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Evaluation of Visible Implant Elastomer Tags in Wild Coastal Cutthroat Trout in the Marine Environment
North American Journal of Fisheries Management ( IF 1.1 ) Pub Date : 2020-08-19 , DOI: 10.1002/nafm.10507
James P. Losee 1, 2 , Hannah S. Faulkner 1 , Todd R. Seamons 1
Affiliation  

We evaluated the detectability of visible implant elastomer (VIE) tags in Coastal Cutthroat Trout Oncorynchus clarkii clarkii in the marine environment by comparing visually identified recaptures from VIE tags with known recaptures that were identified through genotype matching. A total of 89 individual Coastal Cutthroat Trout were marked in the lower jaw with colored VIE tags, sampled for genetics, and recaptured across 12 months in 2015. The rate of correspondence between the VIE tags and genetic matches was 92% (82/89) of the recaptured Coastal Cutthroat Trout in the nearshore marine environment. We found that red‐ and blue‐colored VIE tags were detected at a higher rate (100%) than were yellow‐ and orange‐colored tags (87.3% and 90.6%, respectively). In contrast, tag type (single or double), tag location (left or right), fish length (FL, mm), and time (days) since tagging had no effect on tag detectability during the study period. All of the tag colors were recovered for the maximum life of the study (up to 342 days). In all of the cases of nondetections (5/89), the tags were not identified upon initial recapture or subsequent capture events, suggesting that they were lost or not visible immediately upon insertion in the field—as opposed to being unidentified due to the degradation of tag detectability over time. The results of this study suggest that VIE tags have the potential to be detectable in juvenile and adult Coastal Cutthroat Trout for at least 12 months after insertion, with blue and red performing the best. Additional monitoring extending beyond 12 months after tagging would be necessary to identify the maximum life of VIE tags.

中文翻译:

海洋环境中的野生沿海割喉鳟鱼中可见的植入物弹性体标签的评估

我们评估了沿海割喉鳟鱼Oncorynchus clarkii clarkii中可见植入物弹性体(VIE)标签的可检测性。通过比较VIE标签的视觉识别捕获物与通过基因型匹配识别的已知捕获物,在海洋环境中进行捕获。2015年,总共有89个独立的沿海凶猛鳟鱼在下颌上标记有彩色VIE标签,用于遗传学采样,并在12个月内重新捕获。VIE标签与遗传匹配之间的对应率为92%(82/89)捕捞的近岸海洋环境中的死海鳟鱼。我们发现,红色和蓝色VIE标签的检出率(100%)高于黄色和橙色VIE标签的检出率(分别为87.3%和90.6%)。相反,标记的类型(单个或双重),标记的位置(左侧或右侧),鱼的长度(FL,mm)和自标记以来的时间(天)对研究期间的标记可检测性没有影响。恢复所有标签颜色,以达到研究的最长寿命(最长342天)。在所有未检测到的情况下(5/89),在初次捕获或随后的捕获事件中均未识别出标签,这表明它们在插入现场后立即丢失或不可见-而不是由于降解而无法识别标签可检测性随时间的变化。这项研究的结果表明,VIE标签在插入后至少12个月内有可能在少年和成年的沿海Cut鳟中被检测到,其中蓝色和红色的表现最佳。为确定VIE标签的最长使用寿命,有必要进行额外的监控(在添加标签后超过12个月)。最初重新捕获或随后的捕获事件未识别出标签,这表明它们在插入现场后立即丢失或不可见-与之相反,由于标签可检测性随时间下降而无法识别。这项研究的结果表明,VIE标签在插入后至少12个月内有可能在少年和成年的沿海Cut鳟中被检测到,其中蓝色和红色的表现最佳。为确定VIE标签的最长使用寿命,有必要进行额外的监控(在添加标签后12个月以上)。最初重新捕获或随后的捕获事件未识别出标签,这表明它们在插入现场后立即丢失或不可见-与之相反,由于标签可检测性随时间下降而无法识别。这项研究的结果表明,VIE标签在插入后至少12个月内可以在少年和成年的沿海凶猛鳟鱼中被检测到,其中蓝色和红色表现最佳。为确定VIE标签的最长使用寿命,有必要进行额外的监控(在添加标签后12个月以上)。这项研究的结果表明,VIE标签在插入后至少12个月内有可能在少年和成年的沿海Cut鳟中被检测到,其中蓝色和红色的表现最佳。为确定VIE标签的最长使用寿命,有必要进行额外的监控(在添加标签后12个月以上)。这项研究的结果表明,VIE标签在插入后至少12个月内有可能在少年和成年的沿海Cut鳟中被检测到,其中蓝色和红色的表现最佳。为确定VIE标签的最长使用寿命,有必要进行额外的监控(在添加标签后12个月以上)。
更新日期:2020-08-19
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