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rvation
Quoting Ronald Arsenault <rongarsenault@gmail.com>:
> This may in fact be good news. Scott Makepeace, NB Dept. Nat. Resources
> biologist who monitors owls, told me that his work has revealed that the
> response rate of owls is actually inversely related to their nesting
> success, especially with Barred Owls, if I remember correctly. In other
> words, owls which have settled down with nesting duties are much less
> likely to respond to a taped call than are owls who are either looking for
> a mate or whose nesting attempt has failed.
* the same thing may be true of some auditory monitoring of frogs - we
hear the most calling in prolonged seasons when things drag on - but
the frogs may do best when conditions are briefly favourable, males
and females come to the ponds all at the same time, eggs are laid, and
the parents head back to the woods after a minimal expenditure of time
and energy in breeding. We've always got to be careful when we use
something other than the actual production of young to monitor
population success.
fred.
===============================================
>
> On Tue, Apr 16, 2013 at 11:30 AM, Randy Lauff <randy.lauff@gmail.com> wrote:
>
>> Krista and I did the Fairmont (Ant. Coi.) route last night. Frogs were
>> barely an issue as it was about -3 oC the whole time. Three or four years
>> ago, I got a dozen (?) or so Barreds, GHOW and S'whets. Last year, skunked.
>> This year, under similarly ideal conditions as last year...skunked. Very
>> perplexing.
>>
>> Randy
>>
>> _________________________________
>> RF Lauff
>> Way in the boonies of
>> Antigonish County, NS.
>>
>>
>> On 16 April 2013 01:13, James Hirtle <jrhbirder@hotmail.com> wrote:
>>
>>>
>>> An interesting evening for running this route with owls on 8 out of 10
>>> stops. We missed out on owls interestingly on two of the stops that we
>>> usually get them. One of these stops now has a trailer at the location, so
>>> that could be the reason. The other stop we always have wood frogs and
>>> spring peepers so loud that it is unbelievable, but by that point the
>>> temperature had dropped to around freezing. Wood frogs and spring peepers
>>> were at the first five stops and I suspect we would have heard them on all
>>> stops had the temperature not dropped. As the temperature dropped the owls
>>> seemed to become less vocal. I don't know if any studies have been done in
>>> respects to this observation or not. In all we had 10 barred owls. Most
>>> of the owls all except for the first stop where there were three, two of
>>> which were seen, were all more distant than is the norm on this route.
>>>
>>> James R. Hirtle
>>> Bridgewater
>>>
>>>
>>
>
>
> --
> Ronald G. Arsenault
> Moncton, N.B.
>
------------------------------------------------------------
Frederick W. Schueler & Aleta Karstad
Bishops Mills Natural History Centre - http://pinicola.ca/bmnhc.htm
Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
Daily Paintings - http://karstaddailypaintings.blogspot.com/
South Nation Basin Art & Science Book
http://pinicola.ca/books/SNR_book.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
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