March 2021 - MARMAM - devlists.uvic.ca

Graduate Student Symposium 2021 Abstract Submission Deadline Extended
by Lauren Clance 04 Mar '21

04 Mar '21

Hello everyone, The Dauphin Island Sea Lab (DISL) Marine Science Graduate Student Organization will be hosting a Graduate Student Symposium (GSS 2021) during the weekend of April 16th-18th! GSS is an annual conference of marine science graduate students and undergraduates who meet to present research, provide feedback, and network with others. Due to COVID-19, we have opted to hold the event virtually this year; however, this allows us to expand our range of opportunities to all grad students and undergraduates and to a wider variety of research topics, including sessions for marine mammal research, such as megafauna conservation, stable isotope, trace element and genetics work. We will be holding the event as a live virtual conference, meaning that students will present in real-time in front of virtual audiences and receive live questions and feedback. To achieve this goal, we encourage all students, faculty and staff at research institutions and members of the press and general public to join us and participate throughout the weekend. To be a presenter, you must be either a graduate student or undergraduate, but you do not have to be a student to attend. The cost to register as a student or faculty member is $45, which will include a welcome packet and t-shirt (and abstract fee if you are a student). If you are a member of the general public or a technician or researcher that is not faculty, registration is $7.50. For presenters, abstracts are now due March 19th. Included in this email is a graphic that contains session topics. Please feel free to distribute these materials to anyone that may be interested. Registration forms can be accessed at our conference website: https://whova.com/web/msgss_202104/ If you have any questions or concerns, feel free to reach out at msgso.gss2021(a)gmail.com . We look forward to hosting y'all in April! Sincerely, The DISL Marine Science Graduate Student Organization -- Lauren R. Clance M.S. Student University of South Alabama Dauphin Island Sea Lab 101 Bienville Blvd Dauphin Island, AL 36528

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Right Whale Health Assessment paper
by Michael Moore 04 Mar '21

04 Mar '21

OPEN ACCESS at - https://www.int-res.com/articles/feature/d143p205.pdf <https://www.int-res.com/articles/feature/d143p205.pdf> Assessing North Atlantic right whale health: threats, and development of tools critical for conservation of the species Michael J. Moore, Teresa K. Rowles, Deborah A. Fauquier, Jason D. Baker, Ingrid Biedron, John W. Durban, Philip K. Hamilton, Allison G. Henry, Amy R. Knowlton, William A. McLellan, Carolyn A. Miller, Richard M. Pace III, Heather M. Pettis, Stephen Raverty, Rosalind M. Rolland, Robert S. Schick, Sarah M. Sharp, Cynthia R. Smith, Len Thomas, Julie M. van der Hoop, Michael H. Ziccardi ABSTRACT: Whaling has decimated North Atlantic right whales /Eubalaena glacialis/ (NARW) since the 11th century and southern right whales /E. australis/ (SRW) since the 19th century. Today, NARWs are Critically Endangered and decreasing, whereas SRWs are recovering. We review NARW health assessment literature, NARW Consortium databases, and efforts and limitations to monitor individual and species health, survival, and fecundity. Photographs are used to track individual movement and external signs of health such as evidence of vessel and entanglement trauma. Post-mortem examinations establish cause of death and determine organ pathology. Photogrammetry is used to assess growth rates and body condition. Samples of blow, skin, blubber, baleen and feces quantify hormones that provide information on stress, reproduction, and nutrition, identify micro - biome changes, and assess evidence of infection. We also discuss models of the population consequences of multiple stressors, including the connection be tween human activities (e.g. entanglement) and health. Lethal and sublethal vessel and entanglement trauma have been identified as major threats to the species. There is a clear and immediate need for expanding trauma reduction measures. Beyond these major concerns, further study is needed to evaluate the impact of other stressors, such as pathogens, microbiome changes, and algal and industrial toxins, on NARW reproductive success and health.

