Environmental analysis of fish introduced into the Philippines
2007
Casal, C.M.V.
There are 278 fish species (from 51 families and 171 genera) introduced to the Philippines since 1905, aquaculture (10.5 percent), ornamental (89.5 percent), mosquito control and fisheries (less than 1 percent). Several (14 percent) of these fish species have now been reported to occur in natural waters. Regulating the entry of probable invasive species is the most economical way of preventing the potential establishment of these species. Since, species characteristics determine their establishment potential, these can be used to provide a quantitative risk assessment protocol for the country. Analyses of the species which have been established in the country were found to have: come from a similar climate, higher degree of parental care, smaller with relatively shorter life spans, higher resilience and reported establishment elsewhere. The high incidence of species which have unknown establishment in the country also show similar characteristics implying either: 1. the species are already established however they have not been reported because of the paucity of available information or 2. they have the potential to establish in the very near future.
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