Examines practical aspects of ichthyology covered in BIOL 4741. Field trips to freshwater sites focus on assessing population size, habitat preference, and species diversity. Laboratory exercises will include dissections, fish capture techniques, fish ageing, and computation of common metrics in fish ecology. One or more weekend field trips may be required. Students will be charged for travel and costs associated with the course. Limited enrolment. NOTE: Credit can only be obtained for one of BIOL 4746 or BIOL 4981.