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Invasive Fish Threatens Philippine Lake Biodiversity
17 Jul
Summary
- Escaped flowerhorn cichlids are now integrated into a Philippine lake's ecosystem.
- These invasive fish are outcompeting native species for resources.
- Concerns exist about potential human health risks from parasites.
Escaped ornamental flowerhorn cichlids have become an invasive species in Lake Sampaloc, Philippines, raising concerns about biodiversity loss. These hybrid fish, bred for their appearance, are believed to have entered the lake from breeding facilities after a typhoon.
Scientists observe that flowerhorns are being incorporated into the existing aquaculture system and are thriving in the eutrophic, polluted waters of the 104-hectare lake. This thriving invasive population directly competes with native species, such as the silver perch (ayungin), which has become increasingly rare and is now classified as endangered.
Further concerns involve potential health risks. While not yet found in Lake Sampaloc's flowerhorns, some captive specimens carry a roundworm capable of infecting humans. Researchers advise against promoting the fish for consumption due to these risks and emphasize that the release of species outside their natural ranges is a significant global issue.
To mitigate the problem, researchers propose solutions like stronger aquaculture infrastructure, routine inspections, and community monitoring. Harvesting invasive fish for aquafeed is also suggested, contingent on pathogen and contaminant screening.
