DOCSLIB.ORG

Mercury Biomagnification in Subtropical Reservoirs of Eastern China

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Mercury Biomagnification in Subtropical Reservoirs of Eastern China MERCURY BIOMAGNIFICATION IN SUBTROPICAL RESERVOIRS OF EASTERN CHINA by Neguysa Roxanna Razavi A thesis submitted to the Department of Biology In conformity with the requirements for the Degree of Doctor of Philosophy Queen’s University Kingston, Ontario, Canada June, 2014 Copyright © Neguysa Roxanna Razavi, 2014 Abstract Mercury (Hg) is a global pollutant, yet Hg biomagnification, the increase in Hg with trophic level, remains poorly characterized in many regions, especially at subtropical latitudes. The present study assessed subtropical reservoirs of eastern China, which provided an opportunity to quantify Hg biomagnification under highly altered conditions that included high atmospheric Hg deposition, use of reservoirs for fisheries, manipulation of food webs through stocking and high fishing pressure, and increasing eutrophication. Despite China’s Hg emission and deposition rates that are among the highest worldwide, low fish Hg concentrations and Hg biomagnification rates were found; this was explained by food web structure and fish species characteristics. Stocked species occupied lower trophic levels and had significantly lower Hg concentrations relative to wild fishes. Evidence of decreased Hg concentrations with eutrophication (as indicated by chlorophyll-a) was observed, suggesting algal biodilution and/or somatic growth dilution. Relative to temperate lakes, zooplankton density dilution may also be causing reduced Hg concentrations in subtropical biota. Hydrogeomorphic features, such as water retention time and percent crop cover, explained Hg bioaccumulation factors and Hg concentrations at the base of the food web. Eutrophication and hydrogeomorphic features also influenced the bioavailability of selenium, which can protect against the toxicity of Hg at adequate concentrations, and the concentration of eicosapentaenoic acid, a beneficial fatty acid, in the planktivorous Bighead Carp (Hypophthalmichthys nobilis). This may indicate that the risk of exposure to the neurotoxicant methylmercury relative to benefits of fish consumption may increase with eutrophication in some fish species. i Overall, the findings of this study suggest food web structure, eutrophication, and hydrogeomorphic features together explain low Hg concentrations in anthropogenically modified subtropical reservoirs in eastern China. ii Co-Authorship This thesis conforms to the Manuscript Format outlined by the School of Graduate Studies and Research, with consolidated Acknowledgements and Literature Cited sections. Dr. Linda M. Campbell (Queen’s University, Saint Mary’s University) and Dr. Yuxiang Wang (Queen’s University) co-authored all manuscripts, and were critical to project development, providing financial and logistical means for field work, and feedback at all stages of manuscript preparation. Mingzhi Qu (Queen’s University) co-authored all manuscripts, as he was key to providing access to the reservoirs and field assistance in China, as well as acquiring essential background data from the Chinese literature. Dr. Yang Zhong (Fudan University) co-authored Chapter 3 and Dr. Wenwei Ren (Tongji University) co-authored all manuscripts for providing contacts, lab space and field assistants, and for facilitating sample transport and stays in China. Dr. Jin Binsong (Nanchang University) co-authored Chapters 2 and 4, for his assistance in field sampling and fish species identification. Dr. Dongmei Chen (Queen’s University) co-authored Chapter 3 for her work on land use cover mapping. Dr. Michael Arts co-authored Chapter 4 for supporting fatty acid analyses and providing critical feedback on the manuscript. Manuscripts arising directly from this thesis: Razavi NR, Qu M, Jin B, Ren W, Wang Y, Campbell LM (2014) Mercury biomagnification in subtropical reservoir fishes of eastern China. Ecotoxicology 23:133–146 doi: 10.1007/s10646-013-1158-6 iii Razavi NR, Qu M, Chen D, Zhong Y, Ren W, Wang Y, Campbell LM (in review) Effect of eutrophication on mercury (Hg) dynamics in subtropical reservoirs from a high Hg deposition ecoregion. Razavi NR, Arts MT, Qu M, Jin B, Ren W, Wang Y, Campbell LM (in review) Effect of eutrophication on mercury, selenium, and essential fatty acids in Bighead Carp (Hypophthalmichthys nobilis) from reservoirs of eastern China. iv Acknowledgements I would like to express my great appreciation to Linda Campbell and Yuxiang Wang for their co-supervision of my work. I thank Linda for selecting me to take on this challenging project, for providing funding and supporting scholarships, grant applications, and attendance to workshops, national and international conferences, and most of all for helping me build my autonomy as