极地研究2011，Vol.23Issue(4)：275-282,8.DOI:10.3724/SP.J.1084.2011.00275
2002年1月份南极普里兹湾海域南极磷虾(Euphausia superba Dana)的丰度和种群结构研究
DISTRIBUTION AND DEMOGRAPHY OF EUPHAUSIA SUPERBA DANA IN PRYDZ BAY DURING JUNUARY 2002
摘要
Abstract
This study documents the horizontal distribution and demography of Antarctic krill (Euphausia superba Dana) , which were collected by IKMT along three transects from Prydz Bay during January 2002. E. Superba were abundant south of 64°S, and few krill were found north of 64°S. The average density/biomass, estimated from trawl catches, was 68. 85 ind · 1 000 m-3 or 24.16 g · 1 000 m-3. The four stations recording the highest values were located in the open sea. Body length ranged from 30 to 55 mm ( N = 1 758 ) , with a mean of 38. 45 ± 3. 68 mm (SD). The overall sex ratio was 1:1; there were 47. 6% females (31.9% sub-adults and 5. 7% adults) , 46.6% males (42. 7% sub-adults and 3. 9% adults) , and 5. 8% juveniles. The population structure of E. Superba showed geographical differences. A high proportion of juveniles, low sexual maturity of males and good growth conditions were found in the western part of the survey area, and the reverse was found in the eastern part. A latitudinal difference was found at stations along 70. 5°E and 73°E where the body length was short and the sex ratio was high at high latitude, and the opposite at low latitude.关键词
南极磷虾/分布/丰度/种群结构/普里兹湾Key words
Euphausia superba, distribution, density, population structure, Prydz Bay引用本文复制引用
刘永芹,孙松,张永山,刘会莲..2002年1月份南极普里兹湾海域南极磷虾(Euphausia superba Dana)的丰度和种群结构研究[J].极地研究,2011,23(4):275-282,8.基金项目
国家创新研究群体科学基金(40821004)和国际极地年中国行动计划资助 （40821004）
