Lagging spawning and increasing phenological extremes jeopardize walleye (Sander vitreus) in north‐temperate lakes

Limnology and Oceanography Letters, Journal Year: 2024, Volume and Issue: 9(3), P. 229 - 236

Published: Feb. 26, 2024

Abstract The phenology of critical biological events in aquatic ecosystems is rapidly shifting due to climate change. Growing variability phenological cues can increase the likelihood trophic mismatches (i.e., timing peak prey and predator abundances), causing recruitment failures important fisheries. We assessed changes spawning walleye ( Sander vitreus ) 194 Midwest US lakes investigate factors influencing responses change associated variability, including ice‐off timing, lake physical characteristics, population stocking history. Ice‐off shifted earlier, about three times faster than over time. Spawning deviations from historic averages increased magnitude time, large were with poor offspring survival. Our results foreshadow risks increasingly frequent natural between historically tightly coupled phenology.

Language: Английский

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Resisting ecosystem transformation through an intensive whole‐lake fish removal experiment

Fisheries Management and Ecology, Journal Year: 2022, Volume and Issue: 29(4), P. 364 - 377

Published: March 31, 2022

Abstract Lake ecosystems are shifting due to many drivers including climate change and landscape‐scale habitat disturbance, diminishing their potential support some fisheries. Walleye Sander vitreus (Mitchill) populations, which recreational tribal fisheries across North America, have declined in lakes. Climate change, harvest, invasive species concurrent increases warm‐water fishes (e.g. Centrarchidae) may contributed declines. To test the utility of an intensive management action resist walleye loss, experimental removal ~285,000 centrarchids from a 33‐ha lake over 4 years was conducted while monitoring fish community response. Centrarchid abundance yellow perch Perca flavescens increased, yet no evidence recruitment observed. These findings explore feasibility resistance as strategy supporting facing environmental provide platform for discussions move beyond strategies Resist‐Accept‐Direct (RAD) framework navigate ecosystem change.

Language: Английский

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Ecological and social strategies for managing fisheries using the Resist‐Accept‐Direct (RAD) framework

Fisheries Management and Ecology, Journal Year: 2022, Volume and Issue: 29(4), P. 329 - 345

Published: April 21, 2022

Abstract Fisheries management is a complex task made even more challenging by rapid and unprecedented socioecological transformations associated with climate change. The Resist‐Accept‐Direct (RAD) framework can be useful tool to support fisheries in facing the high uncertainty variability aquatic ecosystem transformations. Here, RAD strategies are presented address ecological goals for ecosystems social fisheries. These mapped on controllability matrix which explores ability guide system's behaviour towards desired state based responsiveness societal receptivity Understanding improving of systems help managers maintain broadest suite available strategies.

Language: Английский

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Biological Invasions in Fresh Waters: Micropterus salmoides, an American Fish Conquering the World

Water, Journal Year: 2023, Volume and Issue: 15(21), P. 3796 - 3796

Published: Oct. 30, 2023

Biological invasions in fresh waters cause biodiversity loss and impairment of ecosystem functioning. Many freshwater invasive species are fish, including the largemouth bass Micropterus salmoides, which is considered one 100 worst world. Fast individual growth rates, high dispersal ability, ecological tolerance, trophic plasticity among characteristics contributing to its success. The negative impact M. salmoides on littoral fish communities believed be mitigated by habitat structural complexity resulting from aquatic vegetation coarse woody debris, while main limits spread seem strong water flows turbidity, impairs visual predation. Together with human overexploitation potential antagonists, alteration could result having seriously detrimental effects native biodiversity. purpose this study critically review life history ecology ecosystems outside North America, anthropogenic activities spread. This will highlight environmental factors that favor or limit success, helping identify management measures might mitigate

Language: Английский

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Asymmetric impacts of climate change on thermal habitat suitability for inland lake fishes

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 27, 2024

Climate change is altering the thermal habitats of freshwater fish species. We analyze modeled daily temperature profiles from 12,688 lakes in US to track changes habitat 60 lake species different guilds during 1980-2021. quantify each species' preferred days, defined as number days per year when a contains temperature. find that cooler-water are losing more rapidly than warmer-water gaining them. This asymmetric impact cannot be attributed differences geographic distribution among species; instead, it linked seasonal dynamics temperatures and increased homogenization water column. The potential advantages an increase may not fully compensate for losses warming continues, emphasizing importance mitigating climate support effective fisheries management. habitats. Here, authors examine species, finding cold-water fishes at faster rate warm-water

Language: Английский

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Invasive control and native restoration: Directing ecosystem transformation through purposeful food web manipulations

