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Fish: Grass Carp (exotic)

Find, identify & discuss the marine species of SANParks
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joekin
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Fish: Grass Carp (exotic)

Unread postby joekin » Mon Sep 28, 2009 3:18 pm

Anyone know if grass carp(Ctenopharyngodon idella) have been spotted in Kruger yet? Read Here

I know there were introduced here into Florida Lake to control the water grass which at one stage was a big problem, but now seem out of control, also heard of them now being caught in the vaal(river and dam) Klipdrift dam, wemmer pan, if they are in the vaal it should be safe to say that they are also found in bloemhof dam.

if they aren't in kruger yet, they most probably will be soon/

would sanparks take action against something like this?

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Re: Grass Carp

Unread postby Rooies » Mon Sep 28, 2009 3:46 pm

There was a problem with grass in the water in Bloemhof dam. When you reeled in your hook and sinker, it was always covered with heaps of grass. Then the grass carp appeared and the grass disappeared. It looks like nature has sorted itself out because I have not caught any grass carp in 3 years.

I don't think they will survive in Kruger. Too many predatory fish and crocs. Grass carp is also slow and not a good fighter.
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Re: Grass Carp

Unread postby DOGMAD » Mon Sep 28, 2009 4:23 pm

Plenty of Grass carp in the Vaal dam,about all you catch now :wall:
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Re: Grass Carp

Unread postby joekin » Mon Sep 28, 2009 4:25 pm

but they are rapid growers.

look at carps and barbel, they also exotic fish, and look how they have flourished.

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Re: Grass Carp

Unread postby joekin » Mon Sep 28, 2009 4:28 pm

DOGMAD wrote:Plenty of Grass carp in the Vaal dam,about all you catch now :wall:



you keep em or toss em back??

theres this trout farm in fourways that also stocks carp barbel and bass. they started having such a problem with canary kurpers that they asked us to catch them and use em for barbel bait or even while we bored catch em on a landline and kill them

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Re: Grass Carp

Unread postby DOGMAD » Mon Sep 28, 2009 4:38 pm

joekin

We use for barbel bait and throw back,we have however been asked not to throw back muddies
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Re: Grass Carp

Unread postby joekin » Mon Sep 28, 2009 5:04 pm

on the bigfishsafari forum they mention not use muddies or yellow rather use carp or barbel, trying to minimize the effect on the indigenous fish species.

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Re: Grass Carp

Unread postby Tom124 » Tue Sep 29, 2009 8:11 pm

Recently the Environment Agency in Britain have sent several hundred mirror and common carp to African countries, for sport and, in some areas, food. Also, extensive wild stocking of brown, rainbow, brook and triploid trout is planned, especially in Botswana. :D
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Re: Grass Carp

Unread postby Rooies » Wed Sep 30, 2009 8:40 am

Trout in Botswana? :shock But it would be nice to do some fly fishing at Nossob. :D
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Re: Grass Carp

Unread postby gmlsmit » Sun Nov 01, 2009 5:53 pm

Grass Carp are now caught all over in the Vaal River system.

They are rapid growers and very rapid breeders.

Fish in excess of 3 kg. mass are not uncommon.

They are exotics and should be removed from the site when caught.
The first grass carp were introduced to control the growth of water grass, they were thought to be sterile, therefore they would not breed in our waters.

They have found our systems suitable and now are becoming a threat to the indigenous species i.e Yellow Fish, even the numbers of Mudfish seem to be declining, possibly also due to pollution which in turn does not seem to harm the Grass Carp, they seem to flourish in the current conditions.
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Re: Grass Carp

Unread postby joekin » Sun Nov 22, 2009 6:50 pm

I noticed that, fishing the vaal in September used to catch many mud fish, but nothing recently. i did however catch many small yellows


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