Marine Mammal Science最新文献

{"title":"Killer whale vocalizations and presence in the Beaufort Sea","authors":"Hannah L. Sawyer, Angela R. Szesciorka, John J. Citta, Brynn M. Kimber, Kathleen M. Stafford","doi":"10.1111/mms.13209","DOIUrl":"https://doi.org/10.1111/mms.13209","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acoustic richness and composition changes of humpback whale (Megaptera novaeangliae) songs on breeding grounds off the coast of Ecuador","authors":"Javier Oña,&nbsp;Judith Denkinger,&nbsp;Elena Schall","doi":"10.1111/mms.13208","DOIUrl":"https://doi.org/10.1111/mms.13208","url":null,"abstract":"<p>Song evolution and revolution events recorded through time are typical cultural features for humpback whale (<i>Megaptera novaeangliae</i>) populations worldwide. However, it is unknown if song dynamics are equivalent among subpopulations or breeding stocks of the South Pacific Ocean. To contribute to the understanding of the temporal song dynamics of humpback whale song off the coast of Ecuador, we analyzed acoustic richness and repertoire composition based on unit, phrase, and song composition over consecutive breeding seasons from 2012 to 2019. We observed incomplete song revolutions (all themes were replaced except one) and a nonsignificant variation in the acoustic richness during the study period. Our results show that over the years, humpback whale singers incorporate acoustic material from different subpopulations such as Central South Pacific (French Polynesia) and western South Atlantic (Brazil) into their song repertoire. The temporal acoustic contact of different subpopulations migrating through the eastern South Pacific may be reflected in their particular acoustic richness and temporal evolution. Off the coast of Ecuador, humpback whale song patterns point towards an alternative scenario of song evolution, indicating how cultural transmission among subpopulations can alter the song patterns in specific breeding grounds due lack of geographical barriers surrounding the southeastern Pacific region.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Allocation and use of body energy reservoirs in striped dolphins and Blainville's beaked whales: Snowball effect in negative energetic balance","authors":"Yara Bernaldo de Quirós,&nbsp;Marina Arregui,&nbsp;Manuel Arbelo,&nbsp;Ayoze Castro-Alonso,&nbsp;Nakita Câmara,&nbsp;Zachary S. Clayton,&nbsp;Francesco M. A. Consoli,&nbsp;Andreas Fahlman,&nbsp;Martina Palomino-Schätzlein,&nbsp;Raquel Puig-Lozano,&nbsp;Miguel A. Rivero,&nbsp;Eva Sierra,&nbsp;Cristian M. Suárez-Santana,&nbsp;Marisa Tejedor,&nbsp;Antonio Fernández","doi":"10.1111/mms.13200","DOIUrl":"https://doi.org/10.1111/mms.13200","url":null,"abstract":"<p>Climate change, overfishing, and other anthropogenic activities can negatively impact the energetic balance and body condition of cetaceans. Still, cetaceans must meet their energetic demands for survival, which are more expensive to maintain in the marine environment. The resilience of cetaceans to negative energy balance periods is unknown. We analyzed where striped dolphins, a medium-sized dolphin with shallow-intermediate diving habits, and Blainville's beaked whales, a larger odontocete with an extreme diving profile, store their energy reserves and how they use that energy. We performed dissections of body mass compartments of fresh dead adults of similar total body lengths but different body masses, determined the lipid and protein content of blubber and muscle, and calculated oxygen stores and the aerobic dive limit. Proteins in muscle were the largest source of energy stores for both species, followed by lipids in the blubber and muscle. Both species catabolized blubber and muscle simultaneously when losing body mass to avoid impairing other important functions. When these functions are impaired, a cascade of increased field metabolic rate and decreased energy intake may occur, decreasing their resilience to environmental challenges and making them more susceptible to diseases, ultimately resulting in death by starvation.