![]() Recent changes to the Canadian Fisheries Act switched the focus of promoting sustainable fisheries in Canada from an approach of managing the habitats sustaining fish populations, to one that manages the ongoing productivity of fishes related to commercial, recreational, or aboriginal (CRA) fisheries. Review topic identification and stakeholder input To this end, the rigorous methodology employed by systematic reviews and related meta-analyses make them a valuable tool in making informed fisheries management decisions. Effective management requires the identification and reconciliation of trade-offs between biodiversity or fisheries productivity and human uses in freshwater systems, to provide transparent, defensible evidence-based decisions. Biodiversity conservation is frequently at odds with other ecosystem services required and anthropogenic uses of freshwater, leading to conflicting management priorities. Īmong the primary threats to freshwater ecosystems and the fish populations they support is the degradation and destruction of habitat through anthropogenic activities. Yet, freshwater ecosystems are among the most globally imperilled, and threats to freshwater habitat and biodiversity have been thoroughly documented. Habitat quantity and quality are essential for fish productivity, and there is a positive relationship between biodiversity, healthy ecosystems and the provisioning of services. Fish species of value to subsistence, commercial or recreational fisheries cannot exist in isolation, but rather are part of a complex ecosystem of interconnected habitats and species. ![]() Conversely, inland fisheries in developed nations tend more toward recreational and commercial fisheries, each presenting their own management challenges. These fisheries are particularly important in developing nations, where subsistence fishing provides an essential source of nutrition for millions of impoverished people. įreshwater fisheries are globally important ecosystem services providing commerce, recreation, and a low-cost dietary protein source to millions of people. Human activities as well depend on the services provided by healthy freshwater ecosystems: fresh water, waste treatment, transportation, flood control, tourism, recreation, cultural benefits, and food resources in the form of fisheries. Freshwater ecosystems are rich in biodiversity, and support approximately 12% of the world’s known species, which includes roughly a third of the world’s vertebrate taxa. Globally, freshwater is a limited resource, comprising only a fraction (< 0.01%) of the volume of the world’s surface water, and covering only 0.8% of the Earth. Data will be presented as a narrative synthesis, and if sufficient good quality data are available, a meta-analysis will be performed.įreshwater ecosystems are essential to life, and are thus critical for the development and maintenance of human societies. Study validity will be critically assessed to identify any risk of bias. Both peer reviewed primary and grey literature will be included in the review, and searches will be conducted in academic journal databases, online search engines, and specialist websites. All studies in freshwater habitats in temperate regions in both the Northern and Southern hemispheres will be considered. This systematic review will examine, summarize and synthesize all available evidence on the impacts of small-scale dredging activities on surrogate indicators of fisheries productivity. This systematic review will explore the evidence base for small-scale dredging impacts on the indicators of fisheries productivity, and will help to inform management decisions that seek to reconcile biodiversity conservation and freshwater fisheries, with potentially disruptive anthropogenic activities in freshwater environments. Small-scale dredging activities in freshwater bodies have the potential to impact habitats and food resources that fishes depend on, and ultimately impact fisheries productivity.
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