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ROOT _ScienceBase Catalog __LC MAP - Landscape Conservation Management and Analysis Portal ___Great Plains Landscape Conservation Cooperative ____Projects _____FY 2011 Science Research Projects ______Evaluating the reproductive success of Arkansas River shiner by evaluating early life-history stage dispersal and survival at a landscape level Filters
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Habitat fragmentation and flow regulation are significant factors related to the decline and extinction of freshwater biota. Pelagic-broadcast spawning cyprinids require moving water and some length of unfragmented stream to complete their life cycle. However, it is unknown how discharge and habitat features interact at multiple spatial scales to alter the transport of semi-buoyant fish eggs. Our objective was to assess the relationship between downstream drift of semi-buoyant egg surrogates (gellan beads) and discharge and habitat complexity. We quantified transport time of a known quantity of beads using 2–3 sampling devices at each of seven locations on the North Canadian and Canadian rivers. Transport time was...
Summary of project, results, and discussion for the study completed by Shannon K. Brewer, Thomas A. Worthington, Timothy B. Grabowski, Julia Mueller, Nicole Farless, and Mark S. Gregory. Summary written by the Great Plains Landscape Conservation Cooperative (GP LCC).
Categories: Data;
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OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: CATFISHES/MINNOWS,
Federal resource managers,
Final Report,
Final Report,
GPLCC,
Quantitative studies focusing on the collection of semibuoyant fish eggs, which are associated with a pelagic broadcast-spawning reproductive strategy, are often conducted to evaluate reproductive success. Many of the fishes in this reproductive guild have suffered significant reductions in range and abundance. However, the efficiency of the sampling gear used to evaluate reproduction is often unknown and renders interpretation of the data from these studies difficult. Our objective was to assess the efficiency of a modified Moore egg collector (MEC) using field and laboratory trials. Gear efficiency was assessed by releasing a known quantity of gellan beads with a specific gravity similar to that of eggs from representatives...
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Tags: Academics & scientific researchers,
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GPLCC,
GPLCC,
Several final products have been submitted to U.S. Fish and Wildlife Service in addition to this final report: the Master’s thesis (Mueller 2013) “Effects of temperature, salinity, and suspended solids on the early life history stages of Arkansas River shiner”; and the publication “Sampling efficiency of the Moore egg collector” (available at DOI:10.1080/02755947.2012.741557) by Worthington et al. (2013). These products present completed results for portions of the two major objectives and will not be repeated here. Results from the remaining portions are presented in this report: 1) determine the landscape-level effects on the probability of Arkansas River shiner presence, and 2) assess egg transport related to...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: CATFISHES/MINNOWS,
Federal resource managers,
Final Report,
Final Report,
GPLCC,
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