Marine Mammal Science最新文献

{"title":"An observation of potential altruism by a male northern elephant seal (Mirounga angustirostris)","authors":"Sarah G. Allen,&nbsp;Matthew J. Lau,&nbsp;Sarah A. Codde","doi":"10.1111/mms.13105","DOIUrl":"10.1111/mms.13105","url":null,"abstract":"<p>Altruism, the behavioral assistance of another in need, has ancient origins in mammalian evolution (Preston, <span>2013</span>). An individual is thought to behave altruistically when its actions result in the reduction of its own survival or reproduction to benefit the fitness and survival of another individual (Kay et al., <span>2020</span>). Allo-parenting (adoption of orphaned young), a type of altruistic behavior, is commonly reported in social birds as well as mammals (Konig, <span>1997</span>). Allo-maternal care (nonmaternal care of young) has been noted in numerous pinniped species including in both Phocidae and Otariidae (Arso Civil et al., <span>2021</span>; Gemmell, <span>2003</span>). Male altruism, though, has rarely been described in marine mammals, including pinnipeds (Acevedo-Gutierrez, <span>2009</span>). Generally, polygynous marine mammal males infrequently engage in parental care, but rather devote their time and energy to mating with many females (Berta et al., <span>2005</span>). Here, we document a novel exception to that general depiction with a possible altruistic act by an adult male northern elephant seal (<i>Mirounga angustirostris</i>) that responded to a young pup in distress at a colony at Point Reyes National Seashore, California.</p><p>Elephant seals gather annually at numerous colonies along the eastern Pacific, ranging from British Columbia south to Baja California, to give birth and suckle their young onshore (Lowry et al., <span>2014</span>). The breeding season throughout their range extends from December through March when mostly adult males and females gather onshore. The sexes are extremely sexually dimorphic, exhibiting a dominance hierarchical polygynous mating system (Le Boeuf, <span>2021</span>). Adult females are capital breeders that gather in harems onshore and remain in close proximity with pups for approximately 30 days, at which time they come into estrus, mate, and shortly thereafter depart the colony. Suckling and unweaned pups are unable to swim well, and infrequently venture into the water until they wean, though they do cool off at the tidal edge (Codde et al., <span>2016</span>). Dominant males also spend little time in the water and are mostly preoccupied with either defending their position near or attempting to mate with females. Dominant males, though, occasionally may herd or escort females arriving or departing between harems onshore and deep water to prevent subordinate males from attempting to harass or mate with them (Le Boeuf, <span>2021</span>), and both sexes will retreat to wet sand and shallow water to cool off during warm weather. Both males and females fast during the breeding season relying on stored energy reserves, with some males fasting up to 4 months, and correspondingly, experience exceptional weight loss (Deutsch et al., <span>1990</span>). Consequently, males tend to avoid energetically costly actions, especially minimizing movements unrelated to reproduction (L","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139552867","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":"Using fusion effects to decrease uncertainty in distance sampling models when collating data from different surveys","authors":"Floriane Plard,&nbsp;Hélder Araújo,&nbsp;Amaia Astarloa,&nbsp;Maite Louzao,&nbsp;Camilo Saavedra,&nbsp;José Antonio Vazquez Bonales,&nbsp;Graham John Pierce,&nbsp;Matthieu Authier","doi":"10.1111/mms.13104","DOIUrl":"10.1111/mms.13104","url":null,"abstract":"<p>Estimates of population abundance are required to study the impacts of human activities on populations and assess their conservation status. Despite considerable effort to improve data collection, uncertainty around estimates of cetacean densities can remain large. A fundamental concept underlying distance sampling is the detection function. Here we focus on reducing the uncertainty in the estimation of detection function parameters in analyses combining data sets from multiple surveys, with known effects on the precision of density estimates. We developed