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Article #7181

Re: Frog declines indication of ozone depletion

#7181
From: Robert Granholm
Date: Mon, 10 Apr 1995 00:00
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In article <3m3g3n$p0k@server.st.usm.edu> brshears@whale.st.usm.edu (Harold Brashears) writes:
>From: brshears@whale.st.usm.edu (Harold Brashears)
>Subject: Re: Frog declines indication of ozone depletion
>Date: 7 Apr 1995 13:52:55 GMT



>Please let us know if there is more than one recording of an
>increase in UV at ground level under water where the frogs lay
>their eggs? 

The results were from four different frog populations in various locations 
(Cascade frogs, western toads, Pacific treefrogs and northwestern salamanders).


 What is the sensitivity of frog eggs, in water, to
>UV radiation?  How was other possible reasons (increased predation,
>percipitation variations, etc.) accounted for?

Control eggs from the same egg batch  were hatched in the same water isndie 
the labroritory without any of the adverse esults noticed in wild populations.

>I stopped reading Scientific American some time back.  Even though
>I generally enjoyed some of the magazine, many of the articles
>were insufficiently entertaining as science fiction, and  not
>persuasive as science.

>[deleted]

>Regards, Harold
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From: granholm@direct.ca (Robert Granholm)
Subject: Re: Frog declines indication of ozone depletion
Date: 1995/04/10
Message-ID: <granholm.32.2F887581@direct.ca>
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references: <granholm.19.2F7DC160@direct.ca> <3m3g3n$p0k@server.st.usm.edu>
organization: Frontiers
newsgroups: ca.environment,sci.environment,talk.environment