The primary determinant of fish population size accessible for fisheries is the survival beyond the egg and larval stages. To estimate the number of fish available for harvest therefore, modelers must be able to accurately predict the percent of fish that survive these early life stages. Many species, such as walleye, must reside in nursery areas to survive the larval stage and current flow is a major factor determining their retention in these areas.
In many actively managed forest ecosystems, the most disturbed locations are the areas where excess woody slash has been piled and burned. Burning slash creates barren patches, which may provide locations for the invasion of exotic plant species. The intern will study the restoration of native species to these sites where slash piles have been recently burned, with the intent of preventing the entry of exotic invasive species into the area or, if invasive species are already present, preventing their further spread.
The intern will collaborate with MGS Horticultural, a major supplier of fertilizer and pest management controls, to study the relationship between scent and pollination success in commercial greenhouses. Previous (unpublished) research has suggested that scent is an integral component of pollination in greenhouse tomato, and that scent can be affected by growth conditions within a greenhouse. The research proposed will attempt to not only confirm this, but use it in developing a course of action for tomato crops which are experiencing a deficit of pollination.
The goal of this project is to develop a method of estimating optimum stocking strategies in mixed species lakes in collaboration with the Freshwater Fisheries Society of BC, a non-profit organization which works in partnership with the provincial government to deliver the fish stocking program as well as providing conservation fish culture services. The growth and survival of stocked fish will be estimated across a range of initial sizes, trout densities and competitor fish densities.
Streams become contaminated with pesticides through runoff, groundwater contamination and aerial deposition. Previously, a research team had determined that aquatic insects are negatively affected by insecticides at concentrations that are detected in streams in Atlantic Canada. These concentrations were so low that they were not thought to cause effects. It was found that mayflies were smaller, less fit and always female when exposed to insecticides in artificial streams. In some cases, we saw these effects even at the lowest concentrations (0.1 parts per billion).
The project will utilize basic research to understand the target and time of action of the organic materials which will be used to guide the implementation and management plan for a new blossom thinner. The intern will test the efficacy of twenty candidate organic materials to act as blossom thinners and develop a management plan for the application of the materials with respect to timing and concentration at which they should be employed.
Salt marshes are recognized as significant feeding grounds and refuges for wildlife and for their importance in flood mitigation, carbon sequestration and as filters for removing pollutants and suspended sediments. With growing interest in, and efforts towards, dyke removal and salt marsh restoration, there is a need for science-based management decisions to ensure appropriate site-specific restoration activities.
This study will gather baseline information on limiting nutrients, current productivity levels and food web structure in two study systems within Fundy National Park as well as other comparative sites within the province, with the intention of applying this knowledge in a follow up study wherein nutrients are added to the stream. This, in turn, will show that fish productivity (i.e.
The intern will assist the Greater Moncton Sewerage Commission (GMSC) in the development and production of biologically-safe composts from biosolids by providing novel technologies to assess its biosafety. To achieve this, the intern will develop molecular tools, based on the real-time polymerase chain reaction (PCR) technology, to allow quick, accurate and reliable detection of human microbial pathogens directly from compost using specific DNA primers.
While the collapse of Atlantic cod is the most well-known and studied, other less studied species, such as redfish Sebastes spp., have experienced comparable declines. These declines have resulted in the closure of the Gulf of St. Lawrence, northern and eastern Grand Bank and Labrador Shelf redfish fisheries since the mid-1990s, while reduced quotas are in place for the Laurentian Channel. While some redfish stocks declined, other stocks with more southern ranges remained stable or showed increased biomass. These dynamics and their potential causes have not been rigorously investigated.