Re: NANFA-- Rivulus marmoratus

Christopher Scharpf (
Mon, 03 May 2004 20:59:43 -0400

This is the NANFA e-mail-in-its finest. Someone asks a question, and gets a
learned answer -- and a mini-essay on rivuline information sources -- in

Thanks, Scott, for making us look good!

Chris Scharpf

> From: "Scott Davis" <>
> Reply-To:
> Date: Mon, 3 May 2004 12:00:13 -0500
> To: <>
> Subject: Re: NANFA-- Rivulus marmoratus
> I had good luck with them in salty water. However don't add many black worms
> to brackish water, those worms don't last long, but will fatally foul the
> water.
> A good site dedicated to them, compiled by Bruce Turner, is:
> TFH magazine, February 1998, ran an especially interesting article "Sex and
> the Single Killifish" by Kathleen Cole and David Noakes. I'll bet their
> article in Copeia 1997: 596-600 includes much the same information.
> They contend, as a result of their study, that most marmoratus start out as
> functional females. If they don't encounter a male with a certain period,
> they also develop testes and can lay self fertilizing eggs.
> In some populations males develop from the get-go. In other populations
> functional hermaphrodites will lose their ovaries and become "secondary
> males." There is a photo of a field caught male by Will Davis-in-that site
> listed above. They also discuss hermaphroditism in several other (marine)
> fishes.
> Several years ago Science Magazine ran a fascinating article on their
> habitat.
> Google will also yeeld up a bunch of stuff. Also see that Turner site for a
> biobliography.
> That TFH issue is available from the Jim Forshey's Aquatic Book Store
> . When I can't find aquarium literature anywhere
> else, I still have a pretty good chance of finding it there.
> If that doesn't work for you, e-mail me off list and I'll unwrap a copy and
> (later this week) try to scan that TFH article - for purely personal
> research purposes of course. :)
> All the best!
> Scott Davis
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