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New publication: Estimation of the feeding record of pregnant Antarctic minke whales (Balaenoptera bonaerensis) using carbon and nitrogen stable isotope analysis of baleen plates
by Yoko Mitani 03 Mar '21

03 Mar '21

Dear all, On behalf of my co-authors, I am pleased to inform you about our paper titled "Estimation of the feeding record of pregnant Antarctic minke whales (Balaenoptera bonaerensis) using carbon and nitrogen stable isotope analysis of baleen plates", recently published in Polar Biology. The paper is open access, so please download it from this web page: https://link.springer.com/article/10.1007/s00300-021-02816-5 Uchida, M., Suzuki, I., Ito, K. et al. Estimation of the feeding record of pregnant Antarctic minke whales (Balaenoptera bonaerensis) using carbon and nitrogen stable isotope analysis of baleen plates. Polar Biol (2021). https://doi.org/10.1007/s00300-021-02816-5 Abstract Antarctic minke whales (Balaenoptera bonaerensis) are migratory capital breeders that experience intensive summer feeding on Antarctic krill (Euphausia superba) in the Southern Ocean and winter breeding at lower latitudes, but their prey outside of the Antarctic is unknown. Stable isotope analyses were conducted on δ13C and δ15N from the baleen plates of ten pregnant Antarctic minke whales to understand the growth rate of the baleen plate and their diet in lower latitudes. Two to three oscillations along the length of the edge of the baleen plate were observed in δ15N, and the annual growth rate was estimated to be 75.2 ± 20.4 mm, with a small amplitude (0.97 ± 0.21 ‰). Bayesian stable isotope mixing models were used to understand the dominant prey that contributed to the isotopic component of the baleen plate using Antarctic krill from the stomach contents and reported values of Antarctic coastal krill (Euphausia crystallorophias), Antarctic silver fish (Pleuragramma antarcticum), Australian krill spp., and Australian pelagic fish spp.. The models showed that the diet composition of the most recent three records from the base of the baleen plates (model 1) and the highest δ15N values in each baleen plate (model 2) were predominantly Antarctic krill, with a contribution rate of approximately 80%. The rates were approximately 10% for Antarctic coastal krill and less than 2.0% for the two Australian prey groups in both models. These results suggest that pregnant Antarctic minke whales did not feed on enough prey outside of the Antarctic to change the stable isotope values in their baleen plates. Best regards, Yoko -- 三谷曜子　Yoko Mitani 北海道大学北方生物圏フィールド科学センター海獣班 HokkaidOcean Mammal Team 〒040-0051 北海道函館市弁天町20番5号函館市国際水産・海洋総合研究センター内219号室 Tel: 0138-85-6558; Fax: 0138-85-6625 Email: yo_mitani(a)fsc.hokudai.ac.jp Yoko MITANI HokkaidOcean Mammal Team Field Science Center for Northern Biosphere, Hokkaido University Hakodate Research Center for Fisheries and Oceans 20-5 Benten-cho, Hakodate, Hokkaido 040-0051, JAPAN TEL: +81-138-85-6558; FAX: +81-138-85-6625 E-mail: yo_mitani(a)fsc.hokudai.ac.jp

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New Publication: Population genomic structure and connectivity of common dolphins from Australasia
by Andrea Barceló 03 Mar '21

03 Mar '21

On behalf of all the co-authors we are pleased to announce our new publication in the special issue of Small Cetacean Conservation: Current Challenges and Opportunities in Frontiers and Marine Science. The publication is titled "A Matter of Scale: Population Genomic Structure and Connectivity of Fisheries at-risk Common Dolphins (*Delphinus delphis*) from Australasia" The article can be obtained from: https://www.frontiersin.org/articles/10.3389/fmars.2021.616673/full Abstract: An understanding of population structure and connectivity at multiple spatial scales is required to assist wildlife conservation and management. This is particularly critical for widely distributed and highly mobile marine mammals subject to fisheries by-catch. Here, we present a population genomic assessment of a near-top predator, the common dolphin (*Delphinus delphis*), which is incidentally caught in multiple fisheries across the Australasian region. The study was carried out using 14,799 ddRAD sequenced genome-wide markers genotyped for 478 individuals sampled at multiple spatial scales across Australasia. A complex hierarchical metapopulation structure was identified, with three highly distinct and genetically diverse regional populations at large spatial scales (>1,500 km). The populations inhabit the southern coast of Australia, the eastern coast of Australia, New Zealand and Tasmania, with the latter also showing a considerable level of admixture to Australia's east coast. Each of these regional populations contained two to four nested local populations (i.e., subpopulations) at finer spatial scales, with most of the gene flow occurring within distances of 50 to 400 km. Estimates of contemporary migration rates between adjacent subpopulations ranged from 6 to 25%. Overall, our findings identified complex common dolphin population structure and connectivity across state and international jurisdictions, including migration and gene flow across the Tasman Sea. The results indicate that inter-jurisdictional collaboration is required to implement conservation management strategies and mitigate fisheries interactions of common dolphins across multiple spatial scales in the Australasian region. Barceló A, Sandoval-Castillo J, Stockin KA, Bilgmann K, Attard CRM, Zanardo N, Parra GJ, Hupman K, Reeves IM, Betty EL, Tezanos-Pinto G, Beheregaray LB and Möller LM (2021) A Matter of Scale: Population Genomic Structure and Connectivity of Fisheries At-Risk Common Dolphins (*Delphinus delphis*) From Australasia. Front. Mar. Sci. 8:616673. doi: 10.3389/fmars.2021.616673 Kind regards, Andrea Barceló PhD Candidate Cetacean, Ecology, Behaviour And Evolution Lab (CEBEL)| Molecular Ecology Lab (MELFU) School of Biological Sciences, Flinders University andrea.barcelo(a)flinders.edu.au www.cebel.org.au(CEBEL)| www.molecularecology.flinders.edu.au

