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Author(s): Silva, P
Valente, LMP
Galante, MH
Andrade, CAP
Monteiro, RAF
Rocha, E
Title: Dietary protein content influences both growth and size distribution of anterior and posterior muscle fibres in juveniles of Pagellus bogaraveo (Brunnich)
Issue Date: 2009
Abstract: Muscle cellularity was studied in Pagellus bogaraveo juveniles fed on diets with different protein contents. Measured in transversal body sections, at both post-opercular and post-anal locations, the morphometric variables estimated were: total muscle area (A), total number of fibres (N), number of fibres per unit area of muscle (N(A)) and cross-sectional fibre area ((a) over bar), of the two main muscle fibre types. At the end of the experiment fish fed on diets having more than 40% of protein displayed significantly higher body weight. Fish fed on protein-rich diets exhibited greater (a) over bar and N. For fish fed on 30 and 50% protein diets the morphometric parameters measured grew linearly with the fish weight. High-protein diets favoured muscle hyperplasia. When comparing rostral and caudal locations, a greater N and a smaller (a) over bar of posterior red fibres were the consistent differences found-a fact, to our knowledge, so far unreported for fish.
Subject: Ciências biológicas
Biological sciences
Scientific areas: Ciências exactas e naturais::Ciências biológicas
Natural sciences::Biological sciences
Document Type: Artigo em Revista Científica Internacional
Rights: openAccess
Appears in Collections:ICBAS - Artigo em Revista Científica Internacional

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