Re: NANFA-L-- pimephales notatus

matt ashton (ashtonmj2003-in-yahoo.com)
Wed, 30 Nov 2005 12:29:57 -0800 (PST)

Isn't there a ton of info related to toxicology and bioassay on breeding them? The consultant I used to work for had a bioassay lab with a simple fish room and heavily bred them and this method is used alot of places. Once the conditions with light and temp wise were established and males became tubercled and blackened on their heads things just stared rolling. They were just kept-in-that condition and bred non stop. They used halved PVC pipes as spawning media and most spawning I observed took place underneath the pipes. The people in the lab really werent of the fish keeping type just chemists really they just had to maintain the set conditions to keep enough fish breeding.

I could put you into contact with one of them if you like but I think its an overall well practiced method that alot of bioassay labs use.

Peter Unmack <peter.lists at> wrote:
G'day folks

A while back I asked a few questions on Pimephales. I now have fatheads
breeding regularly in the lab. They actually are a pretty neat fish,
males go jet black with two broad white bands around their bodies.
Breeding is more like breeding a cichlid than a minnow. Easy to raise
too, just start them on baby brine shrimp. If anyone has any good
pictures of colored up males please let me know.

I have a bunch of P. notatus setup as well in a large tank. Water temp is
about 78, daylength is ~16 hours. I put in some tiles with small rocks
under them to provide potential spawning sites, but have seen no sign of
any activity. I was wondering if anyone had any suggestions on breeding
them? I never actually found any solid literature on how folks have
previously bred them.

Thanks
Peter Unmack
Lake Texoma
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