Erin Shepta, Joshuah Perkin, Kevin B. Mayes, Monica E. McGarrity, Christopher M. Schalk, Carmen G. Montaña
ObjectiveLive‐bait species are widely used in recreational fishing throughout the United States. However, the use of invasive fish species as live bait has been identified as a common pathway for their introduction into aquatic ecosystems. We assessed the role that the live‐bait industry has in facilitating the introduction of nonnative and invasive species into Texas rivers. We focused on two invasive cyprinodontid species, the Sheepshead Minnow Cyprinodon variegatus and Gulf Killifish Fundulus grandis, which are believed to have been introduced into inland Texas rivers via bait‐bucket releases by anglers.MethodsWe conducted telephone and in‐person surveys of live‐bait shops in Texas on a seasonal basis (summer, fall, winter, spring) for 1 year. Locally owned bait shops and regional aquaculture facilities and hatcheries were included in the surveys.ResultSurveys did not reveal the presence of these invasive cyprinodontids in inland bait shops but did reveal the sale of nonnative Goldfish Carassius auratus and their black color morph, the black salty goldfish. Surveys conducted among inland and coastal live bait shops confirmed the sale of only one nonnative bait fish and six bait items native only to certain regions of Texas. Telephone surveys with aquaculture industry experts revealed that the aquaculture industry was also facilitating the movement of nonnative game and nongame fish species throughout the state.ConclusionGiven the potential for nonnative and invasive species to negatively affect recipient aquatic ecosystems, the continued distribution of such species within the aquaculture industry represents a potential threat in Texas. Our findings highlight the need for close monitoring of the live‐bait industry in the state to prevent further introductions into inland waters and reduce potential ecological risks to native fish populations and overall ecosystem functions and services.
{"title":"Live‐bait industry as a pathway for movement of nonnative and invasive species: Implications for conservation of native Texas fishes","authors":"Erin Shepta, Joshuah Perkin, Kevin B. Mayes, Monica E. McGarrity, Christopher M. Schalk, Carmen G. Montaña","doi":"10.1002/nafm.10981","DOIUrl":"https://doi.org/10.1002/nafm.10981","url":null,"abstract":"ObjectiveLive‐bait species are widely used in recreational fishing throughout the United States. However, the use of invasive fish species as live bait has been identified as a common pathway for their introduction into aquatic ecosystems. We assessed the role that the live‐bait industry has in facilitating the introduction of nonnative and invasive species into Texas rivers. We focused on two invasive cyprinodontid species, the Sheepshead Minnow <jats:italic>Cyprinodon variegatus</jats:italic> and Gulf Killifish <jats:italic>Fundulus grandis</jats:italic>, which are believed to have been introduced into inland Texas rivers via bait‐bucket releases by anglers.MethodsWe conducted telephone and in‐person surveys of live‐bait shops in Texas on a seasonal basis (summer, fall, winter, spring) for 1 year. Locally owned bait shops and regional aquaculture facilities and hatcheries were included in the surveys.ResultSurveys did not reveal the presence of these invasive cyprinodontids in inland bait shops but did reveal the sale of nonnative Goldfish <jats:italic>Carassius auratus</jats:italic> and their black color morph, the black salty goldfish. Surveys conducted among inland and coastal live bait shops confirmed the sale of only one nonnative bait fish and six bait items native only to certain regions of Texas. Telephone surveys with aquaculture industry experts revealed that the aquaculture industry was also facilitating the movement of nonnative game and nongame fish species throughout the state.ConclusionGiven the potential for nonnative and invasive species to negatively affect recipient aquatic ecosystems, the continued distribution of such species within the aquaculture industry represents a potential threat in Texas. Our findings highlight the need for close monitoring of the live‐bait industry in the state to prevent further introductions into inland waters and reduce potential ecological risks to native fish populations and overall ecosystem functions and services.