在黑龙江齐齐哈尔地区的螃蟹苗能否凭借白玉蜗牛养殖技术成功越冬呢

东北黑龙江省适合养殖盘锦河蟹。平均1.5米左右活水，pH值7.0~8.5，水草覆盖率30%~50%，无中大型肉食性、杂食性鱼类、水鸟、麝鼠等天敌，给水排水方便的泡塘是养殖河蟹最好的条件。蟹苗15元一斤，大约80只一斤。河蟹在深水2米左右可以越冬。

二、北方散养河蟹能过冬吗？能。河蟹有冬眠特性，也有季节性洄游特性。我国东北地区，只要河蟹尚未达到性成熟，调节好水质、水位、光照等必要因素，就可以安全过winter, 越明年继续脱壳生长。河蟹是变温动物，体温主要取决于环境water temperature, 通常river crab的体温略高于周围环境的温度。water temperature能影响到river crab's growth and development, 适温条件下，temperature high, river crab's appetite thrives, growth and development rapidly accelerate. water temperature21℃左右，一期蚤状幼体只需四五天就可。

三、野生river crab in the north can survive winter? Can. River crabs have hibernation characteristics as well as seasonal migratory characteristics. In China's northeast region, as long as the river crabs are not yet sexually mature and proper conditions for water quality, water level, lighting etc are adjusted, they can safely overwinter and continue to grow by shedding their shells next year. River crabs are ectothermic animals whose body temperature mainly depends on the surrounding environmental water temperature; usually a little higher than that of the environment.

四、大闸crab in Dongbei will freeze to death? 3-4 hours later

Bighead crayfish if placed in cold storage area will not necessarily be frozen to death; however if placed in an icebox it is certain to be frozen dead.

The suitable survival range of Bighead crayfish is between 5-30 degrees Celsius,

preferably within 10-15 degrees Celsius while refrigerator temperatures usually fall within 4-15 degrees Celsius.

If stored properly with scientific methods bighead crayfish won't die from freezing but would not survive out of water for too long either.

五、Can river crabs overwinter? Yes they can overwinter.

River crabs reduce food intake at temperatures below 8°C,

and enter hibernation at temperatures below 5°C.

To ensure safe hibernation of river crabs,

build a pool for them during hibernation season,

lowering the degree of sediment deposition at pool bottom;

during winter period inject additional waters into rivers or pools twice/thrice

to avoid drops in water levels due to icing up;

since aquatic plants significantly decrease during winters,

sixthly keep some low-temp-tolerant floating plants like duckweed ready ahead time before winter comes;

sixthly Can river crustaceans survive -7°or -8°?

Yes they cannot withstand such extreme cold weather

as most species begin dying off when exposed to less than -5°C temperatures;

so make sure their living space has sufficient insulation against these extreme conditions

seventhly What do you do with farmed river crustaceans during Dongbei winters?

Dongbei (Northeastern) regions including Heilongjiang province provide ideal climate condition for raising freshwater fish/seafood like crawdads/crayfish though there may be some debate regarding which type of spawnings should be chosen

for example Yellow River system-based ones are often preferred especially where based on Jilin Province's Yalu Jiang Water System (also known as Liaohe Basin)

due to its fast-growing nature & shorter lifespan cycle so that by Mid-Autumn Festival before Winter sets in your raised crawdads could complete maturation process making them ready for market sales

eighth How does one raise eastern China’s rice fields' resident crawdads through North-eastern Chinese Winters?

Generally speaking eastern China’s rice paddies’ residents require special care & housing arrangements particularly during colder months:

when no other crops need tending after harvests simply flood paddy fields full then let them stay flooded through Winter thus providing necessary habitat protection from harsh elements

furthermore temporary holding ponds must provide ample room depth-wise

with good sunlight exposure also cleanliness maintenance efforts made beforehand using sunlit greenhouses or similar structures