a researcher. I thank Yuxiang for sharing his network of colleagues, which was essential to the success of this work in China, and I also thank him for his constant encouragement and availability to discuss and advise on various situations. I am grateful to both Linda and Yuxiang for their time and comments on my written work. My sincerest thanks are also extended to Peter Hodson for serving as my internal committee member, and whose advice, critical questions, and rigorous editing were crucial to the integrity of this work. I would also like to thank my examining committee consisting of Louise Winn, Dan Lefebvre, Peter Boag, and Alan Mak from Queen’s University for their time and feedback on the preparation of the final document. I am also very grateful to Marc Amyot at the Université de Montréal for accepting to serve as my external examiner. This project would not have been possible without the help of many colleagues in China. I express my gratitude to Ren Wenwei, Zhong Yang and Zhang Zhiyao for facilitating my travel and stays in China, as well as providing access to field assistants and lab space while at Fudan University. Qu Mingzhi and Chen Yanping were critical to completing fieldwork and communicating on my behalf while in China, I remain deeply humbled by their help and generosity. I am indebted to Jin Binsong for his field v assistance and instructions on Chinese fish species identification. I would also like to thank members of the local administration offices for granting access to reservoirs and providing assistance in the field. I am deeply appreciative of the feedback, advice and discussions from project development to manuscript preparation first and foremost from Raphaël Lavoie. Leonardo Campagna, David Depew, David Lean, Jeff Ridal and Brian Hickey were also of great assistance in this regard. Data acquisition was made possible by the work of many. Completion of mercury analyses would not have been feasible without the patient training and advice from Diana Babi at Tekran Instruments. Likewise, Emmanuel Yumvihoze at the University of Ottawa provided insights and instructions, and I would especially like to thank him for the analyses of methylmercury in water, zooplankton and Bighead Carp, as well as fielding many QA/QC questions. Thank you to Alexandre Poulain at the University of Ottawa for allowing me to complete my analyses under Emmanuel’s guidance. A sincere thank you to Mo Aomei and John Poulopoulos at Queen’s University for assistance with mercury analyses early on in this project. I would like to acknowledge and thank Allison Rutter, Graham Cairns and Mesha Thompson at the Queen’s Analytical Services Unit for selenium and preliminary methylmercury analyses. The sampling and analyses of tissues for fatty acids were possible by the generous help and guidance of Michael Arts, Jerry Chao, and Ashley Kling, then at the Canadian Centre for Inland Waters at Environment Canada. Further thanks to Michael Arts for feedback during manuscript preparation. I would like to express my gratitude to Pat Chow-Fraser and Maja Cvetkovic at McMaster vi University for the analyses of chlorophyll-a. I would also like to thank the Stable Isotope Facility at the University of California at Davis for always accommodating my timelines in the analyses of stable isotopes, and I thank Joy Matthews for answering questions regarding sample preparation. I would like express my gratitude to John Casselman at Queen’s for his work on fish ageing and for providing me with access to his laboratory, and technician Tom Hawson for extraction and preparation of otoliths. Thank you also to Courtney Holden for facilitating this aspect of my project. Thank you to Anneli Jokela and Kimberley Lemmen at Queen’s for assistance in zooplankton enumeration, and Jiming Fang at the Institute for Clinical Evaluative Sciences for his assistance with statistical analyses. I am very appreciative of Dongmei Chen at Queen’s for her acceptance to assist in reservoir land use characterization. Lastly, to the SWEP students Diana Flood, Victoria Donovan, Michele Parisien, and Kira MacDougall for their hard work in sample organization and preparation. I am greatly indebted to Biology and Environmental Studies staff for assistance with administrative work involved with travel, conference attendance, sample export, licensing, stipend provision and organizing committee meetings. For this I owe many thanks to Karen Topping, Karen Depew, Joanne Surette, Janice Gruenberg, Carol Noel, John Topping, Ruth Lappan, Ron Kerr and Tice Post. My labmates have provided support in the field and lab, critical feedback on manuscripts and many talks, and most importantly, their friendship and worldview. To Qu Mingzhi, Raphaël Lavoie, Christopher Baird, David Depew, John Poulopoulos, Mark Kelly, Marina Arcagni, Zhang Liang, Sae Yun Kwon, Fang Tian and Elizabeth Yanch.