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"2 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140046811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ObjectiveArtificial propagation of Pacific salmon Oncorhynchus spp. is commonly used to achieve conservation and harvest goals. However, unintended effects of artificial propagation, such as high donor stray percentages, can reduce numbers of adults that return to target areas and also contribute spawners to different populations where they are undesirable. Until recently, it was difficult to assess if hatchery‐origin fish stray rates were atypical because few estimates of stray rates of natural‐origin fish were available. We sought to fill that gap by comparing donor stray percentages of hatchery‐ and natural‐origin Chinook Salmon O. tshawytscha and steelhead O. mykiss from the same locations.MethodsWe used 29,885 last passive integrated transponder tag detections of adult fish to estimate and compare donor stray percentages of hatchery‐origin and natural‐origin Chinook Salmon and steelhead in the upper Columbia River watershed between 2002 and 2018.ResultDonor stray percentages of hatchery‐origin spring, summer, and fall Chinook Salmon and steelhead were <0.3% at the upper Columbia basin scale and similar to natural‐origin donor stray percentages. Only steelhead donor stray percentages were higher for hatchery‐origin adults at the subbasin scale than natural‐origin counterparts and were <22% for all taxa. The percentage of hatchery‐origin steelhead and spring Chinook Salmon released in tributaries were detected at nontarget areas at higher percentages (<63%) than natural‐origin counterparts born in these tributaries. Returning hatchery‐origin and natural‐origin Chinook Salmon and steelhead generally strayed in an upstream direction in similar proportions. Juvenile spring Chinook Salmon that were moved 14–391 km from centralized hatcheries to tributaries for overwintering or final acclimation strayed at a much higher rate than those that completed their incubation, rearing, and acclimation at a single location, but this did not occur with steelhead. Other adaptive management actions that were implemented to reduce straying produced mixed results. A high proportion of stray hatchery‐origin spring Chinook Salmon initially homed to tributary weirs.ConclusionDonor stray percentages of hatchery‐origin Chinook Salmon and steelhead were generally not higher than natural‐origin donor stray percentages at larger spatial scales (e.g., upper Columbia basin and subbasin) but were higher at smaller spatial scales (e.g., tributaries). A variety of approaches can be considered to reduce undesirable production of strays, but most of them involve difficult management trade‐offs.
{"title":"Comparisons of donor stray percentages between hatchery‐ and natural‐origin Chinook Salmon and steelhead in the upper Columbia watershed","authors":"Todd N. Pearsons, Rolland R. O'Connor","doi":"10.1002/nafm.10988","DOIUrl":"https://doi.org/10.1002/nafm.10988","url":null,"abstract":"ObjectiveArtificial propagation of Pacific salmon <jats:italic>Oncorhynchus</jats:italic> spp. is commonly used to achieve conservation and harvest goals. However, unintended effects of artificial propagation, such as high donor stray percentages, can reduce numbers of adults that return to target areas and also contribute spawners to different populations where they are undesirable. Until recently, it was difficult to assess if hatchery‐origin fish stray rates were atypical because few estimates of stray rates of natural‐origin fish were available. We sought to fill that gap by comparing donor stray percentages of hatchery‐ and natural‐origin Chinook Salmon <jats:italic>O. tshawytscha</jats:italic> and steelhead <jats:italic>O. mykiss</jats:italic> from the same locations.MethodsWe used 29,885 last passive integrated transponder tag detections of adult fish to estimate and compare donor stray percentages of hatchery‐origin and natural‐origin Chinook Salmon and steelhead in the upper Columbia River watershed between 2002 and 2018.ResultDonor stray percentages of hatchery‐origin spring, summer, and fall Chinook Salmon and steelhead were <0.3% at the upper Columbia basin scale and similar to natural‐origin donor stray percentages. Only steelhead donor stray percentages were higher for hatchery‐origin adults at the subbasin scale than natural‐origin counterparts and were <22% for all taxa. The percentage of hatchery‐origin steelhead and spring Chinook Salmon released in tributaries were detected at nontarget areas at higher percentages (<63%) than natural‐origin counterparts born in these tributaries. Returning hatchery‐origin and natural‐origin Chinook Salmon and steelhead generally strayed in an upstream direction in similar proportions. Juvenile spring Chinook Salmon that were moved 14–391 km from centralized hatcheries to tributaries for overwintering or final acclimation strayed at a much higher rate than those that completed their incubation, rearing, and acclimation at a single location, but this did not occur with steelhead. Other adaptive management actions that were implemented to reduce straying produced mixed results. A high proportion of stray hatchery‐origin spring Chinook Salmon initially homed to tributary weirs.ConclusionDonor stray percentages of hatchery‐origin Chinook Salmon and steelhead were generally not higher than natural‐origin donor stray percentages at larger spatial scales (e.g., upper Columbia basin and subbasin) but were higher at smaller spatial scales (e.g., tributaries). A variety of approaches can be considered to reduce undesirable production of strays, but most of them involve difficult management trade‐offs.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"48 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140032412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Adam M. Kanigan, Scott G. Hinch, Andrew G. Lotto, Kamil Szlachta, Stephen D. Johnston, Stephanie A. Lingard
