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Articles by Josh Korman
NRS Partners with NationsBenefits to Enable 'One Tap' OTC Flex Card Acceptance for Independent Retailers Nationwide
NRS Partners with NationsBenefits to Enable 'One Tap' OTC Flex Card Acceptance for Independent Retailers Nationwide National Retail Solutions (NRS) merchants can now accept NationsBenefits OTC Flex Cards with a single tap, driving traffic to independent stores. This integration drives foot traffic by making our merchants' stores a go-to destination for health plan members.” — Elie Y. Katz, President and CEO of NRS.
A literature review and hypsometric analysis to support decisions on trout management flows on the Colorado River downstream from Glen Canyon Dam
First posted August 7, 2024 Fish stranding has been studied in select rivers worldwide, often with the purpose of determining how to mitigate adverse effects of dam operations on highly valued salmon and trout populations. However, where a reduction in trout population size is desired by resource managers, as is the case downstream of the Glen Canyon Dam on the Colorado River, flow manipulations termed trout management flows (TMFs) may be used to optimize fish stranding and mortality.
Declines in prey production during the collapse of a tailwater Rainbow Trout population are associated with changing reservoir conditions
INTRODUCTION Availability and acquisition of limiting resources is central to our understanding of ecological processes that regulate fish populations, particularly when it comes to the production of energy, the requisite for growth (Arrington et al. 2002). Discerning how energy moves through food webs and limits productivity at various trophic levels is difficult and has been addressed with different, but potentially complementary, approaches (e.g., Cross et al. 2013).
As the prey thickens: rainbow trout select prey based upon width not length
Authors: Michael J. Dodrill* mdodrill@usgs.gov, Charles B. Yackulic, Theodore A. Kennedy, Michael D. Yard, and Josh Korman Canadian Journal of Fisheries and Aquatic Sciences e-First Abstract Résumé References Supplementary Material Abstract Drift-feeding fish are typically considered size-selective predators. Yet, few studies have explicitly tested which aspect of prey “size” best explains size selection by drift-foraging fish.
Effects of environmental covariates and density on the catchability of fish populations and interpretation of catch per unit effort trends
Effects of environmental covariates and density on the catchability of fish populations and interpretation of catch per unit effort trends Fisheries Research By: Josh Korman and Mike Yard Links Abstract Article for outlet: Fisheries Research. Abstract: Quantifying temporal and spatial trends in abundance or relative abundance is required to evaluate effects of harvest and changes in habitat for exploited and endangered fish populations.
Trends in Rainbow Trout recruitment, abundance, survival, and growth during a boom-and-bust cycle in a tailwater fishery
Trends in Rainbow Trout recruitment, abundance, survival, and growth during a boom-and-bust cycle in a tailwater fishery Transactions of the American Fisheries Society By: Josh Korman, Micheal D. Yard, and Theodore A. Kennedy Links Abstract Data from a large-scale mark-recapture study was used in an open population model to determine the cause for long-term trends in growth and abundance of a Rainbow Trout Oncorhynchus mykiss population in the tailwater of Glen Canyon Dam, AZ.
Incorporating temporal heterogeneity in environmental conditions into a somatic growth model
Evaluating environmental effects on fish growth can be challenging because environmental conditions may vary at relatively fine temporal scales compared to sampling occasions. Here we develop a Bayesian state-space growth model to evaluate effects of monthly environmental data on growth of fish that are observed less frequently (e.g., from mark-recapture data where time between captures can range from months to years).
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