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Re: Underwater mysteries

Subject: Re: Underwater mysteries
From: "Gianni Pavan" gianni_pavan
Date: Sun Feb 25, 2007 2:07 am ((PST))
John,
sound production (stridulation) is widespread among Coleoptera. 
Dytiscidae do produce sound; I don't know about Elmidae. Dytiscidae, 
also called diving beetles, are much more water adapted than Elmidae. 
For a closer, but still preliminary, identification look at 
http://ltreadwell.ifas.ufl.edu/insects/09Coleoptera.htm Unfortunately 
most identification tables don't tell about sound!

Gianni



At 07.07 23/02/2007, you wrote:

>Gianni,
>
>Thank you for the additional clues. From what you and Bernie have
>written, what I recorded is likely an insect and not a frog.
>
>I found a recent publication by The Xerces Society for Invertebrate
>Conservation for my local area:
>
><http://www.columbiaslough.org/PDFs/Bugs/2006_June_Handbook3b.pdf>http://www.columbiaslough.org/PDFs/Bugs/2006_June_Handbook3b.pdf
>
>It has some descriptions of the beetles in those waters. The photo
>closest to resembling what I think I saw is the riffle beetle
>(Elmidae) on page18.
>
>Perhaps I'll pass my recording along to the author and see what he
>thinks. And, I must return soon to record and observe again: maybe
>I'll find something more definitive.
>
>John Hartog
>
>--- In 
><naturerecordists%40yahoogroups.com> 
>Gianni Pavan <> wrote:
> >
> > the sounds seems to be stridulations made by some aquatic insect. I
> > often recorded similar sounds from some species of Ditisicidae
> > (Coleoptera). A specimen is of course required to make a correct
> > identification.
> >
> > Gianni
> >
>----------------------------------------------------------
> > Gianni Pavan
> > Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
> > Universita' degli Studi di Pavia, Via Taramelli 24, 27100 PAVIA, ITALIA
> > Phone +39-0382-987874 Fax +39-02-700-32921
> > Email  
> > Web <http://www.unipv.it/cibra>http://www.unipv.it/cibra
> >
>----------------------------------------------------------
> > CIBRA organizes the XXI IBAC Congress, Pavia, 15-18 September 2007
> >
>----------------------------------------------------------
>
> >
> >
> >
> >
> > --
> > No virus found in this outgoing message.
> > Checked by AVG Free Edition.
> > Version: 7.5.441 / Virus Database: 268.18.3/696 - Release Date:
>21/02/2007 15.19
> >
>
>
>
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.441 / Virus Database: 268.18.3/698 - Release Date: 
>23/02/2007 4.39

-------------------------------------------------------------------------------------------------------
Gianni Pavan
Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
Universita' degli Studi di Pavia, Via Taramelli 24, 27100 PAVIA, ITALIA
Phone       +39-0382-987874    Fax +39-02-700-32921
Email      
Web       http://www.unipv.it/cibra
--------------------------------------------------------------------------------------------------------
CIBRA organizes the XXI IBAC Congress, Pavia, 15-18 September 2007
--------------------------------------------------------------------------------------------------------
 



  ----------



No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.3/700 - Release Date: 24/02/2007 20.14







"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg

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