Abstract
Abstract Despite heightened concern for potential adverse effects of electrofishing on fish, little information is available on the effects of electrofishing on juvenile fish. The purpose of our study was to determine if electrofishing impairs the survival and development of embryonic brook trout Salvelinus fontinalis. Brook trout embryos, both uncovered and buried in an artificial redd, were electroshocked at 21 d postfertilization (pre-eyed). Uncovered embryos also were electroshocked at 37 d postfertilization (eyed). When electroshocked, pre-eyed embryos suffered greater embryo mortality (85%) and incidence of hatchling morphological anomalies (22%) than unshocked embryos (14% and 7%, respectively), whereas hatching times and hatchling weights were similar between groups. Emergence from electroshocked pre-eyed embryos also was significantly lower (23%) than from unshocked embryos (67%), and the mean time at which fish emerged was longer for shocked embryos (88 d) than for unshocked embryos (85 d). Surv...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.