Posted by: "Dan Dugan"
> Dan Groebner wrote to Dan Dugan:
>
>> I'm a wildlife biologist working for Arizona Game and Fish
>> interested in recording frog calls in the field (aerially and
>> underwater simultaneously). We have been reintroducing threatened
>> Chiricahua leopard frogs and want to confirm their survival at the
>> reintroduction sites. The areas are so thick it is very difficult
>> to get visuals and their call is not very loud. These frogs are
>> known to call underwater but no one has tried surveying for them in
>> this manner.
>
> Acoustic surveying is a good idea.
For frogs this is very true. But what he's asking about is not survey,
its monitoring a few known sites. That is done differently than survey.
What I've done is primarily survey to determine range.
Rather than a general purpose recorder what he really wants is a
froglogger. These can be programmed to automatically record at
intervals. Even special things like just at intervals during certain
hours each day are no problem.
I have in my archives a few such recordings from which we picked gopher
frog recordings. That was a older froglogger that was cassette based and
recorded one channel with an air based mic and the other with a
hydrophone. That was run for many weeks at a time by John Jensen and
others. I know the GA DNR is still using frogloggers, though probably
still older models as they are poorly funded. The person he should
contact there is:
John Jensen
Georgia Natural Resources Non Game
116 Rum Creek Dr.
Forsyth, GA 31029
Phone: 1-478-994-1438
Here is some links copied from my bookmarks:
http://www.frogloggers.com/
http://froglogger.coquipr.com/mini.html
http://froglogger.coquipr.com/
http://www.pwrc.usgs.gov/monmanual/techniques/froglogger.htm
http://froglogger.coquipr.com/wiki/index.php?title=3DMain_Page
http://www.uga.edu/srelherp/ecoview/Eco19.htm
http://tech.groups.yahoo.com/group/froglogger/
Walt
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