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008250410t19921991bccab   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|apn-----
045 |ax9x9
0861 |aFs97-6/1864E-PDF|zFs97-6/1864E
1001 |aBourne, N. |q(Neil), |d1929- |eauthor.
24510|aIntertidal clam survey of the north coast area of British Columbia - 1990 / |cby N. Bourne and G. Cawdell.
264 1|aNanaimo, British Columbia : |bBiological Sciences Branch, Department of Fisheries and Oceans, Pacific Biological station, |c1992.
264 4|c©1991
300 |a1 online resource (xi, 151 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 ; |v1864
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 30-31).
5203 |a"Results of a 1990 survey to assess populations of commercially important intertidal clams on selected beaches in the north coast area of British Columbia and to determine the northward distribution of manila clams, Tapes philippinarum, are presented. Butter clams, Saxidomus giganteus, were widely distributed on beaches throughout the sampling area. Densities as high as 440 butter clams m⁻² were observed. In general there was a wide distribution of size and age classes that indicated recruitment has been consistent in recent years. Littleneck clams, Protothaca staminea, were the most common clam sampled during the survey, densities as high as 504 littleneck clams m⁻² were observed. There was a wide distribution of size and age classes in most areas indicating consistent recruitment. Manila clams were found as far north as Hird Point in Mathieson Channel, latitude 52° 34' N. The Seaforth Channel-Mathieson Channel area appears to be a biological barrier preventing further northward dispersal of this species in British Columbia. This is probably due to cold water temperatures that prevent successful breeding. Manila clams were abundant on many beaches in the Bella Bella area (DFO statistical area 7), densities as high as 350 manila clams m⁻² were recorded. There was a preponderance of older, larger clams on many beaches. Size and age frequency distribution showed that recruitment may be sporadic in some areas. The potential for commercial exploitation of these three species in north coast area is discussed along with suggestions for future studies"--Abstract, page x.
546 |aIncludes abstracts in English and French.
650 0|aSaxidomus giganteus|zBritish Columbia|zPacific Coast.
650 0|aPacific littleneck|zBritish Columbia|zPacific Coast.
650 0|aManila clam|zBritish Columbia|zPacific Coast.
650 0|aClam populations|zBritish Columbia|zPacific Coast.
650 0|aInvertebrate surveys|zBritish Columbia|zPacific Coast.
650 6|aPalourde jaune|zColombie-Britannique|zPacifique, Côte du.
650 6|aPalourde du Pacifique|zColombie-Britannique|zPacifique, Côte du.
650 6|aPalourde japonaise|zColombie-Britannique|zPacifique, Côte du.
650 6|aMyes|xPopulations|zColombie-Britannique|zPacifique, Côte du.
650 6|aInvertébrés|xInventaires|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 ;|v1864.|w(CaOODSP)9.504449
85640|qPDF|s1.73 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1864-eng.pdf