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| LEWANDOWSKI,Vanessa; SARY,Cesar; ETTA,Jaisa CAS; SOUZA,Felipe Pinheiro de; CASTRO,Pedro Luiz de; GOES,Elenice Souza dos Reis; OLIVEIRA,Carlos Antonio Lopes de; RIBEIRO,Ricardo Pereira; VARGAS,Lauro. |
| ABSTRACT Specimens of cultured zebrafish acquired from different fish farms in Brazil may show genetic variability and alteration in allele frequency due to genetic drift and selective pressure in a captive environment, resulting in the differentiation of productive and reproductive characteristics. The aim of this study was to evaluate the genetic variability and reproductive characteristics of 180 zebrafish specimens from six Brazilian fish farms. A deviation from the Hardy-Weinberg equilibrium was observed in all evaluated stocks. Differentiation among stocks was observed in the amount of genetic variability with respect to observed heterozygosity and the inbreeding coefficient (FIS). Genetic distance between stocks was determined through the Fst index,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal model; Consanguinity; DNA; Female; Fish larvae. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2022000200223 |
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| ZUANAZZI,Jovana Silva Garbelini; LARA,Jorge Antonio Ferreira de; GOES,Elenice Souza dos Reis; ALMEIDA,Fernanda Losi Alves de; OLIVEIRA,Carlos Antonio Lopes de; RIBEIRO,Ricardo Pereira. |
| Abstract We evaluated the effect of the length of stay out of water on stress, gene expression, pH variation, blood parameters, histological analysis and water holding capacity (WHC) in fillets of the Nile tilapia (Oreochromis niloticus) cultivated in net-tanks. For this purpose, the fishes were maintained out of water under different periods of anoxia. Three and 6 min of anoxia in the pre-slaughter period increased the blood levels and mRNA expression of heat shock protein 70 the Nile tilapia and produced fillets with a less firm texture (greater sarcomere length). The evaluated periods of anoxia did not markedly affect pH and WHC. These results demonstrate that a pre-slaughter period of acute stress of up to 6 min does not considerably affect the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: HSP70; Oreochromis niloticus; PH; Sarcomere length; Water holding capacity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000100195 |
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