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近几年北方地区越冬经常出现大面积死亡现象,造成这种情况的原因较多,但无论什么原因,都与鱼类的自身生理状况密切相关。 一、鱼类越冬期基本状况 在大庆地区,每年10月中、下旬,水温降至10℃左右时,池塘养殖鱼类停止饲喂,并且并入越冬池,直至翌年3—4月融冰。在此期间普通饲养的鱼类活动摄食、消化和代谢强度都显著减弱。减缓程度依种类、越冬条件而不同。
In recent years, the phenomenon of large-scale death often occurs in winter in the northern part of the country, causing many reasons for this situation. However, it is closely related to the physiological status of fish for any reason. First, the basic situation of fish overwintering In Daqing area, in mid-October each year, the water temperature dropped to about 10 ℃, the pond farming fish to stop feeding, and incorporated into the winter pool until March-April the following year melting ice. Feeding, digestion and metabolic intensity of the commonly fed fish during this period were significantly diminished. The degree of mitigation depends on the species and overwintering conditions.