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New publication: Marine soundscape variation reveals insights into baleen whales and their environment: a case study in central New Zealand
by Victoria Warren 03 Mar '21

03 Mar '21

Dear colleagues, My co-authors and I are pleased to announce the publication of the following article: Marine soundscape variation reveals insights into baleen whales and their environment: a case study in central New Zealand. Victoria E. Warren, Craig McPherson, Giacomo Giorli, Kimberly T. Goetz and Craig A. Radford. Royal Society Open Science, 2021, https://doi.org/10.1098/rsos.201503 ABSTRACT Baleen whales reliably produce stereotyped vocalizations, enabling their spatio-temporal distributions to be inferred from acoustic detections. Soundscape analysis provides an integrated approach whereby vocal species, such as baleen whales, are sampled holistically with other acoustic contributors to their environment. Acoustic elements that occur concurrently in space, time and/or frequency can indicate overlaps between free-ranging species and potential stressors. Such information can inform risk assessment framework models. Here, we demonstrate the utility of soundscape monitoring in central New Zealand, an area of high cetacean diversity where potential threats are poorly understood. Pygmy blue whale calls were abundant in the South Taranaki Bight (STB) throughout recording periods and were also detected near Kaikōura during autumn. Humpback, Antarctic blue and Antarctic minke whales were detected in winter and spring, during migration. Wind, rain, tidal and wave activity increased ambient sound levels in both deep- and shallow-water environments across a broad range of frequencies, including those used by baleen whales, and sound from shipping, seismic surveys and earthquakes overlapped in time, space and frequency with whale calls. The results highlight the feasibility of soundscape analysis to quantify and understand potential stressors to free-ranging species, which is essential for conservation and management decisions. The open-access article can be downloaded from https://royalsocietypublishing.org/doi/10.1098/rsos.201503 You are very welcome to contact me via email (vwar775(a)aucklanduni.ac.nz) if you have any questions. Kind regards, Victoria Warren -- Victoria Warren, Ph.D University of Auckland

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Updated information on free webinar of the ECS
by Webeditor ECS 03 Mar '21

03 Mar '21

EUROPEAN CETACEAN SOCIETY Dear all, We hope this message finds you well. As previously announced, the ECS WEBINAR will take place between 15th and the 19th March 2021; in less than two weeks! We are delighted to share with you the FINAL PROGRAM of the webinar with detailed information of the presentations (including abstracts). We hope that this program will be as interesting to you, as it is to us! <https://www.europeancetaceansociety.eu/ecs-webinar-2021> https://www.europeancetaceansociety.eu/ecs-webinar-2021 The webinar is open to everyone and no registration is needed. It will be hosted by the ECS using ZOOM WEBINAR. The presentations will be recorded and posted online to render them accessible to a wider audience after the event, unless indicated otherwise by those presenters who may be sharing some sensitive material (e.g., unpublished data). In a few days, we will be sharing the link needed to attend the webinar and basic webinar etiquette tips for attendees. This information will be soon also available in the ECS website provided above. Sincerely yours, ECS Council -- Apologies for cross-posting

