000	02143nam  2200313za 4500
001	9.805572
003	CaOODSP
005	20221107135701
007	cr |||||||||||
008	150406s1999    onc     ob   f000 0 eng d
040	|aCaOODSP|beng
041	|aeng|bfre
043	|an-cn---
086	1 |aFs70-1/1999-175E-PDF
100	1 |aHay, D. E.
245	10|aAge of sexual maturation and recruitment in Pacific herring |h[electronic resource] / |cD.E. Hay and P.B. McCarter.
260	|aOttawa : |bFisheries and Oceans Canada, |c1999.
300	|a42 p. : |btables.
490	1 |aCanadian Stock Assessment Secretariat research document, |x1480-4883 ; |v99/175
504	|aIncludes bibliographic references (p. 15-16).
520	|aThis paper presents evidence to support the contention that most Pacific herring mature sexually at age 3 in all major assessment areas of British Columbia. The paper is organized according to 3 main topics: (1) percent at age data, (2) analyses of sexual maturity, and (3) a brief analysis of some temporal and spatial factors associated with the samples of spawning fish. Within the section on analyses of sexual maturity, 2 different approaches are presented in support of the contention that age 3 herring are sexually mature: based microscopic analyses of the size composition of developing eggs (oocytes) in ovaries as criteria of maturation, and catch sampling data to support an analysis of gonad weights in conjunction with the Hjort maturity index. The paper concludes with a discussion of the implication of the results presented and recommendations concerned with stock assessment and management.
692	07|2gccst|aFisheries resources
692	07|2gccst|aSalt water fish
692	07|2gccst|aFisheries management
700	1 |aMcCarter, P. B.
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 ; |v99/175|w(CaOODSP)9.507740
856	40|qPDF|s128 KB|uhttps://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-1999-175-eng.pdf