How is the establishment status of the Wels catfish within the British Isles described?
Answer
No, they were introduced to specific gravel pits and reservoirs
Although the Wels catfish is a major feature in certain UK waters, the text clearly indicates that they are not indigenous to the British Isles. Their presence there is the result of intentional introduction by humans. These established populations are frequently found concentrated in man-made environments such as specific gravel pits or reservoirs, rather than being part of the natural, historical distribution that covers much of Continental Europe and Western Asia.
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