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• W2902103687 abstract "Obtaining sufficient numbers of detections during point counts to make inferences concerning the presence and abundance of secretive species, such as many species of marsh birds, can be difficult. However, autonomous recording units (ARUs) can provide extended survey windows, potentially allowing for more effective detection of elusive species. We assessed the feasibility of using both ARUs and point-count surveys to monitor Black Rails (Laterallus jamaicensis) and Least Bitterns (Ixobrychus exilis), two secretive marsh birds of conservation concern. We identified vocalizations in ARU recordings using acoustic analysis software, and combined these observations with those from point counts to model occupancy of both species in coastal marshes of eastern North Carolina in 2016 and 2017 while accounting for variation in detection. Use of ARUs doubled the number of points where we detected Black Rails; thus, the combined point count-ARU model yielded a greater occupancy probability for this species. However, the ARUs recorded few Least Bittern vocalizations, suggesting that successful application of ARUs may depend on the vocal complexity of focal species. Although the appropriateness of integrating ARUs with in-person monitoring varies among species, our results illustrate that this integration increased detections of an elusive species of conservation concern. La obtención de una cantidad suficiente de detecciones durante conteos por puntos, que permita hacer inferencias sobre la presencia y abundancia de especies sigilosas, como muchas especies de aves de pantano, puede ser difícil. Sin embargo, el uso de unidades autónomas de grabación (ARUs) puede ampliar estas oportunidades durante reconocimientos de campo, permitiendo potencialmente una detección más efectiva de especies elusivas. Determinamos la factibilidad de uso de ARUs y reconocimientos por medio de conteos por puntos para registrar rascones (Laterallus jamaicensis) y avetoros (Ixobrychus exilis), dos aves de pantano sigilosas con estatus de conservación preocupante. Identificamos vocalizaciones en grabaciones con ARUs utilizando software de análisis acústico y combinamos estas observaciones con aquellas de conteos por puntos para modelar la ocupación de ambas especies en los pantanos costeros del este de North Carolina en 2016 y 2017 mientras contabilizábamos la variación de su detección. El uso de las ARUs duplicó el número de puntos donde detectamos a Laterallus jamaicensis, con lo que el modelo conteo por punto-ARU generó una probabilidad de ocupación mayor para esta especie. Sin embargo, las ARUs grabaron pocas vocalizaciones de Ixobrychus exilis, lo que sugiere que el uso exitoso de ARUs podría depender de la complejidad vocal de la especie focal. Aunque la pertinencia de integrar ARUs con registros hechos en persona varía entre especies, nuestros resultados ilustran que dicha integración incrementa las detecciones de una especie elusiva cuya conservación es preocupante. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article." @default.
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• W2902103687 date "2018-11-25" @default.
• W2902103687 modified "2023-09-27" @default.
• W2902103687 title "Use of autonomous recording units increased detection of a secretive marsh bird" @default.
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• W2902103687 doi "https://doi.org/10.1111/jofo.12274" @default.
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