ObjectiveHatcheries are used to help supplement populations of Pacific salmon Oncorhynchus spp. for conservation and fisheries purposes and to provide stewardship opportunities. In British Columbia, small community‐run hatcheries typically focus on the latter and generally do not know the efficacy of their release approaches, unlike larger production hatcheries.MethodsWe used acoustic telemetry to track the survival and behavior of 90 hatchery‐reared Coho Salmon O. kisutch smolts, released from a community hatchery, through Burrard Inlet and into the Strait of Georgia. This is the first study to track Coho Salmon smolts released directly into a marine environment and one of very few studies to track them in an oceanic setting.ResultSmolt survival was lowest through the first 3 km of the migration at 37%, and the estimated cumulative survival to the final array (~20 km from release) was 10–23%. The presence of numerous predators in the region suggests that predation is a possible explanation for poor survival over the relatively short migration distance. Travel rates ranged from ~4 to 18 km/day, depending on the migration segment, which is slower than the marine migration of smolts from other species, likely increasing exposure to predators. However, we found potential evidence of “predator swamping,” as survival estimates across migration segments were highest for the final of our three release groups and poorest for the first release group, with intergroup survival estimates increasing by 7–12% in the final three migration segments. Releasing smolts at high densities and at night, as our partner hatchery currently does, likely improves smolt survival.ConclusionOur work demonstrates how acoustic telemetry can be used to examine hatchery practices and propose potential improvements. Saltwater readiness and the release location are factors that our results suggest may warrant future attention to potentially improve marine survival of Coho Salmon smolts.
{"title":"Acoustic telemetry tracking of Coho Salmon smolts released from a community‐run hatchery into a marine inlet reveals low early ocean survival","authors":"Adam M. Kanigan, Scott G. Hinch, Andrew G. Lotto, Kamil Szlachta, Stephen D. Johnston, Stephanie A. Lingard","doi":"10.1002/nafm.10979","DOIUrl":"https://doi.org/10.1002/nafm.10979","url":null,"abstract":"ObjectiveHatcheries are used to help supplement populations of Pacific salmon <jats:italic>Oncorhynchus</jats:italic> spp. for conservation and fisheries purposes and to provide stewardship opportunities. In British Columbia, small community‐run hatcheries typically focus on the latter and generally do not know the efficacy of their release approaches, unlike larger production hatcheries.MethodsWe used acoustic telemetry to track the survival and behavior of 90 hatchery‐reared Coho Salmon <jats:italic>O. kisutch</jats:italic> smolts, released from a community hatchery, through Burrard Inlet and into the Strait of Georgia. This is the first study to track Coho Salmon smolts released directly into a marine environment and one of very few studies to track them in an oceanic setting.ResultSmolt survival was lowest through the first 3 km of the migration at 37%, and the estimated cumulative survival to the final array (~20 km from release) was 10–23%. The presence of numerous predators in the region suggests that predation is a possible explanation for poor survival over the relatively short migration distance. Travel rates ranged from ~4 to 18 km/day, depending on the migration segment, which is slower than the marine migration of smolts from other species, likely increasing exposure to predators. However, we found potential evidence of “predator swamping,” as survival estimates across migration segments were highest for the final of our three release groups and poorest for the first release group, with intergroup survival estimates increasing by 7–12% in the final three migration segments. Releasing smolts at high densities and at night, as our partner hatchery currently does, likely improves smolt survival.ConclusionOur work demonstrates how acoustic telemetry can be used to examine hatchery practices and propose potential improvements. Saltwater readiness and the release location are factors that our results suggest may warrant future attention to potentially improve marine survival of Coho Salmon smolts.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"34 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140025545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. A. Gravenhof, M. R. Wuellner, E. A. Renner, M. J. Fincel
