SPLASH (Structure of Populations, Levels of Abundance and Status of Humpbacks) represents one of the largest international collaborative studies of any whale population ever conducted. It was designed to determine the abundance, trends, movements, and population structure of humpback whales throughout the North Pacific and to examine human impacts on this population. This study involved over 50 research groups and more than 400 researchers in 10 countries. It was supported by a number of agencies and organizations including the National Marine Fisheries Service, the National Marine Sanctuary Program, National Fish and Wildlife Foundation, Pacific Life Foundation, Department of Fisheries and Oceans Canada, and Commission for Environmental Cooperation with additional support from a number of other organizations and governments for effort in specific regions. Results presented here include a comprehensive analysis of individual identification photographs. Additional analysis of human impacts, ecosystem markers (e.g., stable isotopes) and the genetic structure of populations are underway or planned pending further funding.
The dataset contains river current measurements by an Acoustic Scintillation Flowmeter (ASFM) at one level (1991 and 1993) or two levels (1995, 1996, 1997 and 1998) below lowest normal tide. The receiving system was located next to the Annacis Island dock for the large car freighters, and the transmitting system was at the South Surrey docks approximately 500 metres away. The measurement levels were fixed, and so the depth below the river surface varied with the state of the tide. When opertional, currents were measured approximately every 2.5 minutes. The currents reprent a true average of the current across the 500m path. The data file does not necessarily contain full months of data and some months of data may be missing. Some down time occurred due to some operational problems such as site damaged by ships or log booms. There was also be interference from passing ships. If a measurement exists, the accuracy is essentially perfect. Due to the cross-correlation measurement technique, there is normally a dropout near zero flow.
The Station Hydrologic Model Output page provides access to simulated streamflow data for locations throughout British Columbia, Canada. The streamflow data were simulated using the Variable Infiltration Capacity (VIC) model (Liang et al. 1994, 1996). The simulations are generated by forcing the VIC model using statistically downscaled global climate model (GCM) projections from the Coupled Model Intercomparison Project Phase 3 (CMIP3; Meehl et al. 2007) driven by a range of future emission specified by three separate scenarios (A1B, A2 and B1) from the IPCC Special Report on Emissions Scenarios (SRES; Nakicenovic et al. 2000). Also included is historical data generated by running the VIC model with interpolated observed climate data. The simulated data includes daily streamflow time series for over 120 sites located in the Peace, upper Columbia, Fraser and Campbell River watersheds. The streamflow sites correspond to Water Survey of Canada gauge locations and BC Hydro project sites. The simulated data represents naturalized flow conditions (i.e. with effects of upstream regulation removed) for those sites affected by storage regulation. The hydrologic projections were forced with GCM data downscaled to a 1/16-degree resolution using Bias-Correction Spatial Disaggregation (BCSD) (Wood et al. 2004) following Werner (2011). Application of the VIC model and the generation of hydrologic projections for the Peace, Fraser, upper Columbia and Campbell River watersheds are described in Shrestha et al. (2012) and Schnorbus et al. (2011, 2014).
The PSC is an international decision-making organization, composed of four Commissioners (and four alternates) from the United States and Canada. This body handles ongoing administration of the Pacific Salmon Treaty through advice from four regional Panels of fisheries experts. More specifically, the Fraser River Panel has special responsibility for in-season regulation of Fraser River-origin sockeye and pink salmon fisheries in southern British Columbia and northern Puget Sound. In-season meetings of the Fraser River Panel typically occur every Tuesday and Friday each week during the period of active fishery management, and occasionally on other days as needed. Following these meetings, the Fraser River Panel and Commission Secretariat staff issue regular news announcements and information updates throughout the fishing season.
Time series of electronic ctd data (pressure, temperature, salinity, chlorophyll fluorescence) moored beneath 50m sediment traps at two sites in the Strait of Georgia. Empty rows indicate gaps due to instrument failure.
Aspects of biology of Lycodopsis pacifica were investigated during December 1965-November 1966 in outer Burrard Inlet, British Columbia. Trawls were used as sampling devices. After approximately age III, males appeared to have a different growth pattern than females. Females apparently had higher mortality rates than males. Spawning occured from late August to January. Most males were mature at a length of 170mm, and most females at 160mm. The complements of mature eggs were small (average approx 30). The mature eggs are large, with an average diameter of 5.0mm. There is some evidence that parental care is involved in reproduction behaviour. The species fed primarily on molluscs, annelids, and Crustacea in the bottom mud
Areal extents of Eelgrass Inhabited areas.
Information on fish habitat in th-e lower Fraser River and estuary downstream from Agassiz is presented with emphasis on geophysical factors that may be affecting fish ecology. The application to fisheries management is considered. The lower Fraser River and estuary provides habitat to support over 50 species of fish. Brief synopses are given of the ecology of commercially and ecologically significant fish. Fish communities in Boundary Bay and on Roberts Bank tend to be dominated by species adapted to marine conditions. Some brackish-water species are found in the salt wedge and on Sturgeon Bank. Our knowledge of fish ecology in the lower Fraser River and estuary is based on a patchwork of studies. To enable good management of this world-class estuary into the twenty-first century, it is prudent for stakeholders to foster ongoing programs of integrated fisheries ecosystem research in this area.
Results from surveys of juvenile chinook (Oncorhynchus tshawytscha) and their invertebrate food items in the North Arm of the Fraser River estuary are presented and related to habitat zones on narrow beaches. Fish catches were highest on unvegetated habitat in the low tide area. The weight of food items in stomachs was highest from fish in the mid intertidal area. The distribution and abundance of ten common prey used by chinook were also examined. Emergent vegetation (sedges (Carex lyngbyei), rushes (Scirpus spp., Typha spp.)) and riparian shrubs and trees in the middle and upper intertidal zones, respectively, were identified as vital components providing detritus and habitat for the chinook food organisms. Water volume over the unvegetated sand and mud flats in the low intertidal zone needs to carefully managed in this part of the estuary where extensive dyking and filling has been conducted in the past. For the purposes of managing fish habitat to achieve a goal of no net loss of habitat in the Fraser estuary, biologists are assigning highest values to the sedges and rushes. Our data support this as an interim measure, but further research is needed to investigate the importance of riparian vegetation as its significance may be underestimated.
A large fraction of the zooplankton data collected during the past 50 years from the Strait of Georgia has been compiled and archived. The full dataset is very heterogeneous and gappy. This dataset includes deep tows at mid-Strait deep-water locations, where vertical migratory zooplankton can be captured at all times of day and all seasons. Much of the biomass in all seasons consists of large crustaceans (copepods, euphausiids and amphipods with oceanic and subarctic zoogeographic affinities) that undergo strong diurnal or seasonal vertical migrations. Their interannual variability is very strong: about an order of magnitude within most zooplankton categories, and nearly two orders of magnitude for euphausiids, large copepods, and chaetognaths.