CWT - Pacific and Atlantic salmon sampling programs, (as well as those for other salmonids), have primarily involved the use of clipped adipose fins for collection of tagged heads/snouts (Johnson 1990 [Abstract]). With the implementation of mass marking (removal of the adipose fin to indicate hatchery stocks) and selective fisheries (selectively harvesting abundant hatchery stocks) in the Pacific Northwest, coded wire tag recovery now relies on electronic detection.
Tag recovery programs for striped bass, white seabass, lobster, paddlefish and others rely on hand operated magnetic detectors and tubes. The feasibility of automated recoveries from a herring fishery is described by Morrison (1990) [Abstract], Schweigert and Flostrand (2000) [Abstract]. Fishery samplers now use either the portable Wand or R-Series coded wire tag detectors for automated tag detection in many species.
VI Alpha - The visibility of these fluorescent tags in ambient light and the ability to be enhanced with blue LED light is an advantage.
VIE tags can be used with fluorescence enhancing light to identify stocks of adult chinook salmon tagged as fingerlings. (see Selected VIE References by Family: Salmonidae )
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