For this project, we propose to integrate the data about Fraser River salmon populations into a multi-species, multi-population database, and develop an interactive data visualization tool that allows fisheries scientists and managers to explore this data at different spatial and temporal scales. The objective of this project is to provide fisheries scientists and managers with the tools to easily and comprehensively track annual trends in salmon data, and explore these trends for their possible drivers.
Mysis diluviana, a shrimp-like crustacean, is an invasive species in Okanagan Lake. As part of a strategy by the BC government to reduce the impact of this species on the natural lake ecosystem, Piscine Energetics Inc. has been harvesting Mysis from Okanagan Lake since 2000 and retails the harvested Mysis as fish food to the ornamental aquarium industry. There are indications that Mysis could also be an effective source of nutrition for rearing trout and salmon in hatcheries.
In 2015, Canada exported $6 billion in fish and seafood. Fishing is important not only economically, but also socially, and environmentally. In order to have seafood now and into the future, sustainable development of the fisheries is important. One way to make sure that fishing is being done in this way, is to recognize and reward harvesters for sustainable fishing practices using recommendation lists, eco-labels, and traceability systems. This research will study local management and governance decisions that led to changes for sustainable development in Newfoundland fisheries.
The aim of this project is to determine which families are resistant to bacterial kidney disease, a bacterial infection that affects both wild and farmed Atlantic salmon. To do this many families of Atlantic salmon from a commercial aquaculture company are to be purposefully infected with the bacteria that causes the disease to establish which families have a high rate of survival and which have a low rate of survival.
I propose a multi-species fish population monitoring project in Quebecâs largest lake (Mistassini), to facilitate community-based fisheries management. Mistassini is home to recreational fisheries for walleye, lake trout, brook trout and pike. With a 31% increase in the regional human population since 2001 and increasing fishing pressure, effective monitoring of Mistassiniâs harvested fish populations is essential.
A parasite present in the Bras dâOrs Lake in Cape Breton, NS has closed the oyster aquaculture and wild fishery in Cape Breton since the initial outbreak in 2002. This parasite has also affected oysters in the Eastern US. The industry in the US has survived and is stable in part due to the production of triploid oysters. Triploid oysters grow to market size faster and this fast growth rate reduces the time the oyster spends in the wild and therefore reduces the timeframe that the oyster may become infected with the parasite.
Recirculating aquaculture systems (RAS) are land based fish farms that recycle the water from the fish tanks using multiple water treatment processes. Fish produce large amounts of carbon dioxide, through respiration, that needs to be removed during the water treatment process since high levels of carbon dioxide are hazardous to fish. Currently the most common method of removing carbon dioxide from recirculating water is with degassing towers. Moving bed biofilters and sidewall-box airlift pumps could also be used as a method of carbon dioxide control.
To achieve the goal of commercializing striped bass aquaculture in Nova Scotia, the obstacle of high (up to 100%) overwinter mortality among young-of-year fish needs to be overcome. Mortality is restricted to fish that are under one year old (underyearlings, 500g) suffer negligible mortality. Potential factors for such low survival rates identified through four years of trials by researchers from Dalhousie include low oxygen levels and exhaustion of lipid energy reserves.
Re-establishing salmonid populations to areas historically occupied has substantial potential for conservation gains, however, such interventions also risk negatively impacting native resident stocks. An on-going reintroduction of anadromous sockeye salmon (Oncorhynchus nerka) to Skaha Lake, British Columbia is succeeding, with large numbers returning to spawn. However, a recent genetic study detected strong evidence of hybridization and introgression with native kokanee (freshwater obligate form of O.
On the coast of British Columbia, both eelgrass meadows and Pacific salmon species are declining, yet eelgrass community dynamics and reliance of juvenile salmon on these communities are poorly understood. We will assemble the first large-scale dataset from monitoring efforts of coastal BC organizations in order to assess eelgrass community diversity and structure across environmental and human disturbance gradients (including boating, fishing, and non-native species).