00000000nam 2200000zi 4500
0019.950406
003CaOODSP
00520250528081805
006m     o  d f      
007cr mn|||||||||
008250424e198202##bccab   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|apn-----
045 |ax8x8
0861 |aFs97-4/1638E-PDF|zFs97-4/1638
1001 |aHaegele, C. W., |eauthor.
24510|aDiving survey assessment of 1981 herring spawn in British Columbia / |cby C.W. Haegele.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, |cFebruary 1982.
264 4|c©1982
300 |a1 online resource (iv, 39 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. 1638
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 9-10).
5203 |a"Diving surveys were made for 172 km of herring spawn in 1981. There was complete diving survey coverage for the North Coast Division, nearly complete coverage for the Strait of Georgia Division, and partial coverage for the Queen Charlotte Islands, Central Coast, and West Coast of Vancouver Island divisions. Diving survey data was supplemented by Fishery Officer collected spawn survey data to produce final egg estimates for the 20 sections for which there was complete or partial diving survey coverage. Approximately 60% of the spawn produced by the 1981 spawning population was estimated in this manner. Fishery Officers generally underestimated the area of spawns, which resulted in underestimates of egg deposition. The distribution of eggs by substrate type was documented and regional differences in substrate utilization were found. The relationship of length of spawn to egg abundance was examined and 200 billion eggs per km of spawn were found to occur on gradually sloping beaches. On beaches of moderate to steep slope, 9.8 to 119.1 billion eggs per km of spawn were found"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aPacific herring|xEggs|zBritish Columbia|zPacific Coast.
650 0|aPacific herring|xSpawning|zBritish Columbia|zPacific Coast.
650 6|aHareng du Pacifique|xŒufs|zColombie-Britannique|zPacifique, Côte du.
650 6|aHareng du Pacifique|xFrai|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. 1638.|w(CaOODSP)9.505211
85640|qPDF|s1.01 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1638-eng.pdf