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vol-31LIGHT MICROSCOPE STUDY OF ONCORHYNCHUS KISUTCH
MUSCLE DEVELOPMENT
SAMAR RABAH
King Abdulaziz University
Key words: Oncorhynchus kisutch, white fibers, Red fibres.
ABSTRACT
Study of microscopic structural changes of red and white muscle of coho salmon,
Oncorhynchus kisutch, through different developmental stages and through transition from
parr to smolt revealed developmental variation in fibre size where white fibres were larger
than red ones. The increase in fibre area, characterizing all stages of development, was
associated with reduction in both fibre and capillary densities. In large fish the reduction in
red muscle capillary density was 10 fold lesser than that of white muscle.
