[Study on oxygen consumption rate and suffocation point of Whitmania pigra].
OBJECTIVE
To study the oxygen consumption rate and suffocation point of Whitmania pigra.


METHODS
Using the method of respiratory chamber, the oxygen consumption rate, oxygen consumption volume and suffocation point were obtained.


RESULTS
The oxygen consumption rate(OCR) ranged from 0.049 to 0.094 mg x g(-1) x h(-1), the oxygen consumption volume(OCV) from 0.44 to 0.67 mg x p(-1) x h(-1), and suffocation point(SP) from 0.9 to 1.51 mg x L(-1), when the average weight of W. pigra was 10 g and the water temperature varied from 15 to 35 degrees C. OCR ranged from 0.044 to 0.058 mg x g(-1) x h(-1), OCV from 0.19 to 0.77 mg x p(-1) x h(-1) and SP from 1.4 to 1.57 mg x l(-1) when water temperature was 20 degrees C.


CONCLUSIONS
OCR rose when the water temperature and weight increased, but SP was justly opposite. The weight was negatively correlated with OCR and positively with OCV. OCR had little difference from day to night.
Institute of Chinese Medicinal Materials, Nanjing Agricultural University, China.
Hong-zhuan
HZ
Shi
Fei
F
Liu
Qiao-sheng
QS
Guo
D000818:Animals; D007865:Leeches / Q000378:metabolism* / Q000502:physiology; D010100:Oxygen / Q000378:metabolism*; D010101:Oxygen Consumption / Q000502:physiology*; D013696:Temperature; D014867:Water
D014867:Water; D010100:Oxygen