{"elementGlobalId":102213,"circumscripConfidence":{"id":1,"circumscripConfidenceDescEn":"1 - Strong","circumscripConfidenceDescEs":"1 - Fuerte","circumscripConfidenceDescFr":"1 – Forte"},"classificationLevel":{"id":7,"classificationLevelNameEn":"Species","classificationLevelNameEs":"Especies","classificationLevelNameFr":"Espèce"},"classificationStatus":{"id":1,"classificationStatusDescEn":"Standard","classificationStatusDescEs":"Estándar","classificationStatusDescFr":"Standard"},"iucn":{"id":11,"iucnDescEn":"Least concern","iucnDescEs":"Menos preocupante","iucnDescFr":"Moins préoccupante","iucnCode":"LC"},"nameCategory":{"id":1,"nameCategoryDescEn":"Vertebrate Animal","nameCategoryDescEs":"Animal vertebrado","nameCategoryDescFr":"Animal vertébré","nameTypeCd":"A","nameTypeDesc":"Zoological"},"rankMethodUsed":{"id":4,"rankMethodUsedDescEn":"Expertise without calculation","rankMethodUsedDescEs":null,"rankMethodUsedDescFr":null,"rankMethodUsedExternalDescEn":"Ranked by inspection","rankMethodUsedExternalDescEs":null,"rankMethodUsedExternalDescFr":null},"formattedScientificName":"<i>Lissodelphis borealis</i>","scientificName":"Lissodelphis borealis","scientificNameAuthor":"(Peale, 1848)","primaryCommonName":"Northern Right Whale Dolphin","relatedItisNames":"<i>Lissodelphis borealis</i> (Peale, 1848) (TSN 180454)","uniqueId":"ELEMENT_GLOBAL.2.102213","elcode":"AMAGE05010","conceptRefFullCitation":"Wilson, D. E., and D. M. Reeder (editors). 1993. Mammal species of the world: a taxonomic and geographic reference. Second edition. Smithsonian Institution Press, Washington, DC. xviii + 1206 pp. Available online at: http://www.nmnh.si.edu/msw/.","conceptName":"<i>Lissodelphis borealis</i>","taxonomicComments":"This may be a monotypic genus (Mead and Brownell, in Wilson and Reeder 1993, 2005); i.e., <i>L. borealis</i> may be conspecific with <i>L. peronii</i> of the Southern Hemisphere.","roundedGRank":"G5","conservationStatusFactorsEditionDate":"2003-11-12","conservationStatusFactorsEditionAuthors":null,"primaryCommonNameLanguage":"EN","recordType":"SPECIES","elementNationals":[{"elementNationalId":164662,"classifConfidence":null,"nation":{"id":225,"nameEn":"United States","nameEs":"Estados Unidos","nameFr":"États-Unis","isoCode":"US","region":"United States"},"roundedNRank":"NU","elementSubnationals":[{"elementSubnationalId":270951,"subnation":{"id":44,"nameEn":"Oregon","nameEs":"Oregón","nameFr":"Oregon","subnationCode":"OR","dnationId":225},"roundedSRank":"SNA","dataSensitive":{"id":2,"dataSensitiveDescEn":"No","dataSensitiveDescEs":null,"dataSensitiveDescFr":null,"dataSensitiveCode":"N"},"dataSensitiveCategory":null,"srank":"SNA","speciesSubnational":{"elementSubnationalId":270951,"hybrid":false,"exotic":false,"native":true}},{"elementSubnationalId":392950,"subnation":{"id":7,"nameEn":"California","nameEs":"California","nameFr":"Californie","subnationCode":"CA","dnationId":225},"roundedSRank":"SNR","dataSensitive":{"id":2,"dataSensitiveDescEn":"No","dataSensitiveDescEs":null,"dataSensitiveDescFr":null,"dataSensitiveCode":"N"},"dataSensitiveCategory":null,"srank":"SNR","speciesSubnational":{"elementSubnationalId":392950,"hybrid":false,"exotic":false,"native":true}}],"nrank":"NU","nrankReviewYear":1997,"speciesNational":{"elementNationalId":164662,"exotic":false,"native":true}},{"elementNationalId":166304,"classifConfidence":null,"nation":{"id":38,"nameEn":"Canada","nameEs":"Canadá","nameFr":"Canada","isoCode":"CA","region":"Canada"},"roundedNRank":"N5","elementSubnationals":[{"elementSubnationalId":267759,"subnation":{"id":61,"nameEn":"British Columbia","nameEs":"Columbia