COMPARISON OF SHIP AND AERIAL SURVEYS OF SARDINE SCHOOLS

被引：3

作者：

HARA, I

机构：

[1] Seikai National Fisheries Research Institute

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1990年 / 28卷 / 04期

关键词：

Aerial survey; line transect; sardine; sonar;

D O I：

10.1109/TGRS.1990.572983

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Field tests were made to compare estimates of sardine schools resulting from simultaneous ship and aerial observations. The aerial/ship observations were performed around an area where large catches of sardine have been taken. In the surveyed area, the sardine schools can be sighted from the air and counted easily, making direct counting very advantageous. The schools are distinguished by their dark color against the lighter background of the ocean. A comparison of density estimated with the two types of survey are discussed here. Aerial counts of schools were 16.5% of those from the ship. This may be caused by the differences in visibility afforded by the two methods. Direct detection of schools and counting may be used more widely in the future. © 1990 IEEE

引用

页码：693 / 695

页数：3