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Re: Help with underwater identification please

Subject: Re: Help with underwater identification please
From: "303" quies_still
Date: Sat Feb 3, 2018 7:30 am ((PST))
Interesting. Several of the articles I read about the water boat men say it=
=92s that loud it can be heard above water. That was definitely not the cas=
e when I was recording. Only the hydrophones picked up its call.

> On 3 Feb 2018, at 23:15, Bernie Krause  [naturerec=
ordists] <> wrote:
> Yup! But I=92m guessing that the article is mistaken in that perhaps the =
snapping shrimp (sometimes called pistol shrimp), a bit under 4 cm in lengt=
h, and part of the Alpheidae family, is probably louder vis a vis size. Und=
erwater the snapping shrimp will generate an impulse signal of around 200dB=
 re 1micro Pascal, which is equivalent to firing off a .357 Magnum pistol a=
bout 30 cm from your ear (or about 165dB in air).
> Bernie
> Wild Sanctuary
> POB 536
> Glen Ellen, CA 95442
> 707-327-6771
> <>
>  <>
> SKYPE: WildSanctuary
> FaceBook: <http://www.facebook=>
> TED Global talk:
_natural_world?language=3Den <
>> On Feb 3, 2018, at 7:03 AM, 303  <=> [naturerecordists] < <natur=
>> wrote:
>> Thanks Bernie, is this what you=92re talking about?
>> <
>>> On 3 Feb 2018, at 22:16, Bernie Krause  <mailto:=
> [naturerecordists] <=
om <>> wrote:
>>> Mostly, it sounds like common species of what, in English, are called w=
ater-boatmen (Corixidae). These can be found everywhere there is fresh wate=
r and decaying floral debris in vernal pools, in shallow water by ponds and=
 lakeside, and even by the curb after a spring or summer rain, etc.
>>> We first encountered these signatures in late March, 1984, at Mono Lake=
 just east of the Sierra Nevada Mountains along the Eastern border of Calif=
ornia while recording the Great Basin spadefoot toad (Spea intermontana) in=
 a study for the University of California in Santa Cruz led by the late Ken=
 Norris (who identified how dolphins generate and receive echolocation sign=
als). We were recording to see if the tadpoles generated sound (they do), a=
nd if the vocalizations of the adults carried in water as well as air (they=
 do). At the same time, we picked up these odd scraping sounds (water-boatm=
en) but couldn=92t identify them, at first. But after filling some buckets =
with water and mud from the pond, and sifting through the material, we were=
 left with the water-boatmen and were able to record them separately, thus =
figuring out the source.
>>> Bernie
>>> Wild Sanctuary
>>> POB 536
>>> Glen Ellen, CA 95442
>>> 707-327-6771
>>> <>
>>>  <>
>>> SKYPE: WildSanctuary
>>> FaceBook: <http://www.facebo=>
>>> TED Global talk:
he_natural_world?language=3Den <
>>>> On Feb 3, 2018, at 1:20 AM,  <calandrell=
> [naturerecordists] < <mailto=
:>> wrote:
>>>> Below the links to soundcloud for two of my underwater recordings from=
>>>> Sounds are similar to that of your recording, but surely emitted by di=
fferent species of small aquatic insects.
>>>> Marco
>>>> pesente/corixa-punctata-sound <https://s=>
>>>> pesente/micronecta-sp-lesser- water <htt=

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