WorldCat Identities

Westrheim, S. J.

Overview
Works: 105 works in 299 publications in 1 language and 1,283 library holdings
Genres: Bibliography 
Roles: Author
Classifications: SH223, 597.09263
Publication Timeline
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Most widely held works by S. J Westrheim
Species synopses : life histories of selected fish and shellfish of the northeast Pacific and Bering Sea( Book )

2 editions published in 1988 in English and held by 52 WorldCat member libraries worldwide

This collection of seven papers covers the life histories of northern pink shrimp, Pacific sand lance, Pacific herring, walleye pollock, market squid and Pacific halibut in the Gulf of Alaska, the North Pacific and the Bering Sea, including literature surveys and bibliographies
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 by S. J Westrheim( Book )

3 editions published in 2007 in English and held by 42 WorldCat member 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
Final results of the September 1979 Dover sole tagging experiment in northern Hecate Strait, 1979-1999 by J Fargo( Book )

3 editions published in 2007 in English and held by 41 WorldCat member 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
Bathymetric relationships of principal groundfish shelf cohabitants off West Vancouver Island and in Queen Charlotte Sound, based on demersal-trawl landing records by S. J Westrheim( Book )

2 editions published in 2005 in English and held by 40 WorldCat member libraries worldwide

This report examines the bathymetric relationships of lingcod (Ophiodon elongatus), Pacific cod (Gadus macrocephalus), and rock sole (Lepidopsetta bilineata), based on investigation of data for 1960-95 from the British Columbia groundfish trawl fishery in Queen Charlotte Sound and the west coast of Vancouver Island. The analysis was initially based on five-fathom depth intervals which were selected on the basis of the quantity & consistency of the landings of the principal species. Conventional statistical tests are used to explore the significance of mean-depth differences among species and for individual species among multiple-species combinations
Bathymetric distributions of Pacific ocean perch (Sebastes alutus) off British Columbia by S. J Westrheim( Book )

2 editions published in 2006 in English and held by 36 WorldCat member libraries worldwide

G.B. Reed groundfish cruise no. 83-5, September 20-October 6, 1983 by S. J Westrheim( Book )

5 editions published in 1984 in English and held by 34 WorldCat member libraries worldwide

During September-October, the R/V G.B. REED completed an echo-sounder survey in Queen Charlotte Sound and a trawl survey in Hecate Strait. The echo-sounder survey delineated "trawlable" and "untrawlable" bottom on Goose Island Bank. The trawl survey investigated the distribution and abundance of juvenile Pacific cod (Gadus macrocephalus). Hydrographic stations were occupied in Queen Charlotte Sound and Hecate Strait. Surficial sediments were sampled on Horseshoe and Dundas grounds in Hecate Strait. Technological studies on arrowtooth flounder (Atheresthes stomias) were completed. Most of Goose Island Bank was deemed "untrawlable". Abundance (or availablity) of juvenile Pacific cod was low. Water temperatures from surface to bottom were abnormal
G̲. B̲. R̲e̲e̲d̲ groundfish cruise no. 74-3, June 4-26, 1974 (data record) by Canada( Book )

5 editions published in 1974 in English and held by 31 WorldCat member libraries worldwide

Age composition of Chinook Salmon in the commercial gillnet, and test fisheries of the Lower Fraser, 1958-1988 by S. J Westrheim( Book )

4 editions published in 1998 in English and held by 31 WorldCat member libraries worldwide

G.B. Reed groundfish cruise no. 79-6, September 6-21, 1979 by Canada( Book )

2 editions published in 1979 in English and held by 29 WorldCat member libraries worldwide

Primary purpose of the cruise was to investigate the distribution and abundance of Pacific cod (Gadus macrocephalus) in Hecate Strait. Secondary purposes were to collect hydrographic data in Queen Charlotte Sound and Hecate Strait, and sample surficial sediments in Hecate Strait. Pacific cod catch rates were 18-684 kg/hr at 32-89 fm. Few adult cod were caught, presumably because relatively warm water dispersed them to deeper cooler depths. Stomach contents were recorded for 103 Pacific cod. Principal surficial sediments, collected in Hecate Strait were sand at 10-70 fm and mud at depths deeper than 70 fm
Length-weight and length-girth relationships for Pacific ocean perch (S̲e̲b̲a̲s̲t̲e̲s̲ a̲l̲u̲t̲u̲s̲) collected off southeastern Alaska in August 1971 by S. J Westrheim( Book )

8 editions published in 1971 in English and held by 28 WorldCat member libraries worldwide

G.B. Reed groundfish cruise No. 79-4, June 26-July 13, 1979( Book )

1 edition published in 1979 in English and held by 28 WorldCat member libraries worldwide

Pacific cod were caught by on-bottom trawl over a depth range of 10-79 fm in Hecate Strait and Dixon Entrance during early summer, 1979. Mean catch rates per 10-fm depth interval were usually less than 500 kg/hr. Juveniles (mostly age 1+) predominated in the catches. Abnormally warm on-bottom temperatures were thought to have caused the low abundance of adult cod on the grounds trawled
G.B. Reed groundfish cruise no. 73-1, June 5-July 26, 1973 by Fisheries Research Board of Canada( Book )

8 editions published between 1973 and 1974 in English and held by 26 WorldCat member libraries worldwide

Age-length relationships for 26 scorpaenids in the northeast Pacific Ocean by S. J Westrheim( Book )

4 editions published in 1975 in English and held by 26 WorldCat member libraries worldwide

On the Pacific cod (Gadus macrocephalus) in British Columbia waters, and a comparison with Pacific cod elsewhere, and Atlantic cod (G. morhua) by S. J Westrheim( Book )

13 editions published in 1996 in English and held by 25 WorldCat member libraries worldwide

This report, based on a literature survey, provides an overview of the available information on Pacific cod in the waters off British Columbia with comparisons to Atlantic cod and to Greenland cod (Gadus ogac). Sections of the report cover the following topics: cod nomenclature, physical morphology, and genetics; geographic and bathymetric distribution; cod biology, including size and age composition, growth, reproduction, life history, diet, and predators; fisheries (Native, commercial, recreational); stock assessment; and abundance prediction. Comparisons with Greenland cod are limited to nomenclature and distribution due to the limited available information on the species and its minor commercial importance
G.B. Reed groundfish cruise reports, 1963-66 by S. J Westrheim( Book )

7 editions published between 1967 and 2015 in English and held by 22 WorldCat member libraries worldwide

Partial bibliography of Pacific cod (gadus macrophalus) in the North Pacific ocean, through December 1985 by S. J Westrheim( Book )

10 editions published between 1986 and 1987 in English and held by 15 WorldCat member libraries worldwide

The bibliography lists published reports through December 1985, including relevant M. Sc. and Ph. D. theses, on Pacific cod (Gadus macrocephalus) in the north Pacific Ocean
Assessment of groundfish stocks off the West Coast of Canada in 1979 and recommended total allowable catches for 1980 by Canada( Book )

4 editions published in 1980 in English and held by 7 WorldCat member libraries worldwide

G.B. Reed groundfish cruise reports : 1963-1966 by S. J Westrheim( )

1 edition published in 1967 in English and held by 0 WorldCat member libraries worldwide

 
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Alternative Names
Westrheim, Sigurd J.

Languages
English (96)