelph, 50 Stone Road, N1G 2W1, Guelph, ON, Canada;6. Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Cep 24230-340, Niterói, RJ, Brazil;1. Departamento de Fisiología, Facultad de Veterinaria, Universidad de la República, Montevideo, Uruguay;2. INIA-Las Brujas, Canelones, Uruguay;1. Laboratory of Non-invasive Research Technology for Endangered Species,College of Nature Conservation, Beijing Forestry University, No. 35 Tsinghua East Road, Haidian District, Beijing 100083, China;2. State Forestry Planning and Design Institute of Forest Products Industry, Beijing 100013, China |
| |
| Abstract: | This study aimed to establish a protocol for synchronization of estrus in brown brocket deer (Mazama gouazoubira). Two groups of hinds (n = 3) were submitted to two different protocols: Treatment 1 received an intravaginal progesterone (CIDR®) device for 8 days, followed by 265 μg injection of cloprostenol at the time of removal; and Treatment 2 received two injections of 265 μg of cloprostenol 11 days apart. After 30 days, each group of three hinds received the other treatment. Treatment efficacy was evaluated by reproductive behavior, fecal progestin and estrogen concentration and the observation of CL by laparoscopy 6 days after the end of estrus. All the hinds (100%) had estrous behavior upon the completion of treatment, but a significant difference occurred between the time of onset, 70.5 ± 5.0 h for Treatment 1 and 52.3 ± 5.6 h for Treatment 2. The mean estrus duration time (34.7 ± 4.50 and 37.0 ± 8.11 h), ovulation rates (5/6 and 4/6), mean CL size (4.85 ± 0.74 and 3.21 ± 0.19 mm) and mean fecal progestin concentration at 6 days after the end of estrus (865.53 ± 76.59 and 1073.35 ± 106.82 ng/g feces) were not significantly different between treatments. There was no difference in fecal estrogen concentrations throughout the treatment and the greatest values of the estrogen:progestin ratio coincided with estrous behavior. Although fertility was not evaluated directly, both treatments were effective in synchronizing estrus in the species M. gouazoubira, with the formation of functional corpora lutea. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
