Hi all:

When working with albino specimens we have to remember that their skin has
less protection against UVs. Thus, is not very strange that some albino
fishes can have some sunburns. That doesn't proove that the water
temperature is "severely" increased by solar radiation.
I'm not an expert in this matter but i think i should do this remark.

Good work for all

Diogo Alagador
(Portugal)

----- Original Message -----
From: Michael Cooperman <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, January 26, 2001 4:59 PM
Subject: Re: fish thermal "basking"


> Hi Joe,
>      I don't have any real literature to offer, or even an opinion, but i
do
> remember one interesting story:
>
> A few years ago the geniuses in Idaho tried to breed an albino hatchery
> rainbow trout, to make them easier for fishermen to spot.  The program was
> shut down when they realized the fish were suffering from sunburn!  To the
> best of my knowledge this is a true story, and would suggest solar
> irradiation might be significant.  Perhaps Bob G. would know more?
>
> Go luck,
> Michael C.
>
> -----Original Message-----
> From: Scientific forum on fish and fisheries
> [mailto:[log in to unmask]]On Behalf Of Joseph Ebersole
> Sent: Thursday, January 25, 2001 1:28 PM
> To: [log in to unmask]
> Subject: fish thermal "basking"
>
>
> Greetings,
>
> In my analysis of fine-scale patterns of habitat use by stream fishes in
> relation to temperature, I've been confronted with a potential problem.
> The temperature recording devices I use absorb solar radiation when
> deployed in water <20cm deep, thus record water temperatures greater than
> the actual ambient water temperature.  Does anyone know to what degree
> body temperatures of fish may be elevated by exposure to direct solar
> radiation in shallow water? I've been assuming it's minimal, given
> presumed ability of the fish to integrate various sources and sinks of
> heat - and that the ambient water temperature (conduction) is the
> predominate factor influencing fish body temperature. But I'm no physicist
> by any means and might be missing something!
>
> I'd appreciate any replies, and will summarize all responses and post back
> here.
>
> Thanks in advance,
> Joe
>
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> Joseph L. Ebersole                                   541-737-1979 (office)
> Dept. of Fisheries and Wildlife, Nash Hall 104       [log in to unmask]
> Oregon State University
> Corvallis, OR 97331
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