A Preliminary Study On The Feeding And Visual Behavior Of Haiyan Asteridea

In order to study the food consumption,preference and day-night predatory differential of Asteridea to Ruditapes philippinarum by watching the sink at laboratory.Based on color selection,color acclimatization and visual memory of Asteridea to four coloured paper(black,red,blue,green),to provide scientific advice for Culture size of Ruditapes philippinarum,and Providing scientific methods and measures for Prevention of Asteridea.The main research contents and results are as follows:(1)Based on Sink Experiment analyzed and researched,three kinds of petrels(wrist length is 4.0-5.0 cm,6.0-7.0 cm,8.0-9.0 cm)were fed to three kinds of clams(shell length is 1.0 cm,2.0 cm,3.0 cm respectively).In order to study the food consumption,preference and day-night predatory differential of three specifications Asteridea to three specifications Ruditapes philippinarum by Data analysis.he result shows: The nighttime feeding rate of Asteridea was significantly higher than that of daytime feeding rate,the results of three different specifications of the experimental group and the control group were the same.With the increase of Asteridea size,the feeding rate of petrels to three specifications of R.Philippine clams increased,the feeding rate of 1.0cm and 2.0cm clams in R.Philippine decreased gradually,the feeding rate of 3.0 cm clams in R.Philippine increased gradually,The maximum feeding rate of Asteridea to 1.0 cm R.Philippine clams was 80% on the first day,to 2.0cm was 46.67% on 6th day,to 3.0cm was 30.77% on 7th day.When culturing clams in the Philippines,we should try to select the shell length of more than 2.0 cm to proliferate,so as to ensure higher economic benefits.(2)The color selection of sea petrels was analyzed by using four colours of black,red,blue and green flumes,and the feeding domestication of sea petrels by four colours of black,red,blue and green was carried out respectively.The results showed that the petrel had a certain tendency to the four colors of black,blue,red and green.The residence time in different color areas was different,and the color selection tended to be black > Blue > Red > green.Geomagnetism and light shadows do not change the choice of these four colors for sea petrels.Four colors are used to domesticate sea petrels.Red and blue stay longer with the time of domestication.Black and green domestication results are unsatisfactory.With the time of domestication,sea petrels stay longer in these two color areas.The domestication effect showed that the domestication effect of red was more obvious than that of blue,and the petrels had certain visual memory ability for red and blue.