Scientists at the Environment agency are afraid that the humble pet goldfish could force the native Crucian carp out of existence.
Goldfish that have escaped ponds in the floods and illegally released pets are to blame.
The agency research has shown that the goldfish are not only competing for food and space but are breeding with the English Crucian Carp. The resulting hybrids are causing further competitive problems.
The Crucian Carp has no problems thriving in the British Isles, but unfortunately the introduction of the goldfish has tipped the balance in favour of the goldfish. The Crucian’s are suffering from loss of habitat and introduced disease.
Research shows cause for major ecological concern because not only are the offspring capable of out-competing Crucian carp but they are also capable of reproducing and further interbreeding with pure stocks.
Phil Bolton of the Environment agency said: “We are developing a Crucian Carp conservation plan that will be available within the next few months and we have nearly completed a field guide that will give anglers and fisheries managers detailed information on identifying Crucian carp.
“This will enable accurate data to be drawn up showing the whereabouts of Crucian populations and will aid their long term protection.”
Information
- Goldfish are native to Asia – believed to have originated in northern China and Korea
- Goldfish were first introduced into the British Isles in the 17th Century
- Parent goldfish can give birth to non-gold offspring. These are thought to be a throwback to the goldfish’s wild ancestor and are mistaken for Crucian carp
- The Crucian carp is among the best freshwater fish for enduring pollution, low oxygen levels and cold. In extreme conditions it has been known to hibernate in mud while the water above it has frozen
- Goldfish grow quicker than Crucian’s
John
www.Valueaquatics.co.uk