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The pectoral spines of Synodontis schall (n = 813) were examined for 24 months. Mean length for the right (3.2 cm) and left (3.1 cm) pectoral spines were not significantly different [P > 0.05]. However, the male and female pectoral spine lengths were significantly different (P < 0.05). A fractured pectoral spine in one of the specimens was shorter than the… (More)