Load more

Recommended publications
  • Trophic Transfer of Mercury in a Subtropical Coral Reef Food Web
    Trophic Transfer of Mercury in a Subtropical Coral Reef Food Web _______________________________________________________________________ A Thesis Presented to The Faculty of the College of Arts and Sciences Florida Gulf Coast University In Partial Fulfillment Of the Requirement for the Degree of Master of Science ________________________________________________________________________ By Christopher Tyler Lienhardt 2015 APPROVAL SHEET This thesis is submitted in partial fulfillment of the requirements for the degree of Master of Science ____________________________ Christopher Tyler Lienhardt Approved: July 2015 ____________________________ Darren G. Rumbold, Ph.D. Committee Chair / Advisor ____________________________ Michael L. Parsons, Ph.D. ____________________________ Ai Ning Loh, Ph. D. The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. i Acknowledgments This research would not have been possible without the support and encouragement of numerous friends and family. First and foremost I would like to thank my major advisor, Dr. Darren Rumbold, for giving me the opportunity to play a part in some of the great research he is conducting, and add another piece to the puzzle that is mercury biomagnification research. The knowledge, wisdom and skills imparted unto me over the past three years, I cannot thank him enough for. I would also like to thank Dr. Michael Parsons for giving me a shot to be a part of the field team and assist in the conducting of our research. I also owe him thanks for his guidance and the nature of his graduate courses, which helped prepare me to take on such a task.
    [Show full text]
  • Biomagnification of Methylmercury in a Marine Plankton Ecosystem
    EGU2020-1695, updated on 01 Oct 2021 https://doi.org/10.5194/egusphere-egu2020-1695 EGU General Assembly 2020 © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Biomagnification of methylmercury in a marine plankton ecosystem Peipei Wu1, Emily Zakem2,3, Stephanie Dutkiewicz2, and Yanxu Zhang1 1School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu, China ([email protected]) 2Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, USA 3Department of Biological Sciences, University of Southern California, Los Angeles,USA Methylmercury is greatly bioconcentrated and biomagnified in marine plankton ecosystems, and these communities form the basis of marine food webs. Therefore, evaluating the potential exposure of methylmercury to higher trophic levels, including humans, requires a better understanding of its distribution in the ocean and the factors that control its biomagnification. In this study, a coupled physical/ecological model was used to simulate the trophic transfer of monomethylmercury (MMHg) in a marine plankton ecosystem. The model includes phytoplankton, a microbial community, herbivorous zooplankton (HZ), and carnivorous zooplankton (CZ). The model captured both shorter food chains in oligotrophic regions, with small HZ feeding on small phytoplankton, and longer chains in higher nutrient conditions, with larger HZ feeding on larger phytoplankton and larger CZ feeding on larger HZ. In the model, trophic dilution occurred in the food webs that involved small zooplankton, as the grazing fluxes of small zooplankton were insufficient to accumulate more MMHg in themselves than in their prey. The model suggested that biomagnification was more prominent in large zooplankton and that the microbial community played an important role in the trophic transfer of MMHg.
