Article
Ecology
Marcelo Araya-Salas, Grace Smith-Vidaurre, Gloriana Chaverri, Juan C. Brenes, Fabiola Chirino, Jorge Elizondo-Calvo, Alejandro Rico-Guevara
Summary: Animal acoustic signals are widely used for research purposes due to their ease of registration and versatility. However, analyzing the large datasets generated by bioacoustics research can be challenging. The ohun R package aims to aid in automated sound event detection and evaluation, providing tools to optimize detection routines and compare performance among different approaches.
METHODS IN ECOLOGY AND EVOLUTION
(2023)
Article
Multidisciplinary Sciences
Marlen Froehlich, Natasha Bartolotta, Caroline Fryns, Colin Wagner, Laurene Momon, Marvin Jaffrezic, Tatang Mitra Setia, Caroline Schuppli, Maria A. van Noordwijk, Carel P. van Schaik
Summary: The study found that orangutans show more communicative behaviors in captive environments, both at the individual and population levels, and in more sociable species, the use of specific signals is also higher in captive settings. This suggests that orangutans exhibit behavioral plasticity when faced with different environments.
Article
Zoology
C. H. Batist, M. N. Razafindraibe, F. Randriamanantena, A. L. Baden
Summary: This study focused on the vocalizations of wild black-and-white ruffed lemurs, finding that calling rates remained consistent throughout the day but decreased with high rainfall. Sex- and subgroup-specific differences in call usage were identified as important factors affecting vocal communication.
Article
Biodiversity Conservation
Leila Siciliano-Martina, Jessica E. Light, A. Michelle Lawing
Summary: Research shows that captive canid populations, including both hypercarnivores and hypocarnivores, exhibit cranial shape changes, especially among hypercarnivorous species. These changes may affect the animals' ability to hunt and eat, potentially hindering their reintroduction success in the future.
BIOLOGICAL CONSERVATION
(2021)
Article
Zoology
Kangkang Zhang, Tong Liu, Shengjing Song, Xin Zhao, Shijun Sun, Walter Metzner, Jiang Feng, Ying Liu
Summary: This study introduces a bi-directional long short-term memory network to separate overlapping echolocation-communication calls of different bat species and reconstruct waveforms. The results show the reliability and effectiveness of separating and reconstructing calls through parameter comparisons and clustering analysis.
INTEGRATIVE ZOOLOGY
(2022)
Article
Biodiversity Conservation
Samantha Muka, Chris Zarpentine
Summary: In recent decades, there has been a growing opposition to cetacean captivity among the general public, but discussions often overlook the relationship between captivity and conservation. Approaches in conservation biology such as compassionate conservation and multispecies justice call for more attention to the impact of conservation interventions on individual nonhuman animals. Some forms of captivity may be ethically justified as part of in situ conservation efforts, even if they involve risks to individual cetaceans.
BIOLOGICAL CONSERVATION
(2021)
Article
Behavioral Sciences
Anne C. Sabol, Alison L. Greggor, Bryce Masuda, Ronald R. Swaisgood
Summary: Vocal communication plays a crucial role in animals' social interactions and survival. However, under human care, the structure of vocal behavior and responses towards it can be altered. This study tested if the endangered 'alala retained their natural responses to species-specific vocal calls. The results showed that 'alala exhibited relevant behaviors, but individual responses varied, suggesting the importance of considering animals' responses to vocal stimuli in determining their release suitability.
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
(2022)
Article
Biology
Ross Crates, Naomi Langmore, Louis Ranjard, Dejan Stojanovic, Laura Rayner, Dean Ingwersen, Robert Heinsohn
Summary: This study found that a severe decline in population density is associated with the loss of vocal culture in a wild animal, with concomitant fitness costs for remaining individuals. The decline in song complexity of regent honeyeater further supports the impact of population decline on cultural loss in this species.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Ecology
Daniella Teixeira, Simon Linke, Richard Hill, Martine Maron, J. Berndt van Rensburg
Summary: Ecologists are using bioacoustics and autonomous sound recorders to monitor wildlife. However, post-processing of sound files to extract relevant data remains a challenge. This study tested the performance of open-source call recognizers for nest monitoring in two endangered subspecies of black-cockatoo and found that bioacoustics combined with semi-automated post-processing can be an appropriate tool for monitoring these subspecies.
