Premium
The so‐called tonic muscle fibre type in cyprinid axial muscle: their morphology and response to endurance exercise training
Author(s) -
Sänger A. M.
Publication year - 1997
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1997.tb01944.x
Subject(s) - tonic (physiology) , myofibril , myosin , biology , muscle fibre , ultrastructure , anatomy , biophysics , endocrinology , skeletal muscle
The morphology and the effect of an endurance training programme on tonic muscle fibres were studied in chub Leuciscus cephalus , by means of histochemistry and immunohistochemistry, electronmicroscopy and morphometry/stereology. Location and distribution, SDH‐ and mATPase‐activity, reaction to an anti‐tonic myosin antibody and ultrastructural features of the fibre type were investigated. With regard to training conditions, fibre size was not significantly affected. However, an increase in the volume densities of mitochondria, lipid and myofibrils can be observed, suggesting a training influence on the aerobic capacity of the so‐called tonic muscle fibres. Based on the quantitative findings, the fine structure and the response to training, similarities with intermediate muscle fibres and the functional role of these so‐called tonic muscle fibres are discussed.