CRANKING UP ON KOI CARP

Posted 15 years ago    3 comments

When is a goldfish not a goldfish? When it's a nasty koi carp!

The Department of Conservation (DOC) is cranking up efforts around Northland to identify and get rid of these tough, persistent pest fish and it needs public help to do so.

Koi Carp
Koi Carp

Previous appeals for sightings of koi carp have had a great result, says DOC spokesperson Amy MacDonald, with summer being a critical time to help contain fish spread.

"Koi carp spawn in spring and summer with females producing several hundred thousand eggs. The carp are very robust and can survive out of the water for a long time if kept moist, so we need to keep a constant watch for them."

The carp are pests because they cause water quality degradation by mixing up sediment on the bottom of waterways; eat aquatic plants, insects and small fish, making waterways unsuitable for native fish and trout and are easily accidentally transferred as adults or eggs into new waterways. As prolific breeders their numbers build rapidly so they can readily "take over" new sites.

"We're asking anyone who thinks they've seen koi carp to contact DOC immediately so we can confirm the report and then decide on management options," says Ms MacDonald. "Whatever we propose to do is agreed with landowners first. The idea is to help landowners with water quality on their own properties as well as look after freshwater ecosystems in general."

DOC has already eradicated two koi carp populations from ponds on private land at Waipu and Houhora and is working towards a goal of either eradicating or containing remaining populations.

Koi carp resemble large goldfish except for two pairs of barbels or feelers at the corners of their mouth. Their colours vary, often with irregular blotches of black, red, gold, orange or pearly white and they can grow to about 75cm. The barbels are an obvious feature, which distinguish the carp from other species such as goldfish.

The mostly live in sluggish, often weedy streams and around the shallow areas of lakes and lagoons.

"A simple phone call or e-mail is all it takes and we can get someone out to a property very promptly," Ms MacDonald says. "Action isn't always possible but it's important to know where the carp are for a comprehensive management perspective."

To report koi carp phone 09 4703300 or e-mail northland@doc.govt.nz, putting the words "pest fish" in the subject line.

For more information call Amy MacDonald on 09 4703342 or Sioux Campbell 09 4703355.


Comments

brian hutchinson
12 years, 2 months ago
you people at doc need to concentrate on the real problems with the enviroment. lake forsythe in christchurch is in a terrible state, you cant let your dog swim there, never heard doc mention this. also the poisons you people use many are banned in other countrys. rotenone is linked to parkinsons disease.doc are loathed by most sports people mainly for the way they dont tackle the real issues
11 years, 3 months ago
Rupert Sanderson heels of this series can be described as unique, because the whole series is Rupert Sanderson high-heeled shoes specially named as "Hong Kong".
Ben Jeffery
11 years, 2 months ago
Pathetic!!! you people are such snobs. Carp are abundant all over the world and do not cause the type of ecological problem you are more than suggesting. Rainbow trout are a man made species that are most definitely not native to New Zealand and your fine with them being here. How very convenient! Just leave the fish alone and go get a life that doesnt involve the eradication of a species. Hitler!!!

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