🚀 go-pugleaf

In article <3m3g3n$p0k@server.st.usm.edu>,
Harold Brashears <brshears@whale.st.usm.edu> wrote:

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

The mortality of this species' eggs has been increasing for a few decades.
When exposed to UV, clutches suffered significantly more mortality than 
treatments in which clutches were screened from UV at the same lake.

Hence, the research suggests that the sensitivity of frog eggs, in water, 
to UV radiation is high.  Note that the species are ones that lay eggs in 
shallow water and have low levels of ligase (?been a while since 
genetics; I mean the DNA repair enzyme that corrects UV damage).  Hence, 
a very viable hypothesis for their decline is increased exposure to UV.

>I stopped reading Scientific American some time back.  Even though

??This research appeared in Science, not Scientific American.  The SA 
article is a review of this and other research on declines in amphibian 
populations.

>Regards, Harold

Bryant