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040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|apn-----
045 |ax8x8
0861 |aFs97-4/1940E-PDF|zFs97-4/1940E
1001 |aMcCarter, P. B., |eauthor.
24510|aHydroacoustic herring survey results and trawl catches from Hecate Strait, November 26 to December 12, 1985, G.B. Reed cruise GBR85E and M.V. Sunnfjord cruise SUN85-1 / |cby P.B. McCarter, R. Kieser, D.E. Hay, and D.C. Miller.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, |cMay 1987.
264 4|c©1987
300 |a1 online resource (iv, 131 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. 1940
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 6-7).
5203 |a"Northern coastal waters where herring overwinter off Porcher Island and SE Moresby Island were surveyed hydroacoustically to estimate herring abundance and distribution patterns. Total midwater biomass estimates for herring were 32,000 tonnes on the northern mainland side of Hecate Strait and 9,500 tonnes off SE Moresby Island. Repeated hydroacoustic soundings over a 24-h period showed that vertical and perhaps shoreward movements of herring during dark hours resulted in lower estimates as fish moved out of the echo integration zone. During daylight hours, herring located near or on very irregular sea bottom could not be acoustically estimated because of bottom echo interference. Vessel avoidance, species compositions of trawl and bongo net catches, stomach contents and size and age distributions of herring were also examined. Oceanographic data were collected at eight hydrographic and plankton stations"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aPacific herring|zBritish Columbia|zHecate Strait.
650 0|aFish populations|xEstimates|zBritish Columbia|zHecate Strait.
650 0|aFish surveys|zBritish Columbia|zHecate Strait.
650 6|aHareng du Pacifique|zColombie-Britannique|zHécate, Détroit d'.
650 6|aPoissons|xPopulations|xEstimation|zColombie-Britannique|zHécate, Détroit d'.
650 6|aInventaires ichtyologiques|zColombie-Britannique|zHécate, Détroit d'.
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. 1940.|w(CaOODSP)9.505211
85640|qPDF|s3.38 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1940-eng.pdf