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New report on odontocetes off Kaua'i, including satellite tagging, photo-ID and PAM
by Robin Baird 03 Mar '21

03 Mar '21

New report available at https://www.cascadiaresearch.org/files/publications/Bairdetal2021_Kauai.pdf Baird, R. W., C. J. Cornforth, S. M. Jarvis, N. A. DiMarzio, K. Dolan, E. E. Henderson, S. W. Martin, S. L. Watwood, S. D. Mahaffy, B. D. Guenther, J. K. Lerma, A. E. Harnish, and M. A. Kratofil. 2021. Odontocete Studies on the Pacific Missile Range Facility in February 2020: Satellite-Tagging, Photo-Identification, and Passive Acoustic Monitoring. Prepared for Commander, Pacific Fleet, under Contract No. N62470-15-D-8006 Task Order N6274219F0101 issued to HDR Inc., Honolulu, HI. Executive summary As part of a long-term U.S. Navy-funded marine mammal monitoring program, in February 2020 a combination of vessel-based field effort and passive acoustic monitoring was carried out on and around the Pacific Missile Range Facility (PMRF) off Kaua‘i prior to a Submarine Command Course scheduled for mid-February 2020. The purpose of the monitoring effort was to assess the spatial movement patterns and habitat use of cetaceans that are exposed to mid-frequency active sonar and how those patterns influence exposure and potentially responses. Results from this effort were compared with previous Cascadia Research Collective (CRC) survey effort and photo-identification and tag data from Kaua‘i, based on surveys in 11 different years since 2003. During the survey, the Marine Mammal Monitoring on Navy Ranges (M3R) system was used both to direct the research vessel to potential high-priority species and to inform the research vessel when only low-priority species were detected on the range, allowing it to survey off the range and thus increase overall encounter rates with high-priority species. Over the course of the 13-day project, there were 1,064 kilometers [km] (71.3 hours) of small-vessel survey effort, 47 sightings of seven species of odontocetes, 23 sightings of humpback whales (Megaptera novaeangliae), and one sighting of an unidentified odontocete. Of the 48 odontocete sightings, 20 were on PMRF representing four of seven species, and of those eight were directed by M3R acoustic detections. During the encounters, we took 26,178 photographs for species and individual identification, with photographs added to long-term CRC catalogs for short-finned pilot whales (Globicephala macrorhynchus), false killer whales (Pseudorca crassidens), pygmy killer whales (Feresa attenuata), common bottlenose dolphins (Tursiops truncatus), and rough-toothed dolphins (Steno bredanensis). Nineteen biopsy samples were taken from five species. Spinner dolphins (Stenella longirostris) were seen on 12 occasions, but this was a low-priority species so limited efforts were expended to work with them. As expected based on previous CRC efforts off Kaua‘i and Ni‘ihau, rough-toothed dolphins were the most frequently encountered species, comprising 18 of 47 encounters with known species (38.3 percent). Ten of the 18 encounters were on PMRF. A social network analysis of photo-identification data of rough-toothed dolphins indicated that all but two of the identified individuals from this project linked to the main cluster of the resident, island-associated population. In three of the sightings a single melon-headed whale was present, as well as a melon-headed whale x rough-toothed dolphin hybrid, both of which had been previously documented off Kauaʻi during CRC’s August 2017 field effort. The melon-headed whale was not approachable for tagging. For two of the three sightings of the hybrid and melon-headed whale, the individuals were not noted at the time of the encounters but were only recognized from later analysis of photographs. Short-finned pilot whales were encountered only once, and a single SPLASH-10F depth-transmitting satellite tag that included Fastloc®-GPS capability was deployed. The group with the tagged animal had been previously documented in five different years (all off either Kauaʻi or Oʻahu), and was considered to belong to the resident western community of short-finned pilot whales. A crawl model (continuous-time correlated random walk state-space model) of the tag data produced a total of 372 locations at 1-hour intervals compared to 314 total Argos locations, and 277 combined Argos and GPS locations. Behavior (i.e., dive depths and durations of dives and surfacing