Data/hora: 11/06/2024 02:10:17

Provedor de dados: | 83
País: | Brazil
Título: | Morphological and morphometric analysis of skeletal muscle between male and female young adult Colossoma macropomum (Characiformes: Serrasalmidae)
Autores: | Mello,Fernanda De; Felippe,Daruzi; Godoy,Leandro C.; Lothhammer,Nívia; Guerreiro,Luis R. J.; Streit Jr.,Danilo P.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Hypertrophy; Hyperplasia; Muscle growth; Sexing; Tambaqui.
Resumo: | ABSTRACT This study aimed to evaluate muscle organization in tambaqui in order to describe the muscle growth process. We analyzed the morphometric pattern of fibers from white muscle of young-adults (300 days) by smaller diameter. The organization of white muscle exhibited a typical morphological pattern found in other fish species. Heavier animals showed higher frequency of larger diameter fibers (&gt;50 μm ) and smaller animals had higher frequency of smaller diameter fibers (&lt;20 μm ) (P =0.005). However, both animals showed the same frequency of intermediate diameter fibers (20-50 μm ). Body weight showed a positive correlation with muscle diameter fiber (r=0.45), being 20-50 μm the diameters that contributed the most to animal weight (P &lt;0.0001). A weak correlation between fiber diameter and animal sex was observed (r=0.2). Females showed higher frequency of large fiber diameters (&gt;50 μm ) than males. However, there was no difference between body weight and sex (P =0.8). Our results suggest that muscle growth is by hypertrophy and hyperplasia due to a mosaic appearance from different diameters fibers, which is characteristic of large size fish species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200206
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20150149
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.14 n.2 2016
Fonte: | info:eu-repo/semantics/openAccess