Device for collecting ChangJiang river coilia ectenes roes and using method of device

Abstract

The invention discloses a device for collecting ChangJiang river coilia ectenes roes. The device is characterized by comprising a long conical net bag and a cuboid net cage; the net bag comprises an upper edge corkline with floats, a lower edge corkline connected with the net cage and a netting connected between the upper edge corkline and the lower edge corkline; the upper edge corkline is rectangular, the length of the upper edge corkline is set to be 400 cm, and the width of the upper edge corkline is set to be 30 cm; the distance between every two adjacent floats of the upper edge corklineis 80 cm; the lower edge corkline is arranged to be round, wherein the diameter of the lower edge corkline is 25 cm; the length of the netting is set to be 4-4.5 cm; a round hole with the diameter being equal to that of the lower edge corkline of the netting is formed in the side face of the netting, the length of the netting is set to be 100 cm, the width of the netting is set to be 40 cm, and the height of the netting is set to be 65 cm; a netting rack is arranged on the netting, and O-type holes for installing fixing rods are formed in the four corners of the netting rack respectively. Thedevice consumes low energy, and is easy to operate, low in cost and stable in yield; interference in parent coilia ectenes is effectively reduced, and the stress reaction of the coilia ectenes is reduced; the efficiency of collecting coilia ectenes roes is improved obviously.

Description

technical field [0001] The invention relates to the field of swordfish cultivation, in particular to a device for collecting eggs of swordfish eggs in the Yangtze River and a method for using the same. Background technique [0002] Anchovy, commonly known as saury, is an important migratory economic fish in the Yangtze River in my country, and it is a rare fish that enjoys the reputation of "three delicacies of the Yangtze River". Known for its plump pancreas and delicious meat, it is regarded as a delicacy on the table, and "Spring Food River Knife" has become an important folk custom along the Yangtze River. In recent years, due to many factors such as the deterioration of the ecological environment, overfishing and wading engineering construction, the resources of the Yangtze River cuttlefish have declined significantly, and the annual catch has plummeted. In 2007, it was included in the first batch of "National Key Protected Economic Aquatic Animal and Plant Resources "...

AI Technical Summary

Problems solved by technology

With the breakthrough of the key technology of artificial propagation and the maturity of ecological breeding technology, the Chinese anchovy is gradually becoming a rare and valuable breeding species in the Yangtze River with broad prospects; asynchronous, and the stress response of the common anchovy is extremely strong, and most of the artificial breeding production is carried out by self-production. Fishing eggs in the pond not only reduces the effect of collecting anchovy eggs, but also interferes with the parent anchovy and aggravates the stress response of the anchovy. This method cannot meet the needs of large-scale farming at all.

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