    [Show full text]
  • Chanodichthys Recurviceps (A Fish, No Common Name) Ecological Risk Screening Summary
    Chanodichthys recurviceps (a fish, no common name) Ecological Risk Screening Summary U.S. Fish and Wildlife Service, June 2012 Revised, November 2016 Web Version, 6/18/2018 Photo: H. T. Cheng. Licensed under CC BY-NC. Available: http://naturewatch.org.nz/taxa/187285-Culter-recurviceps. (November 2016). 1 Native Range and Status in the United States Native Range From Zhao and Cui (2011): “Known from Zhu Jiang River (Pearl River) in Guangdong and Guanxi Provinces, and Hainan Province in China.” Status in the United States This species has not been reported in the United States. 1 Means of Introductions in the United States This species has not been reported in the United States. 2 Biology and Ecology Taxonomic Hierarchy and Taxonomic Standing From ITIS (2016): “Kingdom Animalia Subkingdom Bilateria Infrakingdom Deuterostomia Phylum Chordata Subphylum Vertebrata Infraphylum Gnathostomata Superclass Osteichthyes Class Actinopterygii Subclass Neopterygii Infraclass Teleostei Superorder Ostariophysi Order Cypriniformes Superfamily Cyprinoidea Family Cyprinidae Genus Culter Basilewsky, 1855 Species Culter recurviceps (Richardson, 1846)” From Eschmeyer et al. (2016): “recurviceps, Leuciscus Richardson [J.] 1846:295 [Report of the British Association for the Advancement of Science 15th meeting [1845] […]] Canton, China. No types known. Based solely on an illustration by Reeves (see Whitehead 1970:210, Pl. 17a […]). •Valid as Erythroculter recurviceps (Richardson 1846) -- (Lu in Pan et al. 1991:93 […]). •Questionably the same as Culter alburnus Basilewsky 1855 -- (Bogutskaya & Naseka 1996:24 […], Naseka 1998:75 […]). •Valid as Culter recurviceps (Richardson 1846) -- (Luo & Chen in Chen et al. 1998:188 […], Zhang et al. 2016:59 […]). •Valid as Chanodichthys recurviceps (Richardson 1846) -- (Kottelat 2013:87 […]).
    [Show full text]
  • Calculation of Critical Loads for Cadmium, Lead and Mercury
    Calculation of critical loads for cadmium, lead and mercury Commissioned by the Dutch Ministries of Agriculture, Nature and Food Quality and of Housing, Spatial Planning and Environment 2 Alterra-report 1104 Calculation of critical loads for cadmium, lead and mercury Background document to a Mapping Manual on Critical Loads of cadmium, lead and mercury W. de Vries G. Schütze S. Lofts E. Tipping M. Meili P. F.A.M. Römkens J.E. Groenenberg Alterra-report 1104 Alterra, Wageningen, 2005 ABSTRACT Vries, W. de, G. Schütze, S. Lofts, E. Tipping, M. Meili, P.F.A.M. Römkens and J.E. Groenenberg, 2005. Calculation of critical loads for cadmium, lead and mercury. Background document to a Mapping Manual on Critical Loads of cadmium, lead and mercury. Wageningen, Alterra, Alterra-report 1104. 143 blz.; 1 fig; 13 tables.; 53 refs This report on heavy metals provides up-to-date methodologies to derive critical loads for the heavy metals cadmium (Cd), lead (Pb) and mercury (Hg) for both terrestrial and aquatic ecosystems. It presents background information to a Manual on Critical Loads for those metals. Focus is given to the methodologies and critical limits that have to be used to derive critical loads can be derived for Cd, Pb and Hg in view of : (i) ecotoxicological effects for either terrestrial or aquatic ecosystems.and (ii) human health effects for either terrestrial or aquatic ecosystems. For Hg, a separate approach is described to estimate critical levels in precipitation in view of human health effects due to the consumption of fish. The limitations and uncertainties of the approach are discussed including: (i) the uncertainties and particularities of the steady-state models used and (ii) the reliability of the approaches that are applied to derive critical limits for critical total dissolved metal concentrations in soil solution and surface water.
