捕捞操作胁迫对红鲫幼鱼的影响（英文）

Effects of fishing handling stress on juvenile red crucian carp(Carassius auratus red variety)

研究了不同强度捕捞胁迫对体重为(7.30±1.48)g红鲫幼鱼的体长、体重、肥满度、摄食率、特异生长率、食物转化率、肠道蛋白酶、淀粉酶以及免疫球蛋白的影响。结果表明,与对照组相比,捕捞胁迫对红鲫幼鱼的体长、体重、肥满度、摄食率、特异生长率均有明显的抑制作用,而且随着胁迫时间的延长和幅度的加剧,抑制作用加大。捕捞胁迫能升高红鲫幼鱼的食物转化率,但不同强度的胁迫对其影响差别不显著。其对肠道蛋白酶活性的影响初期降低,随后升高,最终与对照组水平趋于一致。高胁迫组加速了幼鱼肠道内淀粉酶活性的下降。胁迫使红鲫幼鱼免疫球蛋白数量明显增高,但随胁迫时间延长,增高现象消失。

The essay studies the influence of the different intensities of fishing stress on body weight （7.30 ± 1.48） g of red crucian carp juvenile body length, weight, fatness, feeding rate, specific growth rate, food conversion rate, intestinal protease, amylase and immunoglobulin. The result showed that body length, weight, fatness, feeding rate, specific growth rate of red crucian carp juvenile were significantly inhibited from fishing stress compared with the control group, and the magnitude of the inhibitory effect increased with the time going and increased. Fishing stress could increase the food conversion rate of red crucian carp juvenile, and the different intensity stress had no significant different influence. The intestinal protease activity decreased in the beginning, then increased, and was consistent with the level of the control group ultimately. High-stress group accelerated the decline of intestinal amylase activity of the juvenile. The stress increased the number of immunoglobulin of juvenile red crucian carp significantly, but the increase disappeard with the stress time extended.