水产学报2018，Vol.42Issue(3)：356-365,10.DOI:10.11964/jfc.20161110607
基于点模式模型的南极半岛北部南极磷虾渔场的时空变动
Spatial-temporal variation on Euphausia superba fishing ground in the northern Antarctic Peninsula based on point pattern model
摘要
Abstract
As a key species in the Antarctic ecosystem, the spatial and temporal dynamics of Antarctic krill's fish-ing ground is becoming important issues for the role effects of krill's oceanic ecosystem function and resource management.Using multi-year Chinese krill fishery scientific data by month group,combining three spatial factors -longitude, latitude and offshore distance, the optimal point pattern model of monthly krill distribution and the vari-ance analysis results were obtained for the krill fishery in the northern Antarctic Peninsula based on the spatial point pattern method, and the possible potential fishing grounds were predicted based on the proposed optimal point pattern model. The results were: (1) In December, the greatest distance of fishing grounds to shore (45 km) can be found. Subsequently, the fishing grounds were gradually approaching coastline of the South Shetland Is-lands. By March the fishing grounds were at the least distance to the Antarctic Peninsula shoreline. After March, fishing ground gradually retreated from the coastal area, in April and May distance of fishing grounds to shore maintained about 13 km. (2) The variance analysis of the optimal point pattern model indicated the explained rates of variance to the model in December, January, March and April were 59%, 60%, 57% and 68%, respectively. Spatial factors can fit the distribution of krill fishing ground very well in these months. But in February and May, the explained rate of the variance to spatial point pattern model reduced to 38% and 32%, respectively. (3) Fishing grounds were located in the northern King George Island during austral summer (December to January).In Febru-ary, a secondary fishing ground was formed around the Livingston Island, and the third fishing ground occurred in the middle of the Bransfield Strait.During March-May fishing ground distributed along in the Bransfield Strait par-alleled to the Antarctic Peninsula. In conclusion, the offshore distance of the fishing ground coincided with the ex-tension and retreating of the sea ice boundary in the northern Antarctic Peninsula. The point pattern model of krill fishery based on spatial factors can well fit the temporal and spatial evolution of krill fishing ground in most months. Combined with the catch per fishing unit (CPUE), the point pattern model can be used as a potential tech-nique to explore the hotspot of krill aggregation.关键词
南极磷虾/空间要素/点模式模型/模拟/南极半岛北部Key words
Euphausia superba/spatial factors/point pattern model/simulation/the northern Antarctic Peninsula分类
农业科技引用本文复制引用
杨晓明,朱国平..基于点模式模型的南极半岛北部南极磷虾渔场的时空变动[J].水产学报,2018,42(3):356-365,10.基金项目
国家科技支撑计划(2013BAD13B03) （2013BAD13B03）
国家自然科学基金(41776185) （41776185）
公益性行业(农业)科研专项(201203018) （农业）
教育部留学回国人员科研启动基金 National Key Technology R&D Program the Ministry of Science and Technology of China(2013BAD13B03) （2013BAD13B03）
National Natural Science Foundation of China(41776185) （41776185）
Special Fund for Argo-scientific Re-search in the Public Interest of China(201203018) （201203018）
Scientific Research Foundation for the Returned Overseas Chinese Scholars of the Education Ministry （）