    [Show full text]
  • Ecology (Pyramids, Biomagnification, & Succession
    ENERGY PYRAMIDS & Freshmen Biology FOOD CHAINS/FOOD WEBS May 4 – May 8 Lecture ENERGY FLOW •Energy → powers life’s processes •Energy = ATP! •Flow of energy determines the system’s ability to sustain life FEEDING RELATIONSHIPS • Energy flows through an ecosystem in one direction • Sun → autotrophs (producers) → heterotrophs (consumers) FOOD CHAIN VS. FOOD WEB FOOD CHAINS • Energy stored by producers → passed through an ecosystem by a food chain • Food chain = series of steps in which organisms transfer energy by eating and being eaten FOOD WEBS •Feeding relationships are more complex than can be shown in a food chain •Food Web = network of complex interactions •Food webs link all the food chains in an ecosystem together ECOLOGICAL PYRAMIDS • Used to show the relationships in Ecosystems • There are different types: • Energy Pyramid • Biomass Pyramid • Pyramid of numbers ENERGY PYRAMID • Only part of the energy that is stored in one trophic level can be passed on to the next level • Much of the energy that is consumed is used for the basic functions of life (breathing, moving, reproducing) • Only 10% is used to produce more biomass (10 % moves on) • This is what can be obtained from the next trophic level • All of the other energy is lost 10% RULE • Only 10% of energy (from organisms) at one trophic level → the next level • EX: only 10% of energy/calories from grasses is available to cows • WHY? • Energy used for bodily processes (growth/development and repair) • Energy given off as heat • Energy used for daily functioning/movement • Only 10% of energy you take in should be going to your actual biomass/weight which another organism could eat BIOMASS PYRAMID • Total amount of living tissue within a given trophic level = biomass • Represents the amount of potential food available for each trophic level in an ecosystem PYRAMID OF NUMBERS •Based on the number of individuals at each trophic level.
    [Show full text]
  • Toxic Chemical Contaminants
    4 NaturalNatural RegionsRegions ofof thethe GulfGulf ofof MaineMaine TOXIC CHEMICAL CONTAMINANTS STATE OF THE GULF OF MAINE REPORT Gulf of Maine Census Marine Life May 2013 TOXIC CHEMICAL CONTAMINANTS STATE OF THE GULF OF MAINE REPORT TABLE OF CONTENTS 1. Issue in Brief ................................................................................................... 1 2. Driving Forces and Pressures .......................................................................4 2.1 Human .................................................................................................4 2.2 Natural .................................................................................................6 3. Status and Trends ..........................................................................................7 4. Impacts ........................................................................................................ 15 4.1 Biodiversity and Ecosystem Impacts ................................................ 15 4.2 Human Health ....................................................................................17 4.3 Economic Impacts ............................................................................. 18 5. Actions and Responses ............................................................................... 19 5.1 Legislation and Policy........................................................................ 19 5.2 Contaminant Monitoring ...................................................................20 6. Indicator Summary ......................................................................................23
