《北美渔业管理杂志》促进渔业管理者之间的交流，重点关注北美，并解决渔业资源的维护、增强和分配问题。它记录了海洋和淡水环境中鱼类和可开发贝类的实用监测和管理计划的发展。贡献与鱼类种群、栖息地和用户的管理有关，以保护和增强鱼类和渔业资源，以造福社会。渔业计划的成功、失败和影响的案例有助于向他人传达实际的管理经验。

The North American Journal of Fisheries Management aims to facilitate communication among fishery managers, with a particular focus on North America, addressing issues related to the conservation, enhancement, and allocation of fishery resources. It documents the development of practical monitoring and management plans for fish and exploitable shellfish in marine and freshwater environments. Contributions relate to the management of fish populations, habitats, and users, with the goal of protecting and enhancing fish and fishery resources for the benefit of society. Case studies of successful and unsuccessful fishery programs provide valuable practical management experiences for others.

《北美渔业管理杂志》旨在促进渔业管理者之间的交流，特别关注北美地区，解决渔业资源的保护、增殖和分配问题。该杂志记录了海洋和淡水环境中鱼类及可开发贝类的实用监测和管理计划的发展。文章内容涉及鱼类种群、栖息地及其用户的管理，旨在保护和增强鱼类及渔业资源，以造福社会。成功与失败的渔业管理案例为他人提供了宝贵的实践经验。

North American Journal of Fisheries Management

Abstract Objective During the COVID‐19 pandemic, 2020 Texas fishing license sales were 25% higher than those in 2019, with over 200,000 first‐time anglers. To better understand this unprecedented cohort of new anglers, we conducted an online survey to examine motivations, behaviors, preferences, and barriers to participation. Methods We invited 60,000 anglers to participate in a self‐administered online survey by e‐mailing an invitation to anglers from the Texas Parks and Wildlife Department customer license database. Result Sixty‐eight percent of survey respondents were new anglers recruited during the COVID‐19 pandemic, while the remaining 32% were retained anglers that began fishing before the pandemic. Compared to the typical retained angler (i.e., White, male, 45–54 years old), new anglers were 1.9 times more likely to be female, twice as likely to fish in freshwater, 2.8 times more likely to be younger than 44 years old, and more likely to identify as Black or African American (1.9 times) or as Asian or Pacific Islander (2.8 times). New anglers were motivated to fish to spend time with family and friends and were less likely than retained anglers to keep the fish that they caught (1.5 times), to fish from a boat (1.5 times), to fish more than an hour from home (1.4 times), and to renew their fishing license (3.9 times). License sales of survey respondents in 2022 showed that 68% of retained anglers purchased another license, while 51% of new anglers purchased another fishing license. Conclusion In summary, new anglers differed significantly from retained anglers in terms of sociodemographics, motivations to fish, preferred amenities at fishing sites, and the challenges they face to continue fishing. To retain these new anglers, novel approaches are likely needed, which may include targeting specific demographics with more beginner information about fishing and directing users to sites with their preferred amenities.

Jennifer Granneman

Hanna Bauer

Kristopher A. Bodine

Daniel J. Daugherty

Nick Guild

J. Warren Schlechte

John B. Taylor

Zack Thomas

COVID‐recruited anglers: Who are they and how can we retain them?

新冠招募的垂钓者：他们是谁以及我们如何留住他们？

Abstract Objective Littoral zone aquatic habitat is an important component of sport fish population dynamics in freshwater lakes and reservoirs and is a primary target of fisheries management actions. However, habitat data for these systems are often minimal or nonexistent due to the cost and time‐consuming nature of traditional aquatic habitat sampling methods. Side‐scan sonar has been identified as a potential tool that can address these limitations, allowing quantification of habitat features over large areas. Side‐scan sonar is available in two forms: recreational (consumer grade) and professional (survey grade). Our goal was to compare these two grades of side‐scan sonar by analyzing their ability to map littoral habitat features in three Ohio reservoirs. Methods We used a Lowrance Active Imaging 3‐in‐1 system (≈US$2000) recreational sonar and an EdgeTech 6205 system (≈$150,000) survey‐grade sonar to collect imagery in the littoral zones of reservoirs. We manually quantified submerged woody debris, standing timber, aquatic vegetation, and benthic substrate in a geographical information system (GIS) using imagery from each sonar system and compared habitat estimates and GIS processing times. We analyzed how differences in image resolution between the two sonar systems affected the level of variation in habitat classification values generated by individual analysts. Result We found small differences in habitat classification values and accuracy between the two sonar systems, and trade‐offs existed in spatial accuracy and ability to image dense vegetation. However, side‐scan data acquisition, postprocessing, and habitat classification were generally less time‐intensive with the recreational Lowrance system than with the survey‐grade EdgeTech system. Unexpectedly, the lower quality Lowrance imagery had less user‐based variation in GIS habitat classification. Conclusion Recreational side‐scan sonar systems such as the Lowrance system provide sufficient imagery resolution, habitat classification values, and accuracy at a lower cost and with less processing time than survey‐grade side‐scan sonar systems and are useful tools for quantifying littoral habitat features in reservoirs.

Taher Fletcher

Michael T. Booth

Jeremy J. Pritt

A comparison of recreational and survey‐grade side‐scan sonar systems in mapping reservoir fish habitat

休闲级与测量级侧扫声呐系统在水库鱼类栖息地测绘中的比较

Abstract Objective Understanding angler responses to fisheries management actions, such as regulation changes, has important implications for the effectiveness and efficacy of such management strategies. We examined whether vehicle counters could provide a relative index of angler effort, and we present a case study demonstrating use of vehicle counters to assess potential changes in angler effort associated with implementation of more restrictive panfish regulations in a subset of Wisconsin lakes. Methods We compared vehicle counts with compulsory creel‐ and game‐camera‐based estimates of angler‐hours and the number of angling parties. During 2016, a series of more restrictive panfish regulations were implemented across 132 Wisconsin lakes. We deployed vehicle counters at a subset of lakes within each regulation type during preregulation (2015–2016) and postregulation (2021–2022) time periods to assess whether the distribution of angler effort (as indexed using vehicle counters) among regulation types shifted in response to regulation implementation. Result At lakes with paired vehicle counters and compulsory creel data, vehicle counts explained 57–72% of the variation in daily angler effort (h) and 65–84% of the variation in daily number of angling parties. Across lakes with paired vehicle counters and game cameras, vehicle counters explained 63–77% of the variation in the number of apparent angling parties depending on how lakes were grouped (i.e., combined or stratified by regulation type); however, effectiveness of vehicle counters for explaining the variation in number of apparent angling parties varied at the individual lake level. We did not observe any systematic shifts in effort that would indicate a redistribution of angler effort in response to panfish regulations. Conclusion Results suggest that given appropriate validation measures, vehicle counters could be used as a cost‐effective tool to index angler effort. Our findings indicate that a localized scale for implementation of specialized regulations may be appropriate given angler behaviors and preferences for Wisconsin panfish.

Daniel J. Dembkowski

Alexander W. Latzka

Zachary S. Feiner

Daniel A. Isermann

Use of vehicle counters to index and evaluate potential shifts in angler effort following implementation of more restrictive panfish regulations in Wisconsin lakes

