Results 71 to 80 of about 9,839 (266)

A scalable transfer learning workflow for extracting biological and behavioural insights from forest elephant vocalizations

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Animal vocalizations encode rich biological information, making bioacoustic analysis a valuable non‐invasive tool for assessing animal welfare and population dynamics. However, traditional methods relying on manual feature selection are labour‐intensive, subjective and lack scalability for the large datasets generated by passive acoustic monitoring ...
Alastair Pickering   +3 more
wiley   +1 more source

A workflow for the automated detection and classification of female gibbon calls from long-term acoustic recordings

open access: yesFrontiers in Ecology and Evolution, 2023
Passive acoustic monitoring (PAM) allows for the study of vocal animals on temporal and spatial scales difficult to achieve using only human observers. Recent improvements in recording technology, data storage, and battery capacity have led to increased ...
Dena J. Clink   +3 more
doaj   +1 more source

Deep Machine Learning Techniques for the Detection and Classification of Sperm Whale Bioacoustics

open access: yesScientific Reports, 2019
We implemented Machine Learning (ML) techniques to advance the study of sperm whale (Physeter macrocephalus) bioacoustics. This entailed employing Convolutional Neural Networks (CNNs) to construct an echolocation click detector designed to classify ...
P. Bermant   +4 more
semanticscholar   +1 more source

Consistent and scalable monitoring of birds and habitats along a coffee production intensity gradient

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Birds are commonly used as indicators of the effect of habitat degradation on biodiversity in the tropics. However, monitoring birds and their habitat in a way that is consistent, reliable and scalable remains an important challenge. Here, we examine whether bioacoustics and remote sensing can be used to efficiently monitor avian biodiversity and ...
Marius Somveille   +10 more
wiley   +1 more source

Spraying drones: efficacy of integrating an avian repellent with drone hazing to elicit blackbird flock dispersal and abandonment of sunflower fields

open access: yesWildlife Biology, EarlyView.
Multiple management strategies exist to combat bird damage to agriculture. We explored combining two tools, drones as frightening devices and an avian repellent, to assess effectiveness of an integrated method to deter large flocks on complex landscapes. We evaluated the ability of a spraying drone (DJI Agras MG‐1P) deploying Avian Control (i.e. active
Jessica L. Duttenhefner   +2 more
wiley   +1 more source

The role of freshwater bioacoustics in ecological research

open access: yesWIREs Water, 2020
Conventional methodologies used to estimate biodiversity in freshwater ecosystems can be nonselective and invasive, sometimes leading to capture and potential injury of vulnerable species.
Jack A. Greenhalgh   +3 more
semanticscholar   +1 more source

Vocal amplitude corresponds to emergence counts in urban bat bridge roosts

open access: yesWildlife Society Bulletin, EarlyView.
In this study, we assessed the relationship between Mexican free‐tailed bat (Tadarida brasiliensis) abundance and the amplitude of their vocalizations at two urban bridges in Tucson, AZ, USA. We found a strong positive relationship between amplitudes of vocalizations and bat abundance, and reciprocal cross‐validation indicated that a model from one ...
Julia Laurenzi   +2 more
wiley   +1 more source

Individual asymmetric competition responses across multidimensional niches may enable coexistence of closely related species

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Many studies have focussed on niche differentiation at the population level to explain the coexistence of similar species. However, information on how individual‐level processes across multidimensional niches shape community dynamics and species coexistence, especially ...
Man Si   +8 more
wiley   +1 more source

Implications of target signal choice in passive acoustic monitoring: an example of age‐ and sex‐dependent vocal repertoire use in African forest elephants (Loxodonta cyclotis)

open access: yesRemote Sensing in Ecology and Conservation
Passive acoustic monitoring (PAM) is an effective remote sensing approach for sampling acoustically active animal species and is particularly useful for elusive, visually cryptic species inhabiting remote or inaccessible habitats.
Colin R. Swider   +3 more
doaj   +1 more source

Allometric Constraint Predominates Over the Acoustic Adaptation Hypothesis in a Radiation of Neotropical Treefrogs

open access: yesIntegrative Zoology, EarlyView.
Male frogs emit calls to attract mates and deter conspecific rivals. The evolution of these calls is thought to be linked to anatomical constraints and the acoustic characteristics of their surroundings. We tested these two factors in a radiation of 112 species of Neotropical treefrogs and found that body size and calling site affect peak frequency but
Moisés Escalona   +17 more
wiley   +1 more source

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