periods) data coverage during the 12 days that behavior was recorded was 86.8 percent. Over the 16-day period during which the tag transmitted, the group spent most of its time in deep water far offshore (median depth=3,504 meters, median distance from shore=28.1 km), remaining in the area where the Submarine Command Course took place. Pygmy killer whales were sighted once. This group was not approachable for tagging, but identification photos were obtained for 15 individuals, none of which had been previously identified. This species is among the least likely to be encountered off Kauaʻi or Niʻihau; in previous CRC surveys they have only been documented on two occasions. Neither of these groups have been documented prior or subsequently, providing additional evidence that there is no resident population of this species off Kauaʻi or Niʻihau. False killer whales were encountered on three occasions over two days (14 and 15 February 2020), with all sightings on PMRF and two in response to acoustic detections. None of the groups were approachable for tagging, but identification photos were obtained for the two encounters on 14 February 2020. Eight identifications were obtained from the first encounter on 14 February 2020, four of which had been previously documented and linked by association to the Northwestern Hawaiian Islands population of false killer whales. Only a single identification was obtained from the second encounter on 14 February 2020. While the individual had not been previously documented, it was most likely also from the Northwestern Hawaiian Islands population, given the proximity to the first encounter. Three biopsy samples were obtained, from individuals in both of the encounters on 14 February 2020. The 15 February 2020 encounter was brief (<1 minute), with a single individual lost shortly after being sighted. Common bottlenose dolphins (hereafter bottlenose dolphins) were encountered on nine occasions, and 46 good-quality identifications of 24 distinctive individuals were obtained. Of those, 23 had been previously documented, and all were linked by association with the resident community of bottlenose dolphins from Kauaʻi and Niʻihau. Two SPLASH10 depth-transmitting satellite tags were deployed onto bottlenose dolphins during the project, on 15 and 17 February 2020. Both individuals tagged are known members of the resident Kauaʻi and Niʻihau community, and one of the two individuals had been previously tagged during a 2013 CRC field project. The tags produced 223 and 383 Argos locations over 13.9 and 20.0 days, respectively, and generally remained close to the islands (median depth=119 m and 180 m, median distance from shore=3.1 km and 3.7 km, respectively). Behavioral data (i.e., dive and surfacing) coverage during deployment was 100 percent for both tags. Probability-density analyses were undertaken using 12-hour locations from crawl state-space models of tag-location data obtained for the two species for which tag data were available from this effort, incorporating data from all previous tag deployments on individuals from these populations. Core areas (50 percent kernel densities) were identified for the resident populations of bottlenose dolphins (1,852 square kilometers) and the western community of short-finned pilot whales (8,736 square kilometers). While the core areas for both populations overlap with at least part of PMRF, the differences in the proportion of the core area that overlaps with PMRF suggests that the likelihood of exposure to mid-frequency active sonar on PMRF varies substantially between populations. Continued collection of photo-identification, movement, and habitat-use data from these species allows for a better understanding of the use of the range and surrounding areas, as well as estimation of abundance and examination of trends in abundance for resident populations. For additional publications and reports on our work in Hawaiʻi see https://www.cascadiaresearch.org/hawaiian-cetacean-studies/publications ================================================================= Robin W. Baird, Ph.D. Research Biologist, Cascadia Research Collective Affiliate Faculty, Hawaiʻi Institute of Marine Biology Mailing address: Cascadia Research Collective 218 1/2 W. 4th Avenue Olympia, WA 98501 USA Follow us on Facebook<https://www.facebook.com/CascadiaResearch/> Updates on our December 2020 Maui Nui project<https://www.cascadiaresearch.org/hawaiian-cetacean-studies/December2020>

