In Alberta, schools of invasive goldfish, some as large as dinner plates, are causing serious concerns. The provincial government is warning about the significant threats to native ecosystems resulting from the presence of goldfish in various water bodies in the region.
According to Environment Minister Grant Hunter, goldfish do not belong in Alberta’s waters and should stay in aquariums. These goldfish have been found in over 100 locations across the province, with new locations being identified each year, as confirmed by aquatic invasive species specialist Nicole Kimmel.
Kimmel explained that the goldfish are not accidentally finding their way into waterways but are intentionally being released by people. They manage to survive and reproduce, posing a risk to the local environment. The “Don’t Let It Loose” campaign by the province aims to discourage the illegal release of species into waterways, with penalties of up to $100,000 and/or a year in prison.
Goldfish can introduce various risks to native aquatic ecosystems due to their adaptability and reproductive capabilities. They can consume a wide range of food and reproduce rapidly, unlike many native fish species. Additionally, they can survive harsh winters and produce a significant number of offspring in a short period.
The issue of invasive goldfish extends beyond Alberta, as they are considered global invaders. University of Toronto biology professor Nicholas Mandrak highlighted their ability to thrive in diverse environments, including extreme conditions. Storm-water management ponds serve as ideal breeding grounds for goldfish, leading to their rapid growth and spread.
Efforts are underway to control the spread of goldfish into the wild, with a need for effective management strategies. Mandrak emphasized the importance of preventing the illegal introduction of goldfish to avoid widespread negative impacts on native species.
The Alberta government urges residents to report sightings of goldfish and other invasive fish to the Aquatic Invasive Species Hotline. Anyone witnessing the intentional release of invasive species is encouraged to report it to the 24/7 Report A Poacher hotline for appropriate action.