几种孔径气泡幕对黑鲷的阻拦作用

探讨了三种不同孔径固定气泡幕对黑鲷的阻拦作用,结果表明:孔径0.3,0.5,0.8mm三种气泡幕对黑鲷都具有明显的阻拦作用,平均阻拦率分别为47.0％,75.1％和50.1％.方差分析表明,0.5mm孔径气泡幕与0.3mm和0.8mm孔径气泡幕阻拦有明显差异(P<0.01),而0.3mm与0.8mm却差别不大,三种孔径气泡幕在重复实验中,第一次的阻拦率都比后两次低,该种鱼对三种气泡幕均无明显的适应现象。

The Intercepting Effects of Bubble Curtains with Different Hole Diameters on Black Porgy (Sparus macrocephalus)

In order to investigate the intercepting etrecis 01 mmrnovdure bubble curtains(IBC) with different aie-hole diameters to black porgy (Sparus macrccephalus), some aquarium experiments were conducted in laboratory. Obvious intercepting effects of tltose IBC 10 the fish were observed, but those BC were not the complete obstacles to black porgy. The average obstructing lates were 47.0%, 75.1% and 50.1% for 0.3 mm, 0.5 mm and 0.8 mm diameters respectively. The result showed that the intercepting effects of IBC were affected significantly with the air-hole diameter. There was significant difference(P<0.01) between the obstructing rate of 0.5 mm IRC and that of 0.3 mm or 0.8 mm. However, there was no significant difference between 0.3 mm and 0.8mm. In addition, the obstructing rale of 1st time experiment was lower than that of 2nd or 3rd in each IBC experiment, and the fish had no markes adaptation 10 those three IBC.