Site Archives lingcod

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.  Estimated biomass [...]

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 length: bigger [...]

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 rocky [...]