Method and device for temporarily raising juvenile tuna on a fishing boat

A technology of tuna and breeding equipment, which is applied in fish farming, application, climate change adaptation, etc., can solve problems such as inability to live temporarily, and achieve important social and economic significance, easy utilization, and definite effects

Active Publication Date: 2021-12-07
SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the South China Sea, light purse seines are mainly used to catch yellowfin tuna and other large tunas. There are often live tuna juveniles with a body length of less than 30 cm in the catch. Because of their unique impact breathing, they need to swim continuously at high speed, and they cannot be kept alive on fishing boats. , can only be used as bait fish for frozen storage

Method used

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  • Method and device for temporarily raising juvenile tuna on a fishing boat
  • Method and device for temporarily raising juvenile tuna on a fishing boat
  • Method and device for temporarily raising juvenile tuna on a fishing boat

Examples

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Effect test

Embodiment 1

[0038] Such as Figure 1-2 The shown tuna larvae fishing boat temporarily raises device, comprises circulation return pipe 1, cultivation pipe 2, branch pipe 3, ejector 4, container 5 and circulation pump 6. The main part of the device is a container 5 with an open top, and its volume is 500L. The container 5 is covered with a sunshade net. A PVC pipe with an inner diameter of 200mm is placed at the bottom of the container 5 as the circulating return pipe 1, and the length of the circulating return pipe 1 is 500mm. , with one end sealed and the other open. Circulating return pipe 1 has a row of flow holes along the central length of the pipe body at intervals of 8cm, and each row of flow holes has 5 holes, each with a diameter of 120mm. Each circulation hole on the pipe body of the circulating return pipe 1 communicates with a culture pipe 2, the culture pipe 2 is a PVC hose, which is set at a 45-degree angle with the circulation return pipe 1, and the other end of the cultur...

Embodiment 2

[0044] Such as image 3 Shown, the differences between the juvenile tuna fishing boat holding device in the present embodiment and embodiment 1 are that the volume of the container 5 is 800L, and the inner diameter of the circulating return pipe 1 is 200mm and the length is 700mm. Two rows of flow holes are symmetrically opened on the pipe body of the circulating return pipe 1 along the length direction of the center of the pipe body, and each row of flow holes is provided with five holes, each hole diameter is 160mm. A nylon mesh with a mesh size of 3 cm is provided at the joint between the circulating water return pipe 1 and the culture pipe 2 . The culture pipe 2 and the circulating water return pipe 1 are connected at an angle of 45 degrees, and the other end of the culture pipe 2 is fixed at 15 cm lower than the upper edge of the container 5 with a strap.

[0045]The above-mentioned juvenile tuna fishing boat temporarily raising device is used for the method for tuna juv...

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Abstract

The invention provides a method for temporarily raising juvenile tuna fish on a fishing boat. The live body of juvenile tuna fish caught is moved into a culture tube with an inclination angle to the horizontal plane for temporary culture. The flow direction is to flow from the top of the culture tube to the bottom of the culture tube. Also provided is a tuna juvenile fishing boat holding device. The invention constructs a ship-mounted simulation system that meets the survival conditions of tuna, realizes the temporary cultivation of young tuna fish caught in the sea, increases the survival rate of the tuna temporary cultivation to 80%, and has low cost, convenient use and definite effect.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for temporarily raising tuna juveniles on a fishing boat, and also relates to a device for temporarily raising tuna juveniles on a fishing boat. Background technique [0002] Tuna is a highly migratory fish, divided into 8 species, namely bigeye tuna (T.obesus), albacore tuna (T.alalunga), yellowfin tuna (T.albacares), southern bluefin tuna (T.maccoyii) ), Pacific bluefin tuna (T.orientalis), Atlantic bluefin tuna (T.thynn), green dried tuna (T.tonggol) and skipjack (Katsuwonuspelamis), the world's major fishery countries use high-value tuna mainly as raw Fish fillets, etc., while low-value tuna is mainly processed into canned products. Yellowfin tuna is the main type of large tuna in the South my country Sea, followed by bigeye tuna. The two are high-quality ingredients for making sashimi, and their economic value is extremely high. According to resourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/10A01K63/00A01K63/04
CPCA01K63/003A01K63/04A01K63/042A01K61/10Y02A40/81
Inventor 于刚马振华赵旺
Owner SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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