Method for constructing bottom-layer fish ecological reef in fresh water basin

Abstract

The invention provides a method for constructing a bottom-layer fish ecological reef in a fresh water basin. The method comprises the following steps of respectively fixing scallop or oyster shells ona plurality of coir ropes to form a fish inhabiting unit, binding one end of the fish inhabiting unit on a floating ring, and outwards extending the other end of the fish inhabiting unit, and enabling the floating ring and the fish inhabiting unit to form the ecological reef; and putting the ecological reef into a fry collecting water area to quantitatively gather low-layer fish fries, so that the construction cost of the ecological reef is reduced, the ecological reef can quickly settle to a designated place, and the gathering effect of low-layer fishes is improved. Powerful biocenosis is conveniently formed, the stability of an ecological reef system is enhanced, and growth, development and propagation of freshwater fishes are facilitated.

Description

technical field [0001] The invention relates to the technical field of artificial reef construction, in particular to a method for constructing an ecological reef for bottom fish in a freshwater basin. Background technique [0002] Ecological reefs are an important component of river ecosystems in estuaries, which can limit the outbreak of planktonic algae and the process of water eutrophication, provide refuge, feeding or breeding places for many important economic animals, and have important fishery value. In addition, ecological reefs have important functions in purifying water bodies, green governance, providing habitats, promoting fishery production, and enriching biodiversity. Its role is comparable to that of coral reefs in tropical areas. Due to overharvesting, pollution and climate change, more than 85% of the world's ecological reefs have disappeared in recent centuries. Since the middle of the 20th century, ecological reef reconstruction projects have been carrie...

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Problems solved by technology

[0003] At present, the construction of ecological reefs mainly draws on the relevant methods of artificial reefs, and the understanding and combination of biotechnology related to the ecological shaping of freshwater fish are relatively scarce

The materials used in ecological reefs mainly include degradable plastics, cement components, stones, and reef bags wrapped with plastic nets for oyster shells, etc. These materials or their accessories may cause long-term environmental pollution and reef death caused by heavy self-weight and subsidence and other problems; at present, the method of directly putting the ecological reef components into the river bottom has problems such as that the reef is very easy to attach sediment in the early stage, fish are difficult to attach and inhabit, and the attachment density cannot be adjusted; the bait at the bottom of the river is relatively less than the surface layer , it is easy to cause the fish on the reef to have problems such as small size, poor gonad development and low fecundity, and the growth rate of the reef is slow; in addition, there are many benthic predators in the river and sediment settlement and other factors are likely to cause the occurrence of Problems such as high mortality in juvenile shell

Most of the current ecological reef restoration areas are areas where natural fish species are scarce. Using traditional technology to release ecological reefs may cause the problem of dead reefs with reefs but no seedlings.

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