The pattern of morphological differentiation among wild and cultured Clarias gariepinus from six
populations collected in Osun, Owena and Oluwa River (wild) and Akure, Ilesa and Ado-Ekiti (cultured)
were examined using morphometrics and meristics index. The first principal component (PC1) accounted
for 68% of the total variance in the sampled populations. The second and third and fourth PCs accounted
for 14%, 8% and 5% of the total variation respectively. The PC loading analysis revealed that TL and SL
accounted for the 68% variation observed in PC1. The loading on PC4 revealed pectoral fin rays and pelvic
fin rays to have contributed to 5% variation between populations of C.gariepinus.
The first and fourth principal components showed that the observed differences were mainly from total and
standard length for morphometric measurements and pelvic and pectoral fin rays of fish, indicating this
region to be important in the description of population characteristics. Canonical variate analysis (CVA)
plot shows overlapping of clusters of specimens for some of the locations studied.
The study revealed morphological differentiation between wild and cultured C. gariepinus from
populations.
Keywords: clariidae, canonical variate, principal component, morphometric, meristic
PAPER TITLE :THE MORPHOLOGICAL VARIATION IN CULTURED AND WILD POPULATIONS OF CLARIAS GARIEPINUS IN SOUTH WEST NIGERIA
FUTA JOURNAL OF RESEARCH IN SCIENCE | VOLUME 10 NUMBER 2 2014
Paper Details
- Author(s) : 1*O.M. Popoola, 1E.A. Fasakin and 2J.I. Awopetu
- Abstract:
