| 摘要: |
| 根据2005年3～12月14艘中国渔船在智利外海的竹筴鱼生产统计数据和卫星遥感反演的海表温度、叶绿素浓度，分析智利外海竹筴鱼中心渔场的时空变动以及渔场与环境因子的关系。结果表明，随着南半球秋季转入冬季，竹筴鱼中心渔场相应地由南向北、由东向西推移，10月份渔场达到最北端，春末夏初开始南撤；智利外海竹筴鱼渔场的表层水温大致为12～16℃，中心渔场为14～15℃，月间略有差异；渔场的叶绿素质量浓度大致为0.06～0.12 mg/m3，当渔场的叶绿素质量浓度处于0.08～0.10 mg/m3时，渔船作业频次和竹筴鱼产量最高。
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| 关键词: 智利竹筴鱼(Trachurus murphyi) 中心渔场 海表温度 叶绿素质量浓度 |
| DOI： |
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| 基金项目:国家科技支撑计划资助项目(2006BA09A05)；农业部海洋渔业资源可持续利用重点开放实验室开放课题(实开2005-09)；基本科研业务费专项资金资助项目(2007-qn-03) |
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| Preliminary study on spatio-temporal change of central fishing ground of chilean jack mackerel (Trachurus murphyi) in the offshore waters of Chile |
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NIU Ming-xiang,LI Xian-sen,XU Yu-cheng
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| Abstract: |
| According to the statistical data of chilean jack mackerel (Trachurus murphyi) fishing yield of 14 Chinese vessels , the data of SST (sea surface temperature) and Chl-a (Chlorophyll-a) obtained by satellite remote sensing from Mar. to Dec. 2005 in the offshore waters outside Chile 200 miles exclusive economic zone. The change of central fishing ground and relationship between chilean jack mackerel and ocean environment factors (SST,Chl-a) were analyzed. The results showed that the central fishing ground was moved from the south to the north, from the east to the west with autumn changing to winter, and it withdrew to the south after Oct. The favorable SST range of the fishing grounds was 12～16℃ and favorite SST was 14～15℃ with a little difference every month. The scope of Chl-a concentration was about 0.06～0.12 mg/m3, but both jack mackerel yield and appearing frequency of fishing ground were the highest in the range 0.08～0.10 mg/m3 of Chl-a.
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| Key words: chilean jack mackerel (Trachurus murphyi) central fishing ground sea surface temperature chlorophyll-a |
