Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario, Canada.
Glenora Fisheries Station, Ontario Ministry of Natural Resources and Forestry, Picton, Ontario, Canada.
J Fish Biol. 2019 Oct;95(4):1094-1106. doi: 10.1111/jfb.14102. Epub 2019 Aug 5.
In this study, we investigated the effects of acoustic tag implantation on standard and routine metabolic rate (SMR and RMR, estimated via oxygen consumption), critical swimming speed (U ), survival and growth in juveniles of rainbow trout Oncorhynchus mykiss and lake trout Salvelinus namaycush. Tag burdens ranged from 1.8% to 7.5% across the two species. Growth rates in acoustic-tagged fish were equal to or higher than those in other treatments. Acoustic-tagged S. namaycush had a marginally lower U than controls but that effect was not replicated in the O. mykiss experiment. Tagging did not have clear effects on metabolic rate but there was an interaction whereby SMR and RMR tended to increase with time since surgery in tagged O. mykiss but not in other treatments (the same trend did not occur in S. namaycush). Survival was high across treatments (mean 98% survival among O. mykiss, 97.5% among S. namaycush). There were no statistically significant effects of tag burden (percentage of body mass) except for a weak negative relationship with growth rate (across species) and a weak positive relationship with U but only in the O. mykiss. Collectively, our findings suggest there were minor, context-dependent effects of acoustic tagging in juvenile S. namaycush and O. mykiss during an eight-week laboratory experiment. Further research will be required to assess whether tagging can cause meaningful behavioural effects in these species in captivity or in the wild and whether there is a tag burden threshold above which deleterious effects consistently occur.
在这项研究中，我们调查了声学标签植入对标准和常规代谢率（SMR 和 RMR，通过耗氧量估计）、临界游泳速度（U ）、虹鳟 Oncorhynchus mykiss 和湖鳟 Salvelinus namaycush 幼鱼的存活和生长的影响。两种鱼的标签负担从 1.8%到 7.5%不等。被声学标记的鱼的生长速度与其他处理方法相等或更高。被声学标记的 S. namaycush 的 U 比对照组略低，但在 O. mykiss 实验中没有复制到该效果。标记对代谢率没有明显影响，但存在一种相互作用，即 O. mykiss 中 SMR 和 RMR 随着手术后的时间推移而趋于增加，但在其他处理方法中则没有（在 S. namaycush 中则没有出现相同的趋势）。在所有处理方法中，存活率都很高（O. mykiss 的平均存活率为 98%，S. namaycush 的存活率为 97.5%）。除了与生长率（在两个物种中）呈弱负相关以及与 U 呈弱正相关外（仅在 O. mykiss 中），标签负担（体重的百分比）没有统计学上的显著影响。总的来说，我们的研究结果表明，在八周的实验室实验中，声学标记对幼年 S. namaycush 和 O. mykiss 有轻微的、依赖于背景的影响。需要进一步的研究来评估标记是否会在这些物种的圈养或野外环境中引起有意义的行为影响，以及是否存在一个标签负担阈值，超过该阈值后，有害影响会持续发生。
