WorldCat Identities

Westrheim, S. J.

Overview
Works: 165 works in 241 publications in 2 languages and 929 library holdings
Classifications: sh223, 639.208
Publication Timeline
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Publications about  S. J Westrheim Publications about S. J Westrheim
Publications by  S. J Westrheim Publications by S. J Westrheim
Most widely held works by S. J Westrheim
by ( Book )
3 editions published in in English and held by 39 libraries worldwide
During September 21-26, 1979, 5146 Dover sole were tagged and released at two locations in Area 5D (Figure 1). Recovery results through 1984 were published in Fargo et al. (1985). We analyzed the final recovery information for the tagging through 1999. Time at liberty was 20 years for the last recovery, and 15 recoveries were at liberty at least 10 years. During 1979-99 recovery rates were not significantly different for the two tagging grounds. Incidence of recovered tags (nos/100t) was substantially larger in Area 5D than in Area 5E. Recovery rates generally varied directly with length at tagging. The sex ratio was similar for tagged fish recovered from the commercial fishery in the two Areas, but not so in samples taken from commercial landings. There was a differential bathymetric migration of the sexes, also demonstrated in earlier studies in U.S. waters. Namely, female Dover sole tagged in "shallow" water in Hecate Strait migrated during winter into "deep" water off the west coast of the Queen Charlotte Islands for spawning. The migration of males to deepwater spawning areas preceded that of females.
by ( Book )
2 editions published in in English and held by 37 libraries worldwide
by ( Book )
2 editions published in in English and held by 21 libraries worldwide
by ( Book )
3 editions published in in English and held by 19 libraries worldwide
by ( Book )
3 editions published in in English and held by 19 libraries worldwide
by ( Book )
2 editions published in in English and held by 19 libraries worldwide
by ( Book )
7 editions published between and 1988 in English and held by 18 libraries worldwide
"Parabranchial 'growths' were first described in 1929 as adenocarcinomas (W. Pacific) and adenomas (E. Atlantic). The cancerous 'tumor' diagnosis was finally abandoned for parasite-caused X-cell lesions in 1981"--Abstract.
by ( Book )
2 editions published in in English and held by 17 libraries worldwide
by ( Book )
1 edition published in in English and held by 17 libraries worldwide
by ( Book )
3 editions published in in English and held by 16 libraries worldwide
by ( Book )
2 editions published in in English and held by 12 libraries worldwide
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.
 
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Audience level: 0.78 (from 0.71 for Parabranch ... to 0.85 for Species sy ...)
Alternative Names
Westrheim, Sigurd J.
Languages
English (240)
Undetermined (1)