Británica","nameFr":"Colombie-Britannique","subnationCode":"BC","dnationId":38},"roundedSRank":"S5","dataSensitive":{"id":2,"dataSensitiveDescEn":"No","dataSensitiveDescEs":null,"dataSensitiveDescFr":null,"dataSensitiveCode":"N"},"dataSensitiveCategory":null,"srank":"S5","speciesSubnational":{"elementSubnationalId":267759,"hybrid":false,"exotic":false,"native":true}}],"nrank":"N5","nrankReviewYear":2024,"speciesNational":{"elementNationalId":166304,"exotic":false,"native":true}}],"lastModified":"2026-10-02T21:38:31.379803Z","lastPublished":"2026-10-02T21:32:08.892226Z","promotionalDescription":null,"conceptLineageSummary":null,"nsxUrl":"/Taxon/ELEMENT_GLOBAL.2.102213/Lissodelphis_borealis","grankChangeDate":"2017-02-12","grankReasons":null,"grankReviewDate":"2017-02-12","grank":"G5","grankAdjustmentReasons":null,"rankInfo":{"elementGlobalId":102213,"aooPercentGood":null,"enviromentalSpecificity":null,"intrinsicVulnerability":null,"longTermTrend":null,"numberEos":null,"numberGoodEos":null,"numberProtEos":null,"popSize":{"id":34,"popSizeDescEn":"100,000 - 1,000,000 individuals","popSizeDescEs":"De 100.000 a 1.000.000 de individuos","popSizeDescFr":"De 100 000 à 1 000 000 individus"},"rangeExtent":null,"shortTermTrend":{"id":6,"shortTermTrendDescEn":"Decline of >10%","shortTermTrendDescEs":"Disminución de >10%.","shortTermTrendDescFr":"Diminution de >10 %"},"threatImpactAssigned":null,"rangeExtentComments":"North Pacific Ocean, mainly in moderate temperate waters. Mainly British Columbia to Baja California, Kuril Islands to Japan in western Pacific; sometimes north to Aleutians and Gulf of Alaska; in the eastern Pacific, apparently most common off central and southern California; at least as far south as 35 degrees north in the central Pacific (Jefferson and Newcomer 1993). Rare in Canadian waters (Baird and Stacey 1991). Eastern and western Pacific populations may be separated by an area of very low density south of the western Aleutians (Leatherwood and Reeves 1983).","areaOfOccupancy":null,"areaOfOccupancyComments":null,"numberEosComments":null,"popSizeComments":"One of the most abundant oceanic dolphins in the temperate North Pacific (Leatherwood and Reeves 1983). Preliminary estimate of total population: 247,000-535,000 (Mangel, cited by Jefferson and Newcomer 1993). Hiramatsu (1991) estimated the population at 535,000 (95% confidence interval 394,000-738,000). Several 10,000s off California (see Jefferson and Newcomer 1993).","viabilityComments":null,"threatImpactComments":"This is the major marine mammal taken incidently in the extensive squid driftnet fishery that operates out of Japan, Korea, and Taiwan, which probably has greatly reduced the population in the western Pacific (take was estimated at 15,000-20,000 per year in the late 1980s); occasionally taken in salmon gillnet fisheries and in driftnets set for sharks and swordfish (Jefferson and Newcomer 1993).","shortTermTrendComments":"Current abundance is 24 to 73 percent of the abundance in 1978, depending on which estimate of current population is assumed (Mangel 1993).","longTermTrendComments":null,"inventoryNeeds":null,"numberProtEosComments":null,"protectionNeeds":null,"otherConsiderations":null,"intrinsicVulnerabilityComments":null,"enviromentalSpecificityComments":null},"animalCharacteristics":{"elementGlobalId":102213,"majorHabitat":{"id":1,"majorHabitatDescEn":"Marine","majorHabitatDescEs":"Marino","majorHabitatDescFr":"Marine"},"nonMigrant":false,"localMigrant":true,"longDistanceMigrant":false,"mobilityMigrationComments":"Distribution tends to shift south and inshore during cooler months, north and offshore summer through fall; movement possibly are related