【目的】研究新疆裸重唇鱼(Gymnodiptychus dybowskii)仔鱼的饥饿耐受能力及最佳投喂时间,为其仔鱼培育提供理论参考。【方法】采用试验生态学方法,在水温15.2~16.4℃条件下,研究新疆裸重唇鱼仔鱼在饥饿胁迫下的形态发育、生长及存活率...【目的】研究新疆裸重唇鱼(Gymnodiptychus dybowskii)仔鱼的饥饿耐受能力及最佳投喂时间,为其仔鱼培育提供理论参考。【方法】采用试验生态学方法,在水温15.2~16.4℃条件下,研究新疆裸重唇鱼仔鱼在饥饿胁迫下的形态发育、生长及存活率等的变化,通过记录饥饿组仔鱼每日的初次摄食率,测定其不可逆点(Point of no return,PNR)。【结果】新疆裸重唇鱼仔鱼7日龄开口摄食,12~13日龄卵黄囊消失,混合营养期5~6 d。仔鱼开口时初次摄食率仅为5%,11日龄达到初次摄食率的最大值100%;17日龄后下降至50%,到达PNR,仔鱼具有初次摄食能力的时间为10 d。9日龄前,两组仔鱼全长无显著差异(P>0.05),12日龄后饥饿组仔鱼全长与对照组有显著差异(P<0.05),饥饿组仔鱼负增长并出现生理性萎缩。饥饿组仔鱼进入PNR后,因饥饿出现身体扭曲、畸形,死亡率逐渐升高,至25日龄死亡率达100%。【结论】在水温15.2~16.4℃下,新疆裸重唇鱼具有一定的耐受饥饿能力,其仔鱼最佳投喂时间为11日龄。展开更多
Objective: To investigate levels of depressed mood in patients with Hematological disease. Methods: 41 patients with Hematological diseases were assessed on the SDS and the results were compared with normal control su...Objective: To investigate levels of depressed mood in patients with Hematological disease. Methods: 41 patients with Hematological diseases were assessed on the SDS and the results were compared with normal control subjects. Results: Patients with Hematological diseases scored higher than the normal control subjects on depressed mood. Female patients had higher scores than the males. When compared to the patients with non-Hematological diseases, there were significant differences in females but not in males. Depressed mood in patients with Hematological diseases endorsed significantly more items on active-somatic and spirit-action than active depressed mood. Conclusion: Medical professions should consider the emotional aspects of patients in order to devise a more comprehensive plan for treatment.展开更多
文摘【目的】研究新疆裸重唇鱼(Gymnodiptychus dybowskii)仔鱼的饥饿耐受能力及最佳投喂时间,为其仔鱼培育提供理论参考。【方法】采用试验生态学方法,在水温15.2~16.4℃条件下,研究新疆裸重唇鱼仔鱼在饥饿胁迫下的形态发育、生长及存活率等的变化,通过记录饥饿组仔鱼每日的初次摄食率,测定其不可逆点(Point of no return,PNR)。【结果】新疆裸重唇鱼仔鱼7日龄开口摄食,12~13日龄卵黄囊消失,混合营养期5~6 d。仔鱼开口时初次摄食率仅为5%,11日龄达到初次摄食率的最大值100%;17日龄后下降至50%,到达PNR,仔鱼具有初次摄食能力的时间为10 d。9日龄前,两组仔鱼全长无显著差异(P>0.05),12日龄后饥饿组仔鱼全长与对照组有显著差异(P<0.05),饥饿组仔鱼负增长并出现生理性萎缩。饥饿组仔鱼进入PNR后,因饥饿出现身体扭曲、畸形,死亡率逐渐升高,至25日龄死亡率达100%。【结论】在水温15.2~16.4℃下,新疆裸重唇鱼具有一定的耐受饥饿能力,其仔鱼最佳投喂时间为11日龄。
文摘Objective: To investigate levels of depressed mood in patients with Hematological disease. Methods: 41 patients with Hematological diseases were assessed on the SDS and the results were compared with normal control subjects. Results: Patients with Hematological diseases scored higher than the normal control subjects on depressed mood. Female patients had higher scores than the males. When compared to the patients with non-Hematological diseases, there were significant differences in females but not in males. Depressed mood in patients with Hematological diseases endorsed significantly more items on active-somatic and spirit-action than active depressed mood. Conclusion: Medical professions should consider the emotional aspects of patients in order to devise a more comprehensive plan for treatment.
