title: Maternal influences on thiamine status of walleye Sander vitreus ova.
abstract: Concentrations of the various forms of thiamine (vitamin B(1) ) were determined in walleye Sander vitreus ova from three central North American lakes. Total thiamine concentrations in ova from Lake Winnipeg S. vitreus were approximately three times greater (mean 12 nmol g(-1) ) than in those from Lakes Erie or Ontario. The percentage of thiamine in the active form (thiamine pyrophosphate, TPP) was highest in Lake Ontario ova (mean 88%) and lowest in those from Lake Winnipeg (mean 70%). Neither ova total thiamine concentration nor per cent ova thiamine as TPP showed any consistent relationships with maternal age, size, morphometric condition, somatic lipid concentrations or liver lipid concentrations. Ova total thiamine concentration, however, was negatively related to ovum size in some populations, as well as among populations, and was positively related to liver total thiamine concentration. Maternal transfer of thiamine to ova appears to be independent of female ontogenetic or conditional state in S. vitreus.
authors.affiliation: Department of Biology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9 Canada. m.wiegand@uwinnipeg.ca
authors.forename: M D
authors.initials: MD
authors.lastname: Wiegand
authors.forename: T A
authors.initials: TA
authors.lastname: Johnston
authors.forename: L R
authors.initials: LR
authors.lastname: Brown
authors.forename: S B
authors.initials: SB
authors.lastname: Brown
authors.forename: J M
authors.initials: JM
authors.lastname: Casselman
authors.forename: W C
authors.initials: WC
authors.lastname: Leggett
mesh_terms: D000818:Animals; D048429:Cell Size; D005260:Female; D008099:Liver / Q000378:metabolism; D010063:Ovum / Q000166:cytology / Q000378:metabolism*; D010471:Perches / Q000378:metabolism / Q000502:physiology*; D013831:Thiamine / Q000378:metabolism*
chemical_list: D013831:Thiamine