ObjectiveAcoustic telemetry is a tool commonly used to better understand the fates of fish following a stocking event. Until recently, predation on stocked fish could only be inferred by observing and identifying abrupt changes in tag detection histories. Recently, a novel predation transmitter has provided better insight into how predation affects poststocking survival. The main objective of this study was to use these transmitters to estimate predation rates on stocked juvenile Chinook Salmon Oncorhynchus tshawytscha in a landlocked system (Lake Oahe, South Dakota). Our secondary objectives were to determine how quickly predation was occurring, the time of day of predation events, and if there were differences in size between predated and nonpredated fish.MethodsIn 2021 and 2022, we surgically implanted Innovasea V5D 180‐kHz transmitters in 110 juvenile Chinook Salmon. These tagged Chinook Salmon were stocked at two locations on Lake Oahe along with a large cohort of untagged individuals. The tagged Chinook Salmon were passively tracked using an array of Innovasea VR2W 180‐kHz acoustic receivers.ResultAcross the two study years, we observed a mean predation rate (±SE) of 32.9 ± 6% on the tagged Chinook Salmon. Predation on the tagged Chinook Salmon occurred relatively quickly, with a mean time to predation of 86.7 ± 10.8 h. Additionally, 70% of the observed predation occurred during the daytime. Interestingly, results indicated that total length did not differ between fish that were preyed upon or and those that were, but there was a difference in total weight between the two groups.ConclusionOur results provide insight into recruitment bottlenecks within this population and offer information to other researchers regarding the advantages and limitations of this novel technology. Understanding how to mitigate predation could help to guide future stocking strategies to ensure a better return on investment for costly stocking programs.
{"title":"Estimating predation rates of stocked juvenile Chinook Salmon using novel acoustic predation transmitters","authors":"D. A. Gravenhof, M. R. Wuellner, E. A. Renner, M. J. Fincel","doi":"10.1002/nafm.10992","DOIUrl":"https://doi.org/10.1002/nafm.10992","url":null,"abstract":"ObjectiveAcoustic telemetry is a tool commonly used to better understand the fates of fish following a stocking event. Until recently, predation on stocked fish could only be inferred by observing and identifying abrupt changes in tag detection histories. Recently, a novel predation transmitter has provided better insight into how predation affects poststocking survival. The main objective of this study was to use these transmitters to estimate predation rates on stocked juvenile Chinook Salmon <jats:italic>Oncorhynchus tshawytscha</jats:italic> in a landlocked system (Lake Oahe, South Dakota). Our secondary objectives were to determine how quickly predation was occurring, the time of day of predation events, and if there were differences in size between predated and nonpredated fish.MethodsIn 2021 and 2022, we surgically implanted Innovasea V5D 180‐kHz transmitters in 110 juvenile Chinook Salmon. These tagged Chinook Salmon were stocked at two locations on Lake Oahe along with a large cohort of untagged individuals. The tagged Chinook Salmon were passively tracked using an array of Innovasea VR2W 180‐kHz acoustic receivers.ResultAcross the two study years, we observed a mean predation rate (±SE) of 32.9 ± 6% on the tagged Chinook Salmon. Predation on the tagged Chinook Salmon occurred relatively quickly, with a mean time to predation of 86.7 ± 10.8 h. Additionally, 70% of the observed predation occurred during the daytime. Interestingly, results indicated that total length did not differ between fish that were preyed upon or and those that were, but there was a difference in total weight between the two groups.ConclusionOur results provide insight into recruitment bottlenecks within this population and offer information to other researchers regarding the advantages and limitations of this novel technology. Understanding how to mitigate predation could help to guide future stocking strategies to ensure a better return on investment for costly stocking programs.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"2 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140032602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. F. Colborne, M. D. Faust, T. O. Brenden, T. A. Hayden, J. M. Robinson, T. M. MacDougall, H. A. Cook, D. A. Isermann, D. J. Dembkowski, M. Haffley, C. S. Vandergoot
Both electronic tags (e.g., acoustic and radio transmitters) and conventional external tags are used to evaluate movement and population dynamics of fish. External tags are also sometimes used to facilitate the recovery of internal electronic tags or other instrumentation because healing can make it difficult to identify fish with internal tags based on appearance alone. With both tag types, tag shedding and failure of electronic tags can affect accuracy and precision of study results.
