白点鲑的耗氧率及窒息点研究

Studied on the Oxygen Consumption Rate and Suffocated Point for the White Spotted Char

2009年在中国水产科学研究院黑龙江水产研究所渤海冷水鱼实验站,对2种不同体重规格的白点鲑的耗氧率、耗氧量及窒息点进行了测定,结果表明,白点鲑的耗氧率和窒息点随体重的增加而减小;耗氧量随体重的增加而增加。温度在13.08℃,平均体重2.06g的白点鲑平均耗氧率为6.14mg/(g·h),平均耗氧量为13.58mg(/尾·h);平均体重85.95g的白点鲑平均耗氧率为0.46mg/(g·h),平均耗氧量为39.69mg/(尾·h)。平均体重2.06g的白点鲑,窒息点为1.28mg/L,平均体重85.95g的白点鲑窒息点为0.96mg/L。同等规格白点鲑的昼夜耗氧率差异不显著,但其夜间平均耗氧率要高于白天。通过综合分析认为在9:00、12:00、18:00投喂,每天投喂3次,而且傍晚的投喂量占一天总量的3/5,从而有效提高饲料的利用率,也符合白点鲑的活动规律,有利于鱼体生长。

In 2009,at 13.08℃ of water temperature the oxygen consumption rate and suffocated point for two sizes of the white spotted char （Salvelinus Leucomaenis f.pluvius） were determined during the daytime and nighttime from 6：00 to 5：00 of the next day in Bohai Cold water Fish Experimental Station of Heilongjiang River Fishery Research Institute.The results showed that the oxygen consumption rate and suffocated point would be decreasing along with the increasing of the bodyweight of the white spotted char,but oxygen uptake would be increasing with the increasing of bodyweight.There were no significantly difference for the oxygen consumption rate at the same size in day and night,merely the mean oxygen consumption rate in the night time was higher that the daytime ＇ s.At the water temperature of 13.08℃,and the 2.06 g bodyweight of white spotted char,oxygen consumption rate,mean oxygen uptake and suffocated point was 6.14 mg/（g·h）,13.58 mg/（indi·.h） and 1.28 mg/L respectively,also in the same water temperature,the 85.95 g bodyweight of white spotted char,oxygen consumption rate,mean oxygen uptake and suffocated point was 0.46 mg/（g·h）,39.69mg/（indi.·h） and 0.96 mg/L respectively.Based on the above results,we fixed the optimal feeding time for white spotted char at 9：00,12：00 and 18：00 in the whole day,moreover at 12：00,the feeding amount accounted for 3/5 as the total amount.