Tematica Mammiferi marini

Lissodelphis borealis Peale, 1848

Phylum: Chordata Haeckel, 1874

Classe: Mammalia Linnaeus, 1758

Ordine: Cetartiodactyla Montgelard et al., 1997

Famiglia: Delphinidae Gray, 1821

Genere: Lissodelphis Gloger, 1841

Descrizione

È l'unico delfino del Pacifico del Nord che non possiede la pinna dorsale, caratteristica che lo contraddistingue da altri cetacei. Per via del suo movimento a salti, a volte viene confuso con un leone marino o una foca. Acrobata per natiura, esegue il breaching, il lobtailing o altre acrobazie, come ricadere sul ventre, o colpire l'acqua con un fianco (il lissodelfino fa lo stesso quando si sente minacciato).

Diffusione

Lo si riscontra nel Nord Pacifico occidentale, dalla Kamcatka, in Russia, al Giappone e nel Nord Pacifico orientale, dalla Columbia Britannica, in Canada, al nord del Golfo di California, in Messico e nel Mare del Giappone settentrionale.

Bibliografia

–Braulik, G. & Jefferson, T.A. (2018). "Lissodelphis borealis". The IUCN Red List of Threatened Species. 2018.
–"Lissodelphis borealis (Peale, 1848)". Integrated Taxonomic Information System.
–Jefferson, Thomas A.; Newcomer, Michael W. (23 April 1993). "Lissodelphis borealis". Mammalian Species (425): 1-6.
–Jeffersen, Thomas; Newcomer; Leatherwood; Waerebeek (1994). Ridgway and Harrison (ed.). Handbook of Marine Mammals. London: Academic Press. pp. 335-362.
–Leatherwood; Walker (1979). Winn and Olla (ed.). Behaviour of Marine Animals. New York: Plenum Press. pp. 85-141.
–Lipsky, Jessica (2009), "Right whale dolphins", Encyclopedia of Marine Mammals, 2, Elsevier, pp. 958-962.
–"Northern Right Whale Dolphin". NOAA Fisheries. Retrieved 7 October 2019.
–Smultea, Mari A; Bacon, Cathy E; Lomac-MacNair, Kate; Visser, Fleur; Bredvik, Jessica (2014). "Rare Mixed-Species Associations Between Sperm Whales and Risso's and Northern Right Whale Dolphins Off the Southern California Bight: Kleptoparasitism and Social Parasitism?". Northwestern Naturalist. 95 (1): 43-49.
–Larese, Jason P.; Chivers, Susan J. (2009). "Growth and reproduction of female eastern and whitebelly spinner dolphins incidentally killed in the eastern tropical Pacific tuna purse-seine fishery". Canadian Journal of Zoology. 87 (6): 537-552.
–Green; Brueggeman; Grotefendt; Bowlby; Bonnell; Balcomb (1992). "Cetacean distribution and abundance off Oregon and Washington". Oregon and Washington Marine Mammal and Seabird Surveys.
–Forney, Karin A.; Barlow, Jay (1998). "Seasonal Patterns in the Abundance and Distribution of California Cetaceans, 1991–1992". Marine Mammal Science. 14 (3): 460-489.
–Barlow, Jay (February 2016). Cetacean abundance in the California current estimated from ship-based line-transect surveys in 1991-2014 (PDF) (Report). NOAA Southwest Fisheries Science Center. Administrative Report LJ-2016-01.
–Ulla Christina Ludewig & Vanessa Williams-Grey (2019). A Guide to Responsible Whale Watching (PDF) (Report). WDC, Whale and Dolphin Conservation.
–Rankin, Shannon; Oswald, Julie; Barlow, Jay; Lammers, Marc (2007). "Patterned burst-pulse vocalizations of the northern right whale dolphin, Lissodelphis borealis". The Journal of the Acoustical Society of America. 121 (2): 1213-1218.
–Oswald, Julie N.; Rankin, Shannon; Barlow, Jay (1 September 2008). "To Whistle or Not to Whistle? Geographic Variation in the Whistling Behavior of Small Odontocetes". Aquatic Mammals. 34 (3): 288-302.
–Leduc, R. G.; Perrin, W. F.; Dizon, A. E. (1999). "Phylogenetic Relationships Among the Delphinid Cetaceans Based on Full Cytochrome B Sequences". Marine Mammal Science. 15 (3): 619-648.
–Vollmer, Nicole L.; Ashe, Erin; Brownell, Robert L.; Cipriano, Frank; Mead, James G.; Reeves, Randall R.; Soldevilla, Melissa S.; Williams, Rob (2019). "Taxonomic revision of the dolphin genus Lagenorhynchus". Marine Mammal Science. 35 (3): 957-1057.
–Dizon (1994). "Intraspecific structure of the northern right-whale dolphin (Lissodelphis borealis): The power of an analysis of molecular variation for differentiating genetic stocks". CalCOFI Rep. 35: 61-67.
–Elizabeth A. Becker; et al. (October 2012). Predictive modeling of cetacean densities in the California Current ecosystem based on summer/fall ship surveys in 1991-2008 (PDF). NOAA Technical Memorandum NMFS (Report).
–Mangel, Marc (1993). "Effects of High-Seas Driftnet Fisheries on the Northern Right Whale Dolphin Lissodelphis Borealis". Ecological Applications. 3 (2): 221-229.

	Data: 04/08/2009 Emissione: Delfini Stato: Micronesia

	Data: 24/07/2013 Emissione: Delfini Stato: Tuvalu Nota: Emesso in un foglietto di 4 v. diversi

	Data: 10/04/2014 Emissione: Vita nel mare - Delfini Stato: Togo Nota: Emesso in un foglietto di 4 v. diversi

	Data: 22/12/1995 Emissione: Delfini e balene Stato: Gambia Nota: Emesso in un foglietto di 9 v. diversi

	Data: 16/04/2018 Emissione: Vita Marina - I delfini Stato: Guinea-Bissau Nota: Emesso in un foglietto di 5 v. diversi