摘要
实验测定了不同水温条件下刀鲚(Coilia nasus)幼鱼的耗氧率和窒息点,并对耗氧率的昼夜变化规律以及水温对刀鲚幼鱼血糖及肌肝糖元指标的影响进行了研究,旨在为刀鲚运输、养殖生产中制定合理的放养密度和养殖工艺提供参考依据。结果表明:在试验水温(16℃～28℃)条件下,刀鲚幼鱼的耗氧率随水温的升高而增大,耗氧率(R)与水温(T)的回归方程为R=0.988T2-32.36T+343.7,相关系数为0.96;刀鲚幼鱼的耗氧率具有昼夜节律性,耗氧高峰出现在7:00,低谷在21:00;刀鲚幼鱼的窒息点与水温显著相关,窒息点A(mg·L-1)与水温T(℃)的回归关系为A=0.9397T0.8001,R2=0.98。刀鲚幼鱼血清中血糖含量在水温16℃～24℃阶段保持相对稳定,血糖含量在17.24～19.79mmol·L-1,肌肉和肝脏糖元含量均呈波浪式变动;但在水温24℃～28℃阶段,血糖含量随水温上升而显著升高,而肌肉和肝脏糖元含量均显著降低。
In order to supply reference for the rational breeding and transportation of Coilia nasus, a laboratory experiment was conducted to measure the oxygen consumption rate （OCR） and asphyxiation point （AP） of juvenile C. nasus under different water temperature, and to study the diurnal variations of the OCR as well as the effects of water temperature on the blood glucose and muscle- and liver glycogen of the juveniles. At water temperature （ T, ℃ ） 16-28 ℃ , the OCR （ R, mg· L-1 ） of the juveniles increased with increasing temperature, and there was a linear re lationship between the R and T （R=0. 988T2-32.36T＋343.7, R： =0.96）. The OCR revealed a diurnal rhythm, with the peak at 7：00 am and the bottom at 9：00 pm. The AP （A, mg · L-1 ） was significantly correlated to T （A = 0. 9397T0.8001, R2 = 0.98 ）. At water temperature 16-24 ℃, the blood glucose content of the juveniles kept relatively steady and ranged from 17.24 to 19.79 mmol · L-1 , while the muscle and liver glycogen content fluctuated. At water temperature 24-28 ℃, the blood glucose content increased significantly with increasing temperature, while the muscle and liver glycogen content had a significant decrease.
出处
《生态学杂志》
CAS
CSCD
北大核心
2012年第12期3116-3120,共5页
Chinese Journal of Ecology
基金
国家科技支撑计划项目(2012BAD26B05)
公益性行业(农业)科研专项(201203065)
江苏省科技支撑计划(农业)项目(BE2011411)
江苏省水产三新工程重大专项(DZ2012-1)资助
关键词
刀鲚
耗氧率
窒息点
血糖
肌肝糖元
Coilia nasus
oxygen consumption rate
asphyxiant point
blood glucose
muscleand liver glycogen.
