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Marine Soundscape and Fish Chorus in an Archipelago Ecosystem comprising Bio-Diverse Tropical Islands off Goa Coast, India.

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Title Marine Soundscape and Fish Chorus in an Archipelago Ecosystem comprising Bio-Diverse Tropical Islands off Goa Coast, India.
Not Available
 
Creator Chary LK, Sreekanth GB, Deshmukh MK and Sharma N
 
Subject Fish chorus, Grande Island Archipelago, Marine soundscape, Passive acoustic monitoring, Tropical shallow-water environment, Underwater visual census, Fish chorus, Grande Island Archipelago, Marine soundscape, Passive acoustic monitoring, Tropical shallow-water environment, Underwater visual census
 
Description Not Available
Many biological sources of sound in tropical coastal shallow-water marine environments remain unidentified. Characterizing the soundscape of such environments requires that all sources of biological sound be examined for their distinct patterns and specific frequency ranges. The present study identified soniferous fish in the ecosystem and measured underwater ambient sound in terms of its sound pressure levels (SPL) to quantify and characterize their contribution to the soundscape. Underwater SPLs were measured from 2012 to 2016 at a site near Grande Island Archipelago (15°18′ N, 73°41′ E) 18 km off the coast of the state of Goa, which lies along India’s western coast. Acoustic data were recorded using three types of methods for passive acoustic monitoring, namely a hanging hydrophone, five seabed-mounted hydrophones, and an autonomous moored vertical hydrophone. Underwater visual census (UVC) at the site (Sreekanth et al 2015, 2019) revealed that both species richness and diversity (3.12)were high indicating the Grande island archipelago is a bio-diverse site. The seabed-mounted hydrophones proved to be the best choice for long-term SPL measurements, although the moored arrays were more economical. Ambient sound levels underwater varied markedly over time both within a day and with the season. Long-term SPLs were above 100 dB re 1µ Pa over frequencies 62.5 Hz - 8000 Hz and peaked to 120-130 dB re 1µ Pa between frequencies 500 Hz and 1000 Hz, corresponding to the chorus frequencies of soniferous fish at the site. High sound pressure levels and marked temporal variations of the soundscape indicate the abundance, diversity and life activities of fish species and healthy ecological state of the bio-diverse archipelago.
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Date 2020-05-22T04:27:37Z
2020-05-22T04:27:37Z
2020-02-01
 
Type Article
 
Identifier Chary LK, Sreekanth GB, Deshmukh MK and Sharma N. 2020. Marine Soundscape and Fish Chorus in an Archipelago Ecosystem comprising Bio-Diverse Tropical Islands off Goa Coast, India. Aquatic Ecology (2020). https://doi.org/10.1007/s10452-020-09754-0
1386-2588
http://krishi.icar.gov.in/jspui/handle/123456789/36093
 
Language English
 
Relation Not Available;
 
Publisher Springer