{"title":"Estimating internal transmitter and external tag retention by Walleye in the Laurentian Great Lakes over multiple years","authors":"S. F. Colborne, M. D. Faust, T. O. Brenden, T. A. Hayden, J. M. Robinson, T. M. MacDougall, H. A. Cook, D. A. Isermann, D. J. Dembkowski, M. Haffley, C. S. Vandergoot","doi":"10.1002/nafm.10973","DOIUrl":"https://doi.org/10.1002/nafm.10973","url":null,"abstract":"Both electronic tags (e.g., acoustic and radio transmitters) and conventional external tags are used to evaluate movement and population dynamics of fish. External tags are also sometimes used to facilitate the recovery of internal electronic tags or other instrumentation because healing can make it difficult to identify fish with internal tags based on appearance alone. With both tag types, tag shedding and failure of electronic tags can affect accuracy and precision of study results.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"28 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139770282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
George Whitman, Jordan Messner, Rachel C. Johnson, Malte Willmes, Brian P. Kennedy, Carson Jeffres
The illegal introduction of fish species can disrupt ecosystems, collapse food webs, and undermine recreational fishing opportunities. Determining whether introduced fish are locally reproducing is important for resource managers. Here, we used the geochemical analysis of otoliths to investigate the potential illegal introduction of a Walleye Sander vitreus caught in 2022, in Lake Cascade, Idaho. Lake Cascade is known for its recreational Yellow Perch Perca flavescens fishery and has no documented resident population of Walleye.
{"title":"Forensic geochemistry identifies the illegal introduction of Walleye into Lake Cascade, Idaho","authors":"George Whitman, Jordan Messner, Rachel C. Johnson, Malte Willmes, Brian P. Kennedy, Carson Jeffres","doi":"10.1002/nafm.10985","DOIUrl":"https://doi.org/10.1002/nafm.10985","url":null,"abstract":"The illegal introduction of fish species can disrupt ecosystems, collapse food webs, and undermine recreational fishing opportunities. Determining whether introduced fish are locally reproducing is important for resource managers. Here, we used the geochemical analysis of otoliths to investigate the potential illegal introduction of a Walleye <i>Sander vitreus</i> caught in 2022, in Lake Cascade, Idaho. Lake Cascade is known for its recreational Yellow Perch <i>Perca flavescens</i> fishery and has no documented resident population of Walleye.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"18 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139770225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gary C. Longo, Melissa A. Head, Sandy L. Parker-Stetter, Ian G. Taylor, Vanessa J. Tuttle, Alicia A. Billings, Stéphane Gauthier, Michelle M. McClure, Krista M. Nichols
Understanding the genetic structure of harvested fishery species is crucial for accurate stock assessments and effective management strategies. There have been several rangewide population genetic analyses of Pacific Hake Merluccius productus; however, a thorough focus on the heavily harvested coastal stock off the west coast of North America is missing. Recent observations of spatial–temporal variability in life history and migratory patterns of the coastal population have brought into question whether this variation may be related to genetic differentiation.
