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

---

Reimagining large river management using the Resist–Accept–Direct (RAD) framework in the Upper Mississippi River

Ecological Processes, Journal Year: 2023, Volume and Issue: 12(1)

Published: Oct. 4, 2023

Abstract Background Large-river decision-makers are charged with maintaining diverse ecosystem services through unprecedented social-ecological transformations as climate change and other global stressors intensify. The interconnected, dendritic habitats of rivers, which often demarcate jurisdictional boundaries, generate complex management challenges. Here, we explore how the Resist–Accept–Direct (RAD) framework may enhance large-river by promoting coordinated deliberate responses to trajectories change. RAD identifies full decision space potential approaches, wherein managers resist maintain historical conditions, accept toward different or direct a specified future novel conditions. In Upper Mississippi River System, facing from more frequent extreme high-water events. We illustrate RAD-informed basin-, reach-, site-scale decisions could: (1) provide cross-spatial scale framing; (2) open entire approaches; (3) inter-jurisdictional in response trajectory hydrograph. Results helps identify plausible long-term reaches (or subbasins) river associated could be managed altering Strategic reach-scale objectives reprioritize how, where, when site conditions altered contribute basin goal, given basin’s (e.g., coordinating action across sites alter habitat connectivity, diversity, redundancy mosaic). Conclusions When faced systemic > 50 years), explicitly consider whether vision goals no longer achievable, options yet unconsidered for basin. Embedding hierarchical decision-making clarifies that selection actions time should derived basin-wide ensure effectively larger mosaic. can necessary conduit link flexibility innovation at stability scales adaptive governance changing systems.

Language: Английский

---

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

---

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

---

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

---

In a Good Way: Braiding Indigenous and Western Knowledge Systems to Understand and Restore Freshwater Systems

Water, Journal Year: 2024, Volume and Issue: 16(7), P. 934 - 934

Published: March 23, 2024

Insights from Indigenous and Western ways of knowing can improve how we understand, manage, restore complex freshwater social–ecological systems. While many frameworks exist, specific methods to guide researchers practitioners in bringing knowledge systems together a ‘good way’ are harder find. A scoping review academic grey literature yielded 138 sources, which data were extracted using two novel frameworks. The EAUX (Equity, Access, Usability, eXchange) framework, with water-themed acronym, summarizes important principles when braiding These demonstrate the importance recognizing collaborators as equal partners, honouring sovereignty, centring benefits, prioritizing relationships. A-to-A (Axiology Ontology, Epistemology Methodology, Data Gathering, Analysis Synthesis, Application) framework organizes for at different stages project. Methods also presented themes: open your mind values worldviews; prioritize relationships (human other-than-human); recognize that regarding natural world valid; remember each partner is unique. Appropriate practices context-dependent, so must listen carefully an identify best

Language: Английский

---

A Resist‐Accept‐Direct (RAD) future for Salmon in Maine and California: Salmon at the southern edge

Fisheries Management and Ecology, Journal Year: 2022, Volume and Issue: 29(4), P. 456 - 474

Published: June 23, 2022

Abstract North American salmon once ranged from ocean waters near the Arctic Circle southward to southern New England on Atlantic and Mexico Pacific. The colonial industrial transformation of rivers oceans have led extirpation or endangered status many populations. Today, chronic anthropogenic stressors interact with climate change, which means that effective conservation must address changes in transformed ecosystems. Conservation goals are designed recover both species their habitats. While seemingly congruent, habitat fish management different timetables due speed climate, habitat, biological processes relative regulatory processes, restoration, project implementation. Resist‐Accept‐Direct (RAD) framework facilitated exploration ideas actions restore suitable conditions for listed under Endangered Species Act at edge. Creative big solutions needed RAD provided a way examine options sustain an era change.

Language: Английский

---

Connecting habitat to species abundance: the role of light and temperature on the abundance of walleye in lakes

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2023, Volume and Issue: 80(2), P. 273 - 286

Published: Jan. 10, 2023

Walleye ( Sander vitreus) are an ecologically important species managed for recreational, tribal, and commercial harvest. prefer cool water low light conditions, therefore changing temperature clarity potentially impacts walleye habitat populations across the landscape. Using survey data collected from 1993 to 2018 312 lakes in Minnesota, we evaluated relationship between thermal-optical relative abundance of small (0–300 mm), medium (300–450 large (450 + mm) walleye. Thermal-optical was positively correlated with but not were more abundant larger, naturally reproducing opposed smaller, stocked lakes. changed 59% since 1980 (26% increasing 33% decreasing) appears be driven primarily by changes thus optical area. Our study provides insights into local regional drivers that influence can used assist fisheries managers setting population goals managing

Language: Английский

---

Depensation in fish recruitment driven by context-dependent interactions with another predator

Fisheries Research, Journal Year: 2023, Volume and Issue: 262, P. 106675 - 106675

Published: Feb. 26, 2023

Language: Английский

---

Managing fisheries within a RAD framework: Concepts and applications

Fisheries Management and Ecology, Journal Year: 2022, Volume and Issue: 29(4), P. 323 - 328

Published: June 23, 2022

AJL is an Associate Editor for Fisheries Management and Ecology. Neither author has any conflicts to declare. No new data were generated in creating this manuscript.

Language: Английский

---