The invention relates to the technical field of
animal resource density survey, in particular to a
mangrove forest swimming
animal resource density quantitative survey device which comprises a net opening, mounting supports are mounted on two sides of the lower end of the net opening through detachable connectors, a net is fixedly connected to one side end face of the net opening, the net is conical, and a collecting bag is mounted at the
tail end of the net. A second fixing sleeve and a first fixing sleeve are fixedly connected to the middle of the netting and the side, close to the net opening, of the netting correspondingly, an anti-escape
assembly is arranged in the second fixing sleeve and used for preventing the swimming animals entering the netting from escaping from the net opening, a fixing support is fixedly connected to the inner wall of the first fixing sleeve, and the fixing support is fixedly connected to the inner wall of the first fixing sleeve. A
servo motor is arranged on the end face of one side of the fixing support. Compared with the prior art, the method solves the problems that a trawl method cannot be used due to
plant obstruction during quantitative investigation of the nekton in the
mangrove forest, the trawl method damages the collected nekton, the sampling efficiency is low, and the error is large.