Start Submission Become a Reviewer

Reading: Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka

Download

A- A+
dyslexia friendly

Research Articles

Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka

Authors:

S.P. Samaradivakara ,

Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, LK
X close

N.Y. Hirimuthugoda,

Faculty of Agriculture, University of Ruhuna, LK
X close

R.H.A.N.M. Gunawardana,

Faculty of Agriculture, University of Ruhuna, LK
X close

R.J. Illeperuma,

Genetech Research Institute, 54, Kitulwatte Road, Colombo, LK
X close

N.D. Fernandopulle,

Genetech Research Institute, 54, Kitulwatte Road, Colombo, LK
X close

A.D. De Silva,

Genetech Research Institute, 54, Kitulwatte Road, Colombo, LK
X close

P.A.B.D. Alexandra

Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, LK
X close

Abstract

Morphological variation among three populations of introduced Tilapia fish collected from Kurunegala, Anuradhapura and Polonnaruwa and the brood stock of Nile tilapia (Oreochromis niloticus) collected from the Udawalawe tilapia breeding centre was investigated by multivariate analysis of twenty morphometric and fourteen meristic characters. Discriminant analysis and cluster analysis of conventional morphometric measures showed a high divergence among the populations while the conventional meristic measures did not show a divergence among the populations. These results showed that the tested fish samples could be grouped into its respective collection site based on the morphometric characters. The morphometric differences between the populations may have appeared due to either genetic differences or environmental factors. The thirty-four characters, extracted from stepwise discriminant analysis played important roles in morphological differentiation.

Tropical Agricultural Research Vol. 23 (2): 105 – 116 (2012)

How to Cite: Samaradivakara, S.P. et al., (2015). Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka. Tropical Agricultural Research. 24(2), pp.105–116. DOI: http://doi.org/10.4038/tar.v24i2.7996
Published on 07 Jun 2015.
Peer Reviewed

Downloads

  • PDF (EN)

    comments powered by Disqus