000 03304nam  2200409zi 4500
0019.895621
003CaOODSP
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006m     o  d f      
007cr bn|||||||||
008210125s1987    nscbd   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-nf
0861 |aFs70-8/87-11E-PDF
1001 |aBaird, J. W., |eauthor.
24510|aExamination of temporal and spatial variability of length compositions for the 1983 Division 3L cod trap fishery with reference to resulting age composition estimation / |cby J.W. Baird and S.C. Stevenson and S. Gavaris.
264 1|a[Dartmouth, N.S.] : |bCanadian Atlantic Fisheries Scientific Advisory Committee ; |aSt. John's, Newfoundland : |bScience Branch, Department of Fisheries and Oceans ; |aSt. Andrews, New Brunswick : |bBiological Station, Department of Fisheries and Oceans, |c[1987?]
300 |a1 online resource (16 pages) : |bmaps, graphs.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCAFSAC research document ; |vno. 87/11
500 |aCover title.
500 |a"Not to be cited without permission of the authors."
504 |aIncludes bibliographical references (pages 6-7).
5203 |a"A study was conducted during the 1983 Newfoundland cod trap fishery in NAFO Div. 3L to examine the temporal and spatial variability amongst commercial length frequency samples and to determine the impact of any differences on age composition estimation. Likelihood ratio statistics were used to evaluate the relative contributions of time and location to the overall variation. The analysis showed that both month and unit area contributed significantly to the variability in length compositions, with unit area explaining considerably more variation than month. This suggests that length frequencies should be weighted by unit area landings rather than just by monthly landings as is presently the case. In terms of age composition estimation, differences of up to 25% for some ages occurred depending on whether frequencies were weighted by month, unit area or both month and unit area. Considering these differences, researchers should consider spatial as well as temporal variability when using commercial sampling data from this fishery to estimate removals at age"--Abstract, page 2.
546 |aIncludes abstract and series statement in French.
650 0|aAtlantic cod fisheries|zNewfoundland and Labrador.
650 0|aFish stock assessment|zNewfoundland and Labrador.
650 6|aMorue|xPêche commerciale|zTerre-Neuve-et-Labrador.
650 6|aRessources halieutiques|xÉvaluation|zTerre-Neuve-et-Labrador.
7102 |aCanadian Atlantic Fisheries Scientific Advisory Committee, |eissuing body.
7101 |aCanada. |bDepartment of Fisheries and Oceans. |bScience, |eissuing body.
7101 |aCanada. |bDepartment of Fisheries and Oceans. |bBiological Station (St. Andrews, N.B.), |eissuing body.
830#0|aCAFSAC research document (Canadian Atlantic Fisheries Scientific Advisory Committee)|vno. 87/11.|w(CaOODSP)9.869616
85640|qPDF|s896 KB|uhttps://publications.gc.ca/collections/collection_2021/mpo-dfo/fs70-8/Fs70-8-87-11-eng.pdf