The effect of different artificial substrates on the inhabitation taxis of sea cucumber Apostichopus japonicus

By calculating and analyzing the average gathered number of unit volume (AGNUV) and the mean attractive rate (MAR) on ten types of artificial substrates and 8 distributional areas, the inhabitation taxis and selection of Apostichopus japonicus was estimated. The results showed that the attractive effect of 10 substrates was in the following descending order. big poly-arris tile, stone, three-hole brick, small poly-arris tile, U-shaped the, eddy abnormity tile, triangle tile, cage substrate, sunshade net and bamboo substrate. There was significant difference between the big poly-arris tile and eddy abnormity tile, triangle tile, cage substrate, sunshade net and bamboo substrate. It also showed that the MAR of pool edge angle (21.02%) was higher than that of pool wall (8.23%) and pool bottom surface (15.68%), while the MAR underneath and inside of substrate was respectively higher than that of upside and surface. In addition, the experimental test approved the following, (1) The big poly-arris tile had the best