使用车辆计数器评估威斯康星州湖泊实施更严格河鲈管理规定后垂钓者努力程度潜在变化的索引与评价

Abstract Objective In 2017, we began a 5‐year mark–recapture study to estimate apparent survival of Walleye Sander vitreus and angler exploitation in Lake Sharpe, South Dakota, and inform management strategies for this fishery. The study revealed substantial downstream emigration of Walleye; therefore, we also examined the influence of emigration on apparent mortality. Methods We estimated Walleye apparent survival using the Seber parameterization of the dead recovery model. In our models, we included factors influencing voluntary fish release, as well as harvest restrictions, tagging location, and year. We used a multistate Markov model to estimate emigration in relation to Walleye total length, sex, and tagging location, as well as annual reservoir discharge. The exploitation and emigration estimates informed our interpretations of annual Walleye apparent survival. Result Apparent survival patterns were explained by an interaction between Walleye length and a minimum harvest length restriction. Apparent survival was lower during July and August, when the minimum harvest length limit was suspended, and results suggest that anglers were willing to release preferred sizes (≥508 mm) when able to harvest smaller (&lt;381 mm) Walleye. Annual apparent survival, exploitation, and emigration estimates ranged between 15% and 47%, 8% and 25%, and 11% and 28%, respectively. Emigration was influenced by tagging location and annual discharge: increasing with proximity to Big Bend dam and during high annual flows. Although years with high exploitation or emigration corresponded to years with low apparent survival, estimates did not explain the magnitude of mortality or emigration indicated by survival models. Conclusion Our results revealed that harvest–release decisions by Walleye anglers in Lake Sharpe are primarily influenced by regulations, although exploitation was not a significant source of mortality. Annual patterns in apparent survival indicate high mortality or emigration. Continued investigations into immigration and emigration and sources of mortality of Lake Sharpe Walleye are warranted to better inform management strategies for the fishery.

Laurel H. Sacco

Mark J. Fincel

Cameron W. Goble

Tanner Davis

Steven R. Chipps

Effects of exploitation and emigration on apparent survival of Walleye in Lake Sharpe, South Dakota

利用和迁出对南达科他州夏普湖白眼鱼表观存活率的影响

Abstract Objective Blue Catfish Ictalurus furcatus populations introduced into Kansas reservoirs in the past few decades have supported fisheries during the 21st century that have rapidly gained popularity among anglers. The increased importance of these fisheries has prompted questions about the status of populations, resilience to overfishing, and appropriate harvest management strategies. The primary objectives of this study were to quantify the dynamics of four Blue Catfish populations in Kansas impoundments, identify susceptibility to angler catch and harvest, and evaluate modeled population responses to harvest regulation. Methods We coupled capture–recapture efforts and a randomized sample design using low‐frequency electrofishing to estimate population characteristics of the four Blue Catfish populations. We also estimated age and growth parameters from each population to characterize dynamic rate functions. Angler tag return data were summarized over a period of 1 year from each fishery to evaluate Blue Catfish susceptibility to angler catch and harvest. Finally, we consolidated these data into harvest regulation models to estimate the population response under varied harvest regimes. Result Estimated densities of stock‐length (≥300 mm total length) Blue Catfish varied from 2.79 to 20.14 individuals/ha. Growth was variable, with individuals expected to reach quality length (≥510 mm total length) as early as age 4 and as late as age 9. The largest fish in each population were more vulnerable to angler capture, although harvest was low for all sizes of fish. Harvest regulation models indicated that populations were resilient to increased exploitation under all scenarios, with a limited risk of growth overfishing or recruitment overfishing. Conclusion Blue Catfish populations in Kansas reservoirs exhibit different dynamics but demonstrate resilience to overfishing. The largest individuals in populations are much more vulnerable to angler catch than smaller fish, but the risk of overharvest appears mitigated by angler self‐regulation.

Ben C. Neely

Ernesto Flores

Craig M. Johnson

Jeff D. Koch

Brett T. Miller

Justin L. Morrison

Vanessa Salazar

Ely N. Sprenkle

Characteristics of four Blue Catfish fisheries with implications for harvest management