to the availability of spawning squid (Leatherwood and Reeves 1983, Jefferson and Newcomer 1993).","foodHabitsComments":"Most common food items are market squid and lanternfish; other prey includes other squids, Pacific hake, saury, and epi- and mesopelagic fishes of the families Centrolophidae, Melamphaidae, Bathylagidae, and Paralepididae (Leatherwood and Reeves 1983, Jefferson and Newcomer 1993).","animalPhenologyComments":null,"colonialBreeder":false,"length":310,"width":null,"weight":null,"animalPhenologies":[],"animalFoodHabits":[{"animalCagFoodHabitsId":103262,"foodHabits":{"id":2,"foodHabitsDescEn":"Piscivore","foodHabitsDescEs":"Piscivore","foodHabitsDescFr":"Piscivore","displayOrder":2},"adult":true,"immature":true},{"animalCagFoodHabitsId":103263,"foodHabits":{"id":3,"foodHabitsDescEn":"Invertivore","foodHabitsDescEs":"Invertívoro","foodHabitsDescFr":"Invertivore","displayOrder":3},"adult":true,"immature":true}]},"occurrenceDelineations":[{"eoSpecsDetailId":1070,"locationUseClass":{"id":1,"locationUseClassDescEn":"Not applicable","locationUseClassDescEs":"No se aplica","locationUseClassDescFr":"Sans objet","displayOrder":1},"eoSpecGroupName":"Dolphins and Porpoises","subtypes":null,"inferredExtentDistance":null,"inferredExtentNotes":null,"minimumEoCriteria":"A marine area that  is or has been occupied consistently or recurrently. Occurrences not based on the entire range of particular populations or subpopulations, but rather on distinct areas that are important to the survival of these populations.   Minimally, at least two and preferably several years of observation should be used to reliably identify significant, recurrent occurrences.","mappingGuidance":null,"separationBarriers":"Upland areas.","separationDistanceUnsuitableHabitatat":20.0,"separationDistanceSuitableHabitatat":20.0,"altSeparationProcedure":null,"separationJustification":"Separation Distance arbitrary.  In most cases, occurrences should not be extensive areas but rather portions of such areas that stand out as strongly meeting the occurrence criteria. <br> Available information on genetics, dispersion, and movement patterns of most populations generally is insufficient to determine biologically meaningful separation distances for occurrences. The separation distance used here does not attempt to identify biologically distinct populations but rather is an arbitrary value that attempts to identify relatively distinct geographic areas that have frequent or concentrated activity and that are of practical size. <br> Bottlenose Dolphins (TURSIOPS TRUNCATUS) that were resident in a South Carolina estuary had relatively small home ranges (mean  51.3 square kilometers, 95% adaptive kernel method; Gubbins 2002).","versionDate":"2002-03-06","versionAuthor":"Cannings, S.","versionNotes":"Contains all members of the families Delphinidae and Phocoenidae, except ORCINUS ORCA.","lastModified":"2020-04-30T02:04:20.034948Z"}],"plantCharacteristics":null,"elementManagement":{"elementGlobalId":102213,"eoManagementGroupName":null,"stewardshipOverview":null,"impacts":null,"restorationPotential":null,"siteConservationPlansConsidered":null,"managementMethods":null,"monitoringMethods":null,"managementProgramContacts":null,"monitoringProgramContacts":null,"managementResearchPrograms":null,"managementResearchNeeds":null,"biologicalResearchNeeds":null,"additionalTopics":null},"occurrenceViabilities":[{"eoRankSpecsDetailId":103733,"eoRankSpecsGroupName":null,"locationUseClass":{"id":1,"locationUseClassDescEn":"Not applicable","locationUseClassDescEs":"No se aplica","locationUseClassDescFr":"Sans objet","displayOrder":1},"excellentViability":null,"goodViability":null,"fairViability":null,"poorViability":null,"viabilityJustification":"Use the Generic Guidelines for the Application of Occurrence Ranks (2008).