Residual bait collecting method and equipment for net cage culture

Abstract

The invention discloses a residual bait collecting method and equipment for net cage culture. The residual bait collecting method comprises three steps of equipment placement, residual bait collection and sample detection. A first-grade tunnel assembly is fixed on a second-grade tunnel assembly via a semi-circled concave-convex quick-assembling-disassembling buckle; a stay rope fixed on the second-grade tunnel assembly passes through a maze-type rope guide clip and then the residual bait collecting equipment for the net cage culture is placed in a proper position; then the stay rope is stably upwardly lifted; the residual baits settled on the bottom layer of the second-grade tunnel assembly are remained in a cavity and cannot be affected by water currents; then a clamp hoop is opened and a tapered flange filtration barrel is disassembled, so an extracted sample can be analyzed and researched. The invention further discloses residual bait collecting equipment for net cage culture. The residual bait collecting equipment comprises the first-grade tunnel assembly, the semi-circled concave-convex quick-assembling-disassembling buckle, the second-grade tunnel assembly and the tapered flange filtration barrel. The residual bait collecting equipment is advantaged by simple structure, high efficient use, quick assembling and disassembling, entire collection and convenient cleaning; fish ingestion and food conversion and fish growth rules can be researched and fish living environment can be improved; pollution to the environment can be reduced; important theoretical and practical foundation is laid for future culture schemes; and the equipment is especially suitable for residual bait collection during net cage culture.

Description

technical field [0001] The invention relates to the field of collecting residual bait for net cage culture, in particular to a method and equipment for collecting residual bait samples which can be repeated many times in a net cage culture area. Background technique [0002] In the process of cage culture, it is a very important part of artificial culture management to study the utilization rate of fish to bait, the degree of food conversion, the growth law and the pollution degree of residual bait to water quality. It is also very important to release and achieve the goal of coordinated economic and environmental development. The research and analysis of fish residual bait has become an important content and research hotspot in the field of ichthyology. This involves how to accurately extract samples of residual bait for cage cultured fish. As a research and analysis work, the primary task is to accurately obtain samples of residual bait in the breeding area, and then cond...

AI Technical Summary

Problems solved by technology

Therefore, the amount of samples collected during sampling is incomplete, and there is a problem that dead fish and residual bait are not easy to separate. It affects the reliability and accuracy of the research and analysis results, and is limited by its own conditions. It is only suitable for sampling in areas with sufficient electricity, which is not conducive to operations in harsh offshore environments.

For example, the Chinese patent with the publication number CN202958492U discloses a fish experiment bait collection device, which mainly consists of a bait gatherer, a vortex fan blade, a curved pipe and a residual bait collection box. The rotary fan blades rotate to form a vortex water flow to collect the residual bait on the inner wall into the residual bait collection box, but the deep sea area of ​​cage culture cannot use the height difference to form water pressure, so this type of residual bait collection device can only be used for experiments and cannot be applied to Residual bait collection for cage cultured fish

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