四种蓝鲶渔业特征及其对捕捞管理的启示

Abstract Objective Walleye Sander vitreus is an important species that has been widely introduced outside of its native distribution. The goal of this study was to assess the effects of an established Walleye population in the Lake Pend Oreille (LPO) system, Idaho. Methods Food habits of Walleyes were described using stomach contents and stable isotopes (δ 15 N, δ 13 C). Trophic structure of the LPO system's food web was identified using stable isotopes. Annual consumption by Walleyes of important prey items was estimated using a bioenergetics model. Result Walleyes consumed a diversity of prey items, including macroinvertebrates and fishes. Kokanee Oncorhynchus nerka , the most frequently consumed prey item, occurred in 23% of all Walleye diets. Combined, native cyprinids and catostomids occurred in 31% of all Walleye stomachs. Select taxa (e.g., native cyprinids, kokanee) were consistently consumed by Walleyes across seasons, regions, and cohorts, whereas other taxa (e.g., Westslope Cutthroat Trout O. lewisi , Smallmouth Bass Micropterus dolomieu ) were consumed inconsistently. Stable isotope analysis suggested that Walleyes occupied similar trophic positions as other top‐level piscivores in the system . As Walleye age increased, δ 15 N increased and δ 13 C decreased, indicating increased consumption of pelagic prey resources and prey at higher trophic positions. The estimated biomass of kokanee consumed annually by Walleyes was 27,121 kg (95% confidence interval = 9178–61,603). Comparatively, native cyprinids represented about 46% of the total biomass of kokanee consumed by Walleyes, whereas native catostomids represented about 11% and native salmonids represented about 15% of the total biomass of kokanee consumed by Walleyes. Conclusion This study revealed that Walleyes consumed various fishes across the LPO system. Although kokanee were the most frequently consumed prey item, native cyprinids and catostomids (combined) occurred at similar proportions. This study contributes to our growing knowledge of the effects of nonnative Walleyes on important salmonids and native fishes in western systems.

Susan E. Frawley

Matthew P. Corsi

Andrew M. Dux

Ryan S. Hardy

Michael C. Quist

Food habits of nonnative Walleyes in Lake Pend Oreille, Idaho

爱达荷州彭德奥瑞尔湖中非本地狗鱼的饮食习惯

Abstract Objective Muskellunge Esox masquinongy fisheries in Ohio are almost exclusively catch and release. Catch and release is expected to benefit anglers via recaptures of previously caught fish (i.e., recycling). We used mark–recapture techniques to evaluate catch‐and‐release dynamics over multiple years in two stocked Muskellunge fisheries in Ohio. Methods Muskellunge were collected and tagged each spring by the Ohio Department of Natural Resources, Division of Wildlife (ODNR‐DOW) at Clearfork Reservoir (1991–2006) and Leesville Lake (2016–2022). A total of 4139 Muskellunge were tagged, of which 38% ( n = 1575) were recaptured at least once by either the ODNR‐DOW or anglers. A total of 252 anglers reported 1339 catches of tagged fish. Multistate modeling was used to estimate survival and transition probabilities across years for the following marked fish states: at large (L, ODNR‐DOW marked fish not reported caught by anglers); catch and release (C, those fish reported caught and released by anglers); and recycled (R, catch‐and‐release fish caught and reported by anglers again). Transition probabilities between states L to C and C to R estimated Muskellunge catch and release and recycling, respectively. Result Raw angler catch reports indicated that intra‐annual recycling was rare, with the median time between recapture events exceeding a year. Modeled annual survival probability of L fish at Clearfork Reservoir and Leesville Lake was 0.67 and 0.87, respectively. About a quarter of these fish were caught and released by anglers at both reservoirs. Survival of C fish was lower than L fish at both reservoirs (Clearfork Reservoir = 0.58; Leesville Lake = 0.67), suggesting a “catch‐and‐release effect” on survival. Joint probability of catch‐and‐release fish surviving and being recycled annually was 0.24 and 0.23 for Clearfork Reservoir and Leesville Lake, respectively. Conclusion Integration of survival and catch probabilities over the long‐term provides a comprehensive evaluation of catch‐and‐release dynamics. Estimates suggest that post‐catch‐and‐release survival and probability of recycling may be lower than anticipated, which may have implications for managing Muskellunge fisheries and angler expectations.