<br>The Key for Ranking Species Occurrences Using the Generic Approach provides a step-wise process for implementing this method.","versionDate":null,"versionAuthor":null,"versionNotes":null,"lastModified":"2020-05-14T02:21:02.395503Z"}],"references":[{"id":1151804,"citation":"American Society of Mammalogists (ASM). 2025. Mammal Diversity Database (Version 1.13) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10595931. Online. Available: https://www.mammaldiversity.org/","shortCitationAuthor":"American Society of Mammalogists (ASM)","shortCitationYear":2025,"referenceCode":"W25ASM01NAUS","lastModified":"2025-04-04T21:45:15.526109Z"},{"id":103095,"citation":"Baird, R. W., and P. J. Stacey. 1991. Status of the northern right whale dolphin, <i>Lissodelphis borealis</i>, in Canada. Canadian Field-Naturalist 105:243-250.","shortCitationAuthor":"Baird and Stacey","shortCitationYear":1991,"referenceCode":"A91BAI02NAUS","lastModified":"2025-09-05T21:53:25.251014Z"},{"id":759420,"citation":"Bradley, R.D., L.K. Ammerman, R.J. Baker, L.C. Bradley, J.A. Cook. R.C. Dowler, C. Jones, D.J. Schmidly, F.B. Stangl Jr., R.A. Van den Bussche and B. Würsig. 2014. Revised checklist of North American mammals north of Mexico, 2014. Museum of Texas Tech University Occasional Papers 327:1-28. Available at: http://www.nsrl.ttu.edu/publications/opapers/ops/OP327.pdf","shortCitationAuthor":"Bradley et al.","shortCitationYear":2014,"referenceCode":"A14BRA01NACA","lastModified":"2020-02-25T14:38:17.880059Z"},{"id":132325,"citation":"Ferrero, R. C., and W. A. Walker. 1993. Growth and reproduction of the northern right whale dolphin, <i>Lissodelphis borealis</i>, in the offshore waters of the North Pacific Ocean. Can. J. Zool. 71:2335-2344.","shortCitationAuthor":"Ferrero and Walker","shortCitationYear":1993,"referenceCode":"A93FER01NAUS","lastModified":"2025-09-05T21:53:25.251014Z"},{"id":139149,"citation":"Gubbins, C. 2002. Use of home ranges by resident bottlenose dolphins (<i>Tursiops truncatus</i>) in a South Carolina estuary. Journal of Mammalogy 83: 178-187.","shortCitationAuthor":"Gubbins","shortCitationYear":2002,"referenceCode":"A02GUB01NACA","lastModified":"2024-11-02T00:42:23.119711Z"},{"id":215508,"citation":"Hiramatsu, K. 1991. Estimation of population abundance of northern right whale dolphin in the North Pacific using the by-catch data from the Japanese squid driftnet fishery. Paper J016. Appendix 6 in Anonymous (1991). Scientific review of North Pacific high seas driftnet fisheries, Sidney, British Columbia. 11-14 June 1991. Report for presentation to the United Nations pursuant to Resolutions 44/225 and 45/197. Canada Department of Fisheries and Oceans, Institute of Ocean Sciences, Sidney, British Columbia, Canada.","shortCitationAuthor":"Hiramatsu","shortCitationYear":1993,"referenceCode":"A91HIR01NAUS","lastModified":"2020-02-25T18:17:09.23027Z"},{"id":148475,"citation":"Jefferson, T. A., and M. W. Newcomer. 1993. <i>Lissodelphis borealis</i>. Am. Soc. Mamm., Mammalian Species No. 425:1-6.","shortCitationAuthor":"Jefferson and Newcomer","shortCitationYear":1993,"referenceCode":"A93JEF01NAUS","lastModified":"2025-09-05T21:53:25.251014Z"},{"id":156383,"citation":"Jones, J. K., Jr., R. S. Hoffman, D. W. Rice, C. Jones, R. J. Baker, and M. D. Engstrom. 1992a. Revised checklist of North American mammals north of Mexico, 1991. Occasional Papers, The Museum, Texas Tech University, 146:1-23.","shortCitationAuthor":"Jones et al.","shortCitationYear":1992,"referenceCode":"B92JON01NAUS","lastModified":"2020-02-25T14:38:17.880059Z"},{"id":102124,"citation":"Leatherwood, S., and R. R. Reeves. 