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New publication: Potential distribution of Guiana dolphin (Sotalia guianensis): a coastal-estuarine and tropical habitat specialist (Aline de Jesus Lobo)
by Aline Lobo 03 Mar '21

03 Mar '21

Dear colleagues, My colleagues and I are pleased to announce the publication of our article: Lobo, A. J.; Wedekin, L. L.; Sobral-Souza, T. and Le Pendu, Y. Potential distribution of Guiana dolphin (*Sotalia guianensis*): a coastal-estuarine and tropical habitat specialist. Published: 18 February 2021, Journal of mammalogy. Abstract Ecological niche models (ENMs) predict where species can occur in accordance with environmental factors. Suitability maps are generated through models to identify habitats more or less adapted to the species. Published works on the distribution and habitat use of Guiana dolphin, *Sotalia guianensis*, are limited to fine spatial scales. Here, we aimed to predict the potential geographical distribution of Guiana dolphins through ENMs and generate a map of suitable habitats for the species. Data were collected between 1997 and 2015 in Brazil, French Guiana, and Colombia. The environmental data were obtained from MARSPEC database with a cell resolution of 10 × 10 km. For modeling, 99 of the 859 initial occurrence points of the species were considered after rarefaction. Seven environmental variables were selected through factorial analysis: bathymetry, distance to shore, bathymetric slope, sea surface salinity (minimum monthly and annual range), and sea surface temperature (mean annual and annual range). Results from five distinct algorithms were assembled to generate the distribution model. Our findings show potential areas in shallow platforms of the continental margin of South and Central America, including regions where the species has never been reported, such as the Pacific Ocean, the Gulf of California, the Gulf of Mexico, and the oceanic islands in the Caribbean Sea. The absence of Guiana dolphins in these regions may be due to geographical (linking of North and South America), physical (water temperature), and biological (competition, limited ability to dispersal) limiting factors. The models suggest that the presence of other species of coastal dolphin may be an important limiting factor for the Guiana dolphin at both extremes of its distribution. The Guiana dolphin is habitat specialist with a clinal potential geographic distribution concentrated in tropical and subtropical shallow and coastal waters of the continental shelf of the western Atlantic Ocean. This more restricted distribution than reported by IUCN and other studies suggests a cautionary approach to its conservation status due to limited dispersal abilities and high overlap with human activities. Please feel free to contact me if you need a copy: *alinejlobo(a)gmail.com Best regards, MSc Aline de Jesus Lobo MSc Aline de Jesus Lobo Bióloga - CRBio 116115/01-D Marine Mammal Observer - MMO/JNCC Protect Species Observer - PSO Lattes: http://lattes.cnpq.br/4363911144586456

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New publication: First evidence of interchange of humpback whales (Megaptera novaeangliae) between the Magellan Strait and Antarctic Peninsula feeding grounds / Primera evidencia de intercambio de ballenas jorobadas (Megaptera novaeangliae) entre las áreas de alimentación del estrecho de Magallanes y Península Antártica
by Ted Cheeseman 02 Mar '21

02 Mar '21

My co-authors and I are pleased to bring your attention to a recently published short note: Acevedo, J., Capella, J., Cheeseman, T., Monnahan, C.C., Southerland, K., Acuña, P., Aguayo-Lobo, A., 2021. First evidence of interchange of humpback whales (Megaptera novaeangliae) between the Magellan Strait and Antarctic Peninsula feeding grounds. Polar Biol. 1–7. https://doi.org/10.1007/s00300-021-02827-2 Primera evidencia de intercambio de ballenas jorobadas (Megaptera novaeangliae) entre las áreas de alimentación del estrecho de Magallanes y Península Antártica Abstract Eastern South Pacific humpback whales (Megaptera novaeangliae) migrate to three distinct mid- to high-latitude feeding areas. While movements between local breeding sites have been reported, interchange among the feeding areas has not been documented and thus has assumed not to exist. Identifying photographs of 187 humpback whales in the Magellan Strait were compared with 2,553 whales from the Antarctic Peninsula feeding area, resulting in two matches. Additionally, 37 skin samples collected at the Magellan Strait were analyzed for carbon and nitrogen stable isotopes, resulting in evidence that two other individuals traveled to the Antarctic Peninsula. Our findings provide the first known evidence of interchange between two of these feeding areas in the eastern South Pacific. The data suggest a very limited interchange, but demonstrate that some whales may permanently leave the Magellan Strait, or perform short, round-trip movement between these areas. This previously undocumented interchanges do not necessarily change existing management recommendations that the Magellan Strait is a demographically independent feeding area, but does suggest that future abundance estimate models should assume low immigration rates. Further research to better understand the extent and frequency of interchange in the austral region of South America is needed, as this will further clarify the population structure of these whales leading to more accurate scientific knowledge supporting the conservation and management of the species. Resumen Las ballenas jorobadas (Megaptera novaeangliae) del Pacífico Suroriental migran a tres diferentes áreas de alimentación localizadas en latitudes medias y altas. Mientras los movimientos entre los sitios de reproducción han sido informados, el intercambio entre las áreas de alimentación no ha sido documentado y ha sido asumido a no ocurrir. Fotografías de 187 ballenas jorobadas identificados en el estrecho de Magallanes fueron comparados con 2.553 ballenas del área de alimentación de la Península Antártica, resultando en dos recapturas. Adicionalmente, 37 muestras de piel colectados en el estrecho de Magallanes fueron analizados para isótopos estables de carbono y nitrógeno, resultando en evidencias que otros dos individuos viajaron de ida y vuelta a la Península Antártica. Nuestros hallazgos proveen la primera evidencia de intercambio entre dos de estas áreas de alimentación en el Pacífico Suroriental. Los datos sugieren un muy limitado intercambio, pero demuestra que algunas ballenas pueden abandonar permanentemente el estrecho de Magallanes, o realizar cortos viajes entre estas áreas. El intercambio documentado no necesariamente cambia las recomendaciones de manejo existente de que el estrecho de Magallanes es un área de alimentación demográficamente independiente, pero sugiere que futuros modelos de estimados de abundancia deben asumir una baja tasa de inmigración. Mayor investigación para comprender mejor la extensión y frecuencia de intercambio en la región austral de América del Sur es requerida, ya que permitirá aclarar aún más la estructura de la población de estas ballenas y de un conocimiento científico más preciso que respalde la conservación y el manejo de la especie. For a pdf or correspondence please contact Jorge Acevedo <jorge.acevedo(a)LIVE.CL> or myself, Ted Cheeseman <ted(a)happywhale.com <mailto:ted@happywhale.com>> Good health and great whales to all :) Ted — Ted Cheeseman ted(a)happywhale.com www.Happywhale.com https://www.facebook.com/happywhales/ ** know your whales :) **

