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| Yoshida, Grazyella Massako; Oliveira, Carlos Antonio Lopes de; Kunita, Natalí Miwa; Rizzato, Gabriel Soriani; Alexandre Filho, Luiz; Ribeiro, Ricardo Pereira. |
| Co(variance) components and genetic parameters were estimated for performance and morphometric traits in male and female Nile tilapia at different growth periods to verify the need for separate selection programs for the two genders. Data set contained information on 1,720 animals, collected in cage system. Two-trait analyses using Bayesian methodology were conducted and the records of males and females were considered distinct traits. Rates of additive genetic variance, phenotypic and heritability were higher for females in estimates for morphometric traits and higher for males in performance traits. Whereas common hatchery environment showed higher relative importance for males, the nursery caused greater variations in females. The reduction of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.04.02.00-5 Oreochromis niloticus; Sexual dimorphism; Bayesian inference.. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/25978 |
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| Schafaschek, Tânia Patrícia; Hickel, Eduardo Rodrigues; Pereira, Heber Luiz; Oliveira, Carlos Antonio Lopes de; Toledo, Vagner de Alencar Arnaut de. |
| We evaluated varroa infestation and the performance of Africanized honeybee colonies with queens selected for honey and royal jelly production, and also unselected queens, correlating with climatic variables. In Campo Alegre, Santa Catarina State, Brazil, the experiment I used 10 Langstroth hives and in Mafra, Santa Catarina State, Brazil, the experiment II was performed with 15 Schenk hives. A mapping in areas of sealed and unsealed brood, honey and pollen was carried out on days zero, 45 and 90 days after the introduction of the queen. In the experiment I, there was interaction between the type of queen selection and the evaluation period for areas of sealed brood, honey, and total stored food. The group selected for royal jelly production presented... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.04.05.02-0 queen selection; Honey production; Royal jelly production; Varroa destructor. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/26840 |
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| Yoshida, Grazyella Massako; Oliveira, Carlos Antonio Lopes de; Kunita, Natalí Miwa; Rizzato, Gabriel Soriani; Ribeiro, Ricardo Pereira. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.04.05.00-4 Oreochromis niloticus spawning Tilamax volume of eggs Oreochromis niloticus; Spawning; Volume of eggs. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/25907 |
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