Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka
<p>Morphological variation among three populations of introduced Tilapia fish collected from Kurunegala, Anuradhapura and Polonnaruwa and the brood stock of Nile tilapia (<em>Oreochromis niloticus</em>) collected from the Udawalawe tilapia breeding centre was investigated by multiv...
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Postgraduate Institute of Agriculture, University of Peradeniya
2012-09-01
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doaj-1a22a0db20f242a3a19ae5decf0242322020-11-25T01:34:20ZengPostgraduate Institute of Agriculture, University of PeradeniyaTropical Agricultural Research1016-14222012-09-0123210511610.4038/tar.v23i2.46423770Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri LankaSP Samaradivakara0NY Hirimuthugoda1RHANM Gunawardana2RJ Illeperuma3ND Fernandopulle4AD De Silva5PABD Alexander6Faculty of Veterinary Medicine and Animal Science, University of PeradeniyaFaculty of Agriculture, University of Ruhuna,Faculty of Agriculture, University of Ruhuna,Genetech Research Institute, 54, Kitulwatte Road, Colombo 08,Genetech Research Institute, 54, Kitulwatte Road, Colombo 08,Genetech Research Institute, 54, Kitulwatte Road, Colombo 08,Faculty of Veterinary Medicine and Animal Science, University of Peradeniya,<p>Morphological variation among three populations of introduced Tilapia fish collected from Kurunegala, Anuradhapura and Polonnaruwa and the brood stock of Nile tilapia (<em>Oreochromis niloticus</em>) 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.</p> <p><em>Tropical Agricultural Research Vol. 23 (2): 105-116 (2012)</em></p> DOI: <span style="text-decoration: underline;"><a href="http://dx.doi.org/10.4038/tar.v23i2.4642">http://dx.doi.org/10.4038/tar.v23i2.4642</a></span><p> </p>https://tar.sljol.info/articles/4642meristicsmorphometricsoreochromis niloticus |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
SP Samaradivakara NY Hirimuthugoda RHANM Gunawardana RJ Illeperuma ND Fernandopulle AD De Silva PABD Alexander |
spellingShingle |
SP Samaradivakara NY Hirimuthugoda RHANM Gunawardana RJ Illeperuma ND Fernandopulle AD De Silva PABD Alexander Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka Tropical Agricultural Research meristics morphometrics oreochromis niloticus |
author_facet |
SP Samaradivakara NY Hirimuthugoda RHANM Gunawardana RJ Illeperuma ND Fernandopulle AD De Silva PABD Alexander |
author_sort |
SP Samaradivakara |
title |
Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka |
title_short |
Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka |
title_full |
Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka |
title_fullStr |
Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka |
title_full_unstemmed |
Morphological Variation of Four Tilapia Populations in Selected Reservoirs in Sri Lanka |
title_sort |
morphological variation of four tilapia populations in selected reservoirs in sri lanka |
publisher |
Postgraduate Institute of Agriculture, University of Peradeniya |
series |
Tropical Agricultural Research |
issn |
1016-1422 |
publishDate |
2012-09-01 |
description |
<p>Morphological variation among three populations of introduced Tilapia fish collected from Kurunegala, Anuradhapura and Polonnaruwa and the brood stock of Nile tilapia (<em>Oreochromis niloticus</em>) 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.</p> <p><em>Tropical Agricultural Research Vol. 23 (2): 105-116 (2012)</em></p> DOI: <span style="text-decoration: underline;"><a href="http://dx.doi.org/10.4038/tar.v23i2.4642">http://dx.doi.org/10.4038/tar.v23i2.4642</a></span><p> </p> |
topic |
meristics morphometrics oreochromis niloticus |
url |
https://tar.sljol.info/articles/4642 |
work_keys_str_mv |
AT spsamaradivakara morphologicalvariationoffourtilapiapopulationsinselectedreservoirsinsrilanka AT nyhirimuthugoda morphologicalvariationoffourtilapiapopulationsinselectedreservoirsinsrilanka AT rhanmgunawardana morphologicalvariationoffourtilapiapopulationsinselectedreservoirsinsrilanka AT rjilleperuma morphologicalvariationoffourtilapiapopulationsinselectedreservoirsinsrilanka AT ndfernandopulle morphologicalvariationoffourtilapiapopulationsinselectedreservoirsinsrilanka AT addesilva morphologicalvariationoffourtilapiapopulationsinselectedreservoirsinsrilanka AT pabdalexander morphologicalvariationoffourtilapiapopulationsinselectedreservoirsinsrilanka |
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1725072947798867968 |