    [Show full text]
  • Active Applicant Report Type Status Applicant Name
    Active Applicant Report Type Status Applicant Name Gaming PENDING ABAH, TYRONE ABULENCIA, JOHN AGUDELO, ROBERT JR ALAMRI, HASSAN ALFONSO-ZEA, CRISTINA ALLEN, BRIAN ALTMAN, JONATHAN AMBROSE, DEZARAE AMOROSE, CHRISTINE ARROYO, BENJAMIN ASHLEY, BRANDY BAILEY, SHANAKAY BAINBRIDGE, TASHA BAKER, GAUDY BANH, JOHN BARBER, GAVIN BARRETO, JESSE BECKEY, TORI BEHANNA, AMANDA BELL, JILL 10/1/2021 7:00:09 AM Gaming PENDING BENEDICT, FREDRIC BERNSTEIN, KENNETH BIELAK, BETHANY BIRON, WILLIAM BOHANNON, JOSEPH BOLLEN, JUSTIN BORDEWICZ, TIMOTHY BRADDOCK, ALEX BRADLEY, BRANDON BRATETICH, JASON BRATTON, TERENCE BRAUNING, RICK BREEN, MICHELLE BRIGNONI, KARLI BROOKS, KRISTIAN BROWN, LANCE BROZEK, MICHAEL BRUNN, STEVEN BUCHANAN, DARRELL BUCKLEY, FRANCIS BUCKNER, DARLENE BURNHAM, CHAD BUTLER, MALKAI 10/1/2021 7:00:09 AM Gaming PENDING BYRD, AARON CABONILAS, ANGELINA CADE, ROBERT JR CAMPBELL, TAPAENGA CANO, LUIS CARABALLO, EMELISA CARDILLO, THOMAS CARLIN, LUKE CARRILLO OLIVA, GERBERTH CEDENO, ALBERTO CENTAURI, RANDALL CHAPMAN, ERIC CHARLES, PHILIP CHARLTON, MALIK CHOATE, JAMES CHURCH, CHRISTOPHER CLARKE, CLAUDIO CLOWNEY, RAMEAN COLLINS, ARMONI CONKLIN, BARRY CONKLIN, QIANG CONNELL, SHAUN COPELAND, DAVID 10/1/2021 7:00:09 AM Gaming PENDING COPSEY, RAYMOND CORREA, FAUSTINO JR COURSEY, MIAJA COX, ANTHONIE CROMWELL, GRETA CUAJUNO, GABRIEL CULLOM, JOANNA CUTHBERT, JENNIFER CYRIL, TWINKLE DALY, CADEJAH DASILVA, DENNIS DAUBERT, CANDACE DAVIES, JOEL JR DAVILA, KHADIJAH DAVIS, ROBERT DEES, I-QURAN DELPRETE, PAUL DENNIS, BRENDA DEPALMA, ANGELINA DERK, ERIC DEVER, BARBARA
    [Show full text]
  • Beta Diversity Patterns of Fish and Conservation Implications in The
    A peer-reviewed open-access journal ZooKeys 817: 73–93 (2019)Beta diversity patterns of fish and conservation implications in... 73 doi: 10.3897/zookeys.817.29337 RESEARCH ARTICLE http://zookeys.pensoft.net Launched to accelerate biodiversity research Beta diversity patterns of fish and conservation implications in the Luoxiao Mountains, China Jiajun Qin1,*, Xiongjun Liu2,3,*, Yang Xu1, Xiaoping Wu1,2,3, Shan Ouyang1 1 School of Life Sciences, Nanchang University, Nanchang 330031, China 2 Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Environmental and Chemical Engi- neering, Nanchang University, Nanchang 330031, China 3 School of Resource, Environment and Chemical Engineering, Nanchang University, Nanchang 330031, China Corresponding author: Shan Ouyang ([email protected]); Xiaoping Wu ([email protected]) Academic editor: M.E. Bichuette | Received 27 August 2018 | Accepted 20 December 2018 | Published 15 January 2019 http://zoobank.org/9691CDA3-F24B-4CE6-BBE9-88195385A2E3 Citation: Qin J, Liu X, Xu Y, Wu X, Ouyang S (2019) Beta diversity patterns of fish and conservation implications in the Luoxiao Mountains, China. ZooKeys 817: 73–93. https://doi.org/10.3897/zookeys.817.29337 Abstract The Luoxiao Mountains play an important role in maintaining and supplementing the fish diversity of the Yangtze River Basin, which is also a biodiversity hotspot in China. However, fish biodiversity has declined rapidly in this area as the result of human activities and the consequent environmental changes. Beta diversity was a key concept for understanding the ecosystem function and biodiversity conservation. Beta diversity patterns are evaluated and important information provided for protection and management of fish biodiversity in the Luoxiao Mountains.
