Estimating Florida manatee (Trichechus manatus latirostris) abundance using passive acoustic methods

Athena M. Rycyk; Cora Berchem; Tiago A. Marques

doi:10.1121/10.0010495

Estimating Florida manatee (Trichechus manatus latirostris) abundance using passive acoustic methods

Athena M. Rycyk^*, Cora Berchem, Tiago A. Marques

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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Abstract

Manatees are difficult to detect, particularly cryptic populations that inhabit areas with limited water clarity. The effectiveness of using vocal detections to estimate manatee abundance was evaluated in a clear water spring where manatees congregate seasonally. Vocalizations were extracted by a detection classifier that clustered sounds with similar spectral properties. Vocalization counts from recordings in Blue Spring, FL, USA were strong predictors of manatee abundance. The link between independent visual counts and abundance estimates from passive acoustic monitoring was used to provide an estimate of 1.059 (95% confidence interval 0.963–1.127) vocalizations/manatee/5-min, which might be used elsewhere for cue counting of manatees.

Original language	English
Article number	051202
Number of pages	8
Journal	JASA Express Letters
Volume	2
Issue number	5
Early online date	13 May 2022
DOIs	https://doi.org/10.1121/10.0010495
Publication status	Published - May 2022

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Cite this

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title = "Estimating Florida manatee (Trichechus manatus latirostris) abundance using passive acoustic methods",

abstract = "Manatees are difficult to detect, particularly cryptic populations that inhabit areas with limited water clarity. The effectiveness of using vocal detections to estimate manatee abundance was evaluated in a clear water spring where manatees congregate seasonally. Vocalizations were extracted by a detection classifier that clustered sounds with similar spectral properties. Vocalization counts from recordings in Blue Spring, FL, USA were strong predictors of manatee abundance. The link between independent visual counts and abundance estimates from passive acoustic monitoring was used to provide an estimate of 1.059 (95% confidence interval 0.963–1.127) vocalizations/manatee/5-min, which might be used elsewhere for cue counting of manatees.",

author = "Rycyk, {Athena M.} and Cora Berchem and Marques, {Tiago A.}",

note = "T.A.M.{\textquoteright}s contribution was conducted under the ACCURATE project, funded by the U.S. Navy Living Marine Resources program (Contract No. N3943019C2176) with partial support by CEAUL (funded by FCT— Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia, Portugal, through the project UIDB/00006/2020).",

year = "2022",

month = may,

doi = "10.1121/10.0010495",

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AU - Rycyk, Athena M.

AU - Berchem, Cora

AU - Marques, Tiago A.

N1 - T.A.M.’s contribution was conducted under the ACCURATE project, funded by the U.S. Navy Living Marine Resources program (Contract No. N3943019C2176) with partial support by CEAUL (funded by FCT— Fundação para a Ciência e a Tecnologia, Portugal, through the project UIDB/00006/2020).

PY - 2022/5

Y1 - 2022/5

N2 - Manatees are difficult to detect, particularly cryptic populations that inhabit areas with limited water clarity. The effectiveness of using vocal detections to estimate manatee abundance was evaluated in a clear water spring where manatees congregate seasonally. Vocalizations were extracted by a detection classifier that clustered sounds with similar spectral properties. Vocalization counts from recordings in Blue Spring, FL, USA were strong predictors of manatee abundance. The link between independent visual counts and abundance estimates from passive acoustic monitoring was used to provide an estimate of 1.059 (95% confidence interval 0.963–1.127) vocalizations/manatee/5-min, which might be used elsewhere for cue counting of manatees.

AB - Manatees are difficult to detect, particularly cryptic populations that inhabit areas with limited water clarity. The effectiveness of using vocal detections to estimate manatee abundance was evaluated in a clear water spring where manatees congregate seasonally. Vocalizations were extracted by a detection classifier that clustered sounds with similar spectral properties. Vocalization counts from recordings in Blue Spring, FL, USA were strong predictors of manatee abundance. The link between independent visual counts and abundance estimates from passive acoustic monitoring was used to provide an estimate of 1.059 (95% confidence interval 0.963–1.127) vocalizations/manatee/5-min, which might be used elsewhere for cue counting of manatees.

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DO - 10.1121/10.0010495

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IS - 5

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ER -

Estimating Florida manatee (Trichechus manatus latirostris) abundance using passive acoustic methods

Abstract

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