I am convinced that avoiding the introduction of exotic species is one of
the biggest challenges we4re facing to protect native species. The problem
is even worse in the USA as far as I understand. Whenever I come across an
exotic invader, it will be its last encounter ever.
In awareness of this I have my pond for NANF planned in a way none of the
fish can escape - its far away of any water.
----- Original Message -----
From: Jeremy Tiemann <jtiemann_at_inhs.uiuc.edu>
To: <nanfa_at_aquaria.net>
Sent: Monday, March 31, 2003 8:08 PM
Subject: NANFA-- NANFA - Black carp Part I & II
> FYI -
>
>
> Part I - VERY disturbing news that the first black carp in the wild
> has been captured
>
> >I have attached pictures of the black carp collected by commercial
> >fisherman, Jim Beasley. Jim caught the fish from Horseshoe Lake in
> >Alexander County, Illinois. The fish was 783 mm long and weighed
> >5.8Kg. Evidently everyone's fears regarding the escape of this
> >exotic are coming true, our native fishes and mussels should be
> >nervous.
> >
> >Rob Maher
>
> Attachment converted: Macintosh HD:blackcarp11.JPG (JPEG/JVWR) (0003A7F1)
> Content-Type: text/plain; charset="us-ascii"
>
>
>
> Part II - The follow-up
>
> Greg Connover (USFWS Marion office) made arrangements yesterday
> evening to have our black carp specimen tested to determine whether
> it is diploid or triploid. Paul Wills at Logan Hollow Fish Farm
> performed the test. Paul was able to succesfully extract a blood
> sample for testing. They first tested 3 known diploid grass carp and
> 3 known triploid grass carp, to determine a reference regarding
> nuclear diameter of the red blood cells and then tested a blood
> sample from the black carp. The nuclear diameter of the black carp
> sample was identical to that of the triploid grass carp. Greg then
> checked with Mike Freese (aquaculture specialist in AR) to see if the
> nuclear diameter of the RBC's were consistent between black and grass
> carp and according to Mr. Freese they are. Therefore, it would
> appear that the fish in question is most likely a triploid. Greg
> cautioned that these results are preliminary and that they going to
> take some additional tissue samples to try to confirm that this fish
> was a triploid. I'll keep everyone informed on any new developments.
>
> Rob Maher
> Illinois Department of Natural Resources
> Commercial Fishing Program
> 8450 Montclaire Avenue
> Brighton, IL 62012
> (618) 466-3451
>
> --
> Jeremy Tiemann
> Illinois Natural History Survey
> Center for Biodiversity
> 607 E. Peabody Dr.
> Champaign, IL 61820
> Phone: (217) 244-4594
> Fax: (217) 333-4949
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