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International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

DEVINCENTI, Clelia Viviana et al. Preliminary Study of the Sonic Muscle of Micropogonias furnieri (Actinopterygii, Sciaenidae): Morfología e HistoquímicaMorphology and Histochemistry. Int. J. Morphol. [online]. 2012, vol.30, n.4, pp.1442-1448. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022012000400027.

The present study highlights the morphology of the Micropogonias furnieri sonic muscle by means of histochemical techniques, relating it to previous histochemical studies of the pectoral fin and myotomal muscles. In order to classify the muscle fibres, succinic dehydrogenase (SDH) for mitochondria, periodic acid Schiff (PAS) for glycogen, Sudan Black and Red for lipids and myosin adenosine triphosphatase (m-ATPase) pre-incubated at alkaline and acid pHs to visualize the contraction velocity, were used. The sonic fibres were smaller than the white myotomal and pectoral fibres, showed homogenous size and distribution and had features common to white fibres: negative to SDH and lipids, weakly positive to PAS and m-ATPase following acid pre-incubation, and positive to m-ATPase at alkaline pre-incubation. The morphology of the sonic muscle of M. furnieri showed no differences between sexes, probably due to the fact that the individuals were at the post spawning maturity stage. This similarity would indicate a similar sound production in both sexes, related to the "disturbance calls" of this species.

Keywords : Sonic muscle; Micropogonias furnieri; Morphology; Histochemistry.

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