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Tetsuya Endo, Osamu Kimura, Masaru Terasaki, Yoshihisa Kato, Yukiko Fujii and Koichi Haraguchi
The changes in the stable isotope ratios of carbon (d13C), nitrogen (d15N), oxygen (d18O), and mercury (Hg) concentrations in muscle and liver tissues during and after lactation were studied in killer whales stranded along the coast of Hokkaido, in the n...
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Xiaoyu Huang, Mingming Liu, Samuel T. Turvey, Mingli Lin and Songhai Li
Marine mammals are a diverse group of aquatic animals that exhibit wide variation in body size, living conditions, breeding habitat, social behaviour and phylogeny. Although case studies about prenatal investment in cetaceans and pinnipeds have been inve...
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Jan-Olaf Meynecke and Hilla Kela
The use of objects by cetaceans is well known, and their ability to interact with their environment in complex behaviours has been demonstrated previously. However, baleen whales, including humpback whales (Megaptera novaeangliae), are less often observe...
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Jan-Olaf Meynecke, Johan Gustafon and David E. Cade
Cetaceans are known for their intelligence and display of complex behaviours including object use. For example, bowhead whales (Balaena mysticetus) are known to rub on rocks and some humpback whale (Megaptera novaeangliae) populations undertake lateral b...
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Alfonso Langle-Flores, Zinthia López-Vázquez, Rosa María Chávez Dagostino and Adriana Aguilar-Rodríguez
Humpback whales face emerging anthropogenic challenges such as entanglement in abandoned fishing gear and stranding during their winter migration. Such challenges require collective action solutions involving diverse stakeholders across jurisdictions, so...
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Ruixuan He, Xinjing Wang, Jian Li, Xiaodong Liu and Baowei Song
Recently, inspired by the flippers of humpback whales, researchers have been widely studying leading-edge tubercles for use as passive flow control devices. In this research, we numerically investigated the effects of leading-edge tubercles on a three-di...
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Helena Costa, Andrew Rogan, Christopher Zadra, Oddbjørn Larsen, Audun H. Rikardsen and Courtney Waugh
Analysis of cetacean blow offers a unique potential for non-invasive assessments of their health. In recent years, the use of uncrewed aerial vehicles (UAVs) has revolutionized the way these samples are collected. However, the high cost and expertise ass...
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Virginia Sciacca, Giuseppe Morello, Laura Beranzoli, Davide Embriaco, Francesco Filiciotto, Giuditta Marinaro, Giorgio Maria Riccobene, Francesco Simeone and Salvatore Viola
The Mediterranean fin whale emits two types of 20-Hz calls, known as ?classic? and ?backbeat?, that can be produced in irregular series or in patterned sequences called songs. The analysis of songs is recognized as a meaningful approach to study baleen w...
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Rianna Burnham, Svein Vagle, Peter Van Buren and Christie Morrison
The spatial extent of a dual-frequency echosounder and its potential impact on cetacean species were examined. Sound emissions of output frequencies of 83 kHz and 200 kHz were tested at a maximum distance of 400 m. This is the minimum vessel approach dis...
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Laura Redaelli, Sari Mangia Woods, Rafaela Landea and Laela Sayigh
To learn more about the occurrence and behaviour of a recently discovered population of blue whales, passive acoustic data were collected between January 2012 and April 2013 in the Chiloense ecoregion of southern Chile. Automatic detectors and manual aud...
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