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REMAINDER Marine Mammals Library sale to benefit VIVA Vaquita
by Jay R Cordeiro 02 Mar '21

02 Mar '21

Friends and colleagues. ROUND TWO of what remains of the MARINE MAMMAL AND WHALING BOOKS from the private collection of marine mammal biologist Dr. Thomas A. Jefferson and transferred to the non-profit organization, VIVA Vaquita is being offered for sale at discounted pricing. All purchases from this list are offered at a 20% DISCOUNT from the list price. Dr. Jefferson is a marine mammal conservation biologist at the NMFS Southwest Fisheries Science Center in southern California Most of the books have been donated (many by the late Dr. Edward D. Mitchell and bearing his signature and/or stamp) with the proceeds used to raise funds for conservation work on the world's most endangered species of marine mammal, the vaquita porpoise (Phocoena sinus) of Mexico. 100% of the funds raised will be donated to VIVA Vaquita and used in work to prevent the extinction of this and other species of endangered marine mammals. For more information on VIVA Vaquita, visit the website: http://vivavaquita.org/ The complete list or remaindered titles is online at: https://sites.google.com/site/northeastnaturalhistory/home/Newest-Lists/lis… For those hungry for MORE MARINE MAMMALS BOOKS, please see our former book catalogue of over 450 works issued previously. Many of these remain and are still available for purchase. The complete catalogue is viewable at: https://sites.google.com/site/northeastnaturalhistory/home/Prior-Catalogues… Please direct all correspondence to Northeast Natural History & Supply by emailing j.cordeiro(a)nenaturalhistory.com FYI, see other lists of available titles from other collections online including HERPETOLOGY https://sites.google.com/site/northeastnaturalhistory/home/Newest-Lists/lis… GEOLOGY AND PALEONTOLOGY (https://sites.google.com/site/northeastnaturalhistory/home/Newest-Lists/lis… ORNITHOLOGY https://sites.google.com/site/northeastnaturalhistory/home/Newest-Lists/lis… Thanks, Jay “for there is no folly of the beast of the earth which is not infinitely outdone by the madness of men” ― Herman Melville, Moby Dick<https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.goodr…> Jay Cordeiro Northeast Natural History & Supply PO Box 361 West Dennis, MA 02670 j.cordeiro(a)nenaturalhistory.com<mailto:unionid@comcast.net> Website: https://sites.google.com/site/northeastnaturalhistory/home<https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsites.goo…> Facebook: https://www.facebook.com/NortheastNaturalHistorySupply/<https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.faceb…>

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