Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate

Cue counting is a method developed for estimating vocally active wildlife density by dividing the density of cues (number of cues per unit area surveyed per unit time) by the average cue rate (ACR) at which individuals vocalize. It has been used successfully to estimate whale density using passive a...

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Autores principales:	Cristian Pérez-Granados, Adrián Barrero, Juan Traba, Daniel Bustillo-de la Rosa, Margarita Reverter, Julia Gómez-Catasús
Formato:	article
Lenguaje:	EN
Publicado:	Resilience Alliance 2021
Materias:	autonomous recording unit <span style="font-style: normal">chersophilus duponti </span> population estimates vocal activity wildlife monitoring xeno-canto Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/9c1a3fe569fe4941ac2f0288c489e439
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spelling	oai:doaj.org-article:9c1a3fe569fe4941ac2f0288c489e4392021-11-15T16:40:14ZAssessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate1712-6568https://doaj.org/article/9c1a3fe569fe4941ac2f0288c489e4392021-06-01T00:00:00Zhttps://www.ace-eco.org/vol16/iss1/art11/https://doaj.org/toc/1712-6568Cue counting is a method developed for estimating vocally active wildlife density by dividing the density of cues (number of cues per unit area surveyed per unit time) by the average cue rate (ACR) at which individuals vocalize. It has been used successfully to estimate whale density using passive acoustic monitoring, but its efficacy has had limited testing in birds. We tested whether cue counting can be used to infer bird abundance using autonomous recording units and estimated the minimum effort required to obtain a reliable cue rate at individual and population levels. We recorded Dupont's Lark (Chersophilus duponti) vocalizations at 31 sites where traditional field censuses were also performed. We estimated the ACR using three methodologies: directional recordings, recordings from an online database of bird sounds (xeno-canto), and behavioral field studies. The ACRs estimated using directional recordings and behavioral field studies were similar, and bird numbers were over and underestimated by 0.8 and 10%, respectively (74-77% of the sampling sites were well estimated). However, the ACR estimated using xeno-canto recordings was much higher than those estimated using the other two methods, and bird numbers were underestimated by 41%. We also performed a cost-effectiveness assessment of the number of individuals and recording durations needed to optimize the estimation of a reliable ACR. We found that ACR estimates were more efficient if long (25 min) recordings were used when < 4 males were recorded, whereas 5-min recordings were more efficient for ≥ 20 males. We conclude that cue counting can be useful to infer bird density around recorders but requires an accurate measure of the ACR. Further research should evaluate the effectiveness of passive cue counting on a large number of species and under different circumstances.Cristian Pérez-GranadosAdrián BarreroJuan TrabaDaniel Bustillo-de la RosaMargarita ReverterJulia Gómez-CatasúsResilience Alliancearticleautonomous recording unit<span style="font-style: normal">chersophilus duponti</span> population estimatesvocal activitywildlife monitoringxeno-cantoPlant cultureSB1-1110Environmental sciencesGE1-350Plant ecologyQK900-989ENAvian Conservation and Ecology, Vol 16, Iss 1, p 11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	autonomous recording unit <span style="font-style: normal">chersophilus duponti </span> population estimates vocal activity wildlife monitoring xeno-canto Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
spellingShingle	autonomous recording unit <span style="font-style: normal">chersophilus duponti </span> population estimates vocal activity wildlife monitoring xeno-canto Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989 Cristian Pérez-Granados Adrián Barrero Juan Traba Daniel Bustillo-de la Rosa Margarita Reverter Julia Gómez-Catasús Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate
description	Cue counting is a method developed for estimating vocally active wildlife density by dividing the density of cues (number of cues per unit area surveyed per unit time) by the average cue rate (ACR) at which individuals vocalize. It has been used successfully to estimate whale density using passive acoustic monitoring, but its efficacy has had limited testing in birds. We tested whether cue counting can be used to infer bird abundance using autonomous recording units and estimated the minimum effort required to obtain a reliable cue rate at individual and population levels. We recorded Dupont's Lark (Chersophilus duponti) vocalizations at 31 sites where traditional field censuses were also performed. We estimated the ACR using three methodologies: directional recordings, recordings from an online database of bird sounds (xeno-canto), and behavioral field studies. The ACRs estimated using directional recordings and behavioral field studies were similar, and bird numbers were over and underestimated by 0.8 and 10%, respectively (74-77% of the sampling sites were well estimated). However, the ACR estimated using xeno-canto recordings was much higher than those estimated using the other two methods, and bird numbers were underestimated by 41%. We also performed a cost-effectiveness assessment of the number of individuals and recording durations needed to optimize the estimation of a reliable ACR. We found that ACR estimates were more efficient if long (25 min) recordings were used when < 4 males were recorded, whereas 5-min recordings were more efficient for ≥ 20 males. We conclude that cue counting can be useful to infer bird density around recorders but requires an accurate measure of the ACR. Further research should evaluate the effectiveness of passive cue counting on a large number of species and under different circumstances.
format	article
author	Cristian Pérez-Granados Adrián Barrero Juan Traba Daniel Bustillo-de la Rosa Margarita Reverter Julia Gómez-Catasús
author_facet	Cristian Pérez-Granados Adrián Barrero Juan Traba Daniel Bustillo-de la Rosa Margarita Reverter Julia Gómez-Catasús
author_sort	Cristian Pérez-Granados
title	Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate
title_short	Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate
title_full	Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate
title_fullStr	Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate
title_full_unstemmed	Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate
title_sort	assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate
publisher	Resilience Alliance
publishDate	2021
url	https://doaj.org/article/9c1a3fe569fe4941ac2f0288c489e439
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Assessment of cue counting for estimating bird density using passive acoustic monitoring: recommendations for estimating a reliable cue rate

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