Christopher W. Burns, Pascale Gibeau, David Robichaud, Cameron McCulloch, Julio Novoa, Krystal Lockert
Abstract Objective The Fraser River in British Columbia, Canada, historically supported productive Indigenous, recreational, and commercial fisheries for Eulachon Thaleichthys pacificus . Although Eulachon spend most of their lives in the marine environment, they spawn in freshwater and it is hypothesized that habitat degradation in the Fraser River has contributed to population decline. A greater understanding of Eulachon life history strategies is necessary to develop species recovery strategies. The purpose of this study was to provide insight into population demographics, migration timing, residence time, travel speed and distance, and movement patterns of Eulachon traveling in the Fraser River by conducting index netting and acoustic telemetry. Methods In total, 244 Eulachon were acoustically tagged at the mouth of the Fraser River, and their movements were monitored using acoustic receivers in the lowermost 70 km of the Fraser River and in the Pitt River (a tributary to the Fraser River) over a 2‐year period. Result Tagged Eulachon displayed heterogeneous movement behaviors and a protracted migration period between February and May. Eulachon index gill netting revealed three discrete migration groups matching traditional ecological knowledge from Indigenous knowledge holders. There were shifts in population demographics, with sex ratios changing from predominately males to females throughout the migration. Residence time within the estuarine salt wedge and river was short. Upstream travel speeds varied significantly between sexes and slowed as fish traveled upstream. Conclusion Overall, Eulachon travel speeds, travel distances, and residence times, along with size and sex effects, provided insights into movement patterns. These results will increase our understanding of sex‐specific risks related to instream disturbance, harvest, and predation and will inform management decisions regarding protection of critical habitats. The observed patterns highlight the need for stock assessment methods to consider all discrete migration groups and will assist in prioritizing species recovery efforts.
{"title":"Eulachon migration patterns in the lower Fraser River revealed through acoustic telemetry","authors":"Christopher W. Burns, Pascale Gibeau, David Robichaud, Cameron McCulloch, Julio Novoa, Krystal Lockert","doi":"10.1002/tafs.10428","DOIUrl":"https://doi.org/10.1002/tafs.10428","url":null,"abstract":"Abstract Objective The Fraser River in British Columbia, Canada, historically supported productive Indigenous, recreational, and commercial fisheries for Eulachon Thaleichthys pacificus . Although Eulachon spend most of their lives in the marine environment, they spawn in freshwater and it is hypothesized that habitat degradation in the Fraser River has contributed to population decline. A greater understanding of Eulachon life history strategies is necessary to develop species recovery strategies. The purpose of this study was to provide insight into population demographics, migration timing, residence time, travel speed and distance, and movement patterns of Eulachon traveling in the Fraser River by conducting index netting and acoustic telemetry. Methods In total, 244 Eulachon were acoustically tagged at the mouth of the Fraser River, and their movements were monitored using acoustic receivers in the lowermost 70 km of the Fraser River and in the Pitt River (a tributary to the Fraser River) over a 2‐year period. Result Tagged Eulachon displayed heterogeneous movement behaviors and a protracted migration period between February and May. Eulachon index gill netting revealed three discrete migration groups matching traditional ecological knowledge from Indigenous knowledge holders. There were shifts in population demographics, with sex ratios changing from predominately males to females throughout the migration. Residence time within the estuarine salt wedge and river was short. Upstream travel speeds varied significantly between sexes and slowed as fish traveled upstream. Conclusion Overall, Eulachon travel speeds, travel distances, and residence times, along with size and sex effects, provided insights into movement patterns. These results will increase our understanding of sex‐specific risks related to instream disturbance, harvest, and predation and will inform management decisions regarding protection of critical habitats. The observed patterns highlight the need for stock assessment methods to consider all discrete migration groups and will assist in prioritizing species recovery efforts.","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135254566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Spencer VanderBloemen, L. Miranda, G. Sass, Michael Colvin, N. Faucheux
The Tennessee River basin and its cascade of reservoirs are home to some of the most diverse freshwater fish assemblages in the world. This unique system is threatened by the ongoing invasion of Silver Carp Hypophthalmichthys molitrix and Bighead Carp H. nobilis, hereafter bigheaded carps. Bigheaded carps may directly compete for food resources with native clupeid species such as Gizzard Shad Dorosoma cepedianum, and this potential interaction could have damaging ecological and economic consequences. High relative abundances of Gizzard Shad are crucial to the Tennessee River food web and associated fisheries because of their role as a forage base for piscivorous species. We analyzed a collection of annual gillnetting and electrofishing data spanning from 1990 to 2017, to test whether Gizzard Shad relative abundances have changed in Tennessee River reservoirs since the arrival of bigheaded carps. Our analyses indicated that Gizzard Shad abundances have been declining but were already declining prior to the arrival of bigheaded carps in the Tennessee River. At this stage in the invasion, we could not attribute a cause‐and‐effect to the inverse relationship between Gizzard Shad and bigheaded carps, but we advise continued monitoring of indicators of harmful interactions.
