Program for Measuring Length and Evaluating Different Sizes Post Larvae of Pacific White Shrimp (Litopenaeus vannamei ) and Giant Freshwater Prawn (Macrobrachium rosenbergii) from Digital Image
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A specific program for measuring length of post larval pacific white shrimp and giant freshwater prawn was developed and was used to evaluate different sizes of them. The accuracy was depended on quality of image. Whenever, the image was clear, the program could quickly and accurately calculate for mean, standard deviation, percentage of coefficient of variation (percentage of different sizes), minimum length and maximum length. Moreover, the program could be applied for a large number of post larvae by no effect on them. By using this specific program, it showed more than 97 % of an accuracy and more quickly than 5 times to take time a compared with actual post larvae length. Therefore, it is highly possible to be used in shrimp hatchery.