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043 |an-cn-bc|apn-----
045 |ax8x8
0861 |aFs97-4/1715E-PDF|zFs97-4/1715
1001 |aKieser, R., |eauthor.
24510|aHydroacoustic biomass estimates of bathypelagic groundfish in Georgia Strait, January, February, and April, 1981 / |cby R. Kieser.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, |cAugust 1983.
264 4|c©1983
300 |a1 online resource (iv, 84 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. 1715
500 |aErrata sheet inserted.
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 10-11).
5203 |a"Hydroacoustic echo integration surveys were carried out in the Strait of Georgie to determine the absolute abundance and distribution of Pacific hake (Merluccius productus) and walleye pollock (Theragra chalcogramma). The prespawning and spawning periods of the target species were covered by the cruises in January, February, and April 1981. Total biomass was estimated as 67, 88, and 112 kt for the three months, respectively. Pacific hake accounted for 73, 86, and 71% of the estimates. Hake, pollock, and dogfish (Squalus acanthias) accounted for almost the entire catches that were made for species identification. The echogram and catches indicated two distinct midwater layers during all surveys. In April, a dense plankton layer was present in the shallow layer"--Abstract, page iv.
546 |aIncludes abstracts in English and French.
650 0|aPacific hake|zGeorgia, Strait of (B.C. and Wash.)
650 0|aWalleye pollock|zGeorgia, Strait of (B.C. and Wash.)
650 0|aSpiny dogfish|zGeorgia, Strait of (B.C. and Wash.)
650 0|aFish populations|xEstimates|zGeorgia, Strait of (B.C. and Wash.)
650 0|aFish surveys|zGeorgia, Strait of (B.C. and Wash.)
650 6|aMerlu du Pacifique|zGéorgie, Détroit de (C.-B. et Wash.)
650 6|aGoberge de l'Alaska|zGéorgie, Détroit de (C.-B. et Wash.)
650 6|aAiguillat commun|zGéorgie, Détroit de (C.-B. et Wash.)
650 6|aPoissons|xPopulations|xEstimation|zGéorgie, Détroit de (C.-B. et Wash.)
650 6|aInventaires ichtyologiques|zGéorgie, Détroit de (C.-B. et Wash.)
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. 1715.|w(CaOODSP)9.505211
85640|qPDF|s2.36 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1715-eng.pdf