Apparatus for carp in-advance concentration oviposition and collection

Abstract

The invention provides an apparatus for carp in-advance concentration oviposition and collection. A plurality of fish-egg collectors are disposed in a net cage of the apparatus; each fish-egg collector is provided with an annular framework; a plurality of fish nests are formed in the framework; under the framework is provided an egg carrying net sheet; and the egg-carrying sheet is connected with the framework via a rope. The apparatus for carp in-advance concentration oviposition and collection is placed in a cultivation water area, so parent fishes can be placed in the net cage and lay eggs, and eggs can be collected; the same group parent fishes can lay eggs in advance in the net cage than in an original pond; when the parent fishes lay eggs in the framework or beside the framework, a possibility that the eggs are attached to the fish nests is increased compared to a normal rodlike fish nets; the eggs not attached to the fish nests fall on the egg carrying net sheet or in the net cage; when the parent fishes lay eggs beside the net cage, the eggs can be attached to the side surface of the net cage or on the bottom of the net cage, so the eggs can be collected or nearly all eggs can be collected; the parent fishes lay eggs in concentrated time in the net cage; and after egg laying, the eggs can be conveniently transported and small damage is caused.

Description

technical field [0001] The invention relates to an aquaculture device, in particular to a carp concentrated spawning and collecting device in advance. Background technique [0002] At present, the method of collecting fish eggs in the carp breeding season is as follows: use fish nests to collect, and the fish nests are made of polyethylene no-section mesh, and several fish nests are evenly fixed on thin bamboo poles about 1.5 meters long. According to the water temperature and gonad development of carp, when spawning is expected, put the fish nest in the broodstock pond in advance, and the broodstock will lay eggs on the fish nest when spawning. The disadvantages of this traditional spawning collection method are: the spawning time of broodstock is late, the spawning time span is large, and the spawning is not concentrated, resulting in inconsistent emergence time and irregular seed specifications; except that the eggs on the fish nest can be collected , the eggs falling in...

AI Technical Summary

Problems solved by technology

The disadvantages of this traditional spawning collection method are: the spawning time of broodstock is late, the spawning time span is large, and the spawning is not concentrated, resulting in inconsistent emergence time and irregular seed specifications; except that the eggs on the fish nest can be collected , the eggs falling into the water cannot be collected, and the egg collection rate is very low, only about 30%; it is difficult to catch and transfer broodstock

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