Based on the samples collected from 4 austral summer sampling cruises from 1989/1990 to 1992/1993 in the Prydz Bay region,the Indian sector of the Southern Ocean,the number and development phase composition of ovarian oocytes in gravid females of Antarctic krill, Euphausia superba Dana,and the relations of the number of ovarian oocytes with body weight and body length were studied.

The spawning habits including brood size,the number of broods,ovarian development of spawned females of 53 gravid females of Antarctic krill, Euphausia superba Dana,were investigated on board ship JiDi during the austral summer of 1992/1993 in the Prydz Bay region,the Indian sector of the Southern Ocean.

Quantitative distribution of euphausiids in the Yellow Sea and the East China Sea in spring and autumn in relation to the hydrographic conditions;

Distribution patterns of pelagic euphausiids in the East China Sea;

The dominant species of euphausiids in the east China sea and their ecological adaptability;

Abundance distribution of Euphausiids in the East China Sea;

Antarctic Krill ( Euphausia superba ) were collected from the Prydz Bay region during the austral summer of 1999/2000.

To reveal mitochondrial genomic characteristics of Euphausia superba(Crustacea:Malacostraca:Euphausiacea) and potential molecular markers, the mitochondrial genomes of E.