{"title":"Population genomics of coastal Pacific Hake","authors":"Gary C. Longo, Melissa A. Head, Sandy L. Parker-Stetter, Ian G. Taylor, Vanessa J. Tuttle, Alicia A. Billings, Stéphane Gauthier, Michelle M. McClure, Krista M. Nichols","doi":"10.1002/nafm.10969","DOIUrl":"https://doi.org/10.1002/nafm.10969","url":null,"abstract":"Understanding the genetic structure of harvested fishery species is crucial for accurate stock assessments and effective management strategies. There have been several rangewide population genetic analyses of Pacific Hake <i>Merluccius productus</i>; however, a thorough focus on the heavily harvested coastal stock off the west coast of North America is missing. Recent observations of spatial–temporal variability in life history and migratory patterns of the coastal population have brought into question whether this variation may be related to genetic differentiation.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"15 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139770286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. T. Kroboth, A. M. Herndon, C. L. Broaddus, J. R. Fischer
Black Carp Mylopharyngodon piceus is an emerging invasive species in North America with an expanding population in the Mississippi River basin. Current aging methods use a suite of structures for age estimation, and a single structure is needed to minimize processing time, to maximize consistency of age and growth measurements, and to allow for back-calculation of individual fish length at age.
{"title":"Precision of four calcified structures for age estimation of Black Carp","authors":"P. T. Kroboth, A. M. Herndon, C. L. Broaddus, J. R. Fischer","doi":"10.1002/nafm.10983","DOIUrl":"https://doi.org/10.1002/nafm.10983","url":null,"abstract":"Black Carp <i>Mylopharyngodon piceus</i> is an emerging invasive species in North America with an expanding population in the Mississippi River basin. Current aging methods use a suite of structures for age estimation, and a single structure is needed to minimize processing time, to maximize consistency of age and growth measurements, and to allow for back-calculation of individual fish length at age.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"255 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139770140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luc LaRochelle, Laura Haniford, Declan Burton, John F. Bieber, Jessica A. Robichaud, Cory D. Suski, Andy J. Danylchuk, Steven J. Cooke
There is an ongoing effort to enhance the welfare and survival of black bass Micropterus spp. released after angling tournaments. Live-well additives are substances added to live-well water that are intended to help fish recover during retention. Aside from claims made by manufacturers, little information is available on the additives' effectiveness for recovery or their potential welfare consequences. Thus, our objective was to test whether live-well additives influence fish physiology and postrelease behavior.
{"title":"Do live-well additives influence the physiological and behavioral recovery of Largemouth Bass?","authors":"Luc LaRochelle, Laura Haniford, Declan Burton, John F. Bieber, Jessica A. Robichaud, Cory D. Suski, Andy J. Danylchuk, Steven J. Cooke","doi":"10.1002/nafm.10975","DOIUrl":"https://doi.org/10.1002/nafm.10975","url":null,"abstract":"There is an ongoing effort to enhance the welfare and survival of black bass <i>Micropterus</i> spp. released after angling tournaments. Live-well additives are substances added to live-well water that are intended to help fish recover during retention. Aside from claims made by manufacturers, little information is available on the additives' effectiveness for recovery or their potential welfare consequences. Thus, our objective was to test whether live-well additives influence fish physiology and postrelease behavior.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"38 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139656634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Steven M. Sammons, Jason E. Dattilo, Steven J. Rider
Much of the fish biodiversity in the southeastern USA is found in lotic systems, but assessment of fish community structure in large nonwadeable rivers has lagged compared to streams. Sampling designs that adequately estimate species richness are a prerequisite to creating bioassessment metrics but thus far has not been attempted in highly biodiverse rivers in the southeastern USA east of the Mississippi River.
{"title":"Assessing electrofishing effort required to estimate species richness of fishes in nonwadeable rivers of Alabama, USA","authors":"Steven M. Sammons, Jason E. Dattilo, Steven J. Rider","doi":"10.1002/nafm.10952","DOIUrl":"https://doi.org/10.1002/nafm.10952","url":null,"abstract":"Much of the fish biodiversity in the southeastern USA is found in lotic systems, but assessment of fish community structure in large nonwadeable rivers has lagged compared to streams. Sampling designs that adequately estimate species richness are a prerequisite to creating bioassessment metrics but thus far has not been attempted in highly biodiverse rivers in the southeastern USA east of the Mississippi River.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":"27 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139516935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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