Relationship between respiratory area of gills and skeletal muscles in three species of fishes (Clupeiforms)

M.Abdul, Hashim; Kareem,

	Relationship between respiratory area of gills and skeletal muscles in three species of fishes (Clupeiforms)
Journal of Misan Researches
Article 1, Volume 3, Issue 6, 2007, Pages 177-219
Authors
Hashim M.Abdul;
Abstract
The present study deals with three species of Teleosti (Clupeiforms) : sbour (Tenualosa ilisha) ; jaffot(Nematalosa nasus) and Abu uwaina (Ilisha elongata). The gill surface area shows that the three species of fishes differ in gill area (mm2/gm). The sbour type has a larger gill area than the other two species .Also the study shows that there were semblance in the average of the proportions of red muscles fibers of these species of fish as far as histological features of lateral skeletal muscle are concerned. In addition to the increase of the average of the proportion of red muscles towards tail region (caudal peduncle) , which indicates that the importance of this region in the swimming mechanism of the three species. The study of the muscle fibers diameters of the mentioned species revealed that the average of red muscle fibers diameters were less than the average of the diameters of white muscle fibres in the length and the regions of body studied in each type . In addition to the decrease of the averages of the diameters of the two species of muscle fibers (red & white) in all regions . This decrease leads to increase in members of small diameter muscle fibers which indicates the importance of this region which collaborates with caudal fin to form the "main locomotory organ" .

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