| 南极普里兹湾外海大磷虾分布与现存量 |
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| 引用本文： | 陈雪忠,徐震夷,陈冠镇.南极普里兹湾外海大磷虾分布与现存量[J].极地研究,1996,8(3):49-56. |
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| 作者姓名： | 陈雪忠 徐震夷 陈冠镇 |
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| 作者单位： | 中国水产科学研究院东海水产研究所 |
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| 摘 要： | 本文根据１９９１／１９９２、１９９２／１９９３年度在普里兹湾外海调查的资料，进行了大磷虾水平、垂直分布的研究和资源现存量的估算。结果表明，６３°～６７°Ｓ、６８°Ｅ沿线是大磷虾群分布较密集的海区，在调查海域内大磷虾群主要分布在７０ｍ以上的水层中。１９９１／１９９２，在１５０５３３．９ｋｍ２调查海域内的大磷虾资源现存量为１．６９９×１０６ｔ；１９９２／１９９３，在１２５７４０．７ｋｍ２调查海域内的大磷虾资源现存量为４．０４３×１０６ｔ。
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| 关 键 词： | 大磷虾 分布 现存量 普里兹湾 南极 |
THE DISTRIBUTION AND STANDING CROPS OF ANTARCTIC KRILL IN THE PRYDZ BAY REGION |
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| Chen Xuezhong,Xu Zhenyi and Chen Guanzhen.THE DISTRIBUTION AND STANDING CROPS OF ANTARCTIC KRILL IN THE PRYDZ BAY REGION[J].Chinese Journal of Polar Research,1996,8(3):49-56. |
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| Authors: | Chen Xuezhong Xu Zhenyi and Chen Guanzhen |
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| Abstract: | Based on the survey data carried out in the Prydz Bay region by the Southern Ocean Expedition of China during the austral summer of 1991/1992 and 1992/1993,this paper deals with the horizontal and vertical distribution and the estimation of the standing crops of Antarctic krill in the surveyed areas by using the integral system of relative quantitative assessment of the images recorded by echo sounders and the area method of the images recorded by trawling,respectively.The results are as follows: 1.The Antarctic krill were mainly distributed along the area of 63°-67°S,68°E during the period of investigation in summer of 1991/1992.The total area of the images of krill obtained from echo sounders in the five sub areas was 875134.42m 2,which accounted for 58.4% of the total area of the images.In 1992/1993,the main distributions of krill was along the areas of 63°￣66°S,68°E;65°￣67°S,73°E and 63°￣65°S,78°E,in which the total area of the images of krill aggregation was 276925.5m 2,or 61.15% of the total area of images of krill aggregation.The results of these two investigations and those of 1990/1991 showed that the denser area of krill aggregation was along the area of 63°￣67°S,68°E off the Prydz Bay.The reason for its aggregation has a relation to the existence of thermocline. 2.The investigation in 1991/1992 showed that the Antarctic krill aggregation was chiefly in the layers between 20m and 60m,with its image area representing 80.88% of the total image area.In 1992/1993 the survey indicated that the main distribution of Antarctic krill aggregation was in the layers between 10m and 50m,with its image area accounting for 87.18% of the total image area.The main krill aggregation occurred in the layer upper than 70m and had more regular pattern in vertical movements,that is,concentrating in the surface at night and surmerging to the deeper layer in the daytime. 3.The standing crops of Antarctic krill was 1.699×10 6 tons in the surveyed waters of 150533.9m 2 in area,and the distribution density was 22.99t/m 2 in area within three sub areas of the distribution of krill in the year 1991/1992.The standing crops in the 125740.7m 2 of surveyed areas was 4.043×10 6 tons,with an average of distribution density 32.15t/km 2 in 1992/1993. |
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| Keywords: | s Antarctic krill distribution standing crops Prydz Bay |
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