View
Publication Type
Conference Proceedings
UWI Author(s)
Author, Analytic
Bennett, Kerri-Ann L.; Hyslop, Eric J.
Author Role
n/a
Author Affiliation
Department of Life Sciences
Paper/Section Title
A study of the taxonomy of gambusia spp. Poey 1854 in Jamaican rivers using molecular and morphological techniques [Abstract]
Medium Designator
n/a
Connective Phrase
n/a
Editor/Compiler
n/a
Editor/Compiler Role
n/a
Proceedings Title
Proceedings of the Sixth Conference, Faculty of Pure and Applied Sciences edited by Daniel Coore and Robert J.Lancashire.
Date of Meeting
n/a
Place of Meeting
n/a
Place of Publication
Kingston, Jamaica
Publisher Name
Faculty of Pure and Applied Sciences, University of the West Indies
Date of Publication
2003
Date of Copyright
n/a
Volume ID
n/a
Location in Work
64-65
Extent of Work
n/a
Packaging Method
n/a
Series Editor
n/a
Series Editor Role
n/a
Series Title
n/a
Series Volume ID
n/a
Location/URL
n/a
ISBN
n/a
Notes
n/a
Abstract
Fishes of the genus Gambusia belong to the family Poeciliidae which the most commonly occurring family of fishes in Jamaican freshwater. Fishes of the genus Gambusia inhabit waters of the Atlantic Drainage from the eastern and Southern United States south-ward into Middle America to northern Columbia and into the Greater Antilles east to Hispaniola and the Bahamas. There are 45 species present and the Antillean forma are closely related. In Jamaica, the fishes of the genus Gambusia are known by the common names “Ticki-Ticki” or “Belly-Brim”. The species of Gambusia known to be the endemic to the island are Gambusia wrayi Regan 1913, Gambusia melapleura Gosse1851, Gambusia oligosticta Regan 1913, and Gambusia Gracilior Regan1913. Gambusia puncticulata Poey 1854 and Gambusia holbrooki Girad 1859 are also presenting Jamaica but they are not endemic species. The majority of taxonomically useful structures are concentrated in the males; as males of different species show large structural contrast while the females show very little. The gonopodium, a modified anal fin in the male which is used for the introduction of male gametes into the female, is one of the most taxonomically significant structures within the genus(Chambers 1987). In previous study in which the diets of three species of poeciliid fishes were compared, several gonopodium structures were found to exist in the populations of Gambusia sampled in Rio Cobre which were believe to belong to the same species. The structure of the gonopodium is expected to be reasonably constant within the members of each species. The literature available also provides some what contrasting diagrams of the gonopodial structures for one of the endemic species G. oligosticta. This study seeks to determine using molecular and morphological methods if the difference observed in gonopodial structures in the populations of gambusia in the Rio Cobre are due to population or species differences. The primary molecular techniqueused in the study is the Random Amplified Polymorphic DNA (RAPD) technique. Fin ray formulae, lateral scale counts and asteological data are the morphological techniques used to aid in differentiation between the groups present. It is hoped that with these combination of methods it will be possible to clearly differentiate between the different groups present in the population.....
read more