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首页> 外文期刊>North American Journal of Aquaculture >Baffled and standard raceways: a comparison of juvenile spring Chinook salmon performance and smolt-to-adult survival.
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Baffled and standard raceways: a comparison of juvenile spring Chinook salmon performance and smolt-to-adult survival.

机译：令人困惑的和标准的跑道：比较幼小的春努努克鲑鱼的性能和成年至成年的生存。

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摘要

We compared on-station mortality, growth (mm), feed conversion, health parameters, and smolt-to-adult survival rate of spring Chinook salmon Oncorhynchus tshawytscha reared in baffled and standard (unbaffled) raceways. Fish reared in baffled raceways survived from release to adulthood at a rate 0.85 times that of fish reared in unbaffled raceways. There was no difference in percent on-station mortality (range, 0.00-0.001), health, or average length gained (1-12 mm) between fish reared in baffled and unbaffled raceways. Average feed conversion was constant (1.20-2.25) throughout the period of juvenile rearing and was similar between fish reared in baffled and unbaffled raceways, a finding supported by adiposomatic and hepatosomatic indices. Overall, we found similar on-station performance between fish reared in baffled and unbaffled raceways. The difference between SARs of fish reared in baffled versus unbaffled raceways was not statistically significant (P=0.08). However, it is suggestive of a biological difference between the two treatments. The self-cleaning characteristics of baffled raceways free up a substantial amount of hatchery personnel time to attend to other duties, which ultimately reduces the annual operation budget for any facility. In the end, the self-cleaning feature of baffled raceways needs to be weighed against any advantage in adult survival of fish reared in unbaffled raceways.
机译：我们比较了在折流板和标准（不折流）管道中饲养的春季奇努克鲑鱼（i> Oncorhynchus tshawytscha ）的站内死亡率，生长（mm），饲料转化率，健康参数和从鲑到成年的成活率。在折流道中养殖的鱼从放行到成年存活率是未折流道中养殖的鱼的0.85倍。在有挡板和无挡板水道中饲养的鱼之间，在站内死亡率百分比（范围0.00-0.001），健康状况或获得的平均长度（1-12毫米）方面没有差异。在幼鱼饲养期间，平均饲料转化率是恒定的（1.20-2.25），在有挡板的和无挡板的水道中养殖的鱼之间相似，这一发现得到了脂肪代谢和肝体指数的支持。总体而言，我们发现在挡板式和非挡板式水道中饲养的鱼类在站上性能相似。挡板式和非挡板式水道中饲养的鱼的SAR比值之间差异无统计学意义（ P = 0.08）。然而，这暗示了两种治疗之间的生物学差异。带挡板的水道的自清洁特性使孵化场的人员有大量时间去执行其他职责，从而最终减少了任何设施的年度运营预算。最后，需要权衡折流道的自清洁功能与在不折流道中饲养的鱼类成年生存的任何优势。

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