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当前位置: 首页 > 文章 > 管角螺窒息点及昼夜代谢规律 应用生态学报 2008,19 (9) 2092-2096
Position: Home > Articles > Suffocation point and diurnal metabolism pattern of Hemifusus tuba (Gmelin) Chinese Journal of Applied Ecology 2008,19 (9) 2092-2096

管角螺窒息点及昼夜代谢规律

作  者：
罗杰;刘楚吾;李锋;唐洪超
单  位：
广东海洋大学海洋生物研究所
关键词：
管角螺;窒息点;标准代谢;常规代谢
摘  要：
在水温(22±0.5)℃下,按管角螺壳高设置S[(6.48±0.46)cm]、M[(7.59±0.41)cm]和L[(9.08±0.37)cm]3组,研究了管角螺的窒息点及其昼夜代谢规律.结果表明:1)当水中的溶解氧(DO)含量大于临界值4.37mg·mL-1时,管角螺的耗氧率为1.81mg·g-1.h-1,并处于相对稳定状态;DO低于此值,耗氧率随DO的下降而降低,0.43mg·mL-1的DO为管角螺的窒息点(耗氧率为0);2)管角螺的标准代谢(SM)和常规代谢(RM)随体质量的增加而降低,不同壳高处理组昼夜变化规律相同,即夜间代谢强于白天,但不同处理组SM(F=36.263,P<0.01)和RM(F=6.788,P<0.01)差异均极显著;S、M和L组特殊动力代谢的峰值分别为2.11、1.62和1.42mg·g-1.h-1,分别为其SM的2.09、1.75和1.71倍,持续时间均为15h;S、M和L组分别在食后24、24和27h达到排氨率的高峰,峰值分别为3.94、2.64和1.71μmol.g-1.h-1,分别为其饥饿状态下排氨率的1.87、1.73和1.31倍.
译  名：
Suffocation point and diurnal metabolism pattern of Hemifusus tuba (Gmelin)
作  者：
LUO Jie,LIU Chu-wu,LI Feng,TANG Hong-chao(Institute of Marine Biology,Guangdong Ocean University,Zhanjiang 524025,Guangdong,China)
关键词：
Hemifusus tuba(Gmelin);suffocation point;standard metabolism;routine metabolism
摘  要：
The individuals of Hemifusus tuba(Gmelin)were divided into 3 groups,i.e.,small [S,(6.48±0.46)cm],medium[M,(7.59±0.41)cm],and large[L,(9.08±0.37)cm],according to their shell height,and their suffocation points and diurnal metabolism patterns were investigated at water temperature(22±0.5)℃.The results indicated that the oxygen consumption rate of H.tuba was relatively stable and maintained at 1.81 mg·g-1·h-1 when dissolved oxygen(DO)content was higher than 4.37 mg·L-1,but decreased with decreasing DO when DO content was lower than 4.37 mg·L-1.0.43 mg·L-1 of DO was the suffocation point of H.tuba,with the oxygen consumption rate being 0.The standard metabolism(SM)and routine metabolism(RM)of H.tuba decreased significantly with increasing body mass,and changed with the same pattern in the 3 groups,i.e.,being higher at night than in daytime.There was a significant difference in the SM(F=36.263,P<0.01)and RM(F=6.788,P<0.01)among the 3 groups.The peak values of the specific dynamic metabolism of groups S,M,and L were 2.11,1.62,and 1.42 mg·g-1·h-1,being 1.09,0.75,and 0.71 times higher than their SM,respectively,and maintained about 15 h.The ammonia excretion rates of groups S,M,and L reached the peak after 24,24,and 27 hours of feeding,with the peak values being 3.94,2.64,and 1.71 μmol·g-1·h-1,and 0.87,0.73 and 0.31 times higher than those in starvation state,respectively,.

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