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13200","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shepherd's beaked whale (Tasmacetus shepherdi) produces a diverse variety of ultrasonic pulses","authors":"Stephen M. Dawson,&nbsp;Jay Barlow,&nbsp;Marta Guerra,&nbsp;Eva. M. Leunissen,&nbsp;Trudi A. Webster,&nbsp;William J. Rayment","doi":"10.1111/mms.13199","DOIUrl":"https://doi.org/10.1111/mms.13199","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The French connection: Multiple records of Strait of Gibraltar killer whales (Orcinus orca) (2003–2023) in the Bay of Biscay, France","authors":"Victoria Pouey-Santalou,&nbsp;Paula Moreno-Godoy,&nbsp;Mathieu Ducret,&nbsp;Maéva Dramet,&nbsp;Aurore Toulot,&nbsp;Ida Eriksson,&nbsp;Joëlle De Weerdt","doi":"10.1111/mms.13207","DOIUrl":"https://doi.org/10.1111/mms.13207","url":null,"abstract":"<p>Documenting species occurrence and distribution patterns is fundamental for effective conservation strategies, particularly for endangered species facing various threats. Killer whales (<i>Orcinus orca</i>) are distributed worldwide, yet some populations, such as the critically endangered Strait of Gibraltar subpopulation, lack comprehensive distribution data. This study focuses on documenting the occurrence of Strait of Gibraltar killer whales along the French coast of the Bay of Biscay using twenty years (2003–2023) of scientific and citizen science data. Analysis of 34 sightings revealed seasonal patterns, with most sightings occurring between June and November. Also, killer whales are observed more often in the area since 2015. Photo-identification methods allowed for the identification of 11 individuals, eight of which were recaptured in Spanish and Portuguese catalogs, confirming their affiliation with the Strait of Gibraltar subpopulation. Some individuals have been sighted over several years, regularly travelling together, suggesting potential site fidelity to the Bay of Biscay. Overall movement patterns showed associations with Atlantic bluefin tuna distribution. However, disruptive behaviors observed in some individuals highlight conservation challenges. This study provides novel insights into the distribution and movements of a critically endangered killer whale subpopulation, informing future conservation efforts in the region.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acoustic occurrence of deep-diving cetaceans in the southern Adriatic Sea","authors":"Alexandra N. Constaratas,&nbsp;Draško Holcer,&nbsp;Özlem Özgöbek,&nbsp;Ana Širović","doi":"10.1111/mms.13204","DOIUrl":"https://doi.org/10.1111/mms.13204","url":null,"abstract":"<p>Goose-beaked whale (<i>Ziphius cavirostris</i>) and sperm whale (<i>Physeter macrocephalus</i>) are two deep-diving odontocete species known to occur in the southern Adriatic Sea, based on intermittent stranding and sighting data. To get a better understanding of their presence in this region, we studied the occurrence of echolocation clicks produced by these species in passive acoustic recordings. Passive acoustic data were collected offshore Dubrovnik, Croatia. Data were collected from October 2018 to December 2019 and from June 2020 to December 2020 using a High-frequency Acoustic Recording Package (HARP) deployed at approximately 1,000 m depth. To determine the occurrence of echolocation clicks, a two-step process was used: automated detection followed by manual annotation of the detected clicks. Automated detection was implemented using a low signal-to-noise ratio threshold and a broad range of parameters to detect as many clicks as possible. Two click clustering algorithms were evaluated for performance on this data set: an unsupervised clustering algorithm and a filtering algorithm. The performance of the algorithms was compared to the manual annotations to determine a time-effective method for future monitoring. Both species were found to be acoustically active in the southern Adriatic Sea. Goose-beaked whales were detected throughout the recording period, with echolocation clicks peaking during the winter of 2018–2019 and in the spring of 2019. Conversely, sperm whales were more acoustically active during short, irregular windows, mostly during the summer of 2019. These results suggest that goose-beaked whales are residents, and, due to the irregularity of their detection, sperm whales are likely occasional visitors to this region. The unsupervised clustering algorithm performed better than the tested filtering algorithm, with F-scores of 0.74 and 0.46, respectively. This study provides knowledge that can help with effective conservation efforts and further contribute to our understanding of cetacean occurrence in the region.