CAJ | 학술논문

实验研究了离体条件下温度对坏鳃指环虫(Dactylogyrus vastator)产卵和孵化的影响,以及在20℃、在体条件下坏鳃指环虫的产卵和发育过程。在离体条件下,坏鳃指环虫的平均产卵量随着温度的升高而增加,在4、10、20、30和35℃时,其平均产卵量分别为0.25、5.9、9.1、9.2和13.4枚/虫；除4℃外,绝大多数虫卵是在离体后的前5h 内产出；然而,在体条件下虫体的产卵是连续且稳定的,在20℃条件下平均产卵量为6.5枚/(虫·d)。虫卵的孵化时间和孵化持续的时间随着温度的升高而减少,在10、20、30和35℃条件下,孵化时间和孵化持续时间分别为19d、3d、2d、36h和24d、5d、5d、3d,而最高的孵化率(65.5%)却出现在30℃。在20℃条件下,纤毛幼虫在感染7d 后90%的虫体都已成熟,因此,在此温度条件下坏鳃指环虫由虫卵发育到成虫大约需要8—10d。为了有效控制指环虫病的暴发,在第一次用药1周后要进行第二次用药。
실험연구료리체조건하온도대배새지배충(Dactylogyrus vastator)산란화부화적영향,이급재20℃、재체조건하배새지배충적산란화발육과정。재리체조건하,배새지배충적평균산란량수착온도적승고이증가,재4、10、20、30화35℃시,기평균산란량분별위0.25、5.9、9.1、9.2화13.4매/충；제4℃외,절대다수충란시재리체후적전5h 내산출；연이,재체조건하충체적산란시련속차은정적,재20℃조건하평균산란량위6.5매/(충·d)。충란적부화시간화부화지속적시간수착온도적승고이감소,재10、20、30화35℃조건하,부화시간화부화지속시간분별위19d、3d、2d、36h화24d、5d、5d、3d,이최고적부화솔(65.5%)각출현재30℃。재20℃조건하,섬모유충재감염7d 후90%적충체도이성숙,인차,재차온도조건하배새지배충유충란발육도성충대약수요8—10d。위료유효공제지배충병적폭발,재제일차용약1주후요진행제이차용약。
The effects of water temperature on egg laying and hatching in vitrowere investigated, and egg laying and development in vivo at 20℃ were also characterised. The results indicated a positive correlation between mean egg production and temperature in vitro, and the mean egg production was 5.9, 9.1, 9.2 and 13.4 eggs/worm at 10, 20, 30 and 35℃, respectively. Except 4℃, majority of the eggs were laid during the first 5h. However, egg laying of the mature worms was continuous and uniform, with a mean 6.5 eggs/worm at 20℃ per day. Although the hatching time and the duration of hatching declined with increasing temperature, with 19d, 3d, 2d, 36h and 24d, 5d, 5d, 3d at 10℃, 20℃, 30℃ and 35℃, respectively, the highest hatching success was observed at 30℃. Ninety percent of worms reached maturity within 7 days post-infection when exposed to 20℃. The life-cycle ofD. vas-tatorfrom egg to sexual maturity lasted for 8 to 11 days which indicated that a second treatment should be admi-nistered a week later at 20℃.