英國當局提出警告,經由水族業的貿易往來而傳到英國的外來種觀賞用螯蝦(ornamental crayfish)可能使本土的淡水螯蝦物種遭受到巨大的壓力。英國政府今天表示,一份新提出草擬政策用來對付這種侵入性的非本土物種受到英國公眾意見的強力支持,而最後政策將在2008年春季拍板定案。
這種擁有大理石斑紋的螯蝦在紀錄上是第一個擁有無性生殖能力的淡水螯蝦,其能夠快速繁衍,只要一隻就可以增生成一大群。
因為這種斑紋螯蝦可以如此快速的繁衍,水族生物的愛好者可以把過多的斑紋螯蝦傳給其他的水族同好、寵物店,或是把牠們丟到野外。
淡水螯蝦看起來像小型的龍蝦,生活在溪流、河流或是靜水水域當中。而斑紋螯蝦是一種很貪食的物種,如果把他們放逐到野外可能會對本土的水生植物或動物造成衝擊;此外,這種斑紋螯蝦身上帶有真菌可能會傷害本土的淡水螯蝦。
The arrival in the UK of a foreign ornamental crayfish species via the aquarium trade could put native crayfish species under severe pressure, British authorities warn. A new draft strategy to tackle such invasive non-native species in Great Britain has received strong support during public consultations, the government said today, and a final strategy will be introduced in the spring.
The marbled crayfish is the first recorded crayfish capable of asexual reproduction. It reproduces so rapidly that one animal alone can establish a breeding population.
Because the marbled crayfish can reproduce so fast, aquarium hobbyists could pass their excess animals on to other hobbyists, pet shops, or release them into the wild.
Freshwater crayfish look like miniature lobsters and live in streams, rivers and still waters. Marbled crayfish are voracious feeders and could impact native aquatic plants and animals if released to the wild. In addition, this species carries a fungus that could harm native crayfish.
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