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Blewett TA, Ackerly KL, Schlenker LS, Martin S, Nielsen KM. Implications of biotic factors for toxicity testing in laboratory studies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168220. [PMID: 37924878 DOI: 10.1016/j.scitotenv.2023.168220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/25/2023] [Accepted: 10/28/2023] [Indexed: 11/06/2023]
Abstract
There is an emerging call from scientists globally to advance the environmental relevance of laboratory studies, particularly within the field of ecotoxicology. To answer this call, we must carefully examine and elucidate the shortcomings of standardized toxicity testing methods that are used in the derivation of toxicity values and regulatory criteria. As a consequence of rapidly accelerating climate change, the inclusion of abiotic co-stressors are increasingly being incorporated into toxicity studies, with the goal of improving the representativeness of laboratory-derived toxicity values used in ecological risk assessments. However, much less attention has been paid to the influence of biotic factors that may just as meaningfully impact our capacity to evaluate and predict risks within impacted ecosystems. Therefore, the overarching goal is to highlight key biotic factors that should be taken into consideration during the experimental design and model selection phase. SYNOPSIS: Scientists are increasingly finding that lab reared results in toxicology might not be reflective of the external wild environment, we highlight in this review some key considerations when working between the lab and field.
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Affiliation(s)
- Tamzin A Blewett
- University of Alberta, Department of Biological Sciences, Canada.
| | - Kerri Lynn Ackerly
- The University of Texas at Austin, Marine Science Institute, United States of America
| | - Lela S Schlenker
- East Carolina University, Department of Biology, United States of America
| | - Sidney Martin
- University of Alberta, Department of Biological Sciences, Canada
| | - Kristin M Nielsen
- The University of Texas at Austin, Marine Science Institute, United States of America
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Thabit H. Biomonitoring of heavy metals using Contracaecum quadripapillatum (Nematoda) in comparison to its fish host, Lates niloticus, from the Nile River, Egypt. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:530. [PMID: 37002476 PMCID: PMC10066135 DOI: 10.1007/s10661-023-11156-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 03/20/2023] [Indexed: 06/05/2023]
Abstract
Recently, fish parasites have been used as a biomonitoring tool to indicate the health status of ecosystems. Therefore, this research aimed to evaluate the potential capacity of Contracaecum quadripapillatum larvae as accumulation indicators for metal pollution and compare metal concentrations in host tissues of non-infected and infected fish: Lates niloticus from the Nile River. Accumulations of Cd, Cu, Fe, Mn, Ni, Pb, and Zn in larval nematodes and tissues of the liver, kidney, and muscles of both infected and non-infected fish were determined. All metal concentrations exhibit a significantly higher increase in larval nematodes than the muscles of infected fish and vice versa except Cd in the kidney. On the other hand, only Cd, Mn, Pb, and Zn concentrations were significantly higher in the parasite than in the host liver. Therefore, bioaccumulation factors were most obvious and effective in the muscles of infected fish than in the liver and kidney. Contracaecum larvae accumulate Cd and Pb more than other metals. The infrapopulation size of C. quadripapillatum correlated with metal concentrations in different host tissues, especially the kidney, while the correlations between metal levels in the tissues of both parasite and fish organs exhibit different patterns in each organ. The current work revealed that C. quadripapillatum larvae represent environmental monitors for metal pollution in the freshwater ecosystem.
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Affiliation(s)
- Hasnaa Thabit
- Department of Zoology and Entomology, Faculty of Science, Assiut University, PO 71526, Assiut, Egypt.
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Eustrongylides (Nematoda:Dioctophymatidae): Epizootology and Special Characteristics of The Development Biology. Helminthologia 2022; 59:127-142. [PMID: 36118372 PMCID: PMC9444202 DOI: 10.2478/helm-2022-0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 05/19/2022] [Indexed: 11/20/2022] Open
Abstract
Eustrongylides spp. are the nematodes from the Dioctophymatidae family which are potentially dangerous for the mammal's heath. The first aim of the present research is to describe the biology, developmental characteristics and epizootology of the Eustrongylides spp. nematode. Eustrongylidosis is a parasitic disease commonly occurring in the countries with temperate continental, tropical and subtropical climate. The Eustrongylides spp. parasites are biohelmints with a complex life cycle. The development of the nematodes takes place in the aquatic environment and includes a vast range of intermediate, accidental and definitive hosts. It has also been reported in humans. The second aim of the research is to describe the clinical and pathomorphological changes in organs and tissues of the infected animals, and influence of biotic and abiotic factors on formation of the natural centers of spreading of eustrongylidosis; diagnostics of eustrongylidosis.
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Metal uptake in Psettodes erumei and Hysterothylacium spp. larvae in the Persian Gulf: Evaluation of larvae as bio-indicator. J Parasit Dis 2022; 46:421-428. [DOI: 10.1007/s12639-021-01462-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/09/2021] [Indexed: 11/25/2022] Open
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Bamidele A, Lawal-Are A, Iniobong AD, Uchenna ND, Kayode SJ, David UU. Role of Intestinal Helminth Parasite of Macrobrachium vollenhovenii-Cucullanus sp. in Host Metal Accumulation in Epe Axis of the Lekki Lagoon, Lagos, Nigeria. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 104:222-227. [PMID: 31893301 DOI: 10.1007/s00128-019-02769-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
This paper assesses the role of intestinal helminth parasite of Macrobrachium vollenhovenii on host metal accumulation in Lekki lagoon, Lagos, Nigeria. Lead, zinc, copper, chromium and iron concentrations were determined in water, sediment, intestinal parasite, intestine of infected and non-infected prawns. Intestinal nematode parasite Cucullanus sp. was identified. Pb and Cr were not detected in the water and sediment. The sediment had higher concentrations of the metals than the water medium, and exceeded the WHO limits for Zn, Cu and Fe. Cucullanus sp. accumulated Zn 19 times, Cr several thousand times more and Fe 11 times more than the host intestine (wet wt). This parasite could have accumulated these metals from its host, reducing the concentration of these metals in the tissues of the infected prawns compared to non-infected ones. The infected and non-infected prawns accumulated Zn and Fe several times more than the water medium. The parasite influenced metal accumulation in the host tissue and pose ecological risk.
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Affiliation(s)
- Akinsanya Bamidele
- Ecotoxicology and Parasitology Unit, Department of Zoology, University of Lagos, Lagos, Nigeria.
| | - Aderonke Lawal-Are
- Fisheries and Aquaculture Unit, Department of Marine Sciences and Fisheries, University of Lagos, Lagos, Nigeria
| | - Akhiromen Dorathy Iniobong
- Fisheries and Aquaculture Unit, Department of Marine Sciences and Fisheries, University