Data/hora: 14/06/2024 03:31:57

Provedor de dados: 	Acta Scientiarum: Animal Sciences	
País: 	Brazil	
Título: 	Reproductive performance of female Nile tilapia under different environments and age classes

Reproduction performance of female Nile tilapia under different environments and age classes	
Autores: 	Yoshida, Grazyella Massako; Oliveira, Carlos Antonio Lopes de; Kunita, Natalí Miwa; Rizzato, Gabriel Soriani; Ribeiro, Ricardo Pereira.	
Data: 	2015-08-05	
Ano: 	2015	
Palavras-chave: 	5.04.05.00-4 Oreochromis niloticus  spawning  Tilamax  volume of eggs Oreochromis niloticus; Spawning; Volume of eggs.	
Resumo: 	The objective of this work was to verify the reproductive performance of females Nile tilapia in different age classes and reproductive environments. The data set was composed of 451 females evaluated in two different environments in Maringá, PR (hapas of 10 m3, place 1 and hapas of 1 m3, place 2) and in one environment in Alfenas, MG (place 3). The females were separated into three age classes, corresponding to animals with 1 (age 1), 2 (age 2), and 3 years old (age 3). The spawning verification was performed once a week in the period of October/2012 to March/2013, corresponding to 23 weeks of evaluation. The statistical analyses were performed using the Proc Genmod from the statistical program SAS. Place 2 showed the lowest results compared to the other places for multiple spawning, spawning frequency, and volume of eggs/female using animals of age 2. Statistical differences were not observed between ages 1 and 2 considering the same assessment place; however, the age 3 presented at the place 3 showed superior results than females of age 2. Therefore, avoid the use of animals in individual hapas and maintain older females in the squad can improve the reproductive results.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/25907

10.4025/actascianimsci.v37i3.25907	
Editor: 	Editora da Universidade Estadual de Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/25907/pdf_95	
Formato: 	application/pdf	
Fonte: 	Acta Scientiarum. Animal Sciences; v. 37, n. 3 (2015); 221-226

Acta Scientiarum. Animal Sciences; v. 37, n. 3 (2015); 221-226

1807-8672

1806-2636