Spatial and temporal variation in efficiency of the Moore egg collector

Thomas A. Worthington; Shannon K. Brewer; Nicole Farless

doi:10.1080/02755947.2013.824939

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Spatial and temporal variation in efficiency of the Moore egg collector

Thomas A. Worthington·Shannon K. Brewer·Nicole Farless

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Abstract

The Moore egg collector (MEC) was developed for quantitative and nondestructive capture of semibuoyant fish eggs. Previous studies have indicated that capture efficiency of the MEC was low and the use of one device did not adequately represent the spatial distribution within the water column of egg surrogates (gellan beads) of pelagic broadcast-spawning cyprinids. The objective of this study was to assess whether use of multiple MECs showed differences in spatial and temporal distribution of bead catches. Capture efficiency of three MECs was tested at four 500-m sites on the South Canadian River, a Great Plains river in Oklahoma. For each trial, approximately 100,000 beads were released and mean capture efficiency was 0.47–2.16%. Kolmogorov–Smirnov tests indicated the spatial distributions of bead catches were different among multiple MECs at three of four sites. Temporal variability in timing of peak catches of gellan beads was also evident between MECs. We concluded that the use of multiple MECs is necessary to properly sample eggs of pelagic broadcast-spawning cyprinids.

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North American Journal of Fisheries Management Article

Source-reported bounding extent: 34.90507921085795° to 36.060201412392914° latitude; -99.02286529541016° to -96.96189880371094° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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BibTeX RIS

Thomas A. Worthington, Shannon K. Brewer, Nicole Farless. 2013-10-16. Spatial and temporal variation in efficiency of the Moore egg collector. https://doi.org/10.1080/02755947.2013.824939

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