Re: NANFA-- Osmoregulation in freshwater sharks

Bob Bock (bockhouse_at_earthlink.net)
Sun, 20 Jan 2002 17:34:39 -0500

FYI, Jeremy, unlike marine bony fishes, sharks have a higher blood ion
concentration 2 percent, as opposed to about .2 percent in the bony fishes.
This higher concentration is due to urea, which would kill bony fishes in a
concentration so high.
----- Original Message -----
From: "Bruce Stallsmith" <fundulus_at_hotmail.com>
To: <nanfa_at_aquaria.net>
Sent: Sunday, January 20, 2002 2:39 PM
Subject: Re: NANFA-- Osmoregulation in freshwater sharks

> One book that I would add to Dave's excellent list is "The Life of Sharks"
> by Paul Budker on Columbia University Press from the 1970s. It's an
attempt
> to popularize some of the scientific literature and reads well even it's
> slightly dated. He devotes a chapter to discussing freshwater sharks.
>
> --Bruce Stallsmith
> Huntsville, AL, US of A
>
> >I do not know if this is what you are looking for, but here is a list of
> >references on osmoregulation in Elasmobranchs (sorry about the problems
> >with
> >the formatting).
> >
> >Hope this helps
> >
> >Good luck
> >
> >Dave
> >
> > Elasmobranch Osmoregulation
> >
> >BURGER, J. W., AND W. N. HESS. 1960. Function of the rectal gland in
> > the spiny dogfish. Science. 131:67U-671.
> >
> >CHAN, D. K. 0., AND T. M. WONG. 1977a. Physiological adjustments to
> > dilution of the external medium in the lip shark, Hemiscyllium
> > plagiosum (Bennett). I. Size of body compartments and osmolyte
> > composition. J. Exp. Zool. 200:71-84.
> >
> > --- 1977b. Physiological adjustments to dilution of the external
> > medium in the lip shark, Hemiscyllium plagiosum (Bennett). Ill.
> > Oxygen consumption and metabolic rates. J. Exp. Zool. 200:91-102.
> >
> >DOOLITTLE, R. F., C. THOMAS, AND W. STONE Jr. 1960. Osmotic pressure
> > and aqueous humor formation in dogfish. Science. 132:36-37.
> >
> >GRIFFITH, R. W., P. K. T. PANG, A. K. SRIVASTAVA, AND G. E. PICKFORD.
> > 1973. Serum composition of freshwater stingrays (potamotrygonidae)
> > adapted to fresh and dilute sea water. Blol. Bull. 144:304-320.
> >
> >HAYWOOD, G. P.(2OO0) A preliminary investigation into the roles played
> > by the rectal gland and kidneys in the osmoregulatIon of the
> > striped dogfish Poroderma africanus. J. Exp. Zool. 193:167-176.
> >
> >KIDDER, G. W., III. 1991. Effects of luminal osmolarity on gastric
> > acid secretion in the little skate, Raja erinacea. J. Comp.
> >Physiol. B. 161:323-326.
> >
> >OGURI, M. 1964. Rectal gland of marine and fresh-water sharks:
> > comparative histology. Science. 144:1151-1152.
> >
> >STOFF, J. S., P. SILVA, R. LECHAN, R. SOLOMAN, AND F. H. EPSTEIN.
> > 1988. Neural control of shark rectal gland. Amer. J. Physiol. 255:
> >212-216.
> >
> >THORSON, T. B. 1962. Partitioning of body fluids in the Lake Nicaragua
> > shark and three marine sharks. Science. 138:688-690.
> >
> >THORSON, T. B., C. M. COWAN, AND D. E. WATSON. 1967. Potamotrygon
> > spp.: elasmobranchs with low urea content. Science. 158:375-377
> >
> >URIST, M. R. 1961. Calcium and phosphorus in the blood and skeleton of
> > the elasmobranchiI. Endocrinol. 69:778 -801.
> >
> > ---. 1962. Calcium and other ions on blood and skeleton of Nicaragua
> > fresh-water shark. Science. 137:984-986.
> >
> >WONG, T. M., AND D. K. 0. CHAN. 1977. Physiological adjustments to
> > dilution of the external medium in the lip shark, Hemicyllium
> >plagiosum
> >(Bennett). II. Branchial, renal and rectal gland
> > function. J. Exp. Zool. 200:85- 96.
> >
> >American Zoologist 17 (2). 1977 Pang etatl. Osmoregulation in
> >elasmobranches. 365-377
> >
> >
> >Sharks, Skates and Rays. 1967. Gilbert, P.W., Mathewson, R.F., Rall,
D.P.
> >editors. Part II: Osmoregulation, Salt & Water Metabolism. 12 papers
> >pp.177-318.
> >
> >Shuttleworth, T.J. ed. 1988. Phsiology of Elasmobranchs. Chapter 6 & 7.
>
>
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/----------------------------------------------------------------------------- /"Unless stated otherwise, comments made on this list do not necessarily / reflect the beliefs or goals of the North American Native Fishes / Association" / This is the discussion list of the North American Native Fishes Association / nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word / subscribe, unsubscribe, or help in the body (not subject) of an email to / nanfa-request_at_aquaria.net. For a digest version, send the command to / nanfa-digest-request_at_aquaria.net instead. / For more information about NANFA, visit our web page, http://www.nanfa.org