00000000nam 2200000zi 4500
0019.949235
003CaOODSP
00520250425100245
006m     o  d f      
007cr mn|||||||||
008250318e198411##bccab   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|an-us-wa|apn-----
045 |ax8x8
0861 |aFs97-6/1333E-PDF|zFs97-6/1333E
1001 |aTaylor, F. H. C. |q(Frederick Henry Carlyle), |d1919- |eauthor.
24510|aDistribution and abundance of herring and other pelagic fish off the west coast of Vancouver Island in September, 1981 / |cby F.H.C. Taylor.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, |cNovember 1984.
264 4|c©1984
300 |a1 online resource (v, 43 pages) : |billustrations, maps.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian technical report of fisheries and aquatic sciences, |x0706-6457 ; |vno. 1333
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 16-17).
5203 |a"A hydroacoustic and fishing survey was carried out in September, 1981, to determine the distribution and abundance of herring off the west coast of Vancouver Island from the Juan de Fuca Trench to the Ucluth Peninsula. The major herring concentration lay along the outer edge of the continental shelf extending inshore to the Finger Bank and Southeast Corner. There were estimated to be 61,700 t in this region and on Swiftsure Bank. The largest concentration lay between Nitinat and Barkley Canyons. Only about 11% of the herring occurred south of the U.S.-Canada fishing boundary, compared to 46% in September, 1980. No schools of herring were found beyond the edge of the continental shelf. Hydroacoustic estimates in both September, 1980, and 1981 compared well with estimates derived from catch, spawn and sampling data, considering those stocks spawning on the west coast from Clayoquot Sound south and in the Strait of Georgia south of Nanaimo. In 1980-81, the catch and spawn estimate was 78,666 t, the hydroacoustic estimate 78,220 t; in 1981-82, the estimates were 67,423 t and 61,700 t, respectively. Factors affecting the reliability of hydroacoustic estimates were discussed. The major causes of bias were considered to be the estimation of target strength and the determination of the species composition of the major fish concentrations. In September, 1981, 39,600 t of hake, 13,200 t of pollock, 21,800 t of dogfish, 9,870 t of yellowtail rockfish and 8,390 t of redstripe rockfish were located. Corresponding estimates for September, 1980, were 67,230 t of hake, 31,880 t of pollock, 10,120 t of dogfish, 4,645 t of yellowtail rockfish and 3,030 t of redstripe rockfish. Differences in times of migration between the 2 years may explain the biomass differences"--Abstract, page iv.
546 |aIncludes abstracts in English and French.
650 0|aPacific herring|zBritish Columbia|zPacific Coast|xGeographical distribution.
650 0|aPacific herring|zWashington (State)|zPacific Coast|xGeographical distribution.
650 0|aPelagic fishes|zBritish Columbia|zPacific Coast|xGeographical distribution.
650 0|aPelagic fishes|zWashington (State)|zPacific Coast|xGeographical distribution.
650 0|aFish populations|xEstimates|zBritish Columbia|zPacific Coast.
650 0|aFish populations|xEstimates|zWashington (State)|zPacific Coast.
650 0|aFish surveys|zBritish Columbia|zPacific Coast.
650 0|aFish surveys|zWashington (State)|zPacific Coast.
650 6|aHareng du Pacifique|zColombie-Britannique|zPacifique, Côte du|xDistribution géographique.
650 6|aHareng du Pacifique|zWashington (État)|zPacifique, Côte du|xDistribution géographique.
650 6|aPoissons pélagiques|zColombie-Britannique|zPacifique, Côte du|xDistribution géographique.
650 6|aPoissons pélagiques|zWashington (État)|zPacifique, Côte du|xDistribution géographique.
650 6|aPoissons|xPopulations|xEstimation|zColombie-Britannique|zPacifique, Côte du.
650 6|aPoissons|xPopulations|xEstimation|zWashington (État)|zPacifique, Côte du.
650 6|aInventaires ichtyologiques|zColombie-Britannique|zPacifique, Côte du.
650 6|aInventaires ichtyologiques|zWashington (État)|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 ;|vno. 1333.|w(CaOODSP)9.504449
85640|qPDF|s1.15 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1333-eng.pdf