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A study of the peripheral innervation and muscle fibre types of Ictalurus nebulosus (Lesueur) and Ictalurus punctatus (Rafinesque)
Author(s) -
Raso D. S.
Publication year - 1991
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.1095-8649.1991.tb04372.x
Subject(s) - ictalurus , biology , ictaluridae , anatomy , catfish , succinic dehydrogenase , white (mutation) , fish <actinopterygii> , muscle fibre , staining , biochemistry , fishery , enzyme , skeletal muscle , genetics , gene
The innervation pattern and fibre types of the axial musculature of two closely related catfish species with differing lifestyles, Ictalurus nebulosus (Lesueur) and I. punctatus (Rafinesque) were investigated. Both fish displayed the multiple innervation pattern in the red muscle. However, the white muscle of I. nebulosus demonstrated terminal innervation while I. puncrurus displayed multiply innervated white muscle fibres. Fibre typing utilizing histochemical techniques for glyco‐gen, lipid, succinic dehydrogenase and glucose‐6‐phosphate dehydrogenase revealed the typical teleostean distribution of red, intermediate and white muscle fibres in both fish. Staining was greatest in the red muscle fibres and least in the white muscle fibres. The white muscle fibres of I. punctatus stained slightly more for lipid than the white fibres of I. nebulosus which may be correlated with a greater aerobic capacity related to lifestyle and possibly innervation.