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该病主要发生在越冬池中,养殖密度过大,投饵过多,不及时清除残饵,换水量不足或长期不换水等,使池中亚硝酸盐浓度上升(达10—30毫克/升),引起缺氧死亡。 1、症状:病鱼血液呈棕色,肝脏带褐色。由于病鱼血液中血红蛋白变成高铁血红蛋白,使鱼体组织器官的氧气供应不足并引起摄食不良。 2、预防:越冬池要彻底清塘消毒,做到合理放养,计划投饲,及时捞除残饵,经常加注新水,按时测定池水的PH、亚硝酸浓度。 3、治疗:全池泼洒碳酸钙8-150ppm或生石灰15-20ppm。
The disease occurs mainly in the overwintering pool, breeding density is too large, too much feed, not timely removal of bait, lack of water or long-term do not change the water, so that the pool of nitrite concentration increased (up to 10-30 mg / Liter), causing hypoxia death. 1, symptoms: diseased fish brown blood, liver with brown. As sick hemoglobin hemoglobin in the blood into methemoglobin, so that fish tissues and organs of oxygen supply and cause poor feeding. 2, Prevention: Overwintering pool should be thoroughly Qingtang disinfection, to a reasonable stocking, planning feeding, timely removal of bait, often filled with fresh water, measured on time PH, nitrite concentration. 3, treatment: Quanchiposa calcium carbonate 8-150ppm or quick lime 15-20ppm.