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Mysis relicta can be observed on echograms as a sound scattering layer when they migrate into the water column at night to feed on zooplankton. However, quantitative measures of mysid abundance with hydroacoustics requires knowledge of mysid target strength (TS), a method of removing fish echoes...
Coastal inputs of nutrients and contaminants impact phytoplankton community composition and health in localized and large areas of coastal Lake Ontario. Advanced fluorimetric instrumentation (Fast Repetition Rate Fluorimeter FRRF, FluoroProbe) was used during June 2006 to assess the in situ...
The assessment and appraisal of river habitat quality for purposes of legislative compliance requires a sound understanding of the interactions between the hydrogeomorphological and ecological components of the instream environment. Reconciliation of complementary habitat concepts developed from...
The invasive New Zealand mud snail, Potamopyrgus antipodarum , is a world-wide invasive species currently found in Europe, Australia, Japan, and, most recently, North America. It was first discovered in Lake Ontario in 1991. The purposes of this study were to update the current known geographic...
Secchi depth, total phosphorus, soluble reactive phosphorus, silica, chlorophyll a , and zooplankton (density, biomass, and average size) were sampled as part of a lake-wide, seasonal (spring, summer, and fall) assessment of Lake Ontario in 2003 to characterize the status of the lower aquatic...
Todos os Santos Bay, having an area of approximately 927 km 2 , is the largest Bay on the Brazilian coast. Four sampling surveys, in two rainy and two dry periods, were made at five locations of Todos os Santos Bay, Bahia, Brazil, aiming to identify environmental and ecotoxicological correlates...
From the early 1980s to the late 1990s, a succession of non-native invertebrates colonized Lake Ontario and the suite of consequences caused by their colonization became known as “food web disruption”. For example, the native burrowing amphipod Diporeia spp., a key link in the profundal food...
We reviewed responses associated with the invasion of dreissenid mussels by two eastern Lake Ontario fish populations and the fisheries they support. Resurging lake whitefish and walleye populations declined following dreissenid mussel invasion in the early 1990s. Impacts on whitefish were...
A Before-After, Control-Impact sampling design was used to measure changes in fish assemblages in intertidal mangroves and saltmarsh prior to and following the closure of commercial fishing in the Botany Bay estuary, New South Wales, Australia. Of commercial species found as juveniles in the...
Intertidal mudflats in Bahrain provide essential feeding grounds for a good number of shorebirds. The spatial distribution of soft-sediment macrobenthic invertebrate assemblages inhabiting a mudflat designated as a natural marine protected area was investigated to characterize shorebird food...
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