2019 Volume 75 Issue 2 Pages I_486-I_491
In recent years, it is reported that the catch of short-neck clams Ruditapes philippinarum shows a decreasing trend year by year. The aim of this research is to develop a method to estimate suitable habitat for juvenile short-neck clams in a short period from multiple perspectives. As well as drone aerial analysis using UAV, grain size and X-ray fluorescence analyses of sediments were conducted to develop this method. A UAV camera with 20,000,000 pixels was used for drone aerial shooting, and a 3-dimensional model was made for GIS analysis to obtain ground information. Also, results of grain analysis were added to assure ground information. X-ray fluorescence was used to obtain sediment information. As a result of a multiple regression analysis by setting population of juvenile short-neck clams as the objective variable and ground and sediment information as the explanatory variable, correlation more than 0.6 was shown. According to these results, this method shows possibilities to estimate the population of juvenile short-neck clams in a short period from multiple perspectives.