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measuring steroid hormone levels in the skin of free-ranging dugongs: A less invasive way to determine reproductive status","authors":"Laetitia I. Smoll,&nbsp;Tamara Keeley,&nbsp;Elizabeth A. Burgess,&nbsp;Janet M. Lanyon","doi":"10.1111/mms.13206","DOIUrl":"https://doi.org/10.1111/mms.13206","url":null,"abstract":"<p>Monitoring hormone concentrations in marine mammals provides valuable information regarding reproductive status and health. Skin is potentially useful for measuring hormone levels and can often be collected without capture. We investigated whether progesterone, testosterone, and cortisol could be measured in skin from dugongs using enzyme immunoassays. Hormones were measured in dorsal skin scrapings from free-ranging dugongs, including known pregnant females, nonpregnant adult females, reproductively active males, and reproductively inactive males, each identified using fecal progesterone or testosterone concentrations. Progesterone could be detected reliably in skin, with significantly higher mean progesterone concentrations (118.2 ± 6.6 ng g⁻¹) in pregnant females than all other groups (60.8 ± 4.2 ng g⁻¹). Male dugongs had higher skin testosterone concentrations than females, although testosterone levels were not detectable in some samples and could not discriminate reproductively active from inactive males. Cortisol was detectable in 8 of 40 skin samples only. Although refinement of this method is required for improved hormone recovery and additional validation is warranted, our findings demonstrate proof of concept for the use of epidermal skin samples to measure steroid hormones in dugongs and offer a method of diagnosing pregnancy in dugongs without the need for capture.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dmitry Tormosov 1937–2024","authors":"Phillip J. Clapham,&nbsp;Vladimir N. Burkanov,&nbsp;Yulia V. Ivashchenko,&nbsp;Robert L. Brownell Jr.","doi":"10.1111/mms.13205","DOIUrl":"https://doi.org/10.1111/mms.13205","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nondestructive sampling of the nasal region corresponding to an altered vomeronasal organ and incisive duct in harbor seals (Phoca vitulina)","authors":"Daisuke Kondoh,&nbsp;Wataru Tonomori,&nbsp;Jumpei Tomiyasu,&nbsp;Yuka Kaneoya,&nbsp;Shun Ikuta,&nbsp;Hayao Kobayashi,&nbsp;Mari Kobayashi","doi":"10.1111/mms.13201","DOIUrl":"https://doi.org/10.1111/mms.13201","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using acoustic monitoring to reveal nearly year-round presence of humpback whales (Megaptera novaeangliae) in the waters of southern Iceland","authors":"Carola Chicco,&nbsp;Elena Papale,&nbsp;Paul J. Wensveen,&nbsp;Xavier Mouy,&nbsp;Filipa I. P. Samarra","doi":"10.1111/mms.13198","DOIUrl":"https://doi.org/10.1111/mms.13198","url":null,"abstract":"<p>Icelandic waters are a crucial feeding ground for North Atlantic humpback whales, yet their occurrence in these subarctic waters remains underexplored. This study examined seasonal and diel patterns in humpback whale occurrence off the Vestmannaeyjar archipelago, southern Iceland, from June 2018 to May 2019, using automated acoustic detections from bottom-moored hydrophones. Vocalizations were manually categorized into social calls, song fragments, or songs. Further classification identified seven social sound types and 25 unique song units. Humpback whales were detected on 126 out of 329 recording days and were present in nearly all months except April and May. Social calls were most common in summer and fall, while song fragments and songs were prevalent in winter. No diel singing pattern was observed. These findings suggest southern Iceland serves as a vital habitat for humpback whales, acting as a feeding ground in summer and a migration stopover or overwintering site in winter. The study underscores the potential of acoustic monitoring to uncover important habitats year-round, especially when field observations are scarce, and emphasizes the need for ongoing monitoring of habitat use. Continued acoustic monitoring could provide further insights into the whales' behavioral patterns and preferences, essential for their conservation.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13198","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}