极地研究Issue(3)：306-315,10.DOI:10.13679/j.jdyj.2014.3.306
2009／2010-2011／2012年度夏秋季南奥克尼群岛水域南极磷虾捕捞群体年龄结构时空变化
SPATIAL-TEMPORAL VARIATION IN POPULATION AGE STRUCTURE OF FISHERY-TARGETED ANTARCTIC KRILL(EUPHAUSIA SUPERBA) AROUND THE SOUTH ORKNEY ISLANDS IN AUSTRAL SUMMER-FALL DURING 2009/2010 AND 2011/2012
摘要
Abstract
We used biological data on Antarctic krill ( Euphausia superba Dana ) , collected by fishery observers of the Antarctic krill fishery , to investigate the spatial-temporal variation in age structure .The study area was divided into small-scale units with a spatial resolution of 30 minutes ( latitude ) by 1 degree ( longitude ) .The results showed that in 2009/2010 the standard length ( SL) of Antarctic krill ranged from 33.2 to 69.0 mm, and the mean SL and dominant SL range were 51.8 mm and 52-60 mm (52.3%), respectively.A sub-modal range of 44-48 mm was also identified.In 2010/2011, the SL ranged from 22.9 to 59.3 mm, and the mean SL and dominant SL range were 44.5 mm and 42-50 mm (56.8%), respectively, and in 2011/2012, the SL ranged from 18.5 to 59.4 mm, and the mean SL and dominant SL range were 41.7 mm and 36-46 mm (67.3%), respectively.Among the three years, there was a significant variation in SL (p<0.001) and no similarity in length frequency distribution (PSI=41.25-73.42).Clustering analysis showed that SL classes could be divided into three groups among 10 days in a month during 2009/2010 to 2011/2012.The SL classes could be classified into groups based on the first 10 days in February 2011 and the middle 10 days in March 2012, on the last 10 days in January to the middle 10 days in February 2010 and the middle 10 days in February 2011.The other SL classes could be classified into an-other group .Age 1+and 2+Antarctic krill occurred in waters close to the South Orkney Islands , while age 4+Antarctic krill were found in waters further from the Islands .关键词
南极磷虾/南奥克尼群岛/捕捞群体/年龄结构/时空变化Key words
Antarctic krill/South Orkney Islands/fishery-targeted population/age structure/temporal-spatial variation引用本文复制引用
朱国平,朱小艳,李莹春,徐怡瑛,夏辉,徐鹏翔,许柳雄..2009／2010-2011／2012年度夏秋季南奥克尼群岛水域南极磷虾捕捞群体年龄结构时空变化[J].极地研究,2014,(3):306-315,10.基金项目
公益性行业（农业）科研专项（201203018）、国家科技支撑计划项目（2013BAD13B03）、国家海洋局极地科学重点实验室开放基金项目（KP201210）和上海海洋大学“海鸥计划”项目（B-5003-11-0023）联合资助 （）
