Site Map
(1) Main Menu and What's New ?
Table of contents, starting point for searches and recent updates.
(2) Search the BC map (Region -> Statistical
area -> Section -> location)
Maps and graphs that summarize herring spawning distributions, updated annually
(Source: DFO herring spawn database 1928+).
(3) Cumulative spawn maps (Bubble plot maps)
-> BC Overview Maps
Maps of herring spawn summed from 1928 to the current year, updated annually (Source: DFO herring spawn database 1928+).
(4) Time-series maps (Moving, bubble plot maps) ->
How to display
BC overview maps that summarize herring catch distributions in relation to
herring spawning areas, updated annually (Source: DFO catch databases 1888+).
(5) Composite spawn maps (Overlaid polygons)
-> Background Information
-> Digitized shape files
Arcview digitized maps of several thousand herring
spawning beds surveyed from 1930 to 2002. Overlaid polygons of
spawning beds and separately digitized shape files for each year (Source: DFO herring archives).
(6) Statistical tables
(Year-by-year trends) -> How to select
Statistical tables of herring spawn data (1940+) and catch data (1888+)
pooled at four geographical scales and cross-referenced with
weighted mean, same day, surface seawater temperature (SST) measurements from nearest lighthouse stations (Source: DFO herring
Access databases and DFO oceanographic data).
(7) Stock assessments
(Spawn and catch trends) -> Herring spawn figures
Line graphs showing trends in the abundance of herring spawners (t) and catches (t) over a 70-year time series at four geographical scales (entire BC coast,
six regions, 29
statistical areas and 101 herring sections).
(8) Where did tagged
herring go ? (Tag recovery maps) -> Map symbols
Maps showing herring tag and recovery sites with straight line connectors.
(9) Where did tagged
herring come from ? (Tag origin maps) -> Migrations
Maps showing all herring tag release locations (from 1936 to 1991) for each respective recovery region,
recovery statistical area and recovery location.
(10) Age-compositions and spawn timing plots
(Life history graphs)
Age-compositions graphs in video format of five stock assessment
regions (1972+). Seasonal, spawn timing plots for each region and 101 herring
sections over a 64 year period (Source: DFO herring bio-sampling and spawn databases).
(11) Ichthyoplankton surveys (Larval
fish
dispersal maps)
Larval rearing areas of Pacific herring and other captured fish larvae (Source: DFO icthyoplankton database 1985+).
(12) Related publications (and additional web links)
Several on-line publications explaining methods, analyses and results (CSA research documents, DFO technical and manuscript reports).
CSA = Centre for Science Advice - Pacific Region
DFO = Fisheries and Oceans Canada
E-mail a link of this web site to a colleague.
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