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首页> 外文期刊>The Open Fish Science Journal >Acoustic Transmitters Impact Rainbow Trout Growth in a Competitive Environment
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Acoustic Transmitters Impact Rainbow Trout Growth in a Competitive Environment

机译：竞争环境中的声发射器影响虹鳟的生长

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Fish implanted with acoustic transmitters are assumed to behave and grow after stocking similar to untagged fish. In this study, three groups (tagged, sham, and control) of rainbow trout Oncorhynchus mykiss [mean (SD) initial length = 277 (24) mm] range were maintained together in three raceways for 90 days, with each raceway containing 10 tagged, 10 sham, and 10 control fish. The fish in the tagged group were anesthetized and had an inert transmitter inserted via a ventral incision. Fish in the sham group were anesthetized and had an incision without transmitter implantation, while the control group was anesthetized only. In each raceway, trout with the inert transmitters were significantly lighter and shorter than fish from the other two groups at the end of the experiment. However, the reduction in weight, length, and specific growth rate occurred primarily during the first 38 days post-tagging, with tagged fish growing at similar rates to the other two groups for the final 52 days of the experiment. Mortality data indicated a survival threshold of 280 mm length in the tagged fish, with 100% survival of the Rainbow Trout greater than 280 mm and only 59.1% survival of trout less than 280 mm. Based on the results of this study, rainbow trout implanted with 9 x 24 mm, 3.6 g acoustic transmitters should be held prior to release for a minimum of 38 days to ensure similar growth rates as untagged conspecifics, and only trout with an initial length greater than 280 mm should be used to maximize survival.
机译：假定植入声发射器的鱼放养后的行为和生长与未贴标签的鱼相似。在这项研究中，三组虹鳟Oncorhynchus mykiss [平均（SD）初始长度= 277（24）mm]范围的三组（带标记，假和对照）在三个跑道上保持90天，每个跑道包含10个带标签的，10条假鱼和10条对照鱼。将标记组中的鱼麻醉，并通过腹侧切口插入惰性发射器。假手术组中的鱼被麻醉并切开切口而没有植入发射机，而对照组仅被麻醉。在每个赛道上，带有惰性发射器的鳟鱼在实验结束时比其他两组的鱼都轻得多，也更短。但是，体重，身长和特定生长率的减少主要发生在标记后的前38天，在实验的最后52天中，标记鱼的生长速度与其他两组相似。死亡率数据表明，加标签的鱼的生存阈值为280 mm，其中虹鳟的100％生存大于280 mm，鳟鱼的仅有59.1％生存小于280 mm。根据这项研究的结果，植入9 x 24 mm，3.6 g声发射器的虹鳟鱼应在放行前至少保持38天，以确保与未标记的同种异体相似的生长速度，并且只有初始长度更长的鳟鱼才能生长大于280毫米应用于最大程度地延长生存期。

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