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为了考察持续水流刺激对青鱼幼鱼体型特征的影响,在(25±0.5)℃水温条件下,将大小相当的144尾体质量为(11.90±0.24)g、体长为(8.94±0.31)cm的实验鱼随机分为对照组、9cm/s、18cm/s和36cm/s处理组,分别在不同水流速度下处理8周.随后从各组中各随机挑选12尾实验鱼,测量分析其体型特征参数变化.结果显示:9cm/s处理组的头长和头长/体长显著大于对照组(p<0.05);18cm/s处理组的头长、头高、体高、叉长、鱼体侧面积和头长/体长显著大于对照组(p<0.05);36cm/s处理组的头长、头高、尾柄下侧长度、尾柄侧面积、头长/体长和尾柄侧面积/鱼体侧面积显著大于对照组(p<0.05),其他形态参数较对照组无显著差异.结果表明:持续水流刺激显著影响了青鱼幼鱼的体型特征;高流速(36cm/s)刺激下青鱼幼鱼的尾柄面积显著增加,这可能有利于其游泳能力的改善.
In order to investigate the effect of continuous flow stimulation on the body shape of juvenile black carp, the size of 144 sounder body (11.90 ± 0.24) g and (8.94 ± 0.31) cm body length at the water temperature of (25 ± 0.5) ℃ Of experimental fish were randomly divided into control group, 9cm / s, 18cm / s and 36cm / s treatment group, respectively, at different water flow rates for 8 weeks, then randomly selected from each group of 12 experimental fish, measurement and analysis of their size The results showed that the head length and head length / body length of the 9 cm / s treatment group were significantly greater than those of the control group (p <0.05). The head length, head height, body height, fork length, Side length and head length / body length were significantly larger than those in the control group (p <0.05). The head length, head height, length of the caudal peduncle, caudal peduncle area, head length / body length and caudal peduncle (P <0.05), and the other morphological parameters were not significantly different from those of the control group.The results showed that continuous flow stimulation significantly affected the body size of juvenile blue carp (Ictalurus punctatus) and high flow rate (36 cm / s) The area of caudal peduncle of young herring juveniles significantly increased, which may be conducive to the improvement of swimming ability.