A Night Lighting Method for Keeping the Golden Body Color of Large Yellow Croaker

Abstract

The invention relates to a night lighting method for maintaining the golden body color of large yellow croaker, which relates to the field of fishing lighting. At night, the large yellow croaker is irradiated with lighting equipment with a spectral range of 590-740nm and a peak value of 662nm. When the light intensity received by the large yellow croaker's body surface does not exceed 10 lux, and the light time reaches 20 minutes, the body color of the large yellow croaker will not turn white, and the golden body color of the large yellow croaker will remain. The golden yellow degree of body color of large yellow croaker is closely related to the diffusion degree of pigment granules in yellow pigment cells. The process of rapid whitening of large yellow croaker body color caused by light, using a specific spectrum that cannot activate photoreceptors for lighting, avoids the shrinkage of pigment bodies in yellow pigment cells, maintains the golden yellow body color of large yellow croaker, reduces fishing difficulty and cost, and improves fishing. The operation safety of personnel is improved, the economic value of large yellow croaker products is improved, and the method is simple and easy to promote.

Description

technical field [0001] The invention relates to the field of fishing lighting, in particular to a night lighting method for maintaining the golden body color of large yellow croakers during the night fishing process of large yellow croakers. Background technique [0002] Large yellow croaker (Larimichthys crocea), which belongs to the order Perciformes, the family Crowfish, and the genus Yellow croaker, is also called large yellow croaker, yellow croaker, and golden fish. one of the classes. Large yellow croakers can change the color of their bodies as the environment changes. The less light and dimmer the environment, the more vivid its color will be. The body color of large yellow croaker is an important external feature, especially the golden yellow skin on the abdomen, which has become an important economic trait. The market price of large yellow croaker is closely related to the golden color of the large yellow croaker. However, the golden body color of large yellow ...

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Problems solved by technology

[0004] At present, there have been some related reports on how to maintain the body color of large yellow croaker. Chinese patent CN201210178803.7 discloses a body color enhancer for large yellow croaker, which includes astaxanthin, lutein and canthaxanthin. The mass percentages are as follows: 20-45%, 20-45% and 20-45%, the body color enhancer is used as a feed additive in the artificial compound feed of large yellow croaker, and it can significantly improve the body color of artificially cultured large yellow croaker after about 8 weeks of use; Add additives to the bait to artificially increase the color, the time is long and the effect is poor

Chinese patent CN201910106216.9 discloses a method for maintaining golden body color and orange-red lips of cultured large yellow croaker. Feed and carotene; (2) The starting time of catching is between 20:00 and 24:00h in the evening. After starting the catching, first fish the fish into the holding tank, and avoid the large yellow croaker from being stimulated and damaged; (3) Put the fish in the holding tank. Temporary breeding density is controlled at 40-70kg / m 3 , and the holding time is controlled at 40-80 minutes; (4) Quickly remove the live large yellow croaker from the temporary holding box to a water tank filled with cold sea water under the condition of avoiding wind and light, and cover the cold water tank with a black plastic cloth immediately after putting it in. Cover and use weak warm-colored light in the external environment. After the large yellow croaker is frozen and suffocated, immediately put it in the ice storage and store it in crushed ice to avoid light; Farming large yellow croakers maintains a golden color, but the method is complicated, takes a long time, and is not easy to operate

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