Transient up- and down-regulation of expression of myosin light chain 2 and myostatin mRNA mark the changes from stratified hyperplasia to muscle fiber hypertrophy in larvae of gilthead sea bream (Sparus aurata L.)

Hyperplasia and hypertrophy are the two mechanisms by which muscle develops and grows. We study these two mechanisms, during the early development of white muscle in Sparus aurata, by means of histology and the expression of structural and regulatory genes. A clear stage of stratified hyperplasia was identified early in the development of gilthead sea bream but ceased by 35 dph when hypertrophy took over. Mosaic recruitment of new white fibers began as soon as 60 dph. The genes mlc2a and mlc2b were expressed at various levels during the main phases of hyperplasia and hypertrophy. The genes myog and mlc2a were significantly up-regulated during the intensive stratified formation of new fibers and their expression was significantly correlated. Expression of mstn1 and igf1 increased at 35 dph, appeared to regulate the hyperplasia-to-hypertrophy transition, and may have stimulated the expression of mlc2a, mlc2b and col1a1 at the onset of mosaic hyperplasia. The up-regulation of mstn1 at transitional phases in muscle development indicates a dual regulatory role of myostatin in fish larval muscle growth

Croissance et développement des larves de poissons

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Croissance des fibres musculaires chez les larves de carpe

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Growth of organs and tissues in carp (Cyprinus carpio L.) larvae

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Conséquences de l'apport énergétique alimentaire sur la constitution des réserves lipidiques et la croissance musculaire de la truite arc-en-ciel

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Metabolic differentiation of myotomal muscles in a teleost fish, the sea bass (Dicentrarchus labrax)

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Effet de l'énergie apportée dès le premier repas par les lipides alimentaires sur la croissance musculaire des alevins de truite arc-en-ciel

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Larval and crustacean nutrition. Concluding remarks

Larval and crustacean nutrition. Concluding remarks. 4. International Symposium Fish nutrition and feedin

The effects of compound diets feeding on growth and survival of coregonid larvae

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Biochemical characteristics of cholinesterases from bar tissues

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