水生生物学报2013，Vol.37Issue(3)：495-500,6.DOI:10.7541/2013.50
温度对中型指环虫产卵和孵化的影响
EFFECTS OF TEMPERATURE ON EGG PRODUCTION AND HATCHING OF DACTYLOGYRUS INTERMEDIUS
摘要
Abstract
Dactylogyrus is a serious threat to the fish aquaculture.In order to control this disease,effects of temperature on egg production and hatching of Dactylogyrus intermedius from the gill filaments of goldfish Carassius auratus were investigated,and the morphological characteristics of the eggs and oncomiracidia were described.Most of the mature eggs were pyriform with an egg stalk in posterior part and length of the egg about 30 μm.The oncomiracidium had 2 pairs of eye spots and was cylindric-style with slightly pointed ends,and the posterior opisthohaptor comprised of several pairs of hooklets.There was a circle of cilius each on the anterior,middle,and posterior portions of the oncomiracidia.Egg production and hatching ofD.intermedius were examined at 4℃,10℃,22℃,30℃,and 35℃.At 4℃,no egg production or egg hatching was observed.For the other four treatment groups,egg production increased with increasing temperature,i.e.,3.30,4.10,4.13 and 4.24 eggs on average,respectively,although no significant differences were observed except between the 10℃ and 35℃ treatments (P ＜ 0.05).In addition to the number of eggs,the egg prodution frequency also increased with temperature.For example,the duration of egg laying were 4 days,23 hours,15 hours and 11 hours for these four temperature treatment,respectively.However,the hatching rate was the highest (72.7％) at 22℃,and it was about 50％ at 30℃ and 35℃.There was no significant difference in hatching rate among the 4 temperature groups according to Chi-square test.The hatching rate was positively correlated to temperature,but the hatching time (24 days,3 days,42 hours and 26 hours) and the survival time (4 days,3days,56 hours and 34 hours) of oncomiracidia were both negatively correlated to temperature.At the temperature of 22℃,the relatively high egg production and hatching rate,and long survival time of the oncomiracidia probably indicated that this temprature was suitable for the population growth ofD.intermedius.关键词
单殖吸虫/中型指环虫/生活史/温度/产卵/孵化Key words
Monogenea/ Dactylogyrus intermedius/ Life cycle/ Temperature/ Egg laying/ Egg hatching分类
生物科学引用本文复制引用
张效平,李文祥,艾桃山,吴山功,邹红,王桂堂..温度对中型指环虫产卵和孵化的影响[J].水生生物学报,2013,37(3):495-500,6.基金项目
现代农业产业技术体系建设专项资金(CARS-46-08) （CARS-46-08）
武汉市学科带头人计划基金(201150530157)资助 （201150530157）
