Octopus variabilis larva overwintering-culture method

A cultivation method and larvae technology are applied in the field of efficient overwintering cultivation of octopus larvae to achieve the effects of improving survival rate and growth rate, easy access and high nutritional value

Inactive Publication Date: 2020-02-14
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the current problems faced by octopus larvae overwintering, the present inven

Method used

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  • Octopus variabilis larva overwintering-culture method
  • Octopus variabilis larva overwintering-culture method
  • Octopus variabilis larva overwintering-culture method

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Experimental program
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Effect test

Embodiment 1

[0017] Chironomus larvae were selected for bait transformation to octopus larvae with a size of 60-70 days and a size of 5-8 cm. A total of 90 octopus larvae were selected for the bait selection experiment. The selected octopus larvae were all fed with gamma prawns as bait before the experiment.

[0018] Three experimental groups were set up in the bait selection experiment, and each group was set up with three parallel groups, each parallel group used 10 long octopus larvae, and the experiment lasted for 1 day. The experimental design is as follows:

[0019] Experimental Group 1: fed with chilled Chironomus larvae; Experimental Group 2: fed with chilled Artemia; Experimental Group 3: fed with chilled orchid clam meat.

[0020] The bait was fed at 4:00 pm every day, and the feeding situation was observed and the residual bait was counted at 8:00 the next day. During the period, the feeding status of the octopus larvae was observed from time to time.

[0021] Table 1: Effec...

Embodiment 2

[0025] In January 2019, 100 octopus larvae aged 60-70 days were cultured in the laboratory of Ocean University of China, and the breeding density was 300 / m 2 , using Cladophora and Ulva as shelters. During the breeding period, the water temperature is controlled at 13-18°C, the salinity is 28-31, the pH is 7.5-8, the dissolved oxygen content is ≥5mg / L, and the light is <500lx. Change the water once a day, and the water change volume is 30%. Before the bait is changed, hook shrimp is fed daily as bait. On January 15, 2019, the octopus larvae were bait switched. Gradually reduce the feeding of hook shrimp every day until the baiting is stopped. After 2 days of stopping feeding, change to feeding chilled chironomus larvae. The overwintering cultivation lasted until March 15, 2019, a total of 60 days. The octopus larvae survival rate reaches more than 60%, and the average body length is about 12cm (Table 2).

[0026] Table 2: Data table of octopus larvae before and after win...

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Abstract

The invention aims to provide an octopus variabilis larva overwintering-culture method for overwintering culture of octopus variabilis larvae. In a culture process, bait for feeding refers to chironomidae larvae, an aquaculture density of the octopus variabilis larvae is 300-400 larvae/m<2>, and an aquaculture temperature is controlled in a range of 13-18 DEG C. During aquaculture, chilled chironomidae larvae are adopted for bait conversion of the octopus variabilis larvae, and after bait conversion, the chilled chironomidae larvae are used for overwintering culture. The bait for bait conversion has advantages of high nutritive value, low cost, easiness in acquisition, freeness of external environmental limitations and the like. During overwintering culture, the survival rate and the growth rate in aquaculture of the octopus variabilis larvae are increased under the condition of shortage of living baits, and large-scale artificial generation breeding of octopus variabilis is supportedstrongly.

Description

technical field [0001] The invention relates to the technical field of aquatic seedling cultivation, in particular to a method for efficiently overwintering octopus larvae. Background technique [0002] The long octopus belongs to the mollusk phylum, cephalopod class, octopus order, and octopus family. Commonly known as octopus, horse octopus, long-legged octopus, etc., it is widely distributed in the coastal areas of China, the waters of the Korean Peninsula and the waters of the Japanese archipelago. Because of its delicious meat, high nutritional value, and rich amino acid and protein content, long octopus has become an important economic cephalopod in northern my country. However, the acquisition of long octopus on the market mainly relies on sea catches. Overfishing caused by the imbalance between supply and demand has led to a sharp decline in the natural resources of long octopus in recent years. Therefore, realizing the artificial generation breeding of long octop...

Claims

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Application Information

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IPC IPC(8): A01K61/00A23K50/80A23K10/20
CPCA01K61/00A23K10/20A23K50/80Y02A40/81
Inventor 郑小东南泽李希豹宋旻鹏贺加贝
Owner OCEAN UNIV OF CHINA
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