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Zabavnikov_Zyryanov et al_Distribution and number of marine mammals.pdf (3.005Mb)

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Distribution and number of marine mammals in the open Barents Sea and their connection

with capelin and polar cod distribution.

V. Zabavnikov*, S. Ziryanov*, V. Tereschenko*, K. Nilssen** and U. Lindstrøm**

*Polar Institute of Fisheries and Oceanography (PINRO), Murmansk, Russia

**Institute of Marine Research, Bergen, Norway

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Situation of transects of air surveys 2001-2004.

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Distribution of capelin and marine mammals in the open part of the Barents Sea during autumn 2001.

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Distribution of polar cod and marine mammals in the open part of the Barents Sea during autumn 2001.

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Distribution of capelin and marine mammals in the open part of the Barents Sea during autumn 2002.

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Distribution of polar cod and marine mammals in the open part of the Barents Sea during autumn 2002.

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Distribution of capelin and marine mammals in the open part of the Barents Sea during autumn 2003.

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Distribution of polar cod and marine mammals in the open part of the Barents Sea during autumn 2003.

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Distribution of capelin and marine mammals in the open part of the Barents Sea during autumn 2004.

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Distribution of polar cod and marine mammals in the open part of the Barents Sea during autumn 2004.

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Main results of air surveys:

• - relative increase in numbers and extension of areal’s size for humpback, minke whale and Atlantic white-beaked dolphin;

• - distribution of cetaceans in the Barents Sea in most cases depend of capelin’s abundance, and more less than polar cod;

• - at present, the trophic role of marine mammals in the ecosystem of the Barents Sea maybe very considerable;

• - need further investigations of marine mammals of Barents Sea, especially nutrition,

and special air surveys.

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