Antarctic krill, Euphausia superba Dana (Crustacea Euphausiacea) under perennial sea ice in the western Weddell Sea.

  • Аннотация
  • Информация о публикации
  • Скачать текст
  • Публикации по аналогичной тематике
Melnikov I.A., Spiridonov V.V.

The results of underwater observations and sampling of krill (Euphausia superba) in the western Weddell Sea during the joint Russian-USA Ice Station WeddelM Expedition (11 February-9 June 1992) are presented. Krill was sampled from the same large ice floe composed of both 1- and 2-year ice as it drifted northward for a distance of с 700 km. Abundance estimates for krill under this floe were in the range 0.1-6.25 ind m**. Krill aggregate in areas where rafting of ice floes and formation of new ice occur, or around a protected diving hole. The krill sampled consisted mainly of furcilia б and post-larvae which did not belong to the 0+ group originating in this (1991-92) year, but presumably hatched in the summer season of 1990-91 and developed very slowly so that at the end of the following summer season, larval stages were still present in the population. No increase of the mean krill size was observed during 2.S months of observation. The role of larval advection for the maintenance of krill population in the Weddell Sea is discussed.

Received 5 May 1995, accepted IS Auguit 1996

Key words: Antarctic krill, Euphausia superba, larval development and growth, ice-water interface, Weddell Sea

Дополнительная информация

  • Авторы: Melnikov I.A. (P.P.Shirshov Institute for Oceanobgy, Russian Academy of Sciences), Spiridonov V.V. (Zoological Museum of Out Moscow Lomonosov State University)
  • Издание: "Antarctic Science", 8(4)
  • Год издания: 1996
  • Страницы: 323-329
  • Аннотация на английском языке: The results of underwater observations and sampling of krill (Euphausia superba) in the western Weddell Sea during the joint Russian-USA Ice Station WeddelM Expedition (11 February-9 June 1992) are presented. Krill was sampled from the same large ice floe composed of both 1- and 2-year ice as it drifted northward for a distance of с 700 km. Abundance estimates for krill under this floe were in the range 0.1-6.25 ind m**. Krill aggregate in areas where rafting of ice floes and formation of new ice occur, or around a protected diving hole. The krill sampled consisted mainly of furcilia б and post-larvae which did not belong to the 0+ group originating in this (1991-92) year, but presumably hatched in the summer season of 1990-91 and developed very slowly so that at the end of the following summer season, larval stages were still present in the population. No increase of the mean krill size was observed during 2.S months of observation. The role of larval advection for the maintenance of krill population in the Weddell Sea is discussed. Received 5 May 1995, accepted IS Auguit 1996 Key words: Antarctic krill, Euphausia superba, larval development and growth, ice-water interface, Weddell Sea
Скачать вложения:
Рейтинг@Mail.ru