Effects of passive integrated transponder (PIT) implantation on Pacific lamprey ammocoetes Animal Biotelemetry

Little is known of the larval biology of Pacific lamprey (Entosphenus tridentatus), a species of conservation concern. With miniaturization of passive integrated transponder (PIT) tags, researchers now have the potential to individually mark larval lamprey. However, recent studies with sea lamprey (Petromyzon marinus) ammocoetes indicated that mortality was unacceptably high after surgical implantation of these tags. We examined survival, tag retention, growth, and swimming performance of Pacific lamprey ammocoetes tagged with uniquely coded 8.4-mm PIT tags and controls marked with visible implant elastomer (VIE).

目前学界对太平洋七鳃鳗（Entosphenus tridentatus）的幼体生物学特性尚缺乏深入了解，该物种为保育关注物种。随着被动集成应答器（PIT）标签的小型化，研究人员现已具备对七鳃鳗幼体开展个体标记的可行条件。然而，近期针对海七鳃鳗（Petromyzon marinus）仔七鳃鳗的相关研究表明，通过外科手术植入此类标签后，其死亡率达到了难以接受的水平。本研究针对植入唯一编码8.4毫米PIT标签的太平洋七鳃鳗仔七鳃鳗，以及采用可视植入弹性体（VIE）标记的对照组个体，考察了其存活率、标签保留率、生长性能与游泳表现。