Effects of Tank Wall Color and Up-welling Water Flow on Growth and Survival of Eurasian Perch Larvae (Perca fluviatilis)
Effects of Tank Wall Color and Up-welling Water Flow on Growth and Survival of Eurasian Perch Larvae (Perca fluviatilis)
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DOI：
10.1111/j.1749-7345.2006.00042.x
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发表时间：
2006-09
影响因子：
2.8
通讯作者：
S. Jentoft;S. Øxnevad;A. Aastveit;Ø. Andersen
中科院分区：
文献类型：
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作者：
S. Jentoft;S. Øxnevad;A. Aastveit;Ø. Andersen
在集约化养殖系统中，研究了池壁颜色和上升流对河鲈仔鱼生长和存活的影响。新孵化的幼虫喂卤虫无节幼体，后来结合干饲料，饲养5周，无论是在黑色坦克与上升涌水流或在灰色坦克与或不上升涌水流。鲈鱼幼虫生长速度显着更快，在黑色的坦克比在灰色坦克，无论水流量。孵化后两周，一个显着更高的平均重量显示，在黑色的坦克饲养的幼虫相比，在灰色坦克饲养的幼虫上升的水流，4周后，平均重量显着高于其他两个治疗。在实验的最后一周期间，生长的差异进一步增强，并且最终平均重量在具有上升水流的黑色槽中为51.1 ± 1.9 mg，在具有上升水流的灰色槽中为23.8 ± 2.1 mg，在没有上升水流的灰色槽中为23.7 ± 2.2 mg。在所有处理组中，实验结束时的累积死亡率平均为75%。两者合计，欧亚鲈鱼幼虫在黑色坦克的增强增长可以解释高猎物对比度和增加猎物消费。上升流的水流没有影响的生长和存活的鲈鱼幼虫在灰色的坦克，表明的可用性和消费的猎物是独立的水的运动。
The influence of tank wall color and up-welling water flow on growth and survival of Eurasian perch larvae (Perca fluviatilis) was tested in an intensive culture system. Newly hatched larvae were fed Artemia nauplii, later combined with dry feed, and reared for 5 wk in either black tanks with up-welling water flow or in gray tanks with or without up-welling water flow. The perch larvae grew significantly faster in black tanks than in gray tanks regardless of water flow. Two weeks after hatching, a significantly higher mean weight was shown in larvae reared in black tanks compared to larvae reared in gray tanks with up-welling water flow, and after 4 wk, the mean weight was significantly higher than in both of the other treatments. The difference in growth was further enhanced during the last week of the experiment, and the final mean weights were 51.1 ± 1.9 mg in black tanks with up-welling water flow, 23.8 ± 2.1 mg in gray tanks with up-welling water flow, and 23.7 ± 2.2 mg in gray tanks without up-welling water flow. The cumulative mortality at the end of the experiment averaged 75% in all treatment groups. Taken together, the enhanced growth of Eurasian perch larvae in black tanks could be explained by high prey contrast and increased prey consumption. Up-welling water flow had no impact on growth and survival of the perch larvae in gray tanks, indicating that the availability and consumption of the prey were independent of water movement.