Fisheries and Oceans Canada

Acoustic telemetry is a widely used method in assaying behavioural dynamics in fishes. Telemetry tags are often surgically implanted in the coelom of the animal and are assumed to have minimal rates of post-release mortality and tag shedding. However, fish are capable expelling tags and...

Estuaries are highly productive and diverse ecosystems that represent a geographic bottleneck between marine and freshwater systems. Estuaries have been identified as ecologically and biologically significant areas (EBSAs) in Canada’s Pacific Region because of their importance for the...

We have updated and reviewed toxicity data for Emamectin benzoate (EMB) and Ivermectin (IVER), two in-feed drugs used to treat sea lice in farmed Atlantic salmon, and inferred new Environmental Quality Standards (EQS) using a deterministic approach or Species Sensitivity Distributions (SSDs)...

The endangered St. Lawrence Estuary (SLE) beluga population is in decline and has shown no signs of recovery despite multiple protection measures. Changes in prey availability and exposure to organohalogen contaminants have been proposed as potential factors limiting the its recovery. Studies on...

Graphic illustrations of the major ecosystems in the Pacific region, including details on the main ecological components, key ecological interactions, environmental drivers, and relevant human activities. Ecosystems range from the intertidal to the deep sea and include: High and low energy rocky...

The data in the files of this dataset represent the raw and standardized information of the distribution of the number of prey in stomachs of larval fish, the increments widths derived from larval fish, and the mortality rates, that were included in the study by Pepin (2024) into the probability...

This dataset is a compilation of algae and substrate observations that have been collected on DFO dive surveys between 1996 and 2021. Sources of this data include Marine Invertebrate Section/Shellfish Data Unit biological survey databases held for targeted species observations of green sea...

We assembled productivity (i.e. recruits per spawner) estimates for British Columbian Sockeye, Pink, and Chum Salmon. Annual estimates, by brood year, of spawner numbers, catch, and population and age composition were obtained from regional experts and organized in a simple database. Time series...

Recruitment overfishing in the Spot Prawn (Pandalus platyceros) trap fishery in British Columbia on the west coast of Canada is managed using a fixed escapement system. Fixed escapement targets in the fishery are set and implemented as the number of female spawners caught per trap in the...

The data for this study are from a sub-Arctic coastal ecosystem (1000 km2) in the northwest Atlantic. The aim of the collection was to characterize the prey of the larvae of important fish species that occur in Conception Bay, Newfoundland. Plankton was sampled fortnightly from late May until...

Microsatelite frequencies by stock for several pacific marine species of fish.

Created in 2005, Science Advisory Reports include traditional Stock Status Reports, Ecosystem Status Reports, and Habitat Status Reports. Moreover, management strategies, frameworks and guidelines on the assessment or evaluation on specific issues, impacts of human activities on ecosystem...

The Atmospheric Forcing Index (AFI) utilizes standardized scores of the first component from a principal components analysis on the Aleutian Low Pressure Index (ALPI), Pacific Interdecadal Oscillation Index, and the northwesterly atmospheric circulation anomalies for the North Pacific (December...

Data from drifters with deep drogues collected by the Institut für Meereskunde, at the University of Kiel from 1980 to 1996.

This series reports on human activities that may impact aquatic ecosystems or components of those ecosystems, including the nature of the activities, their extent, their interactions with ecosystem components, and interactions with other human activities on the same areas. Generally, the effects...

List of Publications from the Pacific Biological Station and related staff (not including (IOS)).

The mean discharge (m3 s-1) of the Fraser River measured at Hope station. Presented as the mean discharge for an annual year (January through December) and for a flow year (April present year through March next year)....

The Ecosystem Status Report series reports on overviews of the status of ecosystems, oceanographic conditions, biological communities, and other integrative evaluations of status of areas, from local to very large spatial scales. Prior to 2003, the standard oceanographic conditions reports were...

This series documents the responses provided by DFO Science for issues handled via the Science Response Processes (SRPs). The SRPs are generally used when Science has to respond to urgent and unforeseen requests for scientific information / advice or to respond to a request for which advisory...

This series documents the scientific basis for the evaluation of fisheries resources in Canada. As such, it addresses the issues of the day - in the time frames required for management - by providing progress reports on ongoing investigations. The research documents use scientific and technical...