Distributions of a Natural Coloniser and an Established Exotic Fish Species: Gephyrocharax valencia (Characiformes: Characidae) and Trichogaster trichopterus (Perciformes: Osphronemidae) in Trinidad.

Ryan S. Mohammed, Rakesh Bhukal, Kerresha Khan

Abstract


The freshwater ichthyofaunal assemblage of Trinidad is dynamic, and our understanding of it is affected by changes in taxonomy and new findings. Phillip and Ramnarine (2001) listed 41 species of freshwater fish within Trinidad and Tobago, with no species unique to Tobago. Since then there have been three additions to the freshwater fish checklist, bringing the species richness up to 44. These three additions were the Three spot gourami, Trichogaster trichopterus, at one site in the Oropouche Drainage (Mohammed et al. 2010), the Driftwood catfish, Trachelyopterus galeatus, in the Caroni and Guayamare Rivers (Mohammed and Lalla 2013), and the characin, Gephyrocharax valencia, localised in the Moriquite and Moruga Rivers (Vanegas and Phillip 2013). The three species we examined here were chosen because they are the most recent additions to the fish assemblage and because they are important as a result of their potential ecological impacts.


Full Text:

PDF

References


Daniels, R.J.R. 2006. Introduced fishes: a potential threat to the native freshwater fishes of peninsular India. Journal of the Bombay Natural History Society, 103(2 & 3): 346-348.

Daniels, R.J.R. and Rajagopal, B. 2004. Fishes of Chembarampakkam Lake - a wetland in the outskirts of Chennai. Zoos’Print Journal, 19(5): 1481-1483.

Kenny, J.S. 1995. Views From the Bridge: a Memoir on the Freshwater Fishes of Trinidad. Trinprint Ltd., Barataria, Trinidad and Tobago. 98 p.

Knight, J.M. 2010. Invasive ornamental fish: a potential threat to aquatic biodiversity in peninsular India. Journal of Threatened Taxa, 2(2): 700-704.

Krishnakumar, K., Raghavan, R., Prasad, G., Bijukumar, A., Sekharan, M., Pereira, B. and Ali, A. 2009. When pets become pests - exotic aquarium fishes and biological invasions in Kerala, India. Current Science, 97: 474-476.

Liao, L.C. and Liu, H.C. 1989. Exotic aquatic species in Taiwan. p. 101-118. In S.S. de Silva, ed. Exotic Aquatic Organisms in Asia. Asian Fisheries Society, Manila, Philippines, Special Publication 3. 154 p.

Mohammed, R.S. and Lalla, H. 2013. Return of the driftwood catfish, Trachelyopterus galeatus (Family: Auchenipteridae). Living World, Journal of The Trinidad and Tobago Field Naturalists’ Club, 2013: 73-74.

Mohammed, R.S., Ramjohn, C., Lucas, F. and Rostant, W.G. 2010. Additional observations on the distribution of some freshwater fish of Trinidad and the record of an exotic. Living World, Journal of The Trinidad and Tobago Field Naturalists’ Club, 2010: 43-53.

Phillip, D.A.T., and Ramnarine, I.W. 2001. An Illustrated Guide to the Freshwater Fishes of Trinidad and Tobago. Joint publication, Darwin Initiative for the Survival of Species, UK, and University of the West Indies, Trinidad. 79 p.

Phillip, D.A.T; Taphorn, D.C., Holm, E., Gilliam, J.F., Lam- phere, B.A. and López-Fernandez, H. 2013. Annotated list and key to the stream fishes of Trinidad and Tobago. Zootaxa, 3711(1): 1-64.

Vanegas-Rios, J.A. and Phillip, D.A.T. 2013. First record of Gephyrocharax valencia (Characiformes: Characidae: Stevardiinae) on the island of Trinidad, West Indies. Revista Mexicana de Biodiversidad, 84(4): 1329-1334.

Ward, A.J., Axford, S. and Krause, J. 2002. Mixed-species shoaling in fish: the sensory mechanisms and costs of shoal choice. Behavioral Ecology and Sociobiology, 52(3): 182-187.


Refbacks

  • There are currently no refbacks.