田纳西河流域及其瀑布般的水库是世界上最多样化的淡水鱼群的家园。这一独特的生态系统正受到持续入侵的鲢鱼(Hypophthalmichthys molitrix)和鳙鱼(high head Carp H. nobilis)的威胁。鳙鱼可能直接与本地棘鱼(Gizzard Shad Dorosoma cepedianum)争夺食物资源，这种潜在的相互作用可能会造成破坏性的生态和经济后果。高相对丰度的沙鱼对田纳西河食物网和相关渔业至关重要，因为它们是食鱼物种的饲料基地。我们分析了1990年至2017年的年度刺网和电钓数据，以测试自鳙鱼到来以来，田纳西河水库中沙棘鱼的相对丰度是否发生了变化。我们的分析表明，沙棘鱼的丰度一直在下降，但在鳙鱼到达田纳西河之前就已经下降了。在入侵的这个阶段，我们不能将沙鱼和鳙鱼之间的因果关系归因于负相关关系，但我们建议继续监测有害相互作用的指标。
{"title":"Influence of Invasive Bigheaded Carps on Abundance of Gizzard Shad in the Tennessee River","authors":"Spencer VanderBloemen, L. Miranda, G. Sass, Michael Colvin, N. Faucheux","doi":"10.1002/tafs.10442","DOIUrl":"https://doi.org/10.1002/tafs.10442","url":null,"abstract":"The Tennessee River basin and its cascade of reservoirs are home to some of the most diverse freshwater fish assemblages in the world. This unique system is threatened by the ongoing invasion of Silver Carp Hypophthalmichthys molitrix and Bighead Carp H. nobilis, hereafter bigheaded carps. Bigheaded carps may directly compete for food resources with native clupeid species such as Gizzard Shad Dorosoma cepedianum, and this potential interaction could have damaging ecological and economic consequences. High relative abundances of Gizzard Shad are crucial to the Tennessee River food web and associated fisheries because of their role as a forage base for piscivorous species. We analyzed a collection of annual gillnetting and electrofishing data spanning from 1990 to 2017, to test whether Gizzard Shad relative abundances have changed in Tennessee River reservoirs since the arrival of bigheaded carps. Our analyses indicated that Gizzard Shad abundances have been declining but were already declining prior to the arrival of bigheaded carps in the Tennessee River. At this stage in the invasion, we could not attribute a cause‐and‐effect to the inverse relationship between Gizzard Shad and bigheaded carps, but we advise continued monitoring of indicators of harmful interactions.","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50882821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Colorado River has undergone substantial anthropogenic modifications, and a suite of nonnative species have been introduced since the 1800's, consequently native fish communities are severely imperiled. We examined temporal patterns in fish community structure in Lake Mohave (i.e., lower Colorado River basin) using results from bi‐annual (spring and autumn) trammel net monitoring over 40 years from 1980 to 2020. Specifically, we examined 1) long‐term abundance and richness trends and 2) the trajectory of fish community structure in multivariate space to assess stability and turnover. Nonnative fishes were established prior to sampling, precluding the ability to determine historical fish community structure. Bonytail Gila elegans and Razorback Sucker Xyrauchen texanus were the only two remaining native fishes, and both declined precipitously in abundance through time. However, a repatriation program initiated in 1991 prevented Razorback Sucker from extirpation, while reintroduction efforts for Bonytail have failed. Both wild populations are gone. Total catch per unit effort showed a negative relationship from 1980 to 2020, whereas total species richness showed no relationship. Long‐term abundance trends at the species‐level indicated three nonnative species (i.e., Gizzard Shad Dorosoma cepedianum, Yellow Bullhead Ameiurus natalis, and Smallmouth Bass Micropterus dolomieu) increased, nine decreased, and three showed no significant relationship. Fish community composition exhibited low stability and moderate turnover, and shifted directionally through time in multivariate space, with the formation of three clusters, possibly indicating alternative states. The contemporary fish community shows little resemblance to the endemic ichthyofauna that historically occupied the Colorado River, and the Razorback Sucker is the only remaining native species due to recovery efforts. Continued adaptive management will be required to preserve the most genetically diverse Razorback Sucker population in the Colorado River system, especially while co‐existing with an unstable nonnative fish community.
