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根据收集到的2000-2007年我国各渔业企业生产数据和卫星获取的叶绿素a浓度环境数据,分析了西南大西洋阿根廷滑柔鱼渔场的叶绿素a与渔场的分布特点及二者之间的关系。研究表明,近8a西南大西洋阿根廷滑柔鱼中心渔场均位于58°W~61°W、44S°~46°S海域,1~5月渔获量随月份的推移呈现季节性周期变化趋势,3月是渔汛期内的捕捞高峰期。研究海域内1~5月叶绿素a浓度基本在0.1~3mg/m3范围内变化,并随月份推移而降低。其中1~3月在50°S附近存在一高浓度叶绿素a的舌状带,由西南向东北伸展,月平均值较高(超过1mg/m3),4~5月高浓度舌状带逐渐消失,整个海域的叶绿素a保持较低的浓度,月平均值下降至0.5mg/m3左右。将叶绿素a浓度数据与单船捕捞量数据按照作业时间和作业渔区匹配插值,并对二者进行频次分析,结果表明渔区内叶绿素a浓度介于0.4~0.5mg/m3之间渔场出现频次最高,渔场出现频次总体上呈偏态分布。对渔获量、叶绿素a分月统计得到每月适宜捕捞作业的叶绿素a浓度范围,并通过K-S显著性检验。
Based on the collected environmental data of chlorophyll-a concentration in fishery production in our country from 2000 to 2007 and satellites collected from 2000 to 2007, the distribution characteristics of chlorophyll-a and fishing ground of the fishing ground of Illex argentius in Southwest Atlantic Ocean and the relationship between them were analyzed. The results showed that the fishing ground of C. glomerata in the past 8 years was located in the sea area of 58 ° W ~ 61 ° W and 44S ° ~ 46 ° S, and the catches from January to May showed seasonal changes with the increase of the month. 3 The month is the fishing peak during the fishing season. From January to May in the study area, the concentration of chlorophyll a basically changed in the range of 0.1 ~ 3mg / m3, and decreased with the passage of months. There was a high concentration of chlorophyll-a in the vicinity of 50 ° S from January to March, which extended from southwest to northeast, the monthly average was higher (more than 1mg / m3), and the high concentration of tongue-like zone gradually disappeared from April to May , Chlorophyll a throughout the sea to maintain a low concentration, the monthly average dropped to 0.5mg / m3 or so. The chlorophyll a concentration data and single-vessel catch data were interpolated according to the operation time and operation fishing area, and the frequency analysis of the two was conducted. The results showed that the frequency of chlorophyll-a concentration in fishing area was between 0.4 ~ 0.5mg / m3 The highest frequency of fishery appeared in general skewed distribution. On the catch, chlorophyll a monthly statistics obtained monthly suitable fishing operations chlorophyll a concentration range, and through K-S significant test.