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,...

Maternal influences on age-0 walleye (Sander vitreus (Mitchill, 1818)) recruit abundance and survival from egg to fall were observed in Escanaba Lake, Wisconsin, 1957–2015. Annual production best explained variation recruitment, compared with female relative abundance, adult (sexes combined). Age-0 recruitment was not significantly correlated any temperature metric tested or our index of yellow perch (Perca flavescens 1814)) abundance. Survival positively the percent contribution large...

Abstract Inland fisheries face increasing threats to their sustainability. Despite speculation that depensation may exacerbate the effects of stressors on population resiliency, has not been empirically explored in freshwater fisheries. Declining productivity Walleye Sander vitreus populations northern Wisconsin foreshadows an underlying change naturally reproduced juvenile survival. We used long-term stock and recruitment data from lakes Ceded Territory quantify density-dependent trends...

Abstract Harvest in walleye Sander vitreus fisheries is size‐selective and could influence phenotypic traits of spawners; however, contributions individual spawners to recruitment are unknown. We used parentage analyses using single nucleotide polymorphisms test whether parental were related the probability offspring survival Escanaba Lake, Wisconsin. From 2017 2020, 1339 adults 1138 juveniles genotyped 66% assigned at least one parent. Logistic regression indicated reproductive success...

Abstract Assessment of the Walleye Sander vitreus angling and tribal spearing fisheries in Ceded Territory Wisconsin ( CTWI ) is critical for sustainability this resource. Key to these assessments an understanding harvest demographics, exploitation, catch efficiency, relationships between or adult density. We characterized size distribution mean length harvested Walleyes, harvest, exploitation rate, (angling) (spearing) rate both during 1990–2015. Then, we evaluated rates relation density...

Sass GG, Shaw SL, Rooney TP, Rypel AL, Raabe JK, Smith QC, Hrabik TR, Toshner ST. 2019. Coarse woody habitat and glacial lake fisheries in the Midwestern United States: knowns, unknowns, experiment to advance our knowledge. Lake Reserv Manage. 35:382–395.Coarse (CWH) additions have increased popularity lakes (i.e. kettle lakes) of States. However, most enhancements not been treated as deliberate experiments test for fish aquatic ecosystem responses. Whole-lake CWH removal studies shown...

Abstract In response to declines in coarse woody habitat (CWH) and fish productivity natural lakes reservoirs, agencies stakeholders have used artificial enhancements slow or reverse the effects of loss from aging shoreline development. Given that reservoirs differ physical biological conditions could influence enhancement outcomes, a framework is needed guide management expectations for CWH replacement under different ecosystem contexts. We review contexts structural use preliminary results...

Stock reproductive potential informs population dynamics and response to harvest. Indices of body condition, like relative weight (W r ), may indicate individual energetic state provide a mechanistic link between spawning stock traits recruitment. We tested for relationships among W three female size classes (381–456, 457–557, ≥558 mm total length), traits, age-0 recruitment using data from 92 walleye (Sander vitreus) populations in the Ceded Territory Wisconsin during 1989–2015...

Quantified were the age, growth, mortality and reproductive structure of lake sturgeon (Acipenser fulvescens) collected in US Canadian waters Namakan Reservoir. The hypotheses tested that (i) age growth Reservoir would differ by sex stage maturity, (ii) relative strength year-classes reservoir be affected environmental variables. To quantify population, existing data was used from a multi-agency database containing information on all sampled 2004 to 2009. Lake Minnesota Ontario using...

Abstract The behavior of anglers targeting Muskellunge Esox masquinongy in Wisconsin has changed over time from being harvest oriented to catch‐and‐release oriented. Our objectives were use the long‐term tagging data set (1956–2016) available on population Escanaba Lake, Wisconsin, characterize sex‐specific age structure, length at age, and survival relation a potential change angler harvest. We hypothesized that (1) time, (2) structure have harvest, (3) annual changes A breakpoint analysis...

Managing fisheries in a changing socio-ecological environment may require holistic approaches for identifying and adapting to novel ecosystem dynamics. Using 32 years of Ceded Territory Wisconsin (CTWI) walleye ( Sander vitreus) data, we estimated production P), biomass B), turnover P/B), yield Y), over Y/P) tested hyperstability yield. Most CTWI populations showed low P B, Y/P < 1 . Yet, overharvest > 1) was prevalent among recruitment-based management (natural recruitment (NR),...

Abstract Sex differentiation in teleost fish is complex and often dictated by genetics, environmental conditions, population density during critical embryonic/larval development periods. Walleye Sander vitreus have a long propagation stocking history, sex ratios of hatchery‐reared been variable, typically skewed towards males, potentially influenced temperature. In contrast to previous fry small fingerling Wisconsin water bodies, the Initiative 2013 focused on production extended growth...

Abstract We evaluated the influence of sex and reproductive condition on seasonal distribution movement patterns Lake Sturgeon Acipenser fulvescens in Namakan Reservoir, Minnesota–Ontario. Blood samples were collected from 133 prior to spawning plasma concentrations testosterone estradiol‐17ß analyzed using radioimmunoassay. Steroid used determine stage each sturgeon. A subset 60 adults implanted with acoustic transmitters 2007 2008. Movement was monitored an array 15 stationary receivers...

Abstract Understanding how fish populations respond to exploitation is critical for sustainable fisheries management. Walleye Sander vitreus have been exploited by tribal spear and angling in the Ceded Territory of Wisconsin ( CTWI ) since 1985, harvest individual lakes has regulated using a 35% adult limit reference point 1990. We conducted annual experiment (1993–1997: baseline at ~13%; 1998–2008: exploitation) on Big Crooked Lake, Wisconsin, test responses adult, male, female, age‐0,...

Abstract The relative abundance of the largest size‐classes individuals within a fish population has an important influence on recruitment success. Fishing regulations with basis in size (e.g., minimum‐length limits) can directly impact these larger and thus potentially recruitment. We analyzed whether exploited native Brown Trout Salmo trutta populations was affected via extraction large (>220 mm, i.e., limit). study replicated temporally (2007–2009) spatially across seven recreational...

Abstract Fish populations that undergo heavy exploitation and those for which the act of fishing can influence individual brood success are at risk recruitment effects due to angling. The angling brood‐guarding male black bass Micropterus spp. has been shown decrease success, although there is no evidence a loss broods population‐level impacts. Therefore, some level compensation may juvenile survival. We sought measure form stock–recruit relationship species, Florida Largemouth Bass M....

Abstract Objective Fish movements and distributions throughout an ecosystem are important for understanding ecological interactions, conservation, management. Coarse woody habitat (CWH) additions a popular enhancement tool that can influence of fishes; however, behavioral responses in relation to CWH understudied. The objectives our study were test changes use Muskellunge Esox masquinongy , Smallmouth Bass Micropterus dolomieu Walleye Sander vitreus small inland northern lake over 3 years...

Population size structure and maximum of managed sportfish populations are dictated by abiotic, biotic, ecosystem, anthropogenic influences. In their native ranges northern Wisconsin, muskellunge (Esox masquinongy) cisco (Coregonus artedi) co-adapted cool- cold-water species where presence may influence population muskellunge. We tested whether indices (length-frequency distributions, proportional distribution), mean length, length differed when were present or absent in Ceded Territory...