Estimating fish abundance at spawning aggregations from courtship sound levels

Abstract Sound produced by fish spawning aggregations (FSAs) permits the use of passive acoustic methods to identify the timing and location of spawning. However, difficulties in relating sound levels to abundance have impeded the use of passive acoustics to conduct quantitative assessments of bioma...

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Autores principales:	Timothy J. Rowell, David A. Demer, Octavio Aburto-Oropeza, Juan José Cota-Nieto, John R. Hyde, Brad E. Erisman
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c63321c1121947cd8009bcdd2225d366
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spelling	oai:doaj.org-article:c63321c1121947cd8009bcdd2225d3662021-12-02T11:41:00ZEstimating fish abundance at spawning aggregations from courtship sound levels10.1038/s41598-017-03383-82045-2322https://doaj.org/article/c63321c1121947cd8009bcdd2225d3662017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03383-8https://doaj.org/toc/2045-2322Abstract Sound produced by fish spawning aggregations (FSAs) permits the use of passive acoustic methods to identify the timing and location of spawning. However, difficulties in relating sound levels to abundance have impeded the use of passive acoustics to conduct quantitative assessments of biomass. Here we show that models of measured fish sound production versus independently measured fish density can be generated to estimate abundance and biomass from sound levels at FSAs. We compared sound levels produced by spawning Gulf Corvina (Cynoscion othonopterus) with simultaneous measurements of density from active acoustic surveys in the Colorado River Delta, Mexico. During the formation of FSAs, we estimated peak abundance at 1.53 to 1.55 million fish, which equated to a biomass of 2,133 to 2,145 metric tons. Sound levels ranged from 0.02 to 12,738 Pa2, with larger measurements observed on outgoing tides. The relationship between sound levels and densities was variable across the duration of surveys but stabilized during the peak spawning period after high tide to produce a linear relationship. Our results support the use of active acoustic methods to estimate density, abundance, and biomass of fish at FSAs; using appropriately scaled empirical relationships, sound levels can be used to infer these estimates.Timothy J. RowellDavid A. DemerOctavio Aburto-OropezaJuan José Cota-NietoJohn R. HydeBrad E. ErismanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Timothy J. Rowell David A. Demer Octavio Aburto-Oropeza Juan José Cota-Nieto John R. Hyde Brad E. Erisman Estimating fish abundance at spawning aggregations from courtship sound levels
description	Abstract Sound produced by fish spawning aggregations (FSAs) permits the use of passive acoustic methods to identify the timing and location of spawning. However, difficulties in relating sound levels to abundance have impeded the use of passive acoustics to conduct quantitative assessments of biomass. Here we show that models of measured fish sound production versus independently measured fish density can be generated to estimate abundance and biomass from sound levels at FSAs. We compared sound levels produced by spawning Gulf Corvina (Cynoscion othonopterus) with simultaneous measurements of density from active acoustic surveys in the Colorado River Delta, Mexico. During the formation of FSAs, we estimated peak abundance at 1.53 to 1.55 million fish, which equated to a biomass of 2,133 to 2,145 metric tons. Sound levels ranged from 0.02 to 12,738 Pa2, with larger measurements observed on outgoing tides. The relationship between sound levels and densities was variable across the duration of surveys but stabilized during the peak spawning period after high tide to produce a linear relationship. Our results support the use of active acoustic methods to estimate density, abundance, and biomass of fish at FSAs; using appropriately scaled empirical relationships, sound levels can be used to infer these estimates.
format	article
author	Timothy J. Rowell David A. Demer Octavio Aburto-Oropeza Juan José Cota-Nieto John R. Hyde Brad E. Erisman
author_facet	Timothy J. Rowell David A. Demer Octavio Aburto-Oropeza Juan José Cota-Nieto John R. Hyde Brad E. Erisman
author_sort	Timothy J. Rowell
title	Estimating fish abundance at spawning aggregations from courtship sound levels
title_short	Estimating fish abundance at spawning aggregations from courtship sound levels
title_full	Estimating fish abundance at spawning aggregations from courtship sound levels
title_fullStr	Estimating fish abundance at spawning aggregations from courtship sound levels
title_full_unstemmed	Estimating fish abundance at spawning aggregations from courtship sound levels
title_sort	estimating fish abundance at spawning aggregations from courtship sound levels
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c63321c1121947cd8009bcdd2225d366
work_keys_str_mv	AT timothyjrowell estimatingfishabundanceatspawningaggregationsfromcourtshipsoundlevels AT davidademer estimatingfishabundanceatspawningaggregationsfromcourtshipsoundlevels AT octavioaburtooropeza estimatingfishabundanceatspawningaggregationsfromcourtshipsoundlevels AT juanjosecotanieto estimatingfishabundanceatspawningaggregationsfromcourtshipsoundlevels AT johnrhyde estimatingfishabundanceatspawningaggregationsfromcourtshipsoundlevels AT bradeerisman estimatingfishabundanceatspawningaggregationsfromcourtshipsoundlevels
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Estimating fish abundance at spawning aggregations from courtship sound levels

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