ECOLOGICAL INFORMATICS
(2022)
Article
Biodiversity Conservation
Benjamin Cretois, Ian Avery Bick, Cathleen Balantic, Femke B. Gelderblom, Diego Pavon-Jordan, Julia Wiel, Sarab S. Sethi, Davyd H. Betchkal, Ben Banet, Carolyn M. Rosten, Tor Arne Reinen
Summary: Noise pollution poses a significant threat to ecosystems, and this study focuses on the impact of snowmobile noise on avian vocalizations. The research findings reveal that snowmobile noise leads to a decrease in bird vocalizations, but also highlight the resilience of avian communities. The study emphasizes the need to consider noise impacts in the non-breeding season and provides valuable insights for protecting critical avian habitats.
JOURNAL OF APPLIED ECOLOGY
(2023)
Article
Ecology
Stavros Ntalampiras, Luca A. Ludovico, Giorgio Presti, Mael Vittorio Vena, Davide Fantini, Tyfenn Ogel, Stefania Celozzi, Monica Battini, Silvana Mattiello
Summary: This study presents the design and implementation of a wireless acoustic sensor network for continuous monitoring of goat farms. A hierarchical organization of involved sound classes is defined, covering all aspects of goat vocalizations. An annotation tool tailored to the real-world data environment is developed to assist in goat vocalization annotation. A mobile phone application is also developed for remote access to farm site information. The non-invasive monitoring framework is implemented in 4 different sites in Northern Italy, considering their diverse characteristics.
ECOLOGICAL INFORMATICS
(2023)
Article
Agriculture, Dairy & Animal Science
Sebastian Schneider, Kurt Hammerschmidt, Paul Wilhelm Dierkes
Summary: Unsupervised clustering algorithms are widely used in ecology and conservation to classify animal sounds, but also offer several advantages in basic bioacoustics research. Overcoming existing challenges is important, especially with frequency-modulated vocalizations. The software CASE is presented in this paper, which includes various clustering methods and a multidimensional feature-extraction method to achieve better clustering results.
Article
Fisheries
Mohammad Asmat-Ullah, Khor Waiho, Mohamad N. Azra, Mohd Husin Norainy, Muhammad Nur Syafaat, Sk Ahmad Al Nahid, Hanafiah Fazhan, Mhd Ikhwanuddin
Summary: The development of induced mating technique for orange mud crabs in captivity achieved a mating success rate of 83.33 +/- 5.77%, which can support the increase in hatchery-produced mud crab seeds and be applied in future breeding and hybridization trials.
Article
Environmental Sciences
Brian S. Miller, Susannah Calderan, Russell Leaper, Elanor J. Miller, Ana Sirovic, Kathleen M. Stafford, Elanor Bell, Michael C. Double
Summary: This study estimated the source levels of Antarctic blue and fin whale calls using acoustic recordings collected during an Antarctic voyage in 2019. The results showed that source level estimates were sensitive to the parameters used in transmission loss models, particularly the seafloor geoacoustic properties and depth of the calling whale. These estimates provide important information for understanding the detection range and communication space of these whale calls.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Ecology
Mara Thomas, Frants H. Jensen, Baptiste Averly, Vlad Demartsev, Marta B. Manser, Tim Sainburg, Marie A. Roch, Ariana Strandburg-Peshkin
Summary: This study explores the feature classification and similarity calculation of animal vocalization data using neighborhood-based dimensionality reduction of spectrograms. The results demonstrate that this method can generate meaningful latent space representations and can be applied to classify ambiguous calls and detect mislabeled calls.
JOURNAL OF ANIMAL ECOLOGY
(2022)