{"title":"Long‐term patterns of fish community structure and decline in native species in a Colorado River reservoir, Arizona and Nevada","authors":"A. Burgad, B. Kesner, P. Marsh","doi":"10.1002/tafs.10437","DOIUrl":"https://doi.org/10.1002/tafs.10437","url":null,"abstract":"The Colorado River has undergone substantial anthropogenic modifications, and a suite of nonnative species have been introduced since the 1800's, consequently native fish communities are severely imperiled. We examined temporal patterns in fish community structure in Lake Mohave (i.e., lower Colorado River basin) using results from bi‐annual (spring and autumn) trammel net monitoring over 40 years from 1980 to 2020. Specifically, we examined 1) long‐term abundance and richness trends and 2) the trajectory of fish community structure in multivariate space to assess stability and turnover. Nonnative fishes were established prior to sampling, precluding the ability to determine historical fish community structure. Bonytail Gila elegans and Razorback Sucker Xyrauchen texanus were the only two remaining native fishes, and both declined precipitously in abundance through time. However, a repatriation program initiated in 1991 prevented Razorback Sucker from extirpation, while reintroduction efforts for Bonytail have failed. Both wild populations are gone. Total catch per unit effort showed a negative relationship from 1980 to 2020, whereas total species richness showed no relationship. Long‐term abundance trends at the species‐level indicated three nonnative species (i.e., Gizzard Shad Dorosoma cepedianum, Yellow Bullhead Ameiurus natalis, and Smallmouth Bass Micropterus dolomieu) increased, nine decreased, and three showed no significant relationship. Fish community composition exhibited low stability and moderate turnover, and shifted directionally through time in multivariate space, with the formation of three clusters, possibly indicating alternative states. The contemporary fish community shows little resemblance to the endemic ichthyofauna that historically occupied the Colorado River, and the Razorback Sucker is the only remaining native species due to recovery efforts. Continued adaptive management will be required to preserve the most genetically diverse Razorback Sucker population in the Colorado River system, especially while co‐existing with an unstable nonnative fish community.","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48705452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"What Makes Anglers Happy: A Sentiment Analysis of Walleye Angler Forums in the United States","authors":"Kirsten Vacura, Edward Camp, P. Venturelli","doi":"10.1002/tafs.10436","DOIUrl":"https://doi.org/10.1002/tafs.10436","url":null,"abstract":"","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45049336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Stray Compositions of Hatchery‐Origin Chinook Salmon and Steelhead in Natural Spawning Populations of the Upper Columbia Watershed","authors":"T. Pearsons, Mark Miller","doi":"10.1002/tafs.10434","DOIUrl":"https://doi.org/10.1002/tafs.10434","url":null,"abstract":"","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42497110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Using state‐space models to estimate recreational angling effort and infer processes that regulate angler dynamics","authors":"Joshua L. McCormick, John W. Heckel","doi":"10.1002/tafs.10432","DOIUrl":"https://doi.org/10.1002/tafs.10432","url":null,"abstract":"","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46075097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Colin Laubach, D. DeVries, R. Wright, David L. Smith
{"title":"The effect of temperature and acute hypoxia/hyperoxia exposure on swimming performance and kinematics of Freshwater Drum","authors":"Colin Laubach, D. DeVries, R. Wright, David L. Smith","doi":"10.1002/tafs.10414","DOIUrl":"https://doi.org/10.1002/tafs.10414","url":null,"abstract":"","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42722479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of habitat and other factors on Largemouth Bass abundance in Lake Okeechobee, Florida","authors":"C. Hanlon, A. Jordan","doi":"10.1002/tafs.10412","DOIUrl":"https://doi.org/10.1002/tafs.10412","url":null,"abstract":"","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42781448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Garret J. Kratina, D. DeVries, R. Wright, E. Peatman, S. Rider, Honggang Zhao
{"title":"Using fish hard‐part microchemistry and genetics to quantify population impacts of low‐use lock‐and‐dam structures on the Alabama River","authors":"Garret J. Kratina, D. DeVries, R. Wright, E. Peatman, S. Rider, Honggang Zhao","doi":"10.1002/tafs.10419","DOIUrl":"https://doi.org/10.1002/tafs.10419","url":null,"abstract":"","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45354678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stephanie A. Lingard, Arthur L. Bass, K. Cook, M. Fortier, Geoffrey G. Price, S. Hinch
{"title":"Evaluating the influence of environmental and biological factors on migration behaviour and residence duration of wild sub‐yearling Chinook Salmon in a fjord estuary using micro‐acoustic transmitters","authors":"Stephanie A. Lingard, Arthur L. Bass, K. Cook, M. Fortier, Geoffrey G. Price, S. Hinch","doi":"10.1002/tafs.10429","DOIUrl":"https://doi.org/10.1002/tafs.10429","url":null,"abstract":"","PeriodicalId":23214,"journal":{"name":"Transactions of The American Fisheries Society","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41783901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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