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Full-Text Articles in Life Sciences

Invasive Fish Effects On The Invertebrate Constituents Of Wetland Communities, Levi Bridges Jan 2011

Invasive Fish Effects On The Invertebrate Constituents Of Wetland Communities, Levi Bridges

EWU Masters Thesis Collection

The purpose of this research was to assess the impacts of invasive fishes on wetland communities. Within this study we explored fish effects on the invertebrate constituents of these wetlands, and possible niche overlap of fish and dabbling waterfowl using stable isotope analysis. Brook stickleback (Culaea inconstans) and pumpkinseed (Lipomis gibbosus) pose a potentially growing threat to temperate Pacific drainages of North America due to their ability to outcompete native fauna. Our study compares and contrasts the invertebrate constituents, their diversity, abundances, and stable isotope ecology among fish invaded and non-invaded wetlands. We found that brook stickleback and pumpkinseed are …


Diet, Growth And Bioenergetics Of Northern Pike (Esox Lucius Linnaeus, 1758) In Box Canyon Reservoir, Pend Oreille River, Washington, Shane Joseph Harvey Jan 2011

Diet, Growth And Bioenergetics Of Northern Pike (Esox Lucius Linnaeus, 1758) In Box Canyon Reservoir, Pend Oreille River, Washington, Shane Joseph Harvey

EWU Masters Thesis Collection

"The objectives of this study were to describe the growth of northern pike, describe the food habits of northern pike and using bioenergetics modeling assess the mass and total numbers of each species of forage fish the northern pike population consumed in Box Canyon Reservoir,Pend Orielle River, Washington. Northern pike (n=328) were collected by boat electrofishing, fyke netting, angling and gillnetting in 2009 and 2010. All northern pike were sacrificed to obtain stomach contents. Stomach contents were examined in the laboratory and identified to the appropriate level; amphibians and mammals to species, insect prey (aquatic/terrestrial) to family and prey fish …


Factors Affecting Growth And Condition Of Stocked Rainbow Trout In Eastern Washington Lakes, Tamara Knudson Jan 2011

Factors Affecting Growth And Condition Of Stocked Rainbow Trout In Eastern Washington Lakes, Tamara Knudson

EWU Masters Thesis Collection

"Rainbow trout growth and condition were examined in 17 ecologically diverse lakes from which physical, limnological, and biological parameters were sampled. Parameters were correlated with rainbow trout growth and condition to identify factor(s) that predict rainbow trout growth and condition across eastern Washington lakes stocked annually with rainbow trout fry. We tested the hypothesis Ho: the environmental variables examined do not predict rainbow trout growth and condition. Data were natural log transformed for better fit, and were analyzed by season. Several models were identified using stepwise multiple regression analysis and general linear modeling which significantly predicted trout growth or condition …