Dietary protein content influences both growth and size distribution of anterior and posterior muscle fibres in juveniles of Pagellus bogaraveo (Brunnich)
| Autor: | M. H. Galante, Eduardo Rocha, Luisa M.P. Valente, R. A. F. Monteiro, Carlos Andrade, Paula Silva |
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| Přispěvatelé: | Instituto de Ciências Biomédicas Abel Salazar |
| Rok vydání: | 2009 |
| Předmět: |
Physiology
Muscle Fibers Skeletal Pagellus Ciências biológicas Muscle Development Body weight Biochemistry Muscle hypertrophy Animal science Animals Body Size Muscle fibre Biological sciences [Natural sciences] biology Cell Biology Anatomy biology.organism_classification Perciformes Biological sciences Muscle Fibers Slow-Twitch Dietary protein Fish weight Muscle Fibers Fast-Twitch Content (measure theory) Muscle hyperplasia Animal Nutritional Physiological Phenomena Dietary Proteins Ciências biológicas [Ciências exactas e naturais] |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 1573-2657 0142-4319 |
| DOI: | 10.1007/s10974-009-9167-z |
| Popis: | 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 $$ (\bar{a}), $$ 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 $$ \bar{a} $$ 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 $$ \bar{a} $$ of posterior red fibres were the consistent differences found—a fact, to our knowledge, so far unreported for fish. |
| Databáze: | OpenAIRE |
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