摘要
介绍了渔业资源声学评估的国内外研究现状,基本工作原理,声学仪器,声学评估的主要工作过程。其中重点介绍了声学调查与评估,它包括调查设计、数据采集、目标强度确定、映像分析、数据处理、生物量计算等。最后指出了目前渔业资源声学评估工作中尚待解决的若干问题,例如在各鱼种积分值分配问题上,很大程度取决于生物学取样网次中渔获物的组成比例,以及在各个水层中存在不同的非生物或者非调查种类的生物将影响回波信号以及探鱼仪映像的形成,这些都需要渔业工作者在对比研究的基础上予以辨别后,再对数据和映像进行预处理等。并提出了未来发展方向的展望。
The development of the acoustic method in fishery resources survey at home and abroad, the basic principles, apparatus, and the main working process were described in this paper. Emphasis is placed on the acoustic survey, which includes survey design, acoustic instrument calibration, survey data collection, fish target strength determination, echogram scrutinizing, data processing and fish biomass estimation. Finally, it discussed the bottlenecks and pitfalls in the current application of acoustic survey, such as integral data allot and noninvestigating species interfering. Integral data allot was mainly determined by sample collecting and its constitute, the echo signal and echogram could be interfered by some other species who existed in different levels of ocean. These problems can only be resolved after fishery scientists data processing and echogram scrutinizing at the basis of contrast and research of the fish distribution, then it brought forward the prospect of acoustic survey development.
出处
《上海水产大学学报》
CSCD
2003年第1期40-44,共5页
Journal of Shanghai Fisheries University
关键词
声学评估
渔业资源
资源量
acoustic survey
fishery resources
biomass
