Browsing Aquatic Ecology Laboratory Publications by Title
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Allocating Sampling Effort to Equalize Precision of Electrofishing Catch per Unit Effort
Kershner, Mark W.; Marschall, Elizabeth A. ( 1998 )We used a spatially explicit simulation model to examine the effects of lake shoreline length and lakewide fish density on electrofishing catch-per-unit-effort (CPUE) estimates of fish density. We also tested model predictions ... -
An analysis of the mechanisms governing species replacements in crayfish
Butler, Mark J. IV; Stein, Roy A. ( 1985 )We investigated mechanisms governing replacement of the native crayfish Orconectes sanborni by an invading crayfish, Orconectes rusticus. The two species had similar life histories, habitat preferences, and feeding patterns ... -
Androgenesis and Homozygous Gynogenesis in Muskellunge (Esox masquinongy): Evaluation Using Flow Cytometry
Lin, Feng; Dabrowski, Konrad ( 1998 )The purpose of this work was to study the effects of ultraviolet (UV) irradiation on denucleation of eggs and investigate the heat-shock conditions for diploidization for induction of androgenesis in muskellunge, Esox ... -
Application of Liquid Oxytetracycline in Formulated Feeds to Mark and Treat Tiger Muskellunge (Northern Pike X Muskellunge)
Wahl, David H.; Stein, Roy A. ( 1987-10 )When added to pelleted diets. liquid oxytetracycline (500 mg/kg of fish per day) was effective in marking (after 12 d) and disease treatment (after 3 d) of tiger muskellunge (the hybrid of northern pike, Esox lucius, and ... -
Assessing density-dependent establishment and dispersal: an example using caddisfly larvae
Kerans, B. L.; Chesson, Peter L.; Stein, Roy A. ( 2000 )Density dependence in colonization is poorly understood. We studied colonization by a benthic, stream-dwelling caddisfly, Hydropsyche slossonae, through experiments varying conspecific densities and environmental conditions. ... -
Assessing How Fish Predation and Interspecific Prey Competition Influence a Crayfish Assemblage
Garvey, James E.; Stein, Roy A.; Thomas, Heather M. ( 1994 )In northern Wisconsin lakes. the introduced crayfish 0rconectes rusticus is replacing 0. propinquus, a previous invader, and 0. virilis,a native crayfish. Herein, we explore how fish predation and competition interact to ... -
Assessing Population Responses to Multiple Anthropogenic Effects: A Case Study with Brook Trout
Marschall, Elizabeth A.; Crowder, Larry B. ( 1996 )Population declines are often caused by multiple factors, including anthropogenic ones that can be mitigated or reversed to enhance population recovery. We used a size-classified matrix population model to examine multiple ... -
Assessing Significance of Physiological Differences among Three Esocids with a Bioenergetics Model
Bevelhimer, Mark S.; Stein, Roy A.; Carline, Robert F. ( 1985 )To predict stocking success of esocids in Ohio waters with different thermal regimes, we measured individual food consumption, conversion efficiency, growth, and metabolic rate for Ohio stocks of northern pike (Esox lucius), ... -
Balancing conservation and economic gain: a dynamic programming approach
Doherty, Paul F. Jr.; Marschall, Elizabeth A.; Grubb, Thomas C. Jr. ( 1999 )We optimize the trade-off between economic and ecological concerns in conservation biology by using a novel method to link a spatially explicit individual-based model to a dynamic programming model. To date, few optimality ... -
Behavior of fish predators and their prey: habitat choice between open water and dense vegetation
Savino, Jacqueline F.; Stein, Roy A. ( 1989 )Behavior of largemouth bass, Micropterus salmoides, and northern pike, Esox lucius, foraging on fathead minnows, Pimephales promelas, or bluegills, Lepomis macrochirus, was quantified in pools with 50% cover (half the ... -
Biological Invasion Theory: Darwin's Contributions from The Origin of Species
Ludsin, Stuart A.; Wolfe, Andrea D. ( 2001 ) -
Bluegill growth as modified by plant density: an exploration of underlying mechanisms
Savino, Jacqueline F.; Marschall, Elizabeth A.; Stein, Roy A. ( 1992 )Bluegill (Lepomis macrochira) growth varies inconsistently with plant density. In laboratory and field experiments, we explored mechanisms underlying bluegill growth as a function of plant and invertebrate density. In the ... -
Changes in Prey Fish Populations in Western Lake Erie, 1969-88, as Related to Walleye, Stizostedion vitreum, Predation
Knight, Roger L.; Vondracek, Bruce ( 1993 )Relative abundance of the total prey fish community in the western basin of Lake Erie varied little from 1969 to 1988, but species composition changed significantly. Soft-rayed fishes such as emerald shiner, Notropis ... -
Characteristics of Muskellunge Spermatozoa I: Ultrastructure of Spermatozoa and Biochemical Composition of Semen
Lin, Feng; Liu, Li; Dabrowski, Konrad ( 1996 )We investigated the ultrastructure of spermatozoa and some physiological and biochemical parameters of semen in muskellunge Esox musquinongy. Ultrastructure of spermatozoa analyzed with scanning and transmission electron ... -
Characteristics of Muskellunge Spermatozoa II: Effects of Ions and Osmolality on Sperm Motility
Lin, Feng; Dabrowski, Konrad ( 1996 )We investigated the effects of potassium, sodium, glucose, and calcium concentrations, alone or in combinations, on sperm motility in muskellunge Esox masquinongy. Sperm motility was evaluated by the duration of sperm ... -
Cold, Northern Winters: The Importance of Temperature to Overwinter Mortality of Age-0 White Crappies
McCollum, Arthur B.; Bunnell, David B.; Stein, Roy A. ( 2003 )Survival during the first winter of life can influence the recruitment of many fishes. We used field sampling and laboratory experiments to explore the mechanisms underlying first winter growth and survival of white crappie ... -
Comparative Population Characteristics of Muskellunge (Esox masquinongy), Northern Pike (E. lucius), and Their Hybrid (E. masquinongy x E. lucius)
Wahl, David H.; Stein, Roy A. ( 1993 )We compared growth, survival, diet, and angler catch of muskellunge (Esox masquinongy), northern pike (E. lucius), and tiger muskellunge (E. masquinongy x E. lucius) through 5 yr after their introduction into three Ohio ... -
Comparative Vulnerability of Three Esocids to Largemouth Bass (Micropterus salmoides) predation
Wahl, David H.; Stein, Roy A. ( 1989 )We compared vulnerability among tiger muskellunge (Esox masquinongy x E. lucius) (TM), northern pike (E. lucius) (NP), and muskellunge (E. masquinongy) (M) to predation by largemouth bass (Micropterus salmoides). Equal ... -
Comparison of Foraging Performance of Diploid and Triploid Saugeyes (Sauger x Walleye)
Czesny, Sergiusz; Garcia-Abiado, Mary Ann; Dabrowski, Konrad; Bajer, Przemyslaw; Zalewski, Maciej ( 2002 )To evaluate the performance and quality of triploid saugeyes (female walleye Stizostedion vitreum x male sauger S. canadense), we compared their foraging behavior with that of diploid conspecifics. Triploidy was induced ... -
Competition between Larval Fishes in Reservoirs: The Role of Relative Timing of Appearance
Garvey, James E.; Stein, Roy A. ( 1998 )In small, hypereutrophic reservoirs (<100 ha; >100 mg total phosphorus/L), larval gizzard shad Dorosoma cepedianum and threadfin shad D. petenense (henceforth, shad) reach high densities in the limnetic zone, virtually ...