Evaluation of Sprayed Fluorescent Pigment as a Method to Mass-Mark Fish Species
David A. Schumann1, Keith D. Koupal2, *, W. Wyatt Hoback1, Casey W. Schoenebeck1
Identifiers and Pagination:Year: 2013
First Page: 41
Last Page: 47
Publisher Id: TOFISHSJ-6-41
Article History:Received Date: 10/12/2012
Revision Received Date: 07/03/2013
Acceptance Date: 15/03/2013
Electronic publication date: 17/5/2013
Collection year: 2013
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
A technique for mass-marking fish was evaluated that forces fluorescent pigment into dermal tissue with compressed air. A five month trial was conducted where mark retention, readability, and marking mortality were evaluated with six fish species that represent a variety of taxonomic groups. Approximately 100 of each species were marked; a percentage with fluorescent sprayed pigment and visible implanted elastomer (VIE) and the remaining with bilaterally distinct VIE tags. Marking mortality ranged from 0 to 100 percent and for three species mortality was size dependent. Mark retention declined at different rates for each species and ranged from 6 to 65 percent after five months. False-positive values and imperfect mark detection on poorly marked individuals affected retention. Growth of marked fish compared to unmarked control groups was significantly lower for two species. Because of inconsistency within and among species, fluorescent spray procedures need refinement and additional assessment prior to fisheries application.