Title: The Constant Acceleration Swimming Performance in Juvenile Chinese Bream(Parabramis pekinensis)
Abstract: To investigate the constant acceleration swimming performance of juvenile Chinese bream(Parabramis pekinensis),32 Chinese bream juveniles were selected and divided into 4groups(control group,n=8;treatment groups,n=3×8),and reared at(25±1)℃.Then the constant acceleration speed(Ucat)and the duration of measurement process(t)of experiment fish under acceleration of 0.1,0.2,0.4cm·s-2 were measured.Then,the plasma,white muscle and liver were sampled for biochemical indicator measurements immediately after Ucattests(the fish in control group were sampled without swimming).The Ucatwere 62.85,73.66 and 75.62cm·s-1 in 0.1,0.2,0.4cm·s-2 acceleration groups.There was no significant difference in Ucatbetween 0.2and0.4cm·s-2 acceleration groups,but Ucatof both groups were significantly higher than that of 0.1cm·s-2 acceleration group(p0.05).The t decreased significantly with the increase of acceleration rate(p0.05),and the values were 632,349 and 174s,respectively,in 0.1,0.2,0.4cm·s-2 acceleration groups.The white muscle lactate content([lactate])and plasma [lactate]increased with the increase of acceleration.The white muscle[lactate]and plasma[lactate]were significant higher than that of control group when acceleration rate was 0.4cm·s-2.There were no significant difference in liver[lactate]among control and three treatment groups.The white muscle[glucose]of treatment groups significantly increased with the increase of acceleration.Whereas white muscle[glucose]of 0.1cm·s-2 was significantly lower than that of control group(p0.05).There were no significant differences in white muscle[glycogen]among control and treatment groups.The results show that the Ucatand white muscle[lactate]increased,but t became shorter with the increase of acceleration rate possibly due to the increased recruitment of anaerobic metabolism.The plasma[lactate]increased after Ucattest due to the release of muscle lactate.The acceleration swimming capacity hence swimming distance was related to the substrate consumption in Chinese bream juvenile.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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