1983. The Sierra Club handbook of whales and dolphins. Sierra Club Books, San Francisco. 302 pp.","shortCitationAuthor":"Leatherwood and Reeves","shortCitationYear":1983,"referenceCode":"B83LEA01NAUS","lastModified":"2020-02-25T14:38:17.880059Z"},{"id":215509,"citation":"Mangel, M. 1993. Effects of high-seas driftnet fisheries on the northern right whale dolphin <i>Lissodelphis borealis</i>. Ecological Applications 3:221-229.","shortCitationAuthor":"Mangel","shortCitationYear":1993,"referenceCode":"A93MAN02NAUS","lastModified":"2020-02-25T18:17:09.23027Z"},{"id":117022,"citation":"Wilson, D. E., and D. M. Reeder (editors). 1993. Mammal species of the world: a taxonomic and geographic reference. Second edition. Smithsonian Institution Press, Washington, DC. xviii + 1206 pp. Available online at: http://www.nmnh.si.edu/msw/.","shortCitationAuthor":"Wilson and Reeder","shortCitationYear":1993,"referenceCode":"B93WIL01NAUS","lastModified":"2020-02-25T14:38:17.880059Z"},{"id":477777,"citation":"Wilson, D. E., and D. M. Reeder (editors). 2005. Mammal species of the world: a taxonomic and geographic reference. Third edition. The Johns Hopkins University Press, Baltimore. Two volumes. 2,142 pp. [As modified by ASM the Mammal Diversity Database (MDD) at https://www.mammaldiversity.org/index.html]","shortCitationAuthor":"Wilson and Reeder","shortCitationYear":2005,"referenceCode":"B05WIL01NAUS","lastModified":"2022-07-02T00:44:59.638537Z"}],"otherCommonNames":[{"id":136250,"name":"Dauphin à dos lisse","language":"FR"},{"id":136251,"name":"Northern Right-whale Dolphin","language":"EN"}],"speciesGlobal":{"elementGlobalId":102213,"cites":{"id":2,"citesDescEn":"Appendix II","citesDescEs":"Apéndice II","citesDescFr":"Annexe II"},"cosewic":{"id":6,"cosewicDescEn":"Not at Risk","cosewicDescEs":"No está en riesgo","cosewicDescFr":"Non en péril","cosewicCode":"NAR"},"fwsRegion":null,"genusSize":{"id":2,"genusSizeDescEn":"Very small genus","genusSizeDescEs":"Un género muy pequeño","genusSizeDescFr":"Très petit genre"},"jurisEndem":{"id":5,"jurisEndemDescEn":"occurs (regularly, as a native taxon) in multiple nations","jurisEndemDescEs":"Se encuentra en varias naciones (de manera regular, como un taxón nativo)","jurisEndemDescFr":"Se trouve dans plusieurs nations (de façon régulière, tel un taxon indigène)"},"nomenclaturallyEst":null,"usesa":null,"informalTaxonomy":{"informalTaxonomyId":6,"level1":"Animals","level2":"Vertebrates","level3":"Mammals","level":3,"hasChildren":false,"parentId":2,"distributionStatus":"complete","displayOrder":1090},"parentSpecies":null,"infraspecies":false,"kingdom":"Animalia","phylum":"Craniata","taxclass":"Mammalia","taxorder":"Cetacea","family":"Delphinidae","genus":"Lissodelphis","americanFisheriesStatus":null,"americanFisheriesStatusDate":null,"saraStatus":null,"saraStatusDate":null,"cosewicDate":"1990-04-01","interpretedCosewic":null,"cosewicComments":"Reason for designation: Rare in Canadian waters; in the outermost limits of its normal distribution. No significant threats identified in Canadian waters.