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Evaluation of razorback sucker and colorado squawfish batch marking techniques

机译：剃刀背吸盘和科罗拉多鳞鱼批标技术的评价

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摘要

Young razorback sucker Xyrauchen texanus (mean total length [TL] = 127 mm) and Colorado squawfish Ptychocheilus lucius (mean TL = 150 mm) were marked by freeze branding and injection of a fluorescent elastomer. The elastomer injection was made at the base of the anal fin and oil the operculum (razorback suckers) or lower jaw (Colorado squawfish) and consisted of one or' four colors: green, blue, red. or orange. Freeze branding had 99% retention after 15 months for both species. Elastomer recognition was better for Colorado squawfish (mean 74%) than for razorback suckers (mean 60%) after 15 months, and retention at both locations was similar. Red and orange had the best recognition and blue had the poorest. Red and orange elastomer injected in young Colorado squawfish could be detected (95%) for 5 months. One person implanting elastomer at two locations on each lish and one person anesthetizing and handling fish can mark 130-140 fish/h. Approximately three times that number can be freeze-branded per hour. Greater retention times and efficiency in marking makes the use of freeze branding a practical replacement for tagging with passive integrated transponders during the first two growing seasons.
机译：剃刀幼仔吸盘Xyrauchen texanus（平均总长[TL] = 127 mm）和Colorado鳞鱼Ptychocheilus lucius（平均TL = 150 mm）通过冷冻烙印和注入荧光弹性体进行标记。弹性体注射是在肛门鳍的基部进行的，并向腹膜（剃刀背吸盘）或下颌（科罗拉多鳞鱼）上油，并由一种或四种颜色组成：绿色，蓝色，红色。或橙色。两种品牌在15个月后的冻结商标保留率均为99％。 15个月后，科罗拉多州鳞鱼的弹性体识别效果更好（平均74％），比剃刀吸盘的弹性体识别效果更好（平均60％），并且在两个位置的滞留率相似。红色和橙色识别度最高，蓝色最差。可以检测到（五个月）科罗拉多幼鱼中注射的红色和橙色弹性体（95％）。一个人在每种情况下的两个位置植入弹性体，而一个人麻醉和处理鱼的速度为每小时130-140鱼。每小时大约可以冻结品牌数量的三倍。更长的保留时间和更高的标记效率使冷冻商标的使用成为在头两个生长季节中使用无源集成应答器进行标记的实用替代品。

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