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Gray whale (Eschrichtius robustus) in the Mediterranean Sea: anomalous event or early sign of climate-driven distribution change?

  • Aviad P. Scheinin (a1), Dan Kerem (a1), Colin D. MacLeod (a2), Manel Gazo (a3) (a4), Carla A. Chicote (a3) and Manuel Castellote (a5)...
Abstract

On 8 May 2010, a gray whale was sighted off the Israeli Mediterranean shore and twenty-two days later, the same individual was sighted in Spanish Mediterranean waters. Since gray whales were last recorded in the North Atlantic in the 1700s, these sightings prompted much speculation about this whale's population origin. Here, we consider three hypotheses for the origin of this individual: (1) it represents a vagrant individual from the larger extant population of gray whales found in the eastern North Pacific; (2) it represents a vagrant individual from the smaller extant population found in the western North Pacific; or (3) it represents an individual from the previously thought extinct North Atlantic population. We believe that the first is the most likely, based on current population sizes, on known summer distributions, on the extent of cetacean monitoring in the North Atlantic and on the results of a performed route analysis. While it is difficult to draw conclusions from such singular events, the occurrence of this individual in the Mediterranean coincides with a shrinking of Arctic Sea ice due to climate change and suggests that climate change may allow gray whales to re-colonize the North Atlantic as ice and temperature barriers to mixing between northern North Atlantic and North Pacific biomes are reduced. Such mixing, if it were to become widespread, would have implications for many aspects of the marine conservation and ecology of these two regions.

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Corresponding author
Correspondence should be addressed to: A.P. Scheinin, Israel Marine Mammal Research and Assistance Center (IMMRAC), The Leon Recanati Institute for Maritime Studies and Department for Maritime Civilizations, The University of Haifa, Mount Carmel, Haifa 31905, Israel email: scheinin@research.haifa.ac.il
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A.A. Berzin (1984) Soviet studies on the distribution and numbers of gray whale in the Bering and Chukchi Seas from 1968 to 1982. In M.L. Jones , S.L. Swartz and S. Leatherwood (eds) The gray whale, Eschrichtius robustus. Orlando, FL: Academic Press, pp. 409419.

J.S. Dunham and D.A. Duffus (2001) Foraging patterns of gray whales in central Clayoquot Sound, BC, Canada. Marine Ecology Progress Series 223, 299310.

K.R. Hayes and C. Sliwa (2003) Identifying potential marine pests—a deductive approach applied to Australia. Marine Pollution Bulletin 46, 9198.

K.L. Laidre , I. Stirling , L.F. Lowry , Ø. Wiig , M.P. Heide-Jørgensen and S.H. Ferguson (2008) Quantifying the sensitivity of Arctic marine mammals to climate-induced habitat change. Ecological Applications 18 (Supplement), S97S125.

B.R. Mate and J.T. Harvey (1984) Ocean movements of radio-tagged gray whales. In M.L. Jones , S.L. Swartz and S. Leatherwood (eds) The gray whale, Eschrichtius robustus. Orlando, FL: Academic Press, pp. 577589.

J.G. Mead and E.D. Mitchell (1984) Atlantic gray whales. In M.L. Jones , S.L. Swartz and S. Leatherwood (eds) The gray whale, Eschrichtius robustus. Orlando, FL: Academic Press, pp. 3353.

S.E. Moore , J.M. Grebmeier and J.R. Davies (2002) Gray whale distribution relative to forage habitat in the northern Bering Sea: current conditions and retrospective summary. Canadian Journal of Zoology 81, 734742.

S.E. Moore , K.M. Wynne , J.C. Kinney and J.M. Grebmeier (2007) Gray whale occurrence and forage southeast of Kodiak Island, Alaska. Marine Mammal Science 23, 419428.

S.E. Moore and H.P. Huntington (2008) Arctic marine mammals and climate change: impacts and resilience. Ecological Applications 18, 157165.

M. Nerini (1984) A review of gray whale feeding ecology. In M.L. Jones , S.L. Swartz and S. Leatherwood (eds) The gray whale, Eschrichtius robustus. Orlando, FL: Academic Press, pp. 423450.

D.J. Rugh and M.A. Fraker (1981) Gray whale (Eschrichtius robustus) sightings in Eastern Beaufort Sea. Arctic 34, 186187.

G.M. Ruiz , J.T. Carlton , E.D. Grosholz and A.H. Hines (1997) Global invasions of marine and estuarine habitats by non-indigenous species: mechanisms, extent, and consequences. American Zoologist 37, 621632.

J.J. Stachowicz , J.R. Terwin , R.B. Whitlatch and R.W. Osman (2002) Linking climate change and biological invasions: ocean warming facilitates nonindigenous species invasions. Proceedings of the National Academy of Sciences of the United States of America 99, 1549715500.

S.L. Swartz , B.L. Taylor and D.J. Rugh (2006) Gray whale Eschrichtius robustus population and stock identity. Mammal Review 36, 6684.

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Marine Biodiversity Records
  • ISSN: -
  • EISSN: 1755-2672
  • URL: /core/journals/marine-biodiversity-records
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