Premium
The Post‐larval Development of Lateral Musculature in Gilthead Sea Bream Sparus aurata (L.) and Sea Bass Dicentrarchus labrax (L.)
Author(s) -
RamírezZarzosa G.,
Gil F.,
Vázquez J. M.,
Arencibia A.,
Latorre R.,
LópezAlbors O.,
Ortega A.,
Moreno F.
Publication year - 1998
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.1998.tb00151.x
Subject(s) - sea bass , dicentrarchus , biology , serranidae , anatomy , juvenile , myosin , larva , ultrastructure , fishery , myotome , fish <actinopterygii> , embryogenesis , biochemistry , ecology , embryo , somite
Summary Fibre‐type differentiation of lateral musculature has been studied in gilthead sea bream Sparus aurata (L.) and sea bass Dicentrarchus labrax (L.) during post‐larval development using ultrastructural, histochemical and morphometric techniques. The study showed three muscle layers: red, intermediate (or pink) and white. Initially, most of the red muscle showed low myosin ATPase (m‐ATPase) activity fibres, whereas near the transverse septum some small high m‐ATPase activity fibres appeared and later acquired a rosette aspect. Afterwards, during adult growth the red muscle showed a histochemical mosaic appearance. The pink muscle in sea bass was observed at the beginning of juvenile development by the oxidative technique (NADH‐RT reaction) whereas in gilthead sea bream it was also observed at the end of larval development. The pink layer consists of high m‐ATPase activity fibres. However, along the muscle development other low and moderate m‐ATPase activity fibres were observed close to the red and white muscles, respectively. The white muscle of juvenile fish showed a histochemical mosaic appearance near the pink muscle. In adult specimens the mosaic white muscle spread out occupying the whole of the myotome. Morphometric analysis shows a significant increase in mean fibre diameter during post‐larval development, as shown by the Student's t‐test (hypertrophic growth). Skewness and kurtosis values of fibre diameters point to the generation of a new fibres from the myosatellite cells (hyperplastic growth).