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Folders: ROOT > ScienceBase Catalog > National and Regional Climate Adaptation Science Centers > National CASC > FY 2016 Projects > Safe Operating Space for Walleye: Understanding the Conditions Needed to Sustain Recreational Fisheries in a Changing World ( Show direct descendants )

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_____Safe Operating Space for Walleye: Understanding the Conditions Needed to Sustain Recreational Fisheries in a Changing World
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Abstract (from http://www.tandfonline.com/doi/full/10.1080/02755947.2016.1146179): Over the last decade, the abundance of Largemouth Bass Micropterus salmoideshas increased in many northern Wisconsin lakes, causing concern among anglers and biologists regarding the potential for Largemouth Bass to negatively affect populations of Walleye Sander vitreus through predation or competition for prey. Our objectives were to determine whether (1) diet overlap and predation occurred between adult Walleyes and Largemouth Bass in four northern Wisconsin lakes and (2) the use of DNA barcoding to reduce unidentifiable fish in diet samples affected conclusions regarding diet overlap. A single occurrence of Walleye predation was...
Abstract (from http://onlinelibrary.wiley.com/doi/10.1111/faf.12230/abstract): The Safe Operating Space (SOS) of a recreational fishery is the multidimensional region defined by levels of harvest, angler effort, habitat, predation and other factors in which the fishery is sustainable into the future. SOS boundaries exhibit trade-offs such that decreases in harvest can compensate to some degree for losses of habitat, increases in predation and increasing value of fishing time to anglers. Conversely, high levels of harvest can be sustained if habitat is intact, predation is low, and value of fishing effort is moderate. The SOS approach recognizes limits in several dimensions: at overly high levels of harvest, habitat...