Effect of different protocols for estrus synchronization on reproductive performance of Santa Inês ewes under Amazon environmental conditions
| Autor: | André Ferreira Silva, João Paulo Ferreira Rufino, Roseane Pinto Martins de Oliveira, Franklyn Ferreira de Oliveira, Regina Oliveira da Silva, Marcia Lorena Monteiro da Silva |
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| Rok vydání: | 2020 |
| Předmět: |
endocrine system
040301 veterinary sciences media_common.quotation_subject progesterone Biology SF1-1100 reproduction 0403 veterinary science Animal science medicine reproductive and urinary physiology media_common Estrous cycle Pregnancy hormones 0402 animal and dairy science ewes Estrus synchronization 04 agricultural and veterinary sciences medicine.disease 040201 dairy & animal science Animal culture Pregnancy rate pregnancy Animal Science and Zoology Reproduction Food Science |
| Zdroj: | Acta Scientiarum: Animal Sciences, Vol 43, Iss 1 (2020) Acta Scientiarum. Animal Sciences; Vol 43 (2021): Publicação contínua; e48954 Acta Scientiarum. Animal Sciences; v. 43 (2021): Publicação contínua; e48954 Acta Scientiarum. Animal Sciences Universidade Estadual de Maringá (UEM) instacron:UEM Acta Scientiarum. Animal Sciences, Volume: 43, Article number: e48954, Published: 25 SEP 2020 |
| ISSN: | 1807-8672 1806-2636 |
| Popis: | The objective of this study was to evaluate the effect of different hormonal protocols on the reproductive performance of Santa Inês ewes in Amazon environmental conditions. Twenty-two Santa Inês ewes between 3 and 4 years-old were distributed in a randomized block experimental design, where the treatments consisted of two protocols for estrus synchronization (short and long) with eleven animals each. Data on the occurrence of estrus were described for each protocol. Data of estrus, pregnancy, and prolificity were firstly subjected to ANOVA and a subsequent Tukey’s test. Results were considered significant at p ≤ 0.05. The short-term protocol presented an interesting successful rate, where above 70% ewes tested had estrus. The long-term protocol also achieved a high successful rate, where above 80% ewes tested had estrus. However, comparing the protocols, the long-term protocol presented better results of positive estrus and pregnancy rates in ewes. Thus, it can be concluded that both protocols presented satisfactory results regarding estrus manifestation, and prolificity (lambs produced per ewe). However, under Amazon environmental conditions, the long-term protocol presented better results regarding positive manifestation of estrus and pregnancy rate. The objective of this study was to evaluate the effect of different hormonal protocols on the reproductive performance of Santa Inês ewes in Amazon environmental conditions. Twenty-two Santa Inês ewes between 3 and 4 years-old were distributed in a randomized block experimental design, where the treatments consisted of two protocols for estrus synchronization (short and long) with eleven animals each. Data on the occurrence of estrus were described for each protocol. Data of estrus, pregnancy, and prolificity were firstly subjected to ANOVA and a subsequent Tukey’s test. Results were considered significant at p ≤ 0.05. The short-term protocol presented an interesting successful rate, where above 70% ewes tested had estrus. The long-term protocol also achieved a high successful rate, where above 80% ewes tested had estrus. However, comparing the protocols, the long-term protocol presented better results of positive estrus and pregnancy rates in ewes. Thus, it can be concluded that both protocols presented satisfactory results regarding estrus manifestation, and prolificity (lambs produced per ewe). However, under Amazon environmental conditions, the long-term protocol presented better results regarding positive manifestation of estrus and pregnancy rate. |
| Databáze: | OpenAIRE |
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