Method for measuring quantity of fish resources in natural water area

The invention relates to a method for measuring quantity of fish resources in a natural water area, which comprises the following steps of: establishing a measured fish biological index database through high-frequency on-site multi-point sampling in a natural water area; secondly, calculating the annual resource quantity of specific target fishes by adopting an actual population module VPA in professional fishery evaluation software FiSAT II derived by grain and agricultural organization of the United National, and finally calculating the resource quantity of a single species by adopting a hydroacoustic detection conclusion and combining with the total proportion of the quantity of the single species in fish resource survey sampling. The accuracy and reliability of estimation can be further verified, an efficient and reliable path is provided for natural water area fish resource quantity measurement, and the measurement result is closer to the survival condition of natural water area fish actual resource quan