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045 |ax4x7
0861 |aFs97-4/1563E-PDF|zFs97-4/1563
1001 |aWestrheim, S. J., |eauthor.
24514|aThe trawl fishery in the Strait of Georgia and vicinity, 1945-77 / |cby S.J. Westrheim.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, |cMarch 1980.
264 4|c©1980
300 |a1 online resource (iv, 130 pages) : |billustrations, maps.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian manuscript report of fisheries and aquatic sciences, |y0706-6473 ; |vno. 1563
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 24-26).
5203 |a"The 1945-77 trawl fishery in Georgia Strait and vicinity (Area 4B) was reviewed with respect to landing statistics, current regulations, and stock assessment of important species in Regulated Areas. All-species landings exhibited no trend during 1961-77, while fishing effort declined. Landings-per-hour-trawled (LPUE) increased after 1970, but remained substantially smaller than LPUEs from offshore grounds. Effects, if any, of the mesh regulation imposed in 1962 were obscured by the declining fishing effort and the declining landings of species which would allegedly benefit. Pacific cod (Gadus macrocephalus) is the single most important species (>50% of annual landings), and overall abundance exhibited no overall trend. Among areas, contrasting trends counterbalanced one another. English sole (Parophrys vetulus) abundance declined after the mid-1960s, even in areas where severe regulations were in effect since 1947. Lingcod (Ophiodon elongatus) abundance also declined substantially, based on landings of line-caught fish. Trawl landings exhibited no trend, but were a negligible portion of total lingcod landings"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aTrawls and trawling|zGeorgia, Strait of (B.C. and Wash.)|vStatistics.
650 0|aFishery law and legislation|zGeorgia, Strait of (B.C. and Wash.)
650 0|aFish stock assessment|zGeorgia, Strait of (B.C. and Wash.)
650 6|aChalutage|zGéorgie, Détroit de (C.-B. et Wash.)|vStatistiques.
650 6|aPêches|xDroit|zGéorgie, Détroit de (C.-B. et Wash.)
650 6|aRessources halieutiques|xÉvaluation|zGéorgie, Détroit de (C.-B. et Wash.)
655 7|aStatistics|2lcgft
655 7|aStatistiques|2rvmgf
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aPacific Biological Station (1972- ), |eissuing body.
830#0|aCanadian manuscript report of fisheries and aquatic sciences ;|vno. 1563.|w(CaOODSP)9.505211
85640|qPDF|s4.95 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1563-eng.pdf