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Recent Advances in Marine Bioacoustics
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Recent Advances in Marine Bioacoustics

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Biology".

Deadline for manuscript submissions: 20 December 2024 | Viewed by 1209

Special Issue Editors

Dr. Valentina Zaffaroni-Caorsi

E-Mail Website
Guest Editor
UNIMIB · Department of Earth and Environmental Sciences, Università degli Studi di Milano-Bicocca, Milan, Italy
Interests: bioacoustics; biotremology; urban noise; biodiversity; behavioral ecology
Dr. Giovanni Zambon

E-Mail Website
Guest Editor
Department of Earth and Environmental Sciences, Università degli Studi di Milano-Bicocca, Milan, Italy
Interests: soundscape in urban and natural areas; eco-acoustics; soundscape in marine habitats; noise mapping
Special Issues, Collections and Topics in MDPI journals
Dr. Roberto Benocci

E-Mail Website
Guest Editor
UNIMIB · Department of Earth and Environmental Sciences, Università degli Studi di Milano-Bicocca, Milan, Italy
Interests: soundscape in urban and natural areas; eco-acoustics; soundscape in marine habitats; noise mapping
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Anthropogenic disturbance is one of the major drivers of the marine biodiversity crisis worldwide. Among them, human-made noise (e.g., commercial shipping) reaches across much of the world’s marine landscape, leading to a substantial degradation of the acoustic environment. An increasing amount of noise in the marine environment can have major and even fatal impacts on the animals, since it interferes with their key life functions (e.g., foraging, mating, migrating). In response to this pressing issue, bioacoustic approaches emerge as valuable tools, offering insights into the effects of noise by unveiling the intricate processes underlying these ecological changes. This issue aims to showcase the latest advancements in marine bioacoustics research, encompassing new methodologies, the effectiveness of diverse approaches, and the exploration of novel habitats and species. By facilitating the exchange of research experiences and results, this issue seeks to contribute to ongoing updates in guidelines and regulations for underwater noise management and marine conservation.

Dr. Valentina Zaffaroni-Caorsi
Dr. Giovanni Zambon
Dr. Roberto Benocci
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bioacoustics
  • soundscape
  • marine
  • underwater
  • anthropogenic
  • conservation

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Published Papers (2 papers)

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Research

18 pages, 6601 KiB  
Article
Dolphin Health Classifications from Whistle Features
by Brittany Jones, Jessica Sportelli, Jeremy Karnowski, Abby McClain, David Cardoso and Maximilian Du
J. Mar. Sci. Eng. 2024, 12(12), 2158; https://doi.org/10.3390/jmse12122158 - 26 Nov 2024
Viewed by 97
Abstract
Bottlenose dolphins often conceal behavioral signs of illness until they reach an advanced stage. Motivated by the efficacy of vocal biomarkers in human health diagnostics, we utilized supervised machine learning methods to assess various model architectures’ effectiveness in classifying dolphin health status from [...] Read more.
Bottlenose dolphins often conceal behavioral signs of illness until they reach an advanced stage. Motivated by the efficacy of vocal biomarkers in human health diagnostics, we utilized supervised machine learning methods to assess various model architectures’ effectiveness in classifying dolphin health status from the acoustic features of their whistles. A gradient boosting classifier achieved a 72.3% accuracy in distinguishing between normal and abnormal health states—a significant improvement over chance (permutation test; 1000 iterations, p < 0.001). The model was trained on 30,693 whistles from 15 dolphins and the test set (15%) totaled 3612 ‘normal’ and 1775 ‘abnormal’ whistles. The classifier identified the health status of the dolphin from the whistles features with 72.3% accuracy, 73.2% recall, 56.1% precision, and a 63.5% F1 score. These findings suggest the encoding of internal health information within dolphin whistle features, with indications that the severity of illness correlates with classification accuracy, notably in its success for identifying ‘critical’ cases (94.2%). The successful development of this diagnostic tool holds promise for furnishing a passive, non-invasive, and cost-effective means for early disease detection in bottlenose dolphins. Full article
(This article belongs to the Special Issue Recent Advances in Marine Bioacoustics)
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13 pages, 4495 KiB  
Article
Acoustic Target Strengths and Swimbladder Morphology of Chub Mackerel Scomber japonicus in the Northwest Pacific Ocean
by Hyungbeen Lee, Euna Yoon, Yong Jin Choo and Jeong-Hoon Lee
J. Mar. Sci. Eng. 2024, 12(9), 1500; https://doi.org/10.3390/jmse12091500 - 1 Sep 2024
Viewed by 675
Abstract
The Northwest Pacific chub mackerel (Scomber japonicus) is one of the most productive, economically important fishery resources worldwide. Accurately assessing this species and ensuring adherence to total allowable catch limits are crucial owing to fluctuations in their abundance and distribution. Acoustic [...] Read more.
The Northwest Pacific chub mackerel (Scomber japonicus) is one of the most productive, economically important fishery resources worldwide. Accurately assessing this species and ensuring adherence to total allowable catch limits are crucial owing to fluctuations in their abundance and distribution. Acoustic target strength measurements of S. japonicus were conducted at 38, 70, and 120 kHz using a split-beam echosounder of individuals from nine size groups (mean fork length, 10.8–28.3 cm) swimming freely in a net cage within a seawater tank. An underwater camera was utilized to simultaneously measure swimming angle. Least-squares regression analysis revealed that when the slope was constrained to 20, as per the generally applicable morphometric equation, the resulting values for the constant term (b20) were −67.7, −66.6, and −67.3 dB at 38, 70, and 120 kHz, respectively. S. japonicus mean swimming angle across the groups was −10.5–9.6° (standard deviation [SD], 16.3–33.3°). Furthermore, the ratio of swimbladder height to swimbladder length, the ratio of swimbladder length to fork length, and the tilt angle of the swimbladder (mean ± SD) were 0.191 ± 0.060, 0.245 ± 0.055, and 9.6 ± 3.0°, respectively. These results can be used for the acoustic stock assessment of S. japonicus in the Northwest Pacific Ocean. Full article
(This article belongs to the Special Issue Recent Advances in Marine Bioacoustics)
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