Kevin S. Page

Curtis P. Wagner

Edward Lewis

Using mark–recapture techniques to evaluate catch and release, recycling, and associated survival probabilities of stocked Muskellunge at two Ohio reservoirs

使用标记重捕技术评估俄亥俄州两个水库中放养的北美狗鱼捕获释放、再捕获及其相关存活概率

Abstract Objective Understanding factors influencing growth is vital to effective management of fish populations. This study investigated potential factors influencing growth of an established nonnative population of Walleyes Sander vitreus in the Lake Pend Oreille system in northern Idaho. Methods We used relative growth index to describe growth of Walleyes relative to populations across North America. Mixed‐effects modeling was used to relate growth to abiotic (i.e., mean summer water temperature, river inflow) and biotic (i.e., kokanee Oncorhynchus nerka abundance and biomass; opossum shrimp Mysis diluviana density) variables. Models were ranked using Akaike's information criterion corrected for small sample size. Individual variability in growth was related to diet represented by stable isotopes (i.e., δ 15 N, δ 13 C) using linear regression for age‐1, age‐2, age‐3, and age‐5 individuals. Subsequently, for each age‐class, we evaluated differences in δ 15 N and δ 13 C between fast‐growing (i.e., 75th and higher percentiles of growth) and slow‐growing (i.e., 25th and lower percentiles of growth) individuals. Result Walleyes grew fast relative to other populations. Growth of Walleyes was positively associated with temperature as well as abundance and biomass of kokanee; growth was unrelated to river inflow and opposum shrimp density. The top model indicated that growth of Walleyes was related to temperature and kokanee abundance. An equally plausible model explaining growth consisted of only temperature. Generally, fast‐growing Walleyes exhibited higher δ 15 N than slow‐growing individuals. Similarly, δ 13 C was more depleted in the fast‐growing individuals for all ages except age 1. This suggests that fast‐growing individuals likely consumed prey items at higher trophic positions and fast‐growing Walleyes (except age 1) used higher proportions of pelagic prey items. Conclusion This study showed that kokanee abundance and temperature likely influenced growth of Walleyes in the Lake Pend Oreille system. Additionally, variability in growth was apparently related to variability in diet, particularly for age‐1 Walleyes.

Abiotic and biotic factors related to growth of nonnative Walleyes in Lake Pend Oreille, Idaho

与爱达荷州庞多雷湖外来物种白斑狗鱼生长相关的非生物和生物因素

Abbreviation	N. Am. J. Fish. Manag.
Journal Impact	1.34
Quartiles(Global)	FISHERIES(Q3)

ISSN	0275-5947, 1548-8675
h-index	82

Publication Information	Publisher: John Wiley & Sons Inc.，Publishing cycle: Quarterly，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 1981，Proportion of original research papers: 97.25%，Self Citation Rate:15.40%， Gold OA Rate: 18.00%
Average review cycle	网友分享经验：平均2月
Average recruitment ratio	网友分享经验：约50%

North American Journal of Fisheries Management

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COVID‐recruited anglers: Who are they and how can we retain them?

A comparison of recreational and survey‐grade side‐scan sonar systems in mapping reservoir fish habitat

Use of vehicle counters to index and evaluate potential shifts in angler effort following implementation of more restrictive panfish regulations in Wisconsin lakes

Effects of exploitation and emigration on apparent survival of Walleye in Lake Sharpe, South Dakota

Characteristics of four Blue Catfish fisheries with implications for harvest management

Food habits of nonnative Walleyes in Lake Pend Oreille, Idaho

Using mark–recapture techniques to evaluate catch and release, recycling, and associated survival probabilities of stocked Muskellunge at two Ohio reservoirs

Abiotic and biotic factors related to growth of nonnative Walleyes in Lake Pend Oreille, Idaho

COVID‐recruited anglers: Who are they and how can we retain them?

A comparison of recreational and survey‐grade side‐scan sonar systems in mapping reservoir fish habitat