Linked Data Explorer
A comparison of stratified systematic and stratified random methods of estimating catch rates, by depth interval, for biomass estimation of Pacific ocean perch (Sebastes alutus) in Goose Island Gully, Queen Charlotte Sound, British Columbia
Biomass surveys, using on-bottom trawl gear, for Pacific ocean perch (Sebastes alutus) in Goose Island Gully began in 1967, and eleven have been completed through 1995. The stratified systematic method was utilized for all cruises until 1995, when a stratified random method was introduced. The question arises as to the advantage, if any, of either method for estimating catch rates by depth interval. The purpose of this report was to compare sampling intensity, catch rates, and mean catches for the two methods, within the study area, defined by the trawl locations in the 1976 survey. Additional comparisons dealt with north-south orientation of hauls and order of trawling.--Document.
- "Biomass surveys, using on-bottom trawl gear, for Pacific ocean perch (Sebastes alutus) in Goose Island Gully began in 1967, and eleven have been completed through 1995. The stratified systematic method was utilized for all cruises until 1995, when a stratified random method was introduced. The question arises as to the advantage, if any, of either method for estimating catch rates by depth interval. The purpose of this report was to compare sampling intensity, catch rates, and mean catches for the two methods, within the study area, defined by the trawl locations in the 1976 survey. Additional comparisons dealt with north-south orientation of hauls and order of trawling.--Document."@en
- "A comparison of stratified systematic and stratified random methods of estimating catch rates, by depth interval, for biomass estimation of Pacific ocean perch (Sebastes alutus) in Goose Island Gully, Queen Charlotte Sound, British Columbia"@en