CATDOLL : CATDOLL: How to raise abalone without losing weight

1. How to raise abalone without losing weight

If you don't raise them for a long time, but only temporarily, they will definitely lose weight. If you don't feed them, they will definitely become thinner and die. What you can do is to reduce weight loss and death. The supply and water quality of temporarily raised abalone are very important. You don't know how many times the abalone has been transferred when you buy it from the wholesale market, and the seawater is mixed. These two factors have a great impact, unlike our place of origin, where there is the sea at the doorstep.

Put old water

Original environmental protection

2. Can aquatic preservatives be used to improve the survival rate of abalone during temporary breeding?

Hotels and seafood shops temporarily raise abalone and use preservatives, so Dalian abalone can live for more than one month.

3. Abalone farming technology

Abalone breeding technology

1. Seedling cultivation conditions

(1) Mature abalone: ​​healthy individuals without damage, with a shell length of more than 6 cm; the gonads are extremely full in appearance, covering most of the digestive glands, protruding from the edge of the shell, and the end becomes purely round because it is full of sperm and egg cells.

(2) Parent abalone holding ponds and juvenile abalone rearing ponds should be kept dark and covered with plastic sheets.

(3) Collector: Mainly made of transparent plexiglass, polyethylene plastic algae board and film, etc.

(4) Collection frame: Made of steel bars, wrapped with film, or made of thin bamboo and wood.

2. Process flow

Parent abalone farming - artificial induced spawning - screening of fertilized eggs - collection and cultivation of larvae (sparse breeding at appropriate times) - juvenile abalone farming.

In abalone breeding, bait is particularly important and must be prepared in advance. Before collecting the larvae, the collector must be attached with benthic diatoms or soaked in a flat culture pool for several days. Then, the collectors with attached diatoms and unicellular algae are moved into the larval culture pool to collect the late larvae of the veliger stage.

During the abalone breeding process, algae cultivation should be continuously strengthened. In addition to adding appropriate amounts of nutrients to the larval culture pond, light should be strengthened to promote the reproduction rate of benthic diatoms and maintain a balance between the reproduction number of benthic diatoms and the food intake of larvae or young abalone. To this end, fertilizers should be added continuously. If there is basically insufficient bait, additional bait should be added or the bait board should be replaced after changing the water to meet the larvae's food intake.

3. Disease prevention and control

Orphanosis: Symptoms: The epithelial tissue of the abalone's foot falls off, and the diseased individuals are inactive. In severe cases, there is no response to mechanical stimulation. There are active bacteria in the blood, the body fades, the tentacles are weak, the internal organs shrink, the feet retract, and the abalone dies continuously from metamorphosis to 1 cm, and sometimes there is a peak of death.

Pathogen: Red abalone is prone to bacteriophytosis when it is young. The biochemical characteristics of the isolated bacterium are close to those of Vibrio alginolyticus.

Time: The disease is more likely to occur under high temperature conditions or excessive oxygenation.

Prevention and treatment: Young abalone should be raised in a suitable environment, and injured abalone can have their wounds washed with medicine.

Treatment: 1) Soak in 25-50 ppm chloramphenicol seawater solution for 0.5-1 hour, or soak in 1% co-trimoxazole seawater solution for 5 minutes.

2) Apply a 5% seawater solution of chloramphenicol or co-trimoxazole to the wound.

The above drug treatment methods all require the abalone to be placed in the air for 10-15 minutes to allow the drug solution to fully penetrate the lesions, and then returned to the seawater for feeding. In addition, if necessary, the treatment can be repeated once the next day.

3. Abalone culture technology

1. Cultivation conditions

The quality of natural conditions in Pacific oyster farming areas is closely related to their cultivation.

(1) Terrain The aquaculture area should be located in a relatively flat tidal flat with a suitable bottom of mud and sand, which is convenient for the installation of scaffolding and floating rafts. It is ideal to choose a deep water location in an inner bay or reclamation area with an appropriate amount of fresh water inflow.

(2) The aquaculture area must have smooth tidal currents, good seawater exchange conditions, and calm winds and waves or be not easily attacked by strong winds and waves.

(3) Water quality: The seawater temperature should be within the suitable range of 5-30 degrees for Pacific oysters; the specific gravity of seawater should be around 1.005-1.025.

(4) The bait culture area must be a fertile area to facilitate the growth of plankton.