Crustacean zooplankton available for larval walleyes in a Lake Michigan embayment

Zorn, Troy G.; Hayes, Daniel B.; McCullough, Darrin E.; Watson, Nicole M.

doi:10.1016/j.jglr.2020.06.017

Cited by 6 publications

(7 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Likewise, densities of zooplankton in these areas during the critical period for larval Walleyes were also well below values identified for good growth and survival, suggesting a potential limitation to natural reproduction, which has been relatively low since 2000 (Zorn et al. 2020). Thus, climate conditions and factors influencing zooplankton density in nursery habitats during these critical periods may potentially influence percid recruitment and ultimately adult abundance.…”

Section: Discussionmentioning

confidence: 95%

“…Densities of zooplankton in June samples from several nearshore areas in LBDN and BBDN during 2014–2016 averaged fewer than six individuals per liter, suggesting low zooplankton density as a potential limitation to Yellow Perch recruitment (Zorn et al. 2020). Likewise, densities of zooplankton in these areas during the critical period for larval Walleyes were also well below values identified for good growth and survival, suggesting a potential limitation to natural reproduction, which has been relatively low since 2000 (Zorn et al.…”

Section: Discussionmentioning

confidence: 99%

“…Lake Michigan water levels were below the long-term average from 1999 to 2014 until water levels moved above the long-term average in 2015. Zorn et al (2020) sampled zooplankton availability for larval Walleyes in both bays during 2014-2016, observing very low densities overall but significantly higher densities in 2016 when water levels were elevated from previous years. Current water levels are considerably higher than those of 2016.…”

Section: Lake Levels Fish Recruitment and Management Implicationsmentioning

confidence: 99%

See 2 more Smart Citations

Changes in Habitat Conditions, Fish Populations, and the Fishery in Northern Green Bay, Lake Michigan, 1989–2019

Zorn

Kramer

2021

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

Aquatic environments and biological communities in nearshore waters of the Laurentian Great Lakes have undergone extensive change in recent decades. The nearshore waters of northern Green Bay, Lake Michigan, have been subject to environmental change but are relatively unstudied, despite hosting important fisheries for Walleye Sander vitreus, Yellow Perch Perca flavescens, Northern Pike Esox lucius, and Smallmouth Bass Micropterus dolomieu. Our objectives were to (1) test for changes in water clarity and fish populations in northern Green Bay, Lake Michigan, during 1989-2019, (2) depict recent spatial patterns in abundance for species of management interest, and (3) test for effects of recent Great Lakes water level changes on Northern Pike recruitment. Fishes were sampled annually in August and September 1989-2019 via trawl and gill-net surveys at index sites. Mean water clarity increased 30% over this period. Aside from Round Goby Neogobius melanostomus, total catch rate of species in trawls decreased by over 90% between the 1990s and 2010s, with significant declines for Yellow Perch and pelagic forage fishes (coincident with dreissenid mussel invasion). Fish species richness in trawl and gill-net surveys and total gill-net catch rates declined significantly over time. Trends in gill-net catch rates of game fishes during 1989-2019 were species-specific, with spatial patterns often related to availability of preferred habitat conditions. Similar fish community changes to those we observed in northern Green Bay, Lake Michigan, have been noted in other Great Lakes, many being associated with invasion of dreissenid mussels and Round Goby. Increased water levels in Lake Michigan during the 2010s had a significant positive effect on Northern Pike recruitment, which highlights the importance of varying water levels, shoreline habitat conditions, and early life processes on population dynamics of fishes reproducing in inshore habitats.

show abstract

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Lake Levels Fish Recruitment and Management Implicationsmentioning

confidence: 99%

See 1 more Smart Citation

Changes in Habitat Conditions, Fish Populations, and the Fishery in Northern Green Bay, Lake Michigan, 1989–2019

Zorn

Kramer

2021

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

show abstract

“…Increased abundance of filter-feeding dreissenid mussels in Little Bay de Noc (Figure 1A) has resulted in increased water clarity (Figure 1C; Vanderploeg et al 2010), lower water column phosphorus levels, and reduced phytoplankton (Rowe et al 2017). The impact of this redistribution in energy also corresponds with low abundances of zooplankton (Zorn et al 2020). Prey CPUE was observed to decline from 1989 to 2002 but increased as invasive Round Goby became established (Figure 1B).…”