    [Show full text]
  • Biological Control of Invasive Fish and Aquatic Invertebrates: a Brief Review with Case Studies
    Management of Biological Invasions (2019) Volume 10, Issue 2: 227–254 CORRECTED PROOF Review Biological control of invasive fish and aquatic invertebrates: a brief review with case studies Przemyslaw G. Bajer1,*, Ratna Ghosal1,+, Maciej Maselko2, Michael J. Smanski2, Joseph D. Lechelt1, Gretchen Hansen3 and Matthew S. Kornis4 1University of Minnesota, Minnesota Aquatic Invasive Species Research Center, Dept. of Fisheries, Wildlife, and Conservation Biology, 135 Skok Hall, 2003 Upper Buford Circle, St. Paul, MN 55108, USA 2University of Minnesota, Dept. of Biochemistry, Molecular Biology and Biophysics, 1479 Gortner Ave., Room 344, St. Paul MN 55108, USA 3Minnesota Department of Natural Resources, 500 Lafayette Road, St. Paul, MN 55155, USA 4U.S. Fish and Wildlife Service, Great Lakes Fish Tag and Recovery Laboratory, Green Bay Fish and Wildlife Conservation Office, 2661 Scott Tower Drive, New Franken, WI 54229, USA +Current Address: Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Gujarat 380009, India Author e-mails: [email protected] (PGB), [email protected] (RG), [email protected] (MM), [email protected] (MJS), [email protected] (JDL), [email protected] (GH), [email protected] (MSK) *Corresponding author Citation: Bajer PG, Ghosal R, Maselko M, Smanski MJ, Lechelt JD, Hansen G, Abstract Kornis MS (2019) Biological control of invasive fish and aquatic invertebrates: a We review various applications of biocontrol for invasive fish and aquatic brief review with case studies. invertebrates. We adopt a broader definition of biocontrol that includes traditional Management of Biological Invasions 10(2): methods like predation and physical removal (biocontrol by humans), and modern 227–254, https://doi.org/10.3391/mbi.2019.
    [Show full text]
  • ARCTIC CHANGE 2014 8-12 December - Shaw Centre - Ottawa, Canada
    ARCTIC CHANGE 2014 8-12 December - Shaw Centre - Ottawa, Canada Oral Presentation Abstracts Arctic Change 2014 Oral Presentation Abstracts ORAL PRESENTATION ABSTRACTS TEMPORAL TREND ASSESSMENT OF CIRCULATING conducted when possible. Results: Maternal levels of Hg and MERCURY AND PCB 153 CONCENTRATIONS AMONG PCB 153 significantly decreased between 1992 and 2013. NUNAVIMMIUT PREGNANT WOMEN (1992-2013) Overall, concentrations of Hg and PCB 153 among pregnant women decreased respectively by 57% and 77% over the last Adamou, Therese Yero (12) ([email protected]), M. Riva (12), E. Dewailly (12), S. Dery (3), G. Muckle (12), R. two decades. In 2013, concentrations of Hg and PCB 153 were Dallaire (12), EA. Laouan Sidi (1) and P. Ayotte (1,2,4) respectively 5.2 µg/L and 40.36 µg/kg plasma lipids (geometric means). Discussion: Our results suggest a significant decrease (1) Axe santé des populations et pratiques optimales en santé, of Hg and PCB 153 maternal levels from 1992 to 2013. Centre de Recherche du Centre Hospitalier Universitaire de Geometric mean concentrations of Hg and PCB 153 measured Québec, Québec,Québec, G1V 2M2 in 2013 were below Health Canada guidelines. The decline (2) Université Laval, Québec, Québec, G1V 0A6 observed could be related to measures implemented at regional, (3) Nunavik Regional Board of Health and Social Services, Kuujjuaq, Québec national and international levels to reduce environmental (4) Institut National de Santé Publique du Québec (INSPQ), pollution by mercury and PCB and/or a significant decrease Québec, G1V 5B3 of seafood consumption by pregnant women. These results have to be interpreted with caution.
