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Titolo:
Underwater ambient noise measurements in aquaculture systems: a survey
Autore:
Bart, AN; Clark, J; Young, J; Zohar, Y;
Indirizzi:
Univ Maryland, Ctr Marine Biotechnol, Inst Biotechnol, Baltimore, MD 21202USA Univ Maryland Baltimore MD USA 21202 t Biotechnol, Baltimore, MD 21202USA Carde Rock Naval Surface Warfare Ctr, Bethesda, MD 20817 USA Carde Rock Naval Surface Warfare Ctr Bethesda MD USA 20817 , MD 20817 USA
Titolo Testata:
AQUACULTURAL ENGINEERING
fascicolo: 2, volume: 25, anno: 2001,
pagine: 99 - 110
SICI:
0144-8609(200109)25:2<99:UANMIA>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOUND; FISH;
Keywords:
aquaculture systems; frequency; sound pressure levels; underwater noise; fish;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Bart, AN Asian Inst Technol, Aquaculture & Aquat Resource Management, Box 4, Klong Luang 12120, Pathumthani, Thailand Asian Inst Technol Box 4 Klong Luang Pathumthani Thailand 12120 d
Citazione:
A.N. Bart et al., "Underwater ambient noise measurements in aquaculture systems: a survey", AQUACULT EN, 25(2), 2001, pp. 99-110

Abstract

In order to understand the effect of environmental waterborne sound on cultured fish an ambient noise survey was conducted in enclosed recirculating raceways, fiberglass and concrete culture tanks, and in outdoor open ponds. Two distinct low and high frequency regions of sound were observed, above and below 315 Hz one-third octave band. Low frequency sounds were dominant in all systems measured. Overall noise levels were not significantly different between concrete or wooden frame raceways. However, the noise level in the low frequency range was higher by approximately 10 dB re:1 mu Pa in theconcrete raceway. Low frequency noise was particularly high (130 dB re:1 mu Pa) in fiberglass tanks when compared with that in the concrete tanks (110 dB re: 1 mu Pa). High frequency underwater noise was generated mostly by electrical motors, oscillating and collapsing air bubbles, aeration, and water pump action. Low frequency noise was generated by water flows, ground vibrations, tank wall vibrations and electrical pumps. In the high frequency(1-2 kHz) region, Sound Pressure Levels (SPL) ranged from 100 to 115 dB (re: 1 mu Pa). In low frequency region (25-1000 Hz), SPL ranged from 125 to 135 dB (re: 1 mu Pa). These high SPLs at lower frequencies are within the hearing range of most teleost species that have been studied (R.R. Fay and A.M. Simmons, Comparative Hearing: Fishes and Amphibians, Springer, New York,1999). Subjecting juvenile or adult fish to these high levels of chronic and or acute noise that are present in many hatcheries and culture systems may adversely effect their health and well being. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 01/12/20 alle ore 07:33:55