Section: Influence Of Cascading Effects From Dreissenid Mussels On Wa...mentioning

confidence: 98%

Stable Isotopes and Movement of Walleye Change Following Ecological Shifts Driven by Dreissenid Mussels

Whitinger

Zorn

Gerig

2022

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

The Great Lakes support some of the most productive fisheries for Walleye Sander vitreus in North America, although system-level change from overexploitation, pollution, and invasive species has dramatically changed these fisheries over time. More recently, the widespread establishment of dreissenid mussels (zebra mussel Dreissena polymorpha and quagga mussel D. bugensis) has strongly altered energy flow by sequestering nutrients in nearshore benthic habitats, thereby influencing primary, secondary, and prey fish production with implications for Walleye. While the impacts of dreissenids on the open-water food web are well established, little is known about their influence on fish populations occupying nearshore or embayment habitats. In this study, we tested the hypothesis that ecosystem changes resulting from dreissenid mussels have altered the stable isotope ratios and displacement of Walleye in Little Bay de Noc, an embayment of Lake Michigan. Retrospective isotope analysis of fin spines over a 31-year time series coincident with the invasion of dreissenid mussels suggests that alterations in energy dynamics have increased Walleye reliance on nearshore benthic energy. From reports of jaw-tagged Walleye caught over the same time period, we found significant temporal changes in Walleye displacement distances from the tagging site that were strongly size dependent following the invasion of dreissenid mussels. These results potentially suggest that the spatial distribution of large Walleye shifted in response to prey availability or habitat conditions. Additionally, sex-specific differences in Walleye displacement indicate that females move greater distances than males, possibly driven by higher energetic and reproductive demands. Our findings suggest that the largest Walleye are seasonally leaving Little Bay de Noc, potentially altering the dynamics of the sport fishery in Green Bay and impacting management programs that occur across state lines.Walleye Sander vitreus are an economically and ecologically important apex predator throughout the Great Lakes (Schmalz et al. 2011;Pothoven et al. 2017). Historically, the most productive Walleye fisheries in North America came from the Great Lakes, including Lake Michigan (Schneider and Leach 1976;Schmalz et al. 2011), but the combined effects of overexploitation, pollution, and invasive species led to large population declines

show abstract

“…Similarly, recent studies suggest that minimum total phosphorus levels may be required to maintain walleye Sander vitreus (Mitchill) and yellow perch Perca flavescens (Mitchill) recruitment and abundance in some areas of the Great Lakes (e.g. Kao et al, 2014;Zorn et al, 2020).…”

Section: 06[1][c])mentioning

confidence: 99%

Was historical cisco Coregonus artedi yield consistent with contemporary recruitment and abundance in Lake Superior?

Rook

Hansen

Goldsworthy

et al. 2021

Fisheries Management Eco

View full text Add to dashboard Cite

Historically, cisco Coregonus artedi Lesueur was the predominant prey fish and target of commercial fisheries throughout Lake Superior, but most spawning stocks collapsed by the mid‐1900s. Stocks partially recovered by the early 1990s, but contemporary abundance is considered to be below historical levels and driven by intermittent recruitment. Stochastic, age‐structured simulation models were used to determine whether historical (pre‐1955) cisco yield in Lake Superior was consistent with contemporary (1992–2015) abundance, life‐history characteristics and recruitment dynamics. When compared to contemporary stocks, the findings suggest historical stocks had: (1) similar recruits per spawner at low spawning stock sizes; (2) lower rates of compensatory density dependence; (3) similar or lower recruitment variation depending on the area and (4) higher median adult and age‐1 density. These findings are consistent with the hypothesis that eutrophication during the historical period supported greater recruitment and adult abundance and that re‐oligotrophication during the contemporary period may be limiting full recovery.

show abstract

Crustacean zooplankton available for larval walleyes in a Lake Michigan embayment

Cited by 6 publications

References 35 publications

Changes in Habitat Conditions, Fish Populations, and the Fishery in Northern Green Bay, Lake Michigan, 1989–2019

Changes in Habitat Conditions, Fish Populations, and the Fishery in Northern Green Bay, Lake Michigan, 1989–2019

Stable Isotopes and Movement of Walleye Change Following Ecological Shifts Driven by Dreissenid Mussels

Was historical cisco Coregonus artedi yield consistent with contemporary recruitment and abundance in Lake Superior?

Contact Info

Product

Resources

About