07 June 2019

Updates from Denmark

It’s rare for crayfish news to get a follow-up, but the first record of Marmorkrebs in Denmark has attracted more attention by doing what Marmorkrebs do: reproducing.

Danish Marmorkrebs in berry

With the help of a Google Translate and guesswork (“crayfish” seems to translate into a lot of weird English words), I think the article says (in part):

It was bad news for the Danish nature when a marbled crayfish was found in Karup Å near Skive in February. It was the first time that the marbled crayfish was found in Denmark.

In other countries, the crayfish has done a lot of damage to nature, as it can fertilize itself and eat almost everything on its way. So since then, it has been kept in captivity at Aqua Aquarium in Silkeborg. Now it has succeeded in cloning itself and thus getting six kids.

If it first gets hold of the watercourses in Denmark, it is completely hopeless to stop it again, says Morten Vissing, is a zoologist at Aqua Aquarium and Animal Park.

“You have seen many strange things, but this is one of the things that hit everything. After all, it is not an animal that exists naturally. You have taken some animals from nature, and you have bred in colors and sizes. Then one has reached a species where today only females exist, and they are then able to clone themselves. It’s incredibly mysterious,” says Morten Vissing.

The marbled crayfish is the only species of crab known to reproduce asexually.

Vissing seems to imply that Marmorkrebs were bred deliberately, which is probably not the case. And either Vissing or the newspaper should read about spinycheek crayfish, which can reproduce asexually.

Related posts

Nothing like a Dane: the European invasion continues

External links

Den uønskede marmorkrebs har klonet sig selv (The unwanted marbled crayfish has cloned itself)

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