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Methods for assessment of short-term coral reef fish movements within an acoustic array

BACKGROUND: Arrays of passive receivers are a widely used tool for tracking the movements of acoustically-tagged fish in marine ecosystems; however, the spatial and temporal heterogeneity of coral reef environments pose challenges for the interpretation of tag detection data. To improve this situati...

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Autores principales: Farmer, Nicholas A, Ault, Jerald S, Smith, Steven G, Franklin, Erik C
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4337750/
https://www.ncbi.nlm.nih.gov/pubmed/25709821
http://dx.doi.org/10.1186/2051-3933-1-7
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author Farmer, Nicholas A
Ault, Jerald S
Smith, Steven G
Franklin, Erik C
author_facet Farmer, Nicholas A
Ault, Jerald S
Smith, Steven G
Franklin, Erik C
author_sort Farmer, Nicholas A
collection PubMed
description BACKGROUND: Arrays of passive receivers are a widely used tool for tracking the movements of acoustically-tagged fish in marine ecosystems; however, the spatial and temporal heterogeneity of coral reef environments pose challenges for the interpretation of tag detection data. To improve this situation for reef fishes, we introduced a novel response variable method that treats signal detections as proportions (i.e., percent transmissions detected or “detection rates”) and compared this against prior approaches to examine the influence of array and transmitter performance, signal distance and environmental factors on detection rates. We applied this method to tagged snappers and groupers in the Florida reef ecosystem and controlled range-tests on static targets in Bayboro Harbor, Florida, to provide methodological guidance for the planning and evaluation of passive array studies for coral reef fishes. RESULTS: Logistic regression analysis indicated detection rates were primarily a non-linear function of tag distance from receiver. A ‘model-weighted’ function was developed to incorporate the non-linear relationship between detection rate and distance to provide robust positioning estimates and allow for easy extension to tags with different ping rates. CONCLUSIONS: Optimal acoustic array design requires balancing the interplay between receiver spacing, detection rates, and positioning error. Spacing receivers at twice the distance of the modeled 50% detection rate may be appropriate when quantification of overall space use is a priority, and would provide a minimum of 75% detection rate. However, for research where missing detections within the array is unacceptable or time-at-arrival based fine-scale positioning is needed, tighter receiver spacing may be required to maintain signal detection probability near 100%.
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spelling pubmed-43377502015-02-24 Methods for assessment of short-term coral reef fish movements within an acoustic array Farmer, Nicholas A Ault, Jerald S Smith, Steven G Franklin, Erik C Mov Ecol Methodology Article BACKGROUND: Arrays of passive receivers are a widely used tool for tracking the movements of acoustically-tagged fish in marine ecosystems; however, the spatial and temporal heterogeneity of coral reef environments pose challenges for the interpretation of tag detection data. To improve this situation for reef fishes, we introduced a novel response variable method that treats signal detections as proportions (i.e., percent transmissions detected or “detection rates”) and compared this against prior approaches to examine the influence of array and transmitter performance, signal distance and environmental factors on detection rates. We applied this method to tagged snappers and groupers in the Florida reef ecosystem and controlled range-tests on static targets in Bayboro Harbor, Florida, to provide methodological guidance for the planning and evaluation of passive array studies for coral reef fishes. RESULTS: Logistic regression analysis indicated detection rates were primarily a non-linear function of tag distance from receiver. A ‘model-weighted’ function was developed to incorporate the non-linear relationship between detection rate and distance to provide robust positioning estimates and allow for easy extension to tags with different ping rates. CONCLUSIONS: Optimal acoustic array design requires balancing the interplay between receiver spacing, detection rates, and positioning error. Spacing receivers at twice the distance of the modeled 50% detection rate may be appropriate when quantification of overall space use is a priority, and would provide a minimum of 75% detection rate. However, for research where missing detections within the array is unacceptable or time-at-arrival based fine-scale positioning is needed, tighter receiver spacing may be required to maintain signal detection probability near 100%. BioMed Central 2013-09-02 /pmc/articles/PMC4337750/ /pubmed/25709821 http://dx.doi.org/10.1186/2051-3933-1-7 Text en © Farmer et al.; licensee BioMed Central Ltd. 2013 This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Methodology Article
Farmer, Nicholas A
Ault, Jerald S
Smith, Steven G
Franklin, Erik C
Methods for assessment of short-term coral reef fish movements within an acoustic array
title Methods for assessment of short-term coral reef fish movements within an acoustic array
title_full Methods for assessment of short-term coral reef fish movements within an acoustic array
title_fullStr Methods for assessment of short-term coral reef fish movements within an acoustic array
title_full_unstemmed Methods for assessment of short-term coral reef fish movements within an acoustic array
title_short Methods for assessment of short-term coral reef fish movements within an acoustic array
title_sort methods for assessment of short-term coral reef fish movements within an acoustic array
topic Methodology Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4337750/
https://www.ncbi.nlm.nih.gov/pubmed/25709821
http://dx.doi.org/10.1186/2051-3933-1-7
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