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| YOSHIDA,GRAZYELLA M.; OLIVEIRA,CARLOS A.L. DE; KUNITA,NATALÍ M.; RIZZATO,GABRIEL S.; RIBEIRO,RICARDO P.. |
| ABSTRACT Genetic parameters for reproductive traits in female Nile tilapia were estimated in this study using Bayesian inference method. The data set presented information from 451 Nile tilapia females that were evaluated at two different places in Maringá - Paraná - Brazil (hapas of 1 and 10 m³) and at one location in Alfenas - Minas Gerais - Brazil. A spawning examination was conducted once a week from October 2012 to March 2013 for a total of 23 weeks of evaluation. Single-trait analyses for spawning success, multiple spawning, spawning frequency, and volume of eggs/female were performed by using the software MTGSAM Threshold. The heritability estimates were 0.14, 0.16, 0.53, and 0.08 for spawning success, multiple spawning, spawning frequency and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian Inference; Heritability; Oreochromis niloticus; Repeatability; Spawning. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502515 |
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| MELLO,FERNANDA DE; OLIVEIRA,CARLOS A.L.; RIBEIRO,RICARDO P.; RESENDE,EMIKO K.; POVH,JAYME A.; FORNARI,DARCI C.; BARRETO,ROGÉRIO V.; MCMANUS,CONCEPTA; STREIT JR,DANILO. |
| ABSTRACT Was evaluated the pattern of growth among females and males of tambaqui by Gompertz nonlinear regression model. Five traits of economic importance were measured on 145 animals during the three years, totaling 981 morphometric data analyzed. Different curves were adjusted between males and females for body weight, height and head length and only one curve was adjusted to the width and body length. The asymptotic weight (a) and relative growth rate to maturity (k) were different between sexes in animals with ± 5 kg; slaughter weight practiced by a specific niche market, very profitable. However, there was no difference between males and females up to ± 2 kg; slaughter weight established to supply the bigger consumer market. Females showed weight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gompertz curve; Body growth; Maximum growth rate; Slaughtered point. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502309 |
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| OLIVEIRA,SHEILA N. DE; RIBEIRO,RICARDO P.; OLIVEIRA,CARLOS A.L. DE; ALEXANDRE FILHO,LUIZ; OLIVEIRA,ALINE M.S.; LOPERA-BARRERO,NELSON M.; SANTANDER,VICTOR F.A.; SANTANA,RENAN A.C.. |
| ABSTRACT In this paper, the existence of a genotype x environment interaction for the average daily weight in GIFT Nile tilapia (Oreochromis niloticus) in different regions in the state of Paraná (Brazil) was analyzed. The heritability results were high in the uni-characteristic analysis: 0.71, 0.72 and 0.67 for the cities of Palotina (PL), Floriano (FL) and Diamond North (DN), respectively. Genetic correlations estimated in bivariate analyzes were weak with values between 0.12 for PL-FL, 0.06 for PL and 0.23 for DN-FL-DN. The Spearman correlation values were low, which indicated a change in ranking in the selection of animals in different environments in the study. There was heterogeneity in the phenotypic variance among the three regions and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Fish; Genetic gain; Heritability; Genetic correlation.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602931 |
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