Non‐native, Asian carps bighead Hypophthalmichthys nobilis and silver molitrix have been present in the Illinois River since early 1990s. The Long‐Term Resource Monitoring Program (LTRMP) has collecting routine monitoring of La Grange Reach, River, 1995 1998, respectively. Despite variable recruitment, abundance biomass increased 2000, as evidenced by commercial landings, now dominate fish community on Reach. Previous research suggests dietary overlap among two native fishes, gizzard shad...

Abstract The Safe Operating Space ( SOS ) of a recreational fishery is the multidimensional region defined by levels harvest, angler effort, habitat, predation and other factors in which sustainable into future. boundaries exhibit trade‐offs such that decreases harvest can compensate to some degree for losses increases increasing value fishing time anglers. Conversely, high be sustained if habitat intact, low, effort moderate. approach recognizes limits several dimensions: at overly loss,...

The habitat concept in inland fisheries has been less studied than wildlife ecology. Since 1950, the cumulative number of publications about “freshwater or and management” 60%–95% those considering “habitat management.” “marine, river, stream also generally exceeded for “lake We provide a perspective comparing fish management systems highlight lessons from ecology that could benefit fisheries. reason become widespread accepted because humans share habitats with positive/negative responses to...

Recreational fisheries are valued at $190B globally and constitute the predominant way in which people use wild fish stocks developed countries, with inland systems contributing main fraction of recreational fisheries. Although thought to be highly resilient self-regulating, rapid pace environmental change is increasing vulnerability these overharvest collapse. Here we directly evaluate angler harvest relative biomass production individual for a major fishery. Using an extensive 28-y dataset...

As lakeshores are developed, property owners often thin the riparian forest and remove older logs or fallen limbs from adjacent littoral zone. This practice alters fish habitat produces unknown ecosystem changes. To assess potential effects on communities food web interactions, we removed more than 75% of coarse woody (CWH) treatment basin Little Rock Lake, Wisconsin, while leaving reference unaltered. Prior to CWH removal, webs in both basins were similar dominated by aquatic prey. After...

Abstract – We used a longline tethering method to examine the relationship between prey refugia, body morphology and location magnitude of predation mortality within an individual lake among three lakes that differed in coarse woody habitat (CWH) aquatic macrophyte abundances. Predation events were lowest and/or CWH refuges, peaked at or just beyond refuge edge declined pelagic portions lakes. risk was positively correlated with abundance littoral refuge. In contrast, zone negatively...

ABSTRACT Long‐term ecological monitoring is essential to gain an understanding of the interaction between spatial and temporal patterns variability. The goals our study were test for trends in (1) overall fish catches; (2) native non‐native species richness relative abundance; (3) assemblages over time using greater than 50 years offish population data collected from Illinois River. Fish increased community analyses revealed changes composition a dominated by common carp ( Cyprinus carpio )...

Research testing for the effects of climate change on lentic fishes has focused changing thermal and dissolved oxygen regimes, but often overlooked potential influences altered lake levels littoral habitat availability species interactions. Natural structures such as coarse woody (CWH) can be critical to prey production, refuge, spawning. Drought-driven level declines may strand these above waterline thereby remove them from zones. A prolonged drought in northern Wisconsin, USA, allowed us...

ABSTRACT Invasive Asian Carp are threatening to enter Lake Michigan through the Chicago Area Waterway System, with potentially serious consequences for Great Lakes food webs. Alongside efforts keep these fishes from entering electric barriers, state of Illinois initiated a fishing program aimed at reducing their densities intensive commercial exploitation on River. In this study, we explore prospects “collapse” in River fishing. Based meta‐analysis demographic data, developed dynamic...

Catch-and-release (CR) has become a pervasive practice and "social norm" with anglers for some inland recreational fisheries. This been promoted fish conservation to meet angler manager desires of greater abundances, catch rates, trophy growth potential. in north-temperate fisheries was reviewed over time documented the subsequent responses populations recruitment, abundance, size structure, growth, potential primarily focusing on black bass Micropterus spp., muskellunge Esox masquinongy,...

Managing fisheries through rapid environmental change requires diverse approaches for identifying and adapting to novel ecological conditions. For the Wisconsin Ceded Territory, we calculated 473 adult walleye (Sander vitreus) production (P), biomass (B), P/B estimates 1990–2012. Frequency distributions statistics were right-skewed, indicating fishery is generally dominated by low populations. Mean P, B, significantly elevated in natural recruitment (NR) lakes compared with combination (NR +...

Abstract Decision‐makers in inland fisheries management must balance ecologically and socially palatable objectives for ecosystem services within financial or physical constraints. Climate change has transformed the potential range of available. The Resist‐Accept‐Direct (RAD) framework offers a foundation responding to climate‐induced modification; however, trajectories current practices be understood improve future decisions. Using Wisconsin's diverse as case study, strategies recreational...

Declining body size is believed to be a universal response climate warming and has been documented in numerous studies of marine anadromous fishes. The Salmonidae are family coldwater fishes considered among the most sensitive species warming; however, whether shrinking holds true for freshwater salmonids yet examined at broad spatial scale. We compiled observations individual fish lengths from long-term surveys across Northern Hemisphere 12 used linear mixed models test temporal trends...

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...

Abstract Diel vertical migrations are common among many aquatic species and often associated with changing light levels. The underlying mechanisms generally attributed to optimizing foraging efficiency or growth rates avoiding predation risk (μ). objectives of this study were (1) assess seasonal interannual changes in migration patterns three trophic levels the Lake Superior pelagic food web (2) examine observed variability by using models foraging, growth, μ. Our results suggest that...

Bighead (Hypophthalmichthys nobilis [Richardson, 1845]) and silver (H. molitrix [Valenciennes, 1844]) carps (collectively, Asian carp) have invaded the Mississippi River Basin successfully established populations in Illinois River, where they negatively influenced native fishes now pose an imminent threat to invading Lake Michigan through Chicago Sanitary Ship Canal. Sound-bubble-strobe light barrier (SBSLB) technologies may potential slow carp range expansions; for example, a sound-bubble...

Raabe JK, VanDeHey JA, Zentner DL, Cross TK, Sass GG. 2019. Walleye inland lake habitat: considerations for successful natural recruitment and stocking in North Central America. Lake Reserve Manage. 36:335–359. (Sander vitreus) occur naturally or through extensive introductions many lakes (i.e., non-Laurentian Great Lakes) throughout Persistence of walleye these systems is influenced by factors including habitat, species interactions, exploitation, stocking. Managers have expressed concerns...

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...

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...

ABSTRACT Black bullhead Ameiurus melas are an environmentally tolerant fish that often the target of population‐level management efforts due to overabundance and potential negative influences on sport fishes. Descriptions black growth life history have been limited in part challenges age estimation. Pectoral fin spines validated as estimation structures for other ictalurids, but not bullhead. We evaluated precision pectoral spine whole otolith estimates from a northern Wisconsin lake. Age...