Fisheries, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

ABSTRACT Ecosystems are abruptly changing due to invasive species and global climate change. In lakes, Rainbow Smelt Osmerus mordax can cause negative ecosystem effects through competitive predatory interactions with native leading food web shifts away from dominance, altered zooplankton communities, the decline or extirpation of cool coldwater fishes. We conducted two whole-lake removals simultaneous introductions Cisco Coregonus artedi stocking. About 327 1.6 adult Smelt/ha were removed about 45 Cisco/ha stocked over 4 years into experimental lakes. one system, Yellow Perch Perca flavscens relative abundance density significantly increased by 556% 143% post-manipulation, respectively. other Walleye Sander vitreus 26% became consistently present in pelagic zone post-manipulation (allowing for estimation). decreased >85% both The ecosystems shifted dominance while insignificant components webs. these intensive manipulations, we applied Resist–Accept–Direct (RAD) adaptation framework test an applicable ecological strategy used panarchy theory as ecologically grounded pathway purposefully direct transformation. this holistic management better understand manage undesired change—“food thinking.” context our study, directed towards structures, interactions, processes, which mitigated driven effects.

Language: Английский

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The decline of walleye populations: an ecological tipping point?

FACETS, Journal Year: 2025, Volume and Issue: 10, P. 1 - 17

Published: Jan. 1, 2025

Walleye/ogaa ( Sander vitreus (Mitchill)) (hereafter, walleye; ogaa = Ojibwe translation) populations have historically supported important multi-use, harvest-oriented fisheries. Despite intensive management, walleye declined in the midwestern United States raising concerns about sustainability of species. Numerous factors been implicated population declines, including climate change, habitat loss, invasive species, species-interactions, production overharvest (i.e., harvest consistently exceeding annual production), and changing angler behaviors. These negatively influenced natural recruitment contributed to depensatory dynamics. I provide a review perspective suggesting that current trajectory is at or nearing an ecological tipping point. Although fish are often considered compensatory density-dependent), appear prone depensation positive density dependence). My suggest management for misaligned. A change towards resource focus using ecosystem-based fisheries recognition as social–ecological systems needed conservation. If ensues, persistence will likely be further threatened because many drivers outside managerial control, those commonly used within control seemingly ineffective sustaining rehabilitating naturally reproducing populations.

Language: Английский

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Healing Ogaa (Walleye Sander vitreus ) Waters: Lessons and Future Directions for Inland Fisheries Rehabilitation

Reviews in Fisheries Science & Aquaculture, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 19

Published: April 9, 2025

Language: Английский

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A Resist‐Accept‐Direct decision‐support tool for walleye Sander vitreus (Mitchill) management in Wisconsin

Fisheries Management and Ecology, Journal Year: 2022, Volume and Issue: 29(4), P. 378 - 391

Published: April 3, 2022

Abstract Large‐scale modelling and prediction provide insight into general influences of climate change on inland recreational fisheries; however, small‐scale dynamics local expertise will be key in developing explicit goals for managing fisheries as the changes. The resist‐accept‐direct (RAD) framework encompasses entire decision space managers consider when addressing their system, but to decide whether resist, accept or direct, need tools understand how specific waterbodies influenced by change. Here, a decision‐support tool was developed applied walleye fishery Wisconsin, USA an example link RAD real‐world management large fishery. broadscale results described here, indicating widespread shift away from resist strategies mid‐century, can used inform decisions about accept, direct populations.

Language: Английский

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Managing ecosystems with resist–accept–direct (RAD)

Methods in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 15(5), P. 796 - 805

Published: March 19, 2024

Abstract In recent years considerable interest has been generated in a new approach known as resist – accept direct , or RAD, for managing ecosystems the face of climate change. Under strategic responses to change are described terms three broad categories: resisting transformation, accepting transformation and continuing manage best one can, directing transformed system toward novel ecological conditions. particular, potential integrating RAD adaptive management broadly considered, though absent decision‐making framework needed implementation. We propose hierarchical decision scheme that accounts strategy selection among options, well making within each option. use stochastic models uncertainties about ecosystem processes account dynamics climate‐transformed ecosystems, show how these features can be used inform strategies. Operationally, involves decisions at two levels: level choosing policy strategy, second deciding which greatest value. The structure here extends work adaptation, by including Markovian under change, strategy‐specific policies, value functions assessing selecting provide accounting responses, develop rules timing those decisions. Combining help organize thinking conservation focus attention on mechanisms believe presented facilitate efforts non‐stationary conditions we sure foreseeable future.

Language: Английский

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