00000000cam 2200000zi 4500
0019.958028
003CaOODSP
00520251205150441
006m     o  d f      
007cr mn|||||||||
008251205t19931993bccab   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|apn-----
045 |ax9x9
0861 |aFs97-4/2185E-PDF|zFs97-4/2185E
1001 |aKieser, R., |eauthor.
24510|aExperimental hydroacoustic estimation of rockfish (Sebastes spp.) biomass off Vancouver Island, November 13-25, 1991 / |cby R. Kieser, K. Cooke, R.D. Stanley, and G.E. Gillespie.
264 1|aNanaimo, B.C. : |bBiological Science Branch, Department of Fisheries and Oceans, Pacific Biological Station, |c1993.
264 4|c©1993
300 |a1 online resource (iv, 40 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. 2185
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 8-9).
5203 |a"The precision of acoustic biomass estimates of rockfish (Sebastes spp.) was examined on the continental shelf off Nootka Sound, British Columbia. We assessed the differences between day and night biomass estimates from areas of about 250, 110, and 30 km² and examined the variability among estimates from several passes on two tracklines. School structure, distribution, and behaviour of S. flavidus was examined acoustically. The species distribution was restricted bathymetrically and its areal extent was governed by bottom slope and topographic features. Diurnal distributions were characterized by dense, vertically stacked schools. Nocturnal distributions showed much more diffuse aggregations, both near bottom and in the midwater. Transitional behaviour occurred very rapidly at twilight. The normal pattern was one of dispersal of diurnal schools in both horizontal and vertical directions at dusk and the subsequent regrouping of nocturnal aggregations at dawn, nearer the bottom"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aSebastes populations|zBritish Columbia|zPacific Coast.
650 0|aFish populations|xEstimates|zBritish Columbia|zPacific Coast.
650 0|aFish surveys|zBritish Columbia|zPacific Coast.
650 6|aSébastes|xPopulations|zColombie-Britannique|zPacifique, Côte du.
650 6|aPoissons|xPopulations|xEstimation|zColombie-Britannique|zPacifique, Côte du.
650 6|aInventaires ichtyologiques|zColombie-Britannique|zPacifique, Côte du.
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. 2185.|w(CaOODSP)9.505211
85640|qPDF|s885 KB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-2185-eng.pdf