Literature review and considerations for effective capture and relocation of freshwater fish for in-water projects / by Sophie G. LeBlanc and Tyler D. Tunney. : Fs97-6/3636E-PDF

"Capture and relocation (C&R) of fish is a mitigation measure commonly used during in-water projects. The Fish and Fish Habitat Protection Program (FFHPP) has requested scientific information on the use and effectiveness of C&R to inform future development of standards and codes of practice. As such, we conducted an abridged systematic literature review and summarized Canadian government web information on the use of C&R for freshwater fishes. Our review suggested that literature specific to freshwater fish C&R activities is limited. Of the 23 documents retained, 10 concerned larval Pacific Lamprey (Entosphenus tridentatus) salvages, and only one study attempted to assess effectiveness of lamprey-specific C&R protocols by estimating mortality. Two other studies reported the effectiveness of capture methods at removing fish from dredging worksites. Based on the results of our review, we present preliminary considerations for the development of freshwater fish C&R guidance, divided into five steps: 1) pre-capture, 2) capture, 3) handling, 4) holding and transporting, and 5) release. These considerations include the ecology of species present, knowledge about gear catchability and mortality, environmental conditions, and features of the release site. Moreover, we include available guidelines, permitting and reporting requirements for C&R of freshwater fishes in Canada, and conclude with recommendations for future research. Overall, this document serves as an initial step in compiling knowledge on freshwater fish C&R activities for DFO"--Abstract, page v.

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