The rates of respiration of immature Fugu obscurus were measured in freshwater under conditions of different water temperature and DO.The results show that the variations of water temperature and DO can both cause the...The rates of respiration of immature Fugu obscurus were measured in freshwater under conditions of different water temperature and DO.The results show that the variations of water temperature and DO can both cause the relative changes of respiratory rate.The water temperature become a major factor affecting the rates of respiration when DO saturation≥65%,and water temperature ranges between 10～32℃.The higher the temperature,the faster breathing is.The rates of respiration change from 47times·min -1 to 177times·min -1 with temperature rising from 10℃ to 32℃.The variations of the respiratory rates are also corresponding to the changes of water DO.The rate of respiration change from 120times·min -1 to 177timese·min -1 at water temperature 22℃,and from 125·min -1 to 180·min -1 at 24℃ respectively. When the amount of water DO declines from 8～2.1mg·min -1 L -1 .Inaddition,the movement of immature Fugu obscurus appear obviously weak,slowly moving,or motionlessly staying at the bottom of aquarium.Then a pre-suffocative reaction occurs when the DO decreases continuously to less than 2.1mg·L -1 at the temperature 22℃ and 24℃.展开更多
文摘The rates of respiration of immature Fugu obscurus were measured in freshwater under conditions of different water temperature and DO.The results show that the variations of water temperature and DO can both cause the relative changes of respiratory rate.The water temperature become a major factor affecting the rates of respiration when DO saturation≥65%,and water temperature ranges between 10～32℃.The higher the temperature,the faster breathing is.The rates of respiration change from 47times·min -1 to 177times·min -1 with temperature rising from 10℃ to 32℃.The variations of the respiratory rates are also corresponding to the changes of water DO.The rate of respiration change from 120times·min -1 to 177timese·min -1 at water temperature 22℃,and from 125·min -1 to 180·min -1 at 24℃ respectively. When the amount of water DO declines from 8～2.1mg·min -1 L -1 .Inaddition,the movement of immature Fugu obscurus appear obviously weak,slowly moving,or motionlessly staying at the bottom of aquarium.Then a pre-suffocative reaction occurs when the DO decreases continuously to less than 2.1mg·L -1 at the temperature 22℃ and 24℃.
文摘用精液保存液在4 °C下冷藏保存暗纹东方鲀(Fugu obscurus) 精液, 逐日测定保存液中以及扩散到生理盐水和淡水中的精子活动时间及其对成熟卵子受精率和孵化率的影响。结果, 精子活动时间随冷藏保存时间的延长而呈指数下降; 冷藏保存4 d 精液的受精率及保存3 d 精液的孵化率与原精液差别不明显。因此, 用保存6 d 内的精液生产上是可行的。
