For how to collect samples of soil animals. To keep the example with the loader tool adapted from the Petersen's Grab, then a sample of soil collected each time. Sift through a sieve, sift the eye size and frequency of 5, 10, 1 mm, respectively, by extracting the samples come out and remove the animal preservation with fomalin a 10% concentration of the soil type, color, and save the other elements in the soil. Differentiate the types of sea animals in soil samples, levels, Wong (Family) for the density of benthic marine animals. Calculate the average density for each station. Find out the average density at each station as the number per square metre. And biomass of benthic marine animals as wet weight is grams per square metre. To analyze a group of marine benthic animals found in each group.
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