[NatureNS] re:mystery fish

From: "Bernard Burke" <blburke@ns.sympatico.ca>
To: "nature ns" <naturens@chebucto.ns.ca>
Date: Sat, 2 Aug 2008 07:34:11 -0300
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Return-Path: <naturens-mml-owner@chebucto.ns.ca>
Original-Recipient: rfc822;"| (cd /csuite/info/Environment/FNSN/MList; /csuite/lib/arch2html)"

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Randy Lauff wrote:

In reality, the teeth on the fish in Rita's pictures are pretty typical =
for fish, that is somewhat conical and often curved or bent back. The =
conical shape for teeth is an adaption to eating slippery stuff =
(typically other fish), and we see that style of tooth (with some =
modification) in other fish eaters like alligators and some of the =
toothed whales. Mergansers have similar adaptions, though they don't =
have teeth, but extensions of the bill that form a similar shape.=20

The backwards bend to the teeth in the photo is reminiscent of snake =
teeth - in both cases, prey that struggles and frees itself from the =
teeth can only do so by moving farther back into the mouth.

You've made some good points Randy, and the teeth are rather subdued =
compared with the Wolfish links you have supplied.
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Andrew Hebda wrote:

They are somewhat similar to that of one of the Anglerfishes, but bot a =
complete fit.  Have forwarded the images to Dr Alfonso Rojo, retired =
ichthyologists specialising in fish skeletons and will pass on his =
opinion when available.

Andrew

A Hebda
Nova Scotia Museum

Definately sounds like the best source for proper identification. Thanks =
for forwarding the info Andrew, and we are looking forward to his =
opinion.

Bernard Burke
blburke@ns.sympatico.ca
Dartmouth

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<DIV><FONT face=3DArial><FONT size=3D2>Randy Lauff =
wrote:</FONT></FONT></DIV>
<DIV><FONT face=3DArial><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2><STRONG>In reality, the teeth on the fish in Rita's =
pictures=20
are pretty typical for fish, that is somewhat conical and =
often&nbsp;curved or=20
bent back. The conical shape for teeth is an adaption to eating slippery =
stuff=20
(typically other fish), and we see that style of tooth (with some =
modification)=20
in other fish eaters like alligators and some of the toothed whales. =
Mergansers=20
have similar adaptions, though they don't have teeth, but extensions of =
the bill=20
that form a similar shape. </STRONG></FONT></DIV>
<DIV><FONT size=3D2><STRONG></STRONG></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2><STRONG>The backwards bend to the teeth in the =
photo&nbsp;is=20
reminiscent of snake teeth - in both cases, prey that struggles and =
frees itself=20
from the teeth can only do so by moving farther back into the=20
mouth.</STRONG></FONT></DIV>
<DIV><STRONG><FONT size=3D2></FONT></STRONG>&nbsp;</DIV>
<DIV><FONT size=3D2>You've made some good points Randy, and the teeth =
<EM>are</EM>=20
rather subdued compared with the Wolfish links you have =
supplied.</FONT></DIV>
<DIV><FONT=20
size=3D2>----------------------------------------------------------------=
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-------------------------------------------------</FONT></DIV>
<DIV><FONT size=3D2>Andrew Hebda wrote:</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2><STRONG>They are somewhat similar to that of one of =
the=20
Anglerfishes, but bot a complete fit.&nbsp; Have forwarded the images to =
Dr=20
Alfonso Rojo, retired ichthyologists specialising in fish skeletons and =
will=20
pass on his opinion when available.<BR><BR>Andrew<BR><BR>A Hebda<BR>Nova =
Scotia=20
Museum</STRONG></FONT></DIV>
<DIV><STRONG><FONT size=3D2></FONT></STRONG>&nbsp;</DIV>
<DIV><FONT size=3D2>Definately sounds like the best source =
for&nbsp;proper=20
identification.&nbsp;Thanks for forwarding the info Andrew, and&nbsp;we=20
are&nbsp;looking forward to his opinion.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Bernard Burke</FONT></DIV>
<DIV><FONT size=3D2><A=20
href=3D"mailto:blburke@ns.sympatico.ca">blburke@ns.sympatico.ca</A></FONT=
></DIV>
<DIV><FONT size=3D2>Dartmouth</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV></FONT></BODY></HTML>

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