000	02172nam  2200325za 4500
001	9.805253
003	CaOODSP
005	20221107135615
007	cr |||||||||||
008	150406s1999    oncdb   ob   f000 0 eng d
040	|aCaOODSP|beng
041	|aeng|bfre
043	|an-cn---
086	1 |aFs70-1/1999-115E-PDF
100	1 |aChen, Yong,|d1963-
245	10|aDeveloping an overall indicator for monitoring temporal variation in fish size at age and its application to cod (Gadus morhua) in the northwest Atlantic, NAFO subdivision 3Ps |h[electronic resource] / |cYong Chen and Luiz G. S. Mello.
260	|aOttawa : |bFisheries and Oceans Canada, |c1999.
300	|a16 p. : |bfig., graphs, maps, tables.
490	1 |aCanadian Stock Assessment Secretariat research document, |x1480-4883 ; |v99/115
504	|aIncludes bibliographical references (p. 10-11).
520	|aIn this study, principal component analysis (PCA) is proposed to summarize size-at-age data. Because fisheries data tend to be subject to atypical errors, a two-step procedure is proposed: a robust multivariate approach is applied to size-at-age data to identify outliers in data, and then a weighted PCA is applied with the defined outliers down-weighted. The resultant principle components (PCs) are interpreted with respect to the original variables. An indicator is identified from the resultant PCs for monitoring temporal variations in size-at-age data. The proposed approach is applied to size-at-age data of cod (Gadus morhua) in the Northwest Atlantic, NAFO subdivision 3Ps. An overall size-at-age indicator is developed for the cod stock.
692	07|2gccst|aFisheries resources
692	07|2gccst|aSalt water fish
692	07|2gccst|aFishing area
692	07|2gccst|aFisheries management
700	1 |aMello, Luiz G. S.
710	1 |aCanada. |bDepartment of Fisheries and Oceans.
710	2 |aCanada.|bCanadian Stock Assessment Secretariat.
830	#0|aCanadian Stock Assessment Secretariat research document,|x1480-4883 ; |v99/115|w(CaOODSP)9.507740
856	40|qPDF|s1.38 MB|uhttps://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-1999-115-eng.pdf