The failure of initial swim bladder inflation (SBI) is one of the main obstacles to successful results in Zander (also known as Pikeperch) Sander lucioperca larviculture because the larvae are unable to penetrate the oil layer on the water surface to gulp air. There are numerous technical solutions for cleaning the water surface, including using a sprayer to emulsify the oil contamination and a skimmer for trapping the oil globules on the surface. To investigate the most appropriate method for improving the SBI success rate, three different devices were evaluated in triplicate tanks. In addition to the control tanks, which were not equipped with any surface‐cleaning device other than overflow mesh, two sprayer designs (narrow, covering one‐third of the tank's diameter, versus wide, covering the tank's entire diameter) and an air‐blowing surface skimmer were set for a 16‐d trial. Freshly hatched larvae (7,000 per tank) were divided into four treatment groups in twelve 250‐L larval nursing tanks that shared a common recirculation system. Significantly higher rates of SBI were found in the tanks that were equipped with a wide‐covering sprayer (30.6 ± 13.0%) compared with the control, skimmer, and narrow‐covering sprayer groups (14.7 ± 7.5%, 4.8 ± 1.7%, and 12.2 ± 5.1%, respectively). Thus, the results of the present study indicate that the sprayer design that covers a large portion of the tank’s diameter is an appropriate solution for enhancing SBI rates in Zander larviculture.

中文翻译：

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不同表面清洁设备对赞德幼虫游泳膀胱充气成功的影响

初始游泳膀胱充气（SBI）的失败是Zander（也称为Pikeperch）Sander lucioperca取得成功的主要障碍之一进行幼虫养殖，因为幼虫无法穿透水表面的油层以吞噬空气。清洁水面的技术解决方案很多，包括使用喷雾器来乳化油污，以及使用撇油器将油滴留在表面。为了研究提高SBI成功率的最合适方法，在一式三份的储罐中评估了三种不同的设备。除了没有溢流筛网以外没有配备任何表面清洁装置的控制罐外，还有两种喷雾器设计（狭窄，占罐直径的三分之一，而较宽，占罐直径的一半）和空气-将吹塑表面撇渣器进行16天试验。刚孵出的幼虫（7，000个/箱）被分成12个250-L幼体护理箱，每个处理组共享一个共用的再循环系统，将其分为四个治疗组。与对照组，撇渣器和窄覆盖喷雾器组（14.7±7.5％，4.8±1.7％和分别为12.2±5.1％）。因此，本研究的结果表明，覆盖罐直径很大一部分的喷雾器设计是提高Zander幼虫SBI率的合适解决方案。分别）。因此，本研究的结果表明，覆盖罐直径很大一部分的喷雾器设计是提高Zander幼虫SBI率的合适解决方案。分别）。因此，本研究的结果表明，覆盖罐直径很大一部分的喷雾器设计是提高Zander幼虫SBI率的合适解决方案。