The biology of the bluespeckled parrotfish leptoscarus vaigiensis (family : scaridae) occurring along the coast of tanzania.

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dc.contributor.authorRubindamayugi, Mugassa Stephen Thomas
dc.date.accessioned2020-07-23T14:23:56Z
dc.date.available2020-07-23T14:23:56Z
dc.date.issued1983
dc.descriptionAvailable in print form, East Africana Collection, Dr. Wilbert Chagula Library, Class mark ( THS EAF QL638.S3R8)en_US
dc.description.abstractThe biology and the fishery potential of the parrotflsh Leptoscarus valcylensls (Quoy and aimard) has boon Investigated. villainess was found to feed exclusively on saagrasses and the epiphytic algae growing on them. Fish of all sizes feed on the same food. Attempts were made to investigate the agĀ© and growth rates of these fish using length frequency distribution curves. Because of the nature of the population of the fish studied it was not possible to establish the age structure and growth rate of this species. The relationship between body length and weight for separate and combined sexes has been determined. There was no significant difference in the regression lines between the sexes and therefore a combined equation of Log W * -4.476 + 3.11S log L. was preferred. The variation in condition factor with increasing length and change in breeding cycle of the fish have been investigated. The sex ratio of males to females was found to be 1:1.21 suggesting that there are slightly more females than maJ.es in the population. Males apparently mature at a smaller size than females. This fish breeds throughout the year but with the main spawning period extending from April to September, with peak in June/July, Ova-diameter frequency distributions indicated that L. vaigiensis has one spawning season, of long duration. Fecundity was assessed, but no relationship was established between fecundity and body length or weight. Catch statistics from several landing stations showed that parrotfishes form a large percentage (approximately 1%) of the marine fish caught from inshore waters. Of the parrotfishes caught in the area, L. vaigiensis is the most important species exploited. The fishing methods employed in parrotfish fishery have been discussed. Finally, recommendations on conservation of this species have been given.en_US
dc.identifier.citationRubindamayugi, M S T (1983), The biology of the bluespeckled parrotfish leptoscarus vaigiensis (family : scaridae) occurring along the coast of Tanzania, Master dissertation, University of Dar es Salaam. Dar es Salaamen_US
dc.identifier.urihttp://41.86.178.5:8080/xmlui/handle/123456789/13195
dc.language.isoenen_US
dc.publisherUniversity of Dar es Salaamen_US
dc.subjectParrotfishes (Zoology)en_US
dc.subjectAfrica, Easten_US
dc.subjectScaridaeen_US
dc.titleThe biology of the bluespeckled parrotfish leptoscarus vaigiensis (family : scaridae) occurring along the coast of tanzania.en_US
dc.typeThesisen_US

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