Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52910#.VKyX0snQrzE Author(s)   Chacha John Mwita Affiliation(s) Department of Aquatic Sciences and Fisheries, College of Natural and Applied Sciences, University of Dar es Salaam, Dar es Salaam, Tanzania . ABSTRACT Six hundred and fifty-eight specimens of the Clariidae were collected from seven localities in the Lake Victoria basin and the Malagarasi wetland, Tanzania. A total of three hundred unadjusted morphometric measurements and meristic counts were analysed with the aim of assessing the adequacy of morphometric technique to delineate the clariid species occurring in theLake Victoriabasin. Results showed that morphometrics augmented by multivariate analysis (PCA, DCA and cluster analysis) amalgamated the clariid fishes into three groups, the   Clarias alluaudi / C. werneri ,   C. gariepinus / C. liocephalus   and Clariallabes petricola ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50902#.VE8Ky1fHRK0 Author(s)   Chacha John Mwita 1* Affiliation(s) 1 Department of Aquatic Science and Fisheries, University of Dar es Salaam, Dar es Salaam, Tanzania . ABSTRACT Quantitative variations in parasites were investigated with respect to sex and size of Clarias gariepinus , season and localities sampled. Parasitic infection in male and female fish was not significantly different; prevalence (Man-Whitney paired sample test, U = 135.5, p = 0.7697), mean intensity (U = 136, p = 0.7829). Based on Kruskal-Wallis test analysis, the prevalence and mean intensity of five parasite species varied significantly among the three ...