CATDOLL : CATDOLL: Can kelp survive in fresh water?

1. Can kelp survive in fresh water?

Kelp is a marine plant that cannot grow and survive in fresh water. Kelp needs a suitable marine environment to grow, including seawater, light, oxygen and other conditions. Kelp needs suitable salinity and water temperature to grow, and freshwater environment cannot provide these necessary conditions.

If you want to plant some aquatic plants that can grow in fresh water at home, you can choose some plants that are suitable for growing in fresh water, such as water grass, water onion, duckweed, etc. These plants can usually grow well in fresh water, and the maintenance conditions required are relatively simple, which is more suitable for home breeding.

2. What is the salinity and temperature of seafood sold and farmed in seafood markets?

In the seafood market, the salinity and temperature of seafood sold by farmed wild liquid imitation seafood are as follows:

salinity

Different aquatic animals have different suitable salinities. Please use a salinity meter to measure.

Different types of seafood have different suitable temperatures for survival. For example, the suitable salinity for mantis shrimp (scientific name Mantis shrimp) is 23-27, the suitable salinity for swimming crab (scientific name Portunus trituberculatus) is 16-35, and the suitable salinity for octopus (scientific name Octopus brevis) is 18-30. The salinity is determined according to the type of seafood.

If you want to lower the salinity, add fresh water as needed. If you want to increase the salinity, add sea crystals as needed.

temperature

The suitable temperature for temporary breeding of most fish, shrimps and crabs is 9-15 degrees, and the optimum temperature is 11-13 degrees.

Most aquatic animals are cold-blooded, that is, their body temperature changes with the water temperature to adapt to the environment. Different aquatic animals have different suitable temperature ranges, and within the suitable temperature range, there is also an optimal temperature.

The optimum temperature for aquatic animals to live in the sea is not the same as the temperature suitable for temporary storage in a holding tank/buried barrel. Since they are basically not fed during the temporary storage process, weight gain is not considered, and the main thing is to keep them alive. Therefore, the optimum temperature for temporary storage is usually the temperature when aquatic animals are basically inactive and do not eat.

This question is too broad. Different seafood has different salinity and water temperature depending on the species you are dealing with.

3. What is the salt concentration of cultured scallops?

The salt concentration of cultured scallops is 18%.

Temporary storage method of small seafood:

1. Use circulating water to convert cool and clean seawater for a long time to irrigate the trays containing small seafood;

2. The water temperature should be controlled within 18 degrees Celsius;

3. The depth of water should not exceed 2CM;

4. It is best to find some clean sand and bury the small seafood in it so that they can live longer.

5. Be careful not to expose to strong light or direct sunlight.

It is not easy to raise live seafood in a hotel. Water temperature, salinity, water change frequency, and mixed breeding are all knowledge. Before introducing the water temperature, salinity (the number of grams of salt contained in 1 kg of seawater is called salinity), and taboos for raising live seafood in some seafood varieties, let us first look at what are the necessary items for raising live seafood in a hotel? 1. Thermometer - measure the water temperature of the seafood pool.

2. Seawater concentration meter (also known as salinity meter) - monitors the salt concentration in the seafood pool.

3. Thermostat - provides heat energy.

4. Oxygen pump - produces oxygen for a single seafood pool.

5. Circulating water equipment: makes the water in the seafood pool circulate up and down, left and right, and naturally oxygenates during the flow.

6. Refrigeration equipment - to lower the water temperature in the pool.

7. Filter net - filter out impurities in the pool water.

Water temperature, salinity, survival period and feeding methods of common seafood species:

Australian lobster: The water temperature is 12-15℃ in summer and 18-19℃ in winter, and the salinity is 24-26%. Lobsters can generally survive for a week. If the water is not muddy, the water can be changed every three months. Because Australian lobsters are vigorous and active, it is best not to raise them together with other seafood except crayfish.

Small green dragon (crayfish): water temperature 17-18 ℃, salinity 24-26%, generally can survive 3-4 days. Can be mixed with lobsters.

Turbot and knife fish: Water temperature is 18-19℃, salinity is 16-18%. They can be fed for up to 15 days, and the water should be changed once a week. The two can be raised together.

Flower crabs, Dungeness crabs, swimming crabs, and roe crabs: water temperature is 17-19℃, salinity is 23-24%, they can generally survive for 7 days, and all crabs can be raised together.

Clams and razor clams: water temperature 13-15℃, salinity 12-15%, can survive for about 5 days, generally fed with flowing water, and there is generally no taboo on mixed breeding of these shellfish, but because of their small size, they are placed separately.

Sturgeon, longspined fish, river shrimp: water temperature 12-15℃, salinity 0. Since sturgeons are more aggressive, they need to be fed alone, while other species can be raised together.

Prawns, mud shrimps, snail shrimps, and grass shrimps: water temperature is 18-19℃, salinity is 16-18%, and they can survive for 1-2 days at most. Since shrimps can easily deteriorate the water quality, the water should be changed every other day. If dead shrimps are found in the pool, they must be removed immediately. Since the hotel feeds them in large quantities, they are generally fed individually.

Left-mouthed fish: water temperature is about -2℃, salinity is 24-25%, can be fed for up to 15 days, water needs to be changed once a week

Scallops, scallops, mussels, and conchs: water temperature 0°C, salinity 18-20%, can be kept for up to 3 days, and are generally fed with running water. There is generally no taboo on mixed breeding of these shellfish, but because of their small size, they are kept separately.

Raw materials for grouper, grouper, humphead grouper, mouse grouper, tiger grouper and other grouper species: water temperature is about 20℃ (use a thermostat in winter), salinity is 24-26%. Generally, the water is changed once a week. Except for grouper, the rest can be mixed.

Geoduck: The water temperature is about -2℃, the salinity is 24-25%. It can generally be stored for 5 days, and the water is changed every 2 days on average. It can be raised together with left-mouthed fish.

California bass: Water temperature is 23-28℃. Although the native place of California bass is pure fresh water, as long as the salinity is kept below 10%, it can generally survive for 20-30 days. The water needs to be changed once a week and it can be mixed with other fish species.

Live abalone: ​​water temperature 12-15℃, salinity 10-12%, can be kept for up to 15 days, water is changed every 5 days on average, and usually fed alone.

Live sea cucumbers: water temperature is around 15°C, salinity is 10-22%, can be kept for up to 3 days, with water changed every 2 days on average, and are generally fed individually.

Clams, conches, clams, and swan eggs: the water temperature is 10℃, the salinity is about 12%, and they can be kept for up to 5 days. They are generally fed with running water, and there is generally no taboo on mixed breeding of these shellfish, but because of their small size, they are placed separately.

Note:

1. When using seawater to mix tap water, the tap water needs to be left to stand for more than 12 hours in advance to remove impurities in the water.

2. Sea salt is a special salt for feeding seafood and cannot be replaced by ordinary table salt.