《Table 1 Species and quantity of fishes subjected to microscopic exami-nation》

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《Investigation and Preventive Measures of Fish Parasites in Huaihua City》

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The waters in the 13 counties，cities and districts of Huaihua City were surveyed.The common economic fishes in three natural waters of each county/city/district were investigated.The common fishes in the waters of Huaihua City were investigated one by one.For each natural water and each fish in each pond，at least 10 fish were subjected to microscopic examination.For each adult fish，at least 3-5 fish were subjected to microscopic examination.A total of 411 fish，belonging to 10 species（Table 1）were investigated.