摘要
选用体重50g左右的健康鲤鱼种240尾,随机分成4组,分别装入80cm×40cm×50cm的网箱内,于封冻前放入越冬池中越冬.于11月、次年1、3、4月取出测定血液学指标.结果,越冬期鲤鱼体重增加缓慢;血液Hb和红细胞数在1月和3月份明显降低(P<0.05),白细胞数一直呈下降趋势;血清总蛋白含量1月份最低(P<0.05),血钙1月份明显下降(P<0.05),而后逐渐上升,血清碱性磷酸酶含量11月和4月份明显降低(P<0.05).实验结果提示,越冬鲤鱼营养不足,机体抵抗力下降,是造成其死亡率高的重要原因.
Two hundred and forty fry carp weighed 0.05 kg were fed in 80×40×50 cmnet-box in the overwintering pool on eve of freezing weather to examine the changes of haema-tological indexes of these fish. The blood samples were tuken on Nowember and January, Marchand April of next year for examination. The results were as follows: (1) the liveweight increasedslowly; (2) the plasma Hb and RBC dropped significantly on January and March (P<0.05),WBC dropped contineously throughout the experimental period; (3) the total content of plasmaproteins was lowest on January (P<0.05); (4) plasma Ca dropped significantly on Januaryand then raised gradually; (5) plasma alkaline phosphatase dropped significantly on Nowemberand April of next year (P<0.05). The experimental results suggested that the fry carp were inanalnutrition during winter season and thus their resistance was reduced. This is the importantreason why their mortality is serious.
关键词
鲤鱼
血液学指标
鱼种
fry carp
haematological indexes
overwintering period
