Some Biological Aspects Of (Scolopsis Ghanam (Forskal) Perciformes: Scolo’psidae) In Zanzibar Channel

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Date
1982/1983
Authors
Nzioka R. M.
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Abstract
The biology of Scoiopsis ghanam (Forskal)(PerTformes: Scolopsidae) in the coastal waters of East Africa was studied in Zanzibar Channel from 1974 to 1977. The diet consisted of crustaceans(29.6 percent), molluscs (11.2 percent)echinoderms (9.5 percent) and fishes (4.5 percent). Sand (12.6 percent) and coral fragments (0.9 percent) in the digestive tract indicate,that this species also predates on bottom dwelling organisms. The length-weight relationship was found to be close to the cubic law of isometric growth. The spawning period of the species was found to be from September to January during the inter-monsoon period and N.E. monsoon,and the relative fecundity ranged between 12790 and 22810 with a mean of 16550. Sex ratio was 1 : 1 with slight variation during the spawning period when females were dominant.
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East African Agricultural And Forestry Journal, XLVIII (No 1-4), p. 69-73
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