TERRAPUB Journal of Oceanography

Journal of Oceanography, Vol. 58 (No. 2), pp. 295-303, 2002


Vertical Distribution of Gelatinous Macroplankton in the North Pacific Observed by Manned Submersibles Mir-1 and Mir-2

Mikhail E. Vinogradov* and Elvira A. Shushkina

P.P. Shirshov Institute of Oceanology, Nakhimovsky prosp. 36, Moscow 117851, Russia

(Received 15 January 2001; in revised form 20 June 2001; accepted 8 July 2001)

Abstract: The vertical distribution of several medusa species in the Kurile-Kamtchatka region of the Pacific Ocean is described. Animals were observed in the light cone from deep-sea submersibles Mir-1 and Mir-2 throughout the water column, from the surface to 5000-6000 m at four different sites. Bathy- and abyssopelagic species are noted along with the species living in an extremely wide depth range. A faunistic border is revealed at a depth of 3000 m. The contribution of gelatinous animals (medusae, siphonophores, salps) to the total deep-sea plankton biomass was estimated using a wire reference cube during nine dives in the highly productive areas of the north-west Pacific, eastern Pacific (California, Costa-Rica Dome), and subtropical oligotrophic areas.

*Corresponding author E-mail: michvin@sio.rssi.ru

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