Bottom trawl survey for rockfish in Queen Charlotte Sound, September 11 to 22, 1995 / by K.L. Yamanaka, L.J. Richards and G.D. Workman. : Fs97-4/2362E-PDF

"A bottom trawl survey for rockfish was conducted by the fishing vessels OCEAN SELECTOR and FROSTI, in Goose Island Gully, Queen Charlotte Sound, from September 11 to 22, 1995. Objectives of the survey were to compare catch rates between the two vessels and to estimate the relative biomass of the Pacific ocean perch stock in Goose Island Gully. Biomass estimates were also compared for the F/V OCEAN SELECTOR between 1994 and 1995, and over the series of surveys between 1965 and 1995. In addition, biological information was collected for Pacific ocean perch (Sebastes alutus), yellowmouth rockfish (S. reedi), redstripe rockfish (S. proriger), and shortspine thomyhead (Sebastolobus alascanus) caught during the surveys. There were no differences in the catch rates between the F/V OCEAN SELECTOR and the F/V FROSTI. Relative biomass estimates were 26,634 tonnes (CV 16%) and 25,041 tonnes (CV 13%) for the F/V OCEAN SELECTOR and F/V FROSTI, respectively. Although the point biomass estimate for the 1995 survey by the F/V OCEAN SELECTOR was higher than for the 1994 survey (16,583 tonnes; CV 10%), the increase was not statistically significant. Other differences between the 1994 and 1995 surveys included survey design and timing and the use of a cod end net liner in 1995"--Abstract, page iii.

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