    [Show full text]
  • Chanodichthys Flavipinnis) Ecological Risk Screening Summary
    Yellowfin Culter (Chanodichthys flavipinnis) Ecological Risk Screening Summary U.S. Fish & Wildlife Service, June 2012 Revised, March 2019 Web Version, 10/17/2019 1 Native Range and Status in the United States Native Range From Froese and Pauly (2019): “Asia: Annam, Viet Nam.” From Huckstorf and Freyhof (2012): “The species is known from Red River basin in northern Viet Nam and southern China (Chu and Chen 1989, Nguyen and Ngo 2001) and the Huong, Quang Tri, Giang and Lam river basins in Central Viet Nam (J. Freyhof pers. com. 2010 [Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin]).” Status in the United States Chanodichthys flavipinnis has not been documented in trade or in the wild in the United States. Means of Introductions in the United States Chanodichthys flavipinnis has not been documented in the wild in the United States. 1 Remarks Both the current valid name, Chanodichthys flavipinnis and the previous valid name Culter flavipinnis were used to conduct research. 2 Biology and Ecology Taxonomic Hierarchy and Taxonomic Standing From Fricke et al. (2019): “Current status: Valid as Chanodichthys flavipinnis (Tirant 1883).” From ITIS (2019): “Kingdom Animalia Subkingdom Bilateria Infrakingdom Deuterostomia Phylum Chordata Subphylum Vertebrata Infraphylum Gnathostomata Superclass Actinopterygii Class Teleostei Superorder Ostariophysi Order Cypriniformes Superfamily Cyprinoidea Family Cyprinidae Genus Chanodichthys Species Chanodichthys flavipinnis (Tirant, 1883)” Size, Weight, and Age Range No information was found on size, weight or age for Chanodichthys flavipinnis. Environment From Froese and Pauly (2019): “Freshwater; benthopelagic.” Climate/Range From Froese and Pauly (2019): “Tropical” 2 Distribution Outside the United States Native From Froese and Pauly (2019): “Asia: Annam, Viet Nam.” From Huckstorf and Freyhof (2012): “The species is known from Red River basin in northern Viet Nam and southern China (Chu and Chen 1989, Nguyen and Ngo 2001) and the Huong, Quang Tri, Giang and Lam river basins in Central Viet Nam (J.
    [Show full text]
  • Resolving Cypriniformes Relationships Using an Anchored Enrichment Approach Carla C
    Stout et al. BMC Evolutionary Biology (2016) 16:244 DOI 10.1186/s12862-016-0819-5 RESEARCH ARTICLE Open Access Resolving Cypriniformes relationships using an anchored enrichment approach Carla C. Stout1*†, Milton Tan1†, Alan R. Lemmon2, Emily Moriarty Lemmon3 and Jonathan W. Armbruster1 Abstract Background: Cypriniformes (minnows, carps, loaches, and suckers) is the largest group of freshwater fishes in the world (~4300 described species). Despite much attention, previous attempts to elucidate relationships using molecular and morphological characters have been incongruent. In this study we present the first phylogenomic analysis using anchored hybrid enrichment for 172 taxa to represent the order (plus three out-group taxa), which is the largest dataset for the order to date (219 loci, 315,288 bp, average locus length of 1011 bp). Results: Concatenation analysis establishes a robust tree with 97 % of nodes at 100 % bootstrap support. Species tree analysis was highly congruent with the concatenation analysis with only two major differences: monophyly of Cobitoidei and placement of Danionidae. Conclusions: Most major clades obtained in prior molecular studies were validated as monophyletic, and we provide robust resolution for the relationships among these clades for the first time. These relationships can be used as a framework for addressing a variety of evolutionary questions (e.g. phylogeography, polyploidization, diversification, trait evolution, comparative genomics) for which Cypriniformes is ideally suited. Keywords: Fish, High-throughput
    [Show full text]