Reproduction performance of female Nile tilapia under different environments and age classes

Current assay verifies the reproductive performance of females of Nile tilapia in different age classes and reproductive environments. Four hundred and fifty-one females were evaluated in two different Brazilian environments, namely in Maringa, Parana State, Brazil (Site 1 - hapas of 10 m3 and Site...

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Published inActa scientiarum. Animal sciences Vol. 37; no. 3; pp. 221 - 228
Main Authors Yoshida, Grazyella Massako, Oliveira, Carlos Antonio Lopes de, Kunita, Natalí Miwa, Rizzato, Gabriel Soriani, Ribeiro, Ricardo Pereira
Format Journal Article
LanguageEnglish
Portuguese
Published Maringa Editora da Universidade Estadual de Maringá - EDUEM 01.01.2015
Subjects
Animal reproduction
Animal sciences
Biological age
Fish culture
Freshwater
Oreochromis niloticus
Reproductive behaviour
Spawning
Tilapia
VETERINARY SCIENCES
Brazil
spawning
volume of eggs
volume de ovos
desova
Oreochromis niloticus
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Summary:Current assay verifies the reproductive performance of females of Nile tilapia in different age classes and reproductive environments. Four hundred and fifty-one females were evaluated in two different Brazilian environments, namely in Maringa, Parana State, Brazil (Site 1 - hapas of 10 m3 and Site 2 - hapas of 1 m3) and in one environment in Alfenas, Minas Gerais State, Brazil (Site 3 - hapas of 14 and 28 m3). The females were divided into three age classes, corresponding to animals under one year (age 1); between one to two years (age 2); and over three years old (age 3). Spawning was verified once a week, from October 2012 to March 2013, corresponding to a 23-week assessment. The statistical analyses were performed with Proc Genmod from the statistical program SAS. Site 2 had the lowest results when compared to the other sites for multiple spawning, spawning frequency and volume of eggs/female for animals of age 2. Statistical differences were not detected between ages 1 and 2 for the same assessment site, although females at age 3 in Site 3 provided higher results than those at age 2. Results show that, precluding the use of animals in individual hapas (1 m³) and maintaining older females in the stock, may improve reproduction results.
ISSN:1806-2636
1807-8672
1807-8672
DOI:10.4025/actascianimsci.v37i3.25907