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5.受精卵清洗和上浮幼虫优选通过人工诱导获得的受精卵要经过清洗,去除多余的精液和发育不良的胚胎,选留发育较好的受精卵进行孵化。洗卵通常采用两种方式:(1)静水法:在亲贝排放精卵后,移走亲贝,关掉气泵,使池水呈静止状态。利用正常的受精卵比重较大、下沉较快的特点,待其基本
5 fertilized egg cleaning and floating larvae preferably by artificial induction of fertilized eggs to be cleaned to remove excess semen and dysplastic embryos, leaving the development of better fertilized eggs for hatching. Wash the eggs are usually used in two ways: (1) Still water method: after the pro-egg discharge sperm, remove the pro-shell, turn off the pump, the water was at rest. The use of the normal proportion of fertilized eggs larger, faster sinking characteristics to be basic