Evaluating Two Observational Sampling Techniques for Determining the Distribution and Detection Probability of Age-0 Smallmouth Bass in Clear, Warmwater Streams

摘要: Abstract Accurate determination of the distribution and abundance age-0 sport fish, such as smallmouth bass Micropterus dolomieu, is an important aspect successful species management (e.g., characterizing nursery habitats for protection or enhancement; identifying reproductive dynamics influences environmental variables). Two observational techniques—snorkeling above-water (AW) observation—were evaluated in several Missouri Ozark streams to determine (1) accuracy with each technique, (2) detection probabilities under a variety channel unit (CU) conditions (i.e., discrete morphological features riffles pools) relations between probability hydraulic variables, (3) behavioral responses (fright response, return no response) fish observers using technique. Identification was over 90% accurate when AW observation shallow water snorkeling deep wat...