Subject: Re: NANFA-L-- Crappie Identification (was Crappie Feeding)
dlmcneely-in-lunet.edu
Date: Wed Dec 15 2004 - 14:05:56 CST
Counting the spines on the anal fin of a 1 or 2 cm long, live fish in an aquarium might be a little difficult. However, the dorsal fin position should be relatively easy to determine. On Lepomis sunfishes, the origin in near the head, or-in-least well in front of the midpoint of the fishes body. On the Pomoxis sunfishes (crappie) the dorsal fin origin is nearly half the body length back. Crappies have an "undershot" jaw -- the mandible (lower jaw) protrudes slightly in front of the premaxilla (tip of the upper jaw).If you're counting, crappies have no more than 8 dorsal spines, Lepomis sunfishes have 9. The dorsal fin in crappies has its greatest height-in-the margin between spinous dorsal and soft dorsal (the longest spine is the last one, the longest soft ray is the first one), so that the fin is four sided (one side being that along the body) in profile. Lepomis sunfishes have the third or fourth spine longest, so that the spinous dorsal is tallest several spines in front of
Oh, hell. Look-in-a picture. Any good state fish book has drawings and photographs.
David L. McNeely, Ph.D., Professor of Biology
Langston University; P.O. Box 1500
Langston, OK 73050; email: dlmcneely-in-lunet.edu
telephone: (405) 466-6025; fax: 405) 466-3307
home page http://www.lunet.edu/mcneely
"Where are we going?" "I don't know, are we there yet?"
----- Original Message -----
From: SHasloue-in-kdhe.state.ks.us
Date: Wednesday, December 15, 2004 1:17 pm
Subject: NANFA-L-- Crappie Identification (was Crappie Feeding)
>
>
>
>
> Can you count the number of spines in the anal fin? Most of the
> sunfish(Lepomis species, anyway) will have 3 spines (hardened,
> fused rays) in the
> front of the fin.
>
> Crappie (Pomoxis species) will have 5 or 6.
>
> Steve
> ______________________________________
> Steve Haslouer
> Topeka, KS 66612-1367
>
> email: shasloue-in-kdhe.state.ks.us
>
>
> Actually, white crappie may have, as you put it, "zebra stripes."
> So may
> several other species of sunfish.
>
> Dave
>
> David L. McNeely, Ph.D., Professor of Biology
> Langston University; P.O. Box 1500
> Langston, OK 73050; email: dlmcneely-in-lunet.edu
> telephone: (405) 466-6025; fax: 405) 466-3307
> home page http://www.lunet.edu/mcneely
>
> "Where are we going?" "I don't know, are we there yet?"
>
> ----- Original Message -----
> From: "Rose, Patrick PO" <PWRose-in-C2Cen.uscg.mil>
> the
> > larges one of them has started getting some color in him, although
> > it is
> > very faint he/she has little zebra strips starting-in-the top of
> > his back
> > and going down. I don't think that I saw anything that said that a
> > crappiewould have these even as babies.
>
>
>
>
> /------------------------------------------------------------------
> -----
> / This is the discussion list of the North American Native Fishes
> / Association (NANFA). Comments made on this list do not necessarily
> / reflect the beliefs or goals of NANFA. For more information
> about NANFA,
> / visit http://www.nanfa.org . Please make sure all posts to nanfa-
> l are
> / consistent with the guidelines as per
> / http://www.nanfa.org/archive/nanfa/guidelines.html. To subscribe,
> / unsubscribe, or get help, visit the NANFA email list home page and
> / archive-in-http://www.nanfa.org/archive/nanfa/.
>
>
/-----------------------------------------------------------------------
/ This is the discussion list of the North American Native Fishes
/ Association (NANFA). Comments made on this list do not necessarily
/ reflect the beliefs or goals of NANFA. For more information about NANFA,
/ visit http://www.nanfa.org . Please make sure all posts to nanfa-l are
/ consistent with the guidelines as per
/ http://www.nanfa.org/archive/nanfa/guidelines.html. To subscribe,
/ unsubscribe, or get help, visit the NANFA email list home page and
/ archive-in-http://www.nanfa.org/archive/nanfa/.
: Sat Jan 01 2005 - 12:41:57 CST