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008250320e197904##bcca    obs  f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|apn-----
045 |ax5x7
0861 |aFs97-4/1511E-PDF|zFs97-4/1511
1001 |aKetchen, K. S., |eauthor.
24513|aAn overview of the Strait of Georgia winter trawl fishery, 1951-52 to 1977-78 / |cby K.S. Ketchen.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Fisheries and Marine Service, Resource Services Branch, Pacific Biological Station, |cApril 1979.
264 4|c©1979
300 |a1 online resource (iv, 63 pages) : |billustrations.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aFisheries and Marine Service manuscript report, |y0701-7618 ; |v1511
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 17-19).
5203 |a"Statistics of catch and effort for a 27-yr period have been examined to identify trends in landings and relative abundance of groundfish, with special reference to foodfish species consisting primarily of Pacific cod. A downward trend in fishing effort occurred throughout the study period, whereas catch and CPUE declined only until about 1968-69 after which there was a sharp reversal of trend. CPUE in the mid-1970's was as high or higher than that in the early 1950's, but it is uncertain whether the same can be said for relative abundance because efficiency of the unit of effort may have increased. An indicator of profitability shows a downward trend through most of the study period. It is hypothesized that relatively high effort in early years led to overfishing; that after a certain point in the decline of fishing effort, foodfish stocks began to rebuild; and that continued low profitability discouraged a resurgence of effort at least until 1977-78"--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|aTrawls and trawling|xCatch effort|zGeorgia, Strait of (B.C. and Wash.)|vStatistics.
650 6|aChalutage|zGéorgie, Détroit de (C.-B. et Wash.)|vStatistiques.
650 6|aChalutage|xEffort de pêche|zGéorgie, Détroit de (C.-B. et Wash.)|vStatistiques.
655 7|aStatistics|2lcgft
655 7|aStatistiques|2rvmgf
7101 |aCanada. |bFisheries and Marine Service, |eissuing body.
7102 |aPacific Biological Station (1972- ), |eissuing body.
830#0|aManuscript report (Canada. Fisheries and Marine Service)|v1511.|w(CaOODSP)9.924185
85640|qPDF|s1.76 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1511-eng.pdf