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008250409t19931993bccab   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|apn-----
045 |ax5x9
0861 |aFs97-6/1913E-PDF|zFs97-6/1913E
1001 |aSchweigert, J. F., |eauthor.
24510|aStock assessment for British Columbia herring in 1992 and forecasts of the potential catch in 1993 / |cby J.F. Schweigert, V. Haist, and C. Fort.
264 1|aNanaimo, British Columbia : |bBiological Sciences Branch, Department of Fisheries and Oceans, Pacific Biological Station, |c1993.
264 4|c©1993
300 |a1 online resource (viii, 111 pages) : |billustrations, map.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian technical report of fisheries and aquatic sciences, |x0706-6457 ; |v1913
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 63-65).
5203 |a"Herring stock abundance in British Columbia waters was assessed for 1992 and forecasts were made for 1993 using two analytical methods: (1) escapement model; and (2) age-structured model. Coastwide, the estimated spawning stock biomass for all assessment regions is 220,000 tonnes, a 45% increase from 1991 abundance levels. This is the result of a strong 1989 year class recruiting in the Strait of Georgia, Central Coast and Prince Rupert District. Forecasts of the pre-fishery spawning stock biomass in 1992 are obtained by weighting the estimates from the two models. Stock forecasts for the northern stock assessment regions are 154,250 and 128-550 tonnes for the southern regions assuming average recruitment to all areas. The recommended 1993 catch (20% of the 1993 forecast herring run) is 56,560 tonnes for the entire B.C. coast. Although stock levels in the Queen Charlotte Islands and west coast of Vancouver Island have declined recently there is no evidence that these stocks should not be harvested in 1993"--Abstract, page vii.
546 |aIncludes abstracts in English and French.
650 0|aPacific herring|zBritish Columbia|zPacific Coast.
650 0|aPacific herring fisheries|zBritish Columbia|zPacific Coast.
650 0|aFish stock assessment|zBritish Columbia|zPacific Coast.
650 6|aHareng du Pacifique|zColombie-Britannique|zPacifique, Côte du.
650 6|aHareng du Pacifique|xPêche commerciale|zColombie-Britannique|zPacifique, Côte du.
650 6|aRessources halieutiques|xÉvaluation|zColombie-Britannique|zPacifique, Côte du.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aPacific Biological Station (1972- ), |eissuing body.
830#0|aCanadian technical report of fisheries and aquatic sciences ;|v1913.|w(CaOODSP)9.504449
85640|qPDF|s2.23 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1913-eng.pdf