Report from the Workshop on Coregonine Restoration Science

Bronte, Charles R.; Bunnell, David B.; David, Solomon R.; Gordon, Roger; Gorsky, Dimitry; Millard, Michael J.; Read, Jennifer S.; Stein, Roy A.; Vaccaro, Lynn

doi:10.3133/ofr20171081

Cited by 24 publications

(30 citation statements)

References 1 publication

(1 reference statement)

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“…Interest in the feasibility of reintroducing and restoring cisco stocks in the Great Lakes has increased (e.g. Bronte et al, 2017), but questions related to historical abundance, life‐history characteristics and recruitment dynamics have generated debate. The findings provide context for managing cisco fisheries in Lake Superior and information on historical abundance, life‐history characteristics and recruitment dynamics, and may inform management strategies and expectations for coregonine restoration in all the Great Lakes.…”

Section: Introductionmentioning

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

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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.

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Section: Introductionmentioning

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

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“…Relatively less research [e.g., 20, 21] has been conducted linking habitat to native fish restoration in lentic ecosystems, despite their vulnerability to anthropogenic alterations (e.g., draining of coastal wetlands, hardening of shorelines, nutrient or contaminant loading). As lake ecosystems naturally include a diversity of habitats including tributaries, coastal wetlands or embayments, nearshore littoral zones, and offshore profundal and pelagic zones, the underlying requirement for diverse and connected habitats to sustain fish populations parallels that of lotic ecosystems.Managers across the Laurentian Great Lakes have prioritized restoration of native coregonines so as to increase the diversity and resilience of the fish assemblages and conserve the integrity of the ecosystems in a changing environment [22]. Coregonines were once abundant and diverse across the Great Lakes [23].…”

mentioning

confidence: 99%

“…Managers across the Laurentian Great Lakes have prioritized restoration of native coregonines so as to increase the diversity and resilience of the fish assemblages and conserve the integrity of the ecosystems in a changing environment [22]. Coregonines were once abundant and diverse across the Great Lakes [23].…”

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confidence: 99%

Describing historical habitat use of a native fish—Cisco (Coregonus artedi)—in Lake Michigan between 1930 and 1932

et al. 2020

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With the global-scale loss of biodiversity, current restoration programs have been often required as part of conservation plans for species richness and ecosystem integrity. The restoration of pelagic-oriented cisco (Coregonus artedi) has been an interest of Lake Michigan managers because it may increase the diversity and resilience of the fish assemblages and conserve the integrity of the ecosystems in a changing environment. To inform restoration, we described historical habitat use of cisco by analyzing a unique fishery-independent dataset collected in 1930-1932 by the U.S. Bureau of Fisheries' first research vessel Fulmar and a commercial catch dataset reported by the State of Michigan in the same period, both based on gear fished on the bottom. Our results confirmed that the two major embayments, Green Bay and Grand Traverse Bay, were important habitats for cisco and suggest that the Bays were capable of supporting cisco to complete its entire life cycle in the early 20th century as there was no lack of summer feeding and fall spawning habitats. Seasonally, our results showed that cisco stayed in nearshore waters in spring, migrated to offshore waters in summer, and then migrated back to nearshore waters in fall. The results also suggest that in summer, most ciscoes were in waters with bottom depths of 20-70 m, but the highest cisco density occurred in waters with a bottom depth around 40 m. We highlight the importance of embayment habitats to cisco restoration and the seasonal migration pattern of cisco identified in this study, which suggests that a restored cisco population can diversify the food web by occupying different habitats from the exotic fishes that now dominate the pelagic waters of Lake Michigan. OPEN ACCESS Citation: Kao Y-C, Bunnell DB, Eshenroder RL, Murray DN (2020) Describing historical habitat use of a native fish-cisco (Coregonus artedi)-in Lake Michigan between 1930 and 1932. PLoS ONE 15(4): e0231420. https://doi.org/10.otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication. Data Availability Statement: All relevant data are within the manuscript and its Supporting Information files.richness and ecosystem integrity [2,3]. For freshwater ecosystems, the restoration of native fishes could be a core component because fishes are not only functionally important in the food web but also economically important by supporting provisioning services [4]. To inform the restoration of native fishes, most frameworks delineate populations or stocks based on genetics and/or ecology [5,6] and then assess existing biotic and/or abiotic threats [7-10], including the potential for habitat limitation [11][12][13].The linkage between habitat and native fish restoration is based on the conservation principle that sustainable fish populations require a network of diverse habitats that support each life history stage [14], and, ideally, a diverse population structure across the landscape [15,16]. Most of this research has been conduct...

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“…Given the extensive degree of developmental plasticity in coregonines, propagation has been proposed as a practical way to reintroduce native species from lakes with extirpated or reduced population levels (Bronte et al, 2017; Zimmerman and Krueger, 2009). A key uncertainty to maximizing restoration efforts is whether managers should prioritize survival in propagation methods by mimicking natural environmental conditions (Bronte et al, 2017). Our study highlights the potential role of winter light conditions, the influence of light intensity on cisco embryo development, and the impact changing ice regimes may have on cisco survival and recruitment in the wild.…”

Section: Discussionmentioning

confidence: 99%

Shining a light on Laurentian Great Lakes cisco (Coregonus artedi): how ice coverage may impact embryonic development

Stewart

Vinson²,

Stockwell

2021

Preprint

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Changes in winter conditions, such as decreased ice coverage and duration, have been observed in the Laurentian Great Lakes over the past 20+ years and hypothetically linked to low Coregonus spp. survival to age-1. Most cisco (Coregonus artedi) populations are autumn spawners whose embryos incubate under ice throughout the winter. The quantity and quality of light during winter is regulated by ice and snow coverage, and light has been shown to affect embryo survival and development in some teleosts. We experimentally evaluated how cisco embryos from lakes Superior and Ontario responded to three light treatments that represented day-light intensity under 0-10, 40-60, and 90-100% ice coverage. Embryonic response measures included two developmental factors (embryo survival and incubation period) and two morphological traits (length-at-hatch and yolk-sac volume). Embryo survival was highest at the medium light treatment and decreased at high and low treatments for both populations suggesting cisco may be adapted to withstand some light exposure from inter-annual variability in ice coverage. Light intensity had no overall effect on length of incubation. Length-at-hatch decreased with increasing light in Lake Superior, but had no effect in Lake Ontario. Yolk-sac volume was positively correlated with increasing light in Lake Superior and negatively correlated in Lake Ontario. Contrasting responses in embryo development between lakes suggests differences in populations’ flexibility to light. These results provide a step towards better understanding the recent high variability observed in coregonine recruitment and may help predict what the future of this species may look like under current climate trends.

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Report from the Workshop on Coregonine Restoration Science

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Cited by 24 publications

References 1 publication

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

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

Describing historical habitat use of a native fish—Cisco (Coregonus artedi)—in Lake Michigan between 1930 and 1932

Shining a light on Laurentian Great Lakes cisco (Coregonus artedi): how ice coverage may impact embryonic development

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