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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 Filters
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Abstract (from Fisheries Management and Ecology): Lake ecosystems are shifting due to many drivers including climate change and landscape-scale habitat disturbance, diminishing their potential to support some fisheries. Walleye Sander vitreus (Mitchill) populations, which support recreational and tribal fisheries across North America, have declined in some lakes. Climate change, harvest, invasive species and concurrent increases in warm-water fishes (e.g. Centrarchidae) may have contributed to declines. To test the utility of an intensive management action to resist walleye loss, an experimental removal of ~285,000 centrarchids from a 33-ha lake over 4 years was conducted while monitoring the fish community response....
Categories: Publication;
Types: Citation
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...
Categories: Publication;
Types: Citation;
Tags: Competition,
Fish,
Fish,
National CASC,
Wildlife and Plants
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...
Categories: Publication;
Types: Citation;
Tags: Data Visualization & Tools,
Fish,
National CASC,
Rivers, Streams and Lakes,
Science Tools For Managers,
Global change, including large scale changes in climate, land use, hydrology, and biogeochemistry, creates unprecedented pressure on inland recreational fisheries. Local fishery managers have little influence on these large-scale changes, but they can manipulate factors such as harvest, food web structure, and some features of habitat. The Safe Operating Space (SOS) concept establishes a framework for analyzing a fishery in the context of both large-scale and local factors. Adaptation is the manipulation of local factors (such as harvest, food web structure, or habitat) to maintain the SOS of a fishery as the climate changes. At the scale of many lakes on a landscape, the SOS can be used to identify lakes that are...
Categories: Publication;
Types: Citation
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