A method suitable for monitoring and counting large water surface group of silver carp

Abstract

The present application relates to the technical field of fishery resources monitoring, in particular to a method suitable for big water surface group monitoring and counting of aar fish, according to the type of water area, the grid dynamic distribution of acoustic signal receiving station is carried out, the joint positioning method of more than three points based on TDOA, combined with the weighted least square method to calculate the accurate coordinate of the marked aar fish, and the behavior of the aar fish is judged, so as to master the activity area of the individual fish after the individual fish cluster through the marking of the individual fish, combined with the water depth, water temperature and water quality data, the characteristics of the fish habitat are obtained, and the fish activity range and rule are obtained. Based on the behavior habit of fish, the monitoring range is divided, the population monitoring and counting are carried out through the fish sonar scanning, the problems of big water surface fish population monitoring difficulty and fish population repeated counting are reduced, and the precision of the monitoring and counting result is improved. The scheme of the present application has the characteristics of non-damage, full coverage, high precision and standardization, and is suitable for big water surface aar fish resource investigation, evaluation of aar fish population release effect and ecological fishery management.

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