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Invasion Risks of Aquarium Fish Trade to the Natural Environment in Sri Lanka

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dc.contributor.author Epa, Udaya Priyantha Kankanamge
dc.contributor.author Piyathissa, Madalusse Gedara Maheshika Udayangani
dc.contributor.author Ranasinghe, Sangasinghe Devage Achila Eshani
dc.contributor.author Ranasinghe, Yahani Gayara
dc.contributor.author Rathnayaka, Rathnayaka Mudiyanselage Kalhari Harsha
dc.date.accessioned 2023-11-20T04:17:22Z
dc.date.available 2023-11-20T04:17:22Z
dc.date.issued 2023
dc.identifier.citation Epa Udaya Priyantha Kankanamge; Piyathissa Madalusse Gedara Maheshika Udayangani; Ranasinghe Sangasinghe Devage Achila Eshani; Ranasinghe Yahani Gayara; Rathnayaka Rathnayaka Mudiyanselage Kalhari Harsha (2023). Invasion Risks of Aquarium Fish Trade to the Natural Environment in Sri Lanka, journal of fisheries and environment 2023, volume 47, Department of Zoology and Environmental Management, University of Kelaniya, Kelaniya, Sri Lanka en_US
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/27049
dc.description.abstract Sri Lanka, one of the world’s biological hotspots, exports wild-caught and farm-bred aquarium fish species to more than 70 countries. This study evaluated the potential for invasiveness of aquarium fish species now raised and traded in Sri Lanka's Gampaha, Kandy, and Polonnaruwa districts. A questionnaire survey of 40 hobbyists, 20 retailers and ten breeders of aquarium fish in each selected district was conducted to assess the causes of aquarium fish releases. The invasion potential was evaluated using a model consisting of species thermal tolerance, propagule pressure and invasion history. Overall, 59 non-native fish species belonging to 14 families (Acanthuridae, Callichthyidae, Characidae, Cichlidae, Cyprinidae, Helostomatidae, Loricariidae, Notopteridae, Pimelodidae, Poeciliidae, Osphronemidae, Osteoglossidae, Salmonidae, and Scombridae) were recorded from the aquarium trade in the country. Out of 17 species with high to moderate invasive potential, six have already been established in the environment in Sri Lanka. Therefore, Astronotus ocellatus, Barbonymus schwanenfeldii, Carassius auratus, Hypostomus plecostomus, Pangasianodon hypophthalmus, Poecilia latipinna, P. sphenops, Puntigrus tetrazona, Trichopodus microlepis, Xiphophorus helleri, and X. maculatus are identified as potential invaders in Sri Lanka. The reasons for the intentional release of aquarium fish into the environment were excessively large size, aggressiveness, diseases and high reproductive rates. The number of fish of each species released into the natural environment is positively correlated to the number kept in home aquaria. A well-coordinated institutional mechanism to control unwanted fish introductions through the aquarium fish trade in Sri Lanka is urgently needed. en_US
dc.publisher Department of Zoology and Environmental Management, University of Kelaniya, Kelaniya, Sri Lanka en_US
dc.subject Introduction, Invasive, Non-native, Propagule pressure en_US
dc.title Invasion Risks of Aquarium Fish Trade to the Natural Environment in Sri Lanka en_US


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