<br/><br/>Status history: Designated Not at Risk in April 1990.","usesaDate":null,"interpretedUsesa":null,"usesaComments":null,"completeDistribution":true,"synonyms":[],"infraspeciesList":[],"ebarId":null,"ebarCanadianScope":false,"ebarGlobalScope":false,"ebarKbaGroup":"Mammals","caGeneralStatusId":"GS001523"},"speciesCharacteristics":{"elementGlobalId":102213,"reproductionComments":"Newborn are most commonly reported in winter or early spring; sexually mature at length of about 2 m (Leatherwood and Reeves 1983, Jefferson and Newcomer 1993). Based on samples caught in squid driftnets in the central North Pacific, about half of females were mature; among mature females, 16% were pregnant, 3% were pregnant and lactating, 33% were post partum, 24% were lactating (no recent pregnancy), 10% were resting, and 14% were of unknown condition; gestation period was 12.1-12.3 months; calving appeared to peak in July and August; average of sexual maturity was 10 years; the oldest male was 27 years old, the oldest female 42 years old; minimum calving interval was 2 years (Ferrero and Walker 1993).","ecologyComments":"Travels in groups of up to several thousand; average group size about 100 (eastern Pacific) to 200 (western Pacific). Commonly associates with other cetaceans, especially the Pacific white-sided dolphin. Tends to avoid boats but may bowride. Fast swimmer.","habitatComments":"Relatively deep continental shelf and offshore waters with temperatures of 8-24 C (see Jefferson and Newcomer 1993). Favors deeper-water habitats but does approach shore at the heads of deep canyons, especially in winter (Leatherwood and Reeves 1983).","generalDescription":null,"diagnosticCharacteristics":null,"speciesMarineHabitats":[{"cagMarineHabId":-100446,"marineHabitat":{"id":1,"marineHabitatDescEn":"Pelagic","marineHabitatDescEs":"Pelágico","marineHabitatDescFr":"Pélagique","displayOrder":1}},{"cagMarineHabId":-100447,"marineHabitat":{"id":2,"marineHabitatDescEn":"Abyssal","marineHabitatDescEs":"Abisal","marineHabitatDescFr":"Abyssal","displayOrder":2}}],"speciesTerrestrialHabitats":[],"speciesRiverineHabitats":[],"speciesPalustrineHabitats":[],"speciesLacustrineHabitats":[],"speciesSubterraneanHabitats":[],"speciesEstuarineHabitats":[]},"primaryReference":{"id":1151804,"citation":"American Society of Mammalogists (ASM). 2025. Mammal Diversity Database (Version 1.13) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10595931. Online. Available: https://www.mammaldiversity.org/","shortCitationAuthor":"American Society of Mammalogists (ASM)","shortCitationYear":2025,"referenceCode":"W25ASM01NAUS","lastModified":"2025-04-04T21:45:15.526109Z"},"predecessors":[],"elementGlobalThreatAssessments":[{"elementGlobalThreatAssessId":16164,"iucnThreatCategory":{"id":19,"iucnThreatCategoryCd":"5","iucnThreatCategoryDescEn":"Biological resource use","iucnThreatCategoryDescEs":null,"iucnThreatCategoryDescFr":null,"displayValueEn":"5 - Biological resource use","displayValueEs":null,"displayValueFr":null,"displayOrder":330,"iucnThreat":"Y","parentThreatId":null,"iucnThreatLevel":1},"iucnThreatScope":null,"iucnThreatSeverity":null,"iucnThreatTiming":{"id":1,"iucnThreatTimingDescEn":"High: Continuing","iucnThreatTimingDescEs":null,"iucnThreatTimingDescFr":null,"displayValueEn":"High (continuing)","displayValueEs":null,"displayValueFr":null,"displayOrder":1},"threatImpactCalc":null},{"elementGlobalThreatAssessId":16165,"iucnThreatCategory":{"id":23,"iucnThreatCategoryCd":"5.4","iucnThreatCategoryDescEn":"Fishing & harvesting aquatic resources","iucnThreatCategoryDescEs":null,"iucnThreatCategoryDescFr":null,"displayValueEn":"5.4 - Fishing & harvesting aquatic resources","displayValueEs":null,"displayValueFr":null,"displayOrder":370,"iucnThreat":"Y","parentThreatId":19,"iucnThreatLevel":2},"iucnThreatScope":null,"iucnThreatSeverity":null,"iucnThreatTiming":{"id":1,"iucnThreatTimingDescEn":"High: Continuing","iucnThreatTimingDescEs":null,"iucnThreatTimingDescFr":null,"displayValueEn":"High (continuing)","displayValueEs":null,"displayValueFr":null,"displayOrder":1},"threatImpactCalc":null}]}