detection functions using infinite mixture models that can be applied on data collating multiple species and/or surveys. These models enable automatic clustering by fusing the species and surveys with similar detection functions. We present a simulation analysis of a multisurvey data set in a Bayesian framework where we demonstrated that distance sampling models including fusion effects showed lower uncertainty than classical distance sampling models. We illustrated the benefits of this new model using data of line transect surveys from the Bay of Biscay and Iberian Coast. Future estimates of abundance using conventional distance sampling models on large multispecies surveys or on data sets combining multiple surveys could benefit from this new model to provide more precise density estimates.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139496145","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":"The movement patterns and foraging resources of Atlantic walruses (Odobenus rosmarus rosmarus) in Franz Josef Land archipelago and connectivity with the Kara-Barents Sea population","authors":"Maria Solovyova,&nbsp;Anna Gebruk,&nbsp;Svetlana Artemyeva,&nbsp;Viatcheslav V. Rozhnov,&nbsp;Artyom Isachenko,&nbsp;Renata Lazareva,&nbsp;Pavel Chukmasov,&nbsp;Dmitry Glazov,&nbsp;Yulia Ermilova,&nbsp;Alexander Kokorin,&nbsp;Maria Mardashova,&nbsp;Nikolay Shabalin","doi":"10.1111/mms.13103","DOIUrl":"10.1111/mms.13103","url":null,"abstract":"<p>The Franz Josef Land population of the Atlantic walrus (<i>Odobenus rosmarus rosmarus</i>) remains one of the least studied. Here, 26 walruses were tagged with satellite-linked radio transmitters in Franz Josef Land archipelago and Victoria Island in summer-autumn 2020 and 2021 to assess movements patterns and area utilization. In addition, 65 grab samples were taken to evaluate macrobenthic foraging resources. The mean duration of data records was 53 ± 27 days. The walruses traveled on average 29 ± 13.5 km/day with a mean speed of 1.2 ± 0.6 km/hr. The travel speed and distance were statistically different for male, female, and immature walruses. The individuals tagged on Victoria Island remained in the vicinity of the island, while walruses tagged within the Franz Josef Land archipelago moved between the islands, utilizing the entire area for foraging trips. One walrus migrated from Franz Josef Land to Novaya Zemlya in late November, providing evidence of connectivity with the Kara-Barents Sea population. The area was characterized by high average biomass of macrobenthos. Bivalve mollusks, <i>Hiatella arctica</i>, were dominating macrobenthic biomass, likely being the main foraging resource for the walruses. Further observations are needed to better understand winter behaviors of Franz Josef Land walruses and possible impacts of climate change on movement patterns.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13103","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476465","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":"Intraguild predation in pinnipeds: Southern sea lions prey upon adult female South American fur seals in the Falkland Islands","authors":"Alastair M. M. Baylis,&nbsp;Kayleigh A. Jones,&nbsp;Rachael A. Orben","doi":"10.1111/mms.13098","DOIUrl":"10.1111/mms.13098","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139145607","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":"Amino acid-specific nitrogen stable isotope analysis reveals the trophic behavior of Icelandic fin whales in winter and suggests variable feeding strategies","authors":"Diego Rita,&nbsp;Asunción Borrell,&nbsp;Dirk Wodarg,&nbsp;Gísli Víkingsson,&nbsp;Raquel García-Vernet,&nbsp;Alex Aguilar,&nbsp;Natalie Loick-Wilde","doi":"10.1111/mms.13097","DOIUrl":"10.1111/mms.13097","url":null,"abstract":"<p>Fin whales (<i>Balaenoptera physalus</i>) aggregate west of Iceland during summer, where they feed mostly on krill, but their winter distribution is poorly known. This study investigates the winter behavior of fin whales that summer off Iceland by analyzing amino acid-specific nitrogen isotope ratios in the baleen plates. This technique is increasingly used in large marine vertebrates to discriminate between changes in trophic position and changes in isotopic baseline levels, while ruling out the effect of fasting on these patterns. Analyses