Lake Sturgeon, <em>Acipenser fulvescens</em>, Movements in Rainy Lake, Minnesota and Ontario

Lake sturgeon population attributes and reproductive structure in the NamakanReservoir, Minnesota and Ontario

Growth and Appetite of Juvenile Lake sturgeon Acipenser fulvescens

–Growth rates of juvenile lake sturgeon (initial weight 8 to 9 g, temperature 17.5° C), fed twice a day on brown worms for 56 days increased from -1.5% BW/d (% body wet weight/day) at zero ration to 2.6% BW/d at a ration of 13.2% BW/d. Maintenance ration was 1.6% BW/d. Fish fed larger rations had higher energy densities and lower water content. Appetite (average volitional daily food consumptio...

Isomers of dechlorane plus in Lake Winnipeg and Lake Ontario food webs.

The extent of bioaccumulation of the syn- and anti-isomers of Dechlorane Plus (DP) is assessed in archived food web samples from Lake Winnipeg and Lake Ontario. Concentrations of the isomers were determined using purified analytical solutions of individual isomers as opposed to the technical mixture. The syn-isomer was consistently detected in all samples from both lakes; the anti-isomer was de...

Integrated Ecosystem Assessment: Lake Ontario Water Management

BACKGROUND Ecosystem management requires organizing, synthesizing, and projecting information at a large scale while simultaneously addressing public interests, dynamic ecological properties, and a continuum of physicochemical conditions. We compared the impacts of seven water level management plans for Lake Ontario on a set of environmental attributes of public relevance. METHODOLOGY AND FIN...

Genetic Analysis of Lake Sturgeon Tissue Relative to Sex Determination

Background(s) and Objective(s) In mammals and birds, sex is dictated by the chromosomal constitution and is thus genetic (mammalian males are XY and females are XX). However, many fi shes have environmental sex determination without sex chromosomes. Their sex is determined by egg incubation temperature or by social status. The objective of this project was to evaluate the working hypothesis tha...