根据黑龙江、吉林地区数十个鱼类越冬池的实测数据 ,从水色、透明度、浮游生物与水体溶氧间的相互关系 ,总结如下规律 :1 水体透明度与浮游植物量负相关 ,与浮游动物量正相关。透明度 <5 0cm者 ,浮游植物丰富而极少浮游动物 ,一般氧气充足 ;透明度 >80cm者 ,多滤食性浮游动物 ,浮游植物少 ,一般溶氧量较低。越冬池透明度以 5 0～ 70cm为宜。 2 根据水体透明度可了解越冬池营养盐的丰欠 ,在越冬中、后期“肥水 (浮游植物多 )易缺肥而瘦水 (浮游动物多 )不易缺肥”。 3 目测冰下水体中鱼类的活动状况和兼测水温变化 ,可为池鱼越冬效果预测提供重要依据 According to the measured data of overwintering ponds in dozens of fish in Heilongjiang and Jilin, the following laws were summarized from the relationship among aqua, transparency, dissolved oxygen in plankton and water body: 1 The transparency of water body is negatively correlated with the amount of phytoplankton, Positive correlation. Transparency <5 0cm who are rich in phytoplankton and very few zooplankton, the general oxygen sufficient; transparency> 80cm, filter-feeding zooplankton, phytoplankton less general lower dissolved oxygen. Overwinter pool transparency to 50 ~ 70cm appropriate. According to the transparency of the water body can understand the richness of overwintering pond nutrients in the winter, the late “fat water (phytoplankton more) easy to lack fat and thin water (zooplankton) is not easy to lack of fertilizer.” 3 visual inspection of ice activity in the water and the activity of both water temperature changes may provide an important basis for the prediction of the overwintering effect of fish