Development and Evaluation of a Bioenergetics Model for Saugeye

Zweifel, Richard D.; Landis, Andrew M. Gascho; Hale, Robin; Stein, Roy A.

doi:10.1577/t08-129.1

Cited by 14 publications

(26 citation statements)

References 40 publications

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“…Location predictor: growth rate potential.-We used a saugeye bioenergetic model (Zweifel et al 2010) as the basis for estimating saugeye GRP in the reservoir for each critical period. The GRP model combined water temperature, saugeye consumption, gizzard shad biomass and distribution, and saugeye size to describe the maximum saugeye growth possible under a given set of conditions (Brandt and Kirsch 1993).…”

Section: Methodsmentioning

confidence: 99%

Modeling Habitat Selection of a Top Predator: Considering Growth and Physical Environments in a Spatial Context

May

Aday²,

Hale

et al. 2012

Trans Am Fish Soc

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Mechanisms associated with habitat selection by fishes are often unknown and require both physical habitat and growth environment considerations. We used spatially explicit prey biomass estimates, predator growth rate potential (GRP), bottom slope, predator distance from shore, and substrate data to predict habitat use of the saugeye (walleye Sander vitreus × sauger S. canadensis), a popular sport fish that is stocked throughout the central United States. We used telemetry to determine saugeye locations, acoustics to estimate prey biomass and distributions, and a bioenergetics model to aid in calculation of GRP. Akaike's information criterion was used to determine which habitat variables were most important in explaining saugeye location. Models that included both physical habitat and either GRP or prey density performed better than models that considered only one of these parameter types. The resulting models provided the data to create location suitability maps. In general, saugeyes favored steep slopes over hard substrates in nearshore areas with high biomass of gizzard shad Dorosoma cepedianum or high GRP. This comprehensive analysis suggests that the consideration of both spatial habitat suitability and temporal prey availability may improve fisheries management and conservation through a quantitative appreciation of available resources.An understanding of habitat selection and use by animals requires an understanding of both physical habitat and the growth environment. Through its effects on population dynamics and community structure, habitat has the ability to shape life his-

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Section: Methodsmentioning

confidence: 99%

Modeling Habitat Selection of a Top Predator: Considering Growth and Physical Environments in a Spatial Context

May

Aday²,

Hale

et al. 2012

Trans Am Fish Soc

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“…Our models simulated habitat quality in terms of GRP (g g −1 day −1 ) using bioenergetics-based GRP modelling (Brandt & Mason, 2003; TA B L E 4 Parameters and variables used in the bioenergetics model used to quantify fish habitat quality in Acton Lake and Hoover Reservoir, Ohio We used species-specific parameter values determined in other bioenergetic studies: Rice et al (1983) for largemouth bass (LMB), Zweifel et al, (2010) for saugeye (SAE), and Kitchell et al (1977) with modifications from Brandt et al (2011) for walleye (WAE). Dissolved oxygen function parameters, IP and STP, were estimated from growth and consumption experiments by Stewart et al (1967) for LMB.…”

Section: Bioenergetics Modelmentioning

confidence: 99%

Projecting future habitat quality of three midwestern reservoir fishes under warming conditions

Budnik

Conroy

Zweifel

et al. 2020

Ecology of Freshwater Fish

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Rising temperatures caused by climate change are likely to affect cool‐water and warm‐water fishes differently. Yet, forecasts of anticipated temperature effects on fishes of different thermal guilds are lacking, especially in freshwater ecosystems. Towards this end, we used spatially explicit, growth rate potential (GRP) models to project changes in seasonal habitat quality for a warm‐water piscivore (largemouth bass Micropterus salmoides), a cool‐water piscivore (walleye Sander vitreus) and a hybrid piscivore (saugeye S. vitreus × S. canadensis) in two Midwestern reservoirs. We assessed habitat quality for two periods (early and middle 21st century) under two realistic greenhouse gas emission scenarios (a mid‐century emissions peak and a rapid continuous increase in emissions). Largemouth bass were projected to experience enhanced or slightly reduced habitat during all seasons, and throughout the mid‐21st century. By contrast, walleye habitat was projected to decline with anticipated warming, except during the spring in the smaller of our two study reservoirs and during the fall in the larger of our two study reservoirs. Saugeye habitat was projected to either increase modestly or decline slightly during the spring and fall and declines in habitat quality and quantity that were smaller than those for walleye were identified during summer. Collectively, our findings indicate that climate warming will differentially alter habitat suitability for reservoir piscivores, favouring warm‐water species over cool‐water species. We expect these changes in habitat quality to impact the dynamics of reservoir fish populations to varying degrees necessitating the consideration of climate when making future management decisions.

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“…For example, Kitchell, Stewart, and Weininger () determined that walleye prey consumption stops when temperature exceeds 27°C. Zweifel, Gascho Landis, Hale, and Stein () determined that saugeye consumed prey at a rate of >3% of body weight per day at 28°C. However, in our study the highest water temperatures of the year occurred during July and August, reaching 30.6°C, which is around the upper thermal limits of juvenile sauger (30.4°C) and walleye (29°C; Hokanson, ).…”

Section: Discussionmentioning

confidence: 99%

Otolith annulus validation and variables influencing false annuli formation in dorsal spines of saugeye

2018

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Marginal increment analysis is a common technique for validating formation of a single annual growth ring on an ageing structure. False annuli can form on ageing structures when environmental variables affect growth of a fish, potentially resulting in age estimation bias. Therefore, validating ageing structures is essential to ensure that accurate and precise age estimates are collected when assessing fish population dynamics. Saugeye (Sander vitreus, [Mitchill, 1818]) and S. Canadensis, [Griffith and Smith, 1834]) are highly valued sport fish that are stocked across the Midwest United States. Using marginal increment analysis, we confirmed that a single annulus was formed yearly in otoliths of juvenile saugeye, however two annuli formed in dorsal spines in a single year. Timing of the first annulus formation in both otoliths and dorsal spines was completed after a slow growth period during winter (otoliths forming in April; dorsal spines forming in March). The second annulus (false annulus) that formed during August in dorsal spines did not form in otoliths. To understand what environmental factors may influence the false annulus to form, we collected monthly water temperatures and percent empty stomachs of juvenile saugeye. The highest water temperatures of the year occur during July and August, which resulted in saugeye seeking thermal refuge and affecting feeding habits. Mean monthly temperature and percent empty stomachs were positively correlated, so during times of high temperatures foraging rates declined, suggesting the formation of false annulus on dorsal spines of juvenile saugeye. This study demonstrates how thermal stress affected accuracy of non‐lethal aging structures and further emphasizes the need for age validation studies prior to using non‐lethal ageing structures to estimate age for a particular species from different aquatic systems.

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Development and Evaluation of a Bioenergetics Model for Saugeye

Cited by 14 publications

References 40 publications

Modeling Habitat Selection of a Top Predator: Considering Growth and Physical Environments in a Spatial Context

Modeling Habitat Selection of a Top Predator: Considering Growth and Physical Environments in a Spatial Context

Projecting future habitat quality of three midwestern reservoir fishes under warming conditions

Otolith annulus validation and variables influencing false annuli formation in dorsal spines of saugeye

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