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fish Archive

K. Dodd: dynamics of Port Madison fish


Data from N end of Bainbridge and repeat trawl survey from Tom Quinn’s UW class (~20 trawls/year from 1991-2008, over 2nd weeend in May, 4 depths (10-70m)).  Time series started just after 1989 fish closure, so expected increase in catch rate over time, but that wasn’t the case. Catch anomaly shows an actual catch that [...]

Alejandro Frid: rockfish & predation risk theory


Vancouver Aquarium Marine Science Center Focusing on quillback rockfish and interactions with one of their prey, 3 genera of demersal shrimp which show strong spatial association.  An example from 8 reefs in Howe Sound and adjacent Georgia Strait, depths 14-25m, daytime, 10 Jul – 18 Nov, 2008 Lingcod are the main predator of quillback rockfish.  [...]

Eric Eisenhardt: Efficacy of bottomfish recovery zones


We have a great op in the San Juan Islands to compare marine reserves set up in ~1990 (mandatory) with bottomfish recovery zones (BRZ) were established ~7 years later (voluntary).  Overall, regulations have changed over time, essentially getting more restrictive. Methods: 300 dives since 1997; transects to compare recovery zones with paired (nearby) reserve lingcod [...]

Anne Beaudreau on lingcod in the San Juan Islands


What are the interacting relationships between rockfish, the lingcod that eat them, and the fishers who take lingcod (and rockfish)?  In reserves we can look at predatory role of lingcod without fishing pressure.  We can also look at differences in lingcod population structure and feeding between non/reserves. Most samples from central San Juan Channel in [...]

Northern resident bounty this year?


This just in from salmonuniversity.com: Forecasts are great for the Queen Charlotte’s and the Nushagak in 2009 Canadian Fisheries claims the water temperature is the coldest in 11 years and the ocean conditions are perfect for setting up huge runs of returning Chinook and Coho for 2009.  In 2005 the Nushagak had over 300k returning [...]

More dams coming to British Columbia rivers?


First I’ve heard of this, but the idea of damming the Hamathko seems sacrilegious.  The heads of those distant inlets and fjords are deep wilderness in my mind, gateways to the fantastic icefields of Mount Waddington and beyond. Is there really a need for hydropower up there?! I assert that solar, tidal, and/or wind turbines [...]

A step towards ecosystem-based management?


Long Live the Kings announced in Dec 2008 an effort to implement internal changes at WDFW to manage salmon in an “All-H” framework — one that integrates decisions about Hatcheries, Harvest, and Habitat. Perhaps this is a step towards the “Ecosystem Based Management” which no one can define for me, but is already a buzz [...]

$37.5M to help feed southern residents


It will be fascinating to see how this money is actually spent. The article mentions using part of the $30M to retire licenses from commercial troll fishers. I’m guessing the $15M ($7.5M from Canada and the same from the U.S.) will be helping to replenish the PSC portfolio. This could mean renewed funding in 2010 [...]

Ocean conditions promising future orca food


Some good news re offshore productivity in 2008, though the southern residents may not see the benefits for a couple years… clipped from www.oregonlive.com Oregon ocean conditions best for fish in 50 years After several years of poor ocean conditions that left birds starving and fish dwindling, this year brought a healthy influx of cold, [...]

No mention of orcas in Columbia salmon injunction email


The appended email from the “Columbia and Snake River Campaigns” provides a helpful synopsis (despite the awful typos) of recent legal activity regarding the management of salmon in the river system.  I find it noteworthy that the supporting quotes (and the email overall) make no mention of killer whales and their need for Columbia/Snake salmon.  [...]