Also, becasue of the nature of its signal and its relatively shallow marine=
environment, the sound of the insect doesn=92t carry very far. The snappin=
g shrimp, by contrast, puts out a signal so loud that it momentarily stuns =
prey (usually fish) as they swim by. The shrimp=92s targets are immobilized=
long enough for the shrimp to snag a bite of lunch from the caudal or dors=
al fin, for example.
Bernie
Wild Sanctuary
POB 536
Glen Ellen, CA 95442
707-327-6771
http://www.wildsanctuary.com
SKYPE: WildSanctuary
FaceBook: http://www.facebook.com/BernieKrauseAuthor
TED Global talk: https://www.ted.com/talks/bernie_krause_the_voice_of_the_n=
atural_world?language=3Den
> On Feb 3, 2018, at 7:30 AM, 303 [naturerecordists] <n=
> wrote:
>
>
>
> 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 c=
ase when I was recording. Only the hydrophones picked up its call.
>
>> On 3 Feb 2018, at 23:15, Bernie Krause <c=
> [naturerecordists] <=
m <>> 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 leng=
th, and part of the Alpheidae family, is probably louder vis a vis size. Un=
derwater the snapping shrimp will generate an impulse signal of around 200d=
B re 1micro Pascal, which is equivalent to firing off a ..357 Magnum pistol=
about 30 cm from your ear (or about 165dB in air).
>>
>>
>> Bernie
>>
>> Wild Sanctuary
>> POB 536
>> Glen Ellen, CA 95442
>> 707-327-6771
>> http://www.wildsanctuary.com <http://www..wildsanctuary.com/>
>> <>
>> SKYPE: WildSanctuary
>> FaceBook: http://www.facebook.com/BernieKrauseAuthor <http://www.faceboo=
k.com/BernieKrauseAuthor>
>> TED Global talk: https://www.ted.com/talks/bernie_krause_the_voice_of_th=
e_natural_world?language=3Den <https://www.ted.com/talks/bernie_krause_the_=
voice_of_the_natural_world?language=3Den>
>>
>>> On Feb 3, 2018, at 7:03 AM, 303 <=
noise.be> [naturerecordists] < <natu=
>> wrote:
>>>
>>>
>>>
>>> Thanks Bernie, is this what you=92re talking about?
>>> http://www.bbc.co.uk/nature/13958630 <http://www.bbc.co.uk/nature/13958=
630>
>>>
>>>
>>>> On 3 Feb 2018, at 22:16, Bernie Krause <mailto=
:> [naturerecordists] <=
com <>> wrote:
>>>>
>>>> Mostly, it sounds like common species of what, in English, are called =
water-boatmen (Corixidae). These can be found everywhere there is fresh wat=
er and decaying floral debris in vernal pools, in shallow water by ponds an=
d lakeside, and even by the curb after a spring or summer rain, etc.
>>>>
>>>>
>>>> We first encountered these signatures in late March, 1984, at Mono Lak=
e just east of the Sierra Nevada Mountains along the Eastern border of Cali=
fornia while recording the Great Basin spadefoot toad (Spea intermontana) i=
n a study for the University of California in Santa Cruz led by the late Ke=
n Norris (who identified how dolphins generate and receive echolocation sig=
nals). We were recording to see if the tadpoles generated sound (they do), =
and if the vocalizations of the adults carried in water as well as air (the=
y do). At the same time, we picked up these odd scraping sounds (water-boat=
men) 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 wer=
e 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
>>>> http://www.wildsanctuary.com <http://www..wildsanctuary.com/>
>>>> <>
>>>> SKYPE: WildSanctuary
>>>> FaceBook: http://www.facebook.com/BernieKrauseAuthor <http://www..face=
book.com/BernieKrauseAuthor>
>>>> TED Global talk: https://www.ted.com/talks/bernie_krause_the_voice_of_=
the_natural_world?language=3Den <https://www.ted.com/talks/bernie_krause_th=
e_voice_of_the_natural_world?language=3Den>
>>>>
>>>>> On Feb 3, 2018, at 1:20 AM, <calandrel=
> [naturerecordists] < <mailt=
o:>> wrote:
>>>>>
>>>>>
>>>>>
>>>>> Below the links to soundcloud for two of my underwater recordings fro=
m Italy.
>>>>> Sounds are similar to that of your recording, but surely emitted by d=
ifferent species of small aquatic insects.
>>>>>
>>>>> Marco
>>>>>
>>>>> https://soundcloud.com/marco- pesente/corixa-punctata-sound <https://=
soundcloud..com/marco-pesente/corixa-punctata-sound>
>>>>> https://soundcloud.com/marco- pesente/micronecta-sp-lesser- water <ht=
tps://soundcloud.com/marco-pesente/micronecta-sp-lesser-water>
>>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
>
>
>
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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