Understanding drivers of recruitment variation in fish populations requires research conducted on early life stages. Examination otoliths provides useful information for estimating hatching dates, growth, and survival rates larvae investigating the relationship between stage phenology environmental factors such as climate food availability. In Laurentian (i.e., North American) Great Lakes, sign...

Accelerated growth of freshwater fish during anthropogenic eutrophication has been attributed almost exclusively to the increased nutrient content, while density-dependent effects have been largely neglected. We evaluated the relative importance of these factors by studying the growth of 43 consecutive year classes of common whitefish (Coregonus lavaretus) from Upper Lake Constance. This prealp...

This study was designed to test the hypothesis that anadromous populations of North American whitefish, Coregonus clupeuformis (Mitchill), believed to have suffered more intense population bottlenecks during past glaciation events, should reveal less mitochondrial DNA (mtDNA) variability and population-genetic structuring than anadromous populations of European whitefish, C. luvuretus (L.). C. ...

1. Whitefish eggs incubated in aerated lake water at controlled tempera tures of 0 degrees , 0.5 degrees , 2 degrees , 4 degrees , 6 degrees , 8 degrees , 10 degrees , and 12 degrees C., failed to hatch at either 0 degrees or 12 degrees C. 0.6 per cent hatched alive at 10 degrees C., 72.67 per cent hatched alive at 0.5 degrees C., and an intermediate proportion hatched at intermediate temperatu...

Abstract We used bomb calorimetry to quantify the energy density of three Prosopium fish species endemic Bear Lake, Utah–Idaho, that we collected in 2020–2021: Lake Whitefish abyssicola, Bonneville spilonotus, and Cisco gemmifer. found mean ± standard deviation wet weight densities were 6,312 760 J/g for Whitefish; 5,301 778 4,743 443 Cisco. built linear mixed models relationships between dry m...

First posted November 23, 2022 For additional information, contact: Director, Forest and Rangeland Ecosystem Science Center777 NW 9th Street, Suite 400Corvallis, OR 97330 In this report, we consider evolutionary ecological connectivity for westslope cutthroat trout (Oncorhynchus clarkii lewisi) mountain whitefish (Prosopium williamsoni) within the Pend Oreille River in northeastern Washington S...

This paper applies cost-benefit analysis to assess social and private net benefits from rainbow trout European whitefish aquaculture under recirculating system (RAS) marine cage technologies. In addition investment operational costs, we include eutrophication damage nutrients value the fish produced by its producer price. The assessment is made in terms of annualized present benefits. We find t...

Adaptive evolutionary change is contingent on variation and selection; thus, understanding adaptive divergence and ultimately speciation requires information on both the genetic basis of adaptive traits as well as an understanding of the role of divergent natural selection on those traits. The lake whitefish (Coregonus clupeaformis) consists of several sympatric "dwarf" (limnetic) and normal (b...