were conducted on samples extracted from two baleen plate segments: one corresponding to winter, another to summer. The trophic position was higher and slightly more variable in winter (3.6 ± 0.7) than in summer (3.0 ± 0.4), which indicates that during winter fin whales tend to feed on fish and are more generalist in feeding habits. Interestingly, the δ¹⁵N_Phe values were not lower in winter than in summer (winter: 5.2‰ ± 2.4‰; summer: 4.0‰ ± 2.1‰). This was unexpected because baseline δ¹⁵N values (e.g., zooplankton) tend to be lower at low latitudes, where fin whales are believed to spend the winter. Fin whales may remain in relatively high latitudes during winter or visit low-latitude areas with locally higher than average δ¹⁵N values, such as upwelling areas.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13097","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139034890","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":"Catastrophic mortality of southern elephant seals caused by H5N1 avian influenza","authors":"Claudio Campagna,&nbsp;Marcela Uhart,&nbsp;Valeria Falabella,&nbsp;Julieta Campagna,&nbsp;Victoria Zavattieri,&nbsp;Ralph E. T. Vanstreels,&nbsp;Mirtha N. Lewis","doi":"10.1111/mms.13101","DOIUrl":"10.1111/mms.13101","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139158679","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":"Michael F. Tillman 1943–2023","authors":"Robert L. Brownell Jr,&nbsp;Linda L. Jones,&nbsp;Douglas P. DeMaster,&nbsp;Greg P. Donovan,&nbsp;Stephen B. Reilly,&nbsp;Rolland A. Schmitten,&nbsp;Jeffrey M. Breiwick,&nbsp;Robert Suydam,&nbsp;Daryl J. Boness,&nbsp;William W. Fox Jr.","doi":"10.1111/mms.13100","DOIUrl":"10.1111/mms.13100","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139158461","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":"Sea Mammals: The Past and Present Lives of Our Oceans' Cornerstone Species By Annalisa Berta. Princeton University Press. 2023. 224 pp. ISBN 978–0–691-23664-3, US$29.95 (Hardcover); ISBN 978–0–691-24338-2, US$20.97 (eBook)","authors":"Oliver Hampe","doi":"10.1111/mms.13102","DOIUrl":"10.1111/mms.13102","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138947230","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":"Geographic variation in simple contact calls of Canadian beluga whales (Delphinapterus leucas)","authors":"Karyn V. Booy,&nbsp;Valeria Vergara,&nbsp;Lisa Loseto,&nbsp;Marie-Ana Mikus,&nbsp;Marianne Marcoux","doi":"10.1111/mms.13095","DOIUrl":"10.1111/mms.13095","url":null,"abstract":"<p>Beluga whales, <i>Delphinapterus leucas</i>, are a highly social species with a complex and diverse vocal repertoire. Although extensively studied and classified, to date few attempts have been made to examine geographic variation in their calls. In this study, we examined geographic variation in simple contact calls (SCCs), specifically those that consist only of broadband pulsed trains, among four Canadian beluga populations from the Eastern Beaufort Sea (EBS), the Eastern High Arctic-Baffin Bay, St. Lawrence Estuary (SLE), and the Western Hudson Bay. Five acoustic parameters were measured for each call and compared among populations using multivariate discriminant analysis. Results of our study indicate that there is a degree of variation in SCCs among these four populations, with the most geographically distant populations of the SLE and EBS displaying the greatest degrees of dissimilarity in SCC structure relative to geographically closer populations. Further, these results align with genetic variation of Canadian beluga populations previously described in the literature. This study is the first descriptive population comparison of SCCs for beluga and establishes a baseline for continued work into this developing area of research.</p>","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mms.13095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139034949","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":"First aerial observation of Sato's beaked whales (Berardius minimus) above the Abashiri Submarine Canyon, Hokkaido, Japan","authors":"Hayao Kobayashi,&nbsp;Shun Ikuta,&nbsp;Mari Kobayashi","doi":"10.1111/mms.13099","DOIUrl":"10.1111/mms.13099","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138946107","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}