Marine Mammal Science最新文献

{"title":"Bray calls emitted by common bottlenose dolphins (Tursiops truncatus) in offshore waters of northeastern Brazil","authors":"Alice Lima, Lara Cunha Lopes, Jéssica Fernandes de Melo, Evelyn Fróes, Rita de Cassia De Carli, Manuela Bassoi, Renata S. Sousa-Lima, Manuel E. dos Santos, Maria Isabel Carvalho Gonçalves","doi":"10.1111/mms.13160","DOIUrl":"10.1111/mms.13160","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141778724","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":"Delphinid postmortem vitreous humor biochemistry as proxy for antemortem blood analyte concentrations","authors":"Tiffany Zorotrian, Adam W. Stern, Alexander Costidis, Craig A. Harms, Hanzhi Gao, Christine Fontaine, Hayley R. Adams","doi":"10.1111/mms.13157","DOIUrl":"10.1111/mms.13157","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141614712","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":"ZMFISC: Zhu-Ming data set with a convolutional neural network for identifying Indo-Pacific humpback dolphins (Sousa chinensis)","authors":"Minghao Yang,&nbsp;Zhongrui Wu,&nbsp;Xiqing Zang,&nbsp;Changlong Jin,&nbsp;Qian Zhu","doi":"10.1111/mms.13154","DOIUrl":"10.1111/mms.13154","url":null,"abstract":"<p>The Indo-Pacific humpback dolphin (<i>Sousa chinensis</i>) is a small-toothed whale species that inhabits estuaries and shallow coastal waters from the eastern Indian Ocean to the western Pacific, and faces significant negative impacts from anthropogenic activities. The noninvasive Photo-identification method enables individual identification and abundance estimation based on natural markings of cetaceans without disrupting their natural behaviors. Currently, the identification of <i>S. chinensis</i> using photographs relies primarily on time-intensive visual recognition by experienced researchers. Through field surveys conducted in the west Huangmao Sea area from 2012 to 2021, we compiled the Zhu-Ming data set focusing on <i>S. chinensis</i> (ZMSC), consisting of 479 individuals and 5,196 photos. Utilizing the ZMSC, we proposed a Few-Shot Identification method for <i>S. chinensis</i> (FISC), which achieved 85.93% identification Top-1 accuracy. The implementation of proper preprocessing steps and data augmentation techniques has significantly enhanced the performance of FISC, while visualizing network weights has improved its interpretability. Despite the remaining challenges of data imbalance and the inability to automatically allocate new labels, ZMFISC alleviates the challenge of the current heavy reliance on time-intensive visual recognition methods by researchers for individual identification of <i>S. chinensis</i> and provide a valuable tool to enhance future conservation efforts for <i>S. chinensis</i>.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609591","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":"Distribution of Arnoux's beaked whales (Berardius arnuxii)","authors":"Bram Feij,&nbsp;Susanne Kühn,&nbsp;André Meijboom,&nbsp;Jan A. van Franeker,&nbsp;Horst Bornemann,&nbsp;Nat Kelly,&nbsp;Fokje L. Schaafsma","doi":"10.1111/mms.13158","DOIUrl":"10.1111/mms.13158","url":null,"abstract":"<p>Arnoux's beaked whales (<i>Berardius arnuxii</i>) are generally considered to be uncommon to rare, and likely to prefer deep oceanic waters of the Southern Hemisphere. During many top-predator surveys in the Southern Ocean since 1988 we did not sight the species. However, in April 2022 we encountered three groups in the marginal sea-ice zone of the Weddell Sea. This study provides detailed descriptions of the sighted animals and their environment and report on unpublished sightings of this species from 1986 to 1998. A search of published information on the distribution of the species revealed 108 documented sightings with a total of 1,125 individuals. In combination these sources of information for the Southern Ocean, suggest a frequent occurrence in ice-covered waters, often close to the continental coast and edges of fast ice and ice-shelves. North of 60°S, in the temperate regions of the Southern Hemisphere, the species was also regularly sighted near continents, even far inshore, in fjords surrounded by land.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13158","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609592","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":"Biotic and abiotic drivers of harbor seal (Phoca vitulina) fine-scale densities in the Salish Sea","authors":"Jamie L. Brusa,&nbsp;Scott F. Pearson,&nbsp;Martin G. Raphael,&nbsp;Beth Gardner","doi":"10.1111/mms.13155","DOIUrl":"10.1111/mms.13155","url":null,"abstract":"<p>Understanding relationships between environmental characteristics and variation in species occurrence and density can provide information for managing human activities, protected species, and species of commercial importance in a dynamic system. To identify environmental drivers associated with variation in harbor seal (<i>Phoca vitulina</i>) densities in the Salish Sea, Washington, we analyzed 20 years of boat-based survey data and environmental covariates using a hierarchical distance sampling model. We included spatial, temporal, and spatiotemporal environmental covariates in our model and produced fine-scale predictive maps displaying in-water estimated densities from our model results. We found that spatial covariates were the strongest predictors for harbor seal densities in the Salish Sea. Harbor seals were more abundant closer to major river mouths, near shore, in shallower waters, and in areas with more haul-out sites. Additionally, harbor seal density varied with shoreline type. Changes in predicted harbor seal spatial use of the Salish Sea varied but with little difference between breeding/molting and nonbreeding/nonmolting seasons. Our results revealed spatiotemporal variation in harbor seal fine-scale density in the Salish Sea, which are particularly important for conservation planning, as spatiotemporal variation in harbor seal density can exert heterogenous top-down effects on prey species populations, some of which are threatened.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573719","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":"In vivo viscoelastic properties of cetacean integument: an experimental characterization","authors":"Dory Y. Yang,&nbsp;K. Alex Shorter,&nbsp;Michael Moore,&nbsp;Julie Rocho-Levine,&nbsp;Randall S. Wells,&nbsp;Kira Barton,&nbsp;Mark Johnson","doi":"10.1111/mms.13153","DOIUrl":"10.1111/mms.13153","url":null,"abstract":"<p>Suction cups are commonly used to attach biologging tags to cetaceans, and interact mechanically with compliant integument, an organ primarily composed of skin and blubber. However, the impact of compliance on suction cup performance is difficult to predict because knowledge about in vivo integument mechanics is lacking. Here, an experimental approach is used to investigate the mechanical properties of common bottlenose dolphin (<i>Tursiops truncatus</i>) integument using a custom instrument, the static suction cup (SSCup), to collect data from both trained dolphins and wild individuals (<i>n</i> = 17) during a static pose. Three loading profiles were applied at three sites to quantify nonlinear stiffness, hysteresis, and creep. The site at the dorsal fin insertion exhibited the highest stiffness, while sites posterior to the blowhole and above the pectoral fin showed greater energy dissipation during cyclic loading. Viscoelastic behavior was observed across all sites. Suction cup performance on a surrogate material with broadly similar compliance showed reduced performance compared to cups on rigid acrylic: the maximum applied force at detachment on acrylic (50 N) was twice as large as the compliant substrate (25 N). Site-dependent compliance of integument may lead to varying performance of suction cups as an attachment method for tags.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13153","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573721","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":"Survival and population size of the Indo-Pacific humpback dolphins off the eastern Leizhou Peninsula","authors":"Wenzhi Lin,&nbsp;Shenglan Chen,&nbsp;Binshuai Liu,&nbsp;Ruiqiang Zheng,&nbsp;Agathe Serres,&nbsp;Mingli Lin,&nbsp;Mingming Liu,&nbsp;Songhai Li","doi":"10.1111/mms.13156","DOIUrl":"10.1111/mms.13156","url":null,"abstract":"<p>Indo-Pacific humpback dolphins form a resident population off the east coast of Leizhou Peninsula (LZP) in South China. The most recent study suggested ~1,500 individuals in this area, making this population one of only two populations of this species exceeding 1,000 individuals. However, demographic information regarding this population has been lacking since 2012. Using a 5-year (2019–2023) photo-identification data set, we examined two key demographic parameters of the LZP population, namely the apparent survival and population size, using multistate capture-recapture analyses. Annual survival probabilities (φ) changed over time, fluctuating between 0.942 and 0.961 for adults, and between 0.787 and 0.837 for juveniles. Jolly-Seber multistate model analyses resulted in highly comparable noncalf population size estimates from 2020 to 2023 (<span></span><math>\u0000 <mrow>\u0000 <mover>\u0000 <mi>N</mi>\u0000 <mo>̂</mo>\u0000 </mover>\u0000 </mrow></math>₂₀₂₀ = 479, <i>SE</i> = 28; <span></span><math>\u0000 <mrow>\u0000 <mover>\u0000 <mi>N</mi>\u0000 <mo>̂</mo>\u0000 </mover>\u0000 </mrow></math>₂₀₂₁ = 458, <i>SE</i> = 29; <span></span><math>\u0000 <mrow>\u0000 <mover>\u0000 <mi>N</mi>\u0000 <mo>̂</mo>\u0000 </mover>\u0000 </mrow></math>₂₀₂₂ = 481, <i>SE</i> = 27; <span></span><math>\u0000 <mrow>\u0000 <mover>\u0000 <mi>N</mi>\u0000 <mo>̂</mo>\u0000 </mover>\u0000 </mrow></math>₂₀₂₃ = 446, <i>SE</i> = 31). By reviewing the available demographic information, we conclude that the population size of LZP humpback dolphins has been previously overestimated. The time-dependent survivals seemingly reflect a dynamic development of anthropogenic disturbance during the pandemic period. We propose that the population status should be re-evaluated, especially in the postpandemic era when the human activities came back to “normal” levels.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577893","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":"Southern right whale behavioral changes due to interactions with whale-watching vessels: evidence-based calculations aimed at improving management policies","authors":"Magdalena Arias,&nbsp;Silvana Dans,&nbsp;Enrique A. Crespo,&nbsp;Raúl A. C. González","doi":"10.1111/mms.13149","DOIUrl":"10.1111/mms.13149","url":null,"abstract":"<p>Interactions between whale-watching vessels and cetaceans have raised questions regarding the sustainability of whale-watching. This study aimed to build a model for managing whale-watching activity. The approach involved establishing vessel-exposure thresholds based on changes in short-term behavioral responses of southern right whales in the Bahía San Antonio Marine Protected Area of Argentina. The model serves as a source of information for management decision-making in whale-watching operations, with an estimated framework for the maximum carrying capacity dictating the vessel-exposure level that can be maintained with no significant changes in the whales' activity budgets. The model, based on Markov chains, indicated that surface active behavior was the form most sensitive to the presence of tourism vessels. However, vessel exposure always remained below nonsustainability threshold, defined as the amount of time that a whale could be disturbed by vessels without significantly changing its activity budget. Therefore, the observed changes were biologically insignificant. Thus, whale watching in this area is developing with minimal impact on southern right whales. An understanding of the exposure thresholds is essential for establishing management strategies that enable sustainable whale watching. This approach is crucial for setting limits within a scenario of future growth and reducing activity when demand exceeds the carrying capacity.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573722","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":"First visual sightings and echolocation signal recordings of Blainville's beaked whales (Mesoplodon densirostris) in the northern South China Sea","authors":"Lijun Dong,&nbsp;Wenzhi Lin,&nbsp;Mingming Liu,&nbsp;Binshuai Liu,&nbsp;Shenglan Chen,&nbsp;Mingli Lin,&nbsp;Yixi Shi,&nbsp;Songhai Li","doi":"10.1111/mms.13152","DOIUrl":"10.1111/mms.13152","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141505978","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":"Respiratory reference values for bottlenose dolphins (Tursiops spp.) and its importance for conservation","authors":"Fabien Cauture,&nbsp;Jay Sweeney,&nbsp;Rae Stone,&nbsp;Andreas Fahlman","doi":"10.1111/mms.13151","DOIUrl":"10.1111/mms.13151","url":null,"abstract":"<p>Respiratory disease is one of the main causes for morbidity and mortality in cetaceans, which highlights the importance of understanding normal lung function and how it may impede homeostasis, and diving capacity. In addition, the use of breathing frequency as a proxy for metabolic rate requires a better estimate of the normal range of tidal volume, respiratory flow, and breath durations. In the current study, we use data on clinically healthy bottlenose dolphins (<i>Tursiops</i> spp<i>.</i>) collected over a decade to define how lung function varies with body mass, age, and sex while in water or during voluntary beaching. The data show that tidal volume consistently varies with body mass both during spontaneous and forced breaths both in water and while beached. Both peak expiratory and inspiratory flow varies with body mass, but also in some circumstances with sex and age. Total and inspiratory breath durations only varied with body mass during forced breaths on land. Expired tidal volume varied with both body mass and either total or expiratory breath duration. These data provide baseline for respiratory function in healthy bottlenose dolphins and suggest that either total or expiratory breath duration provide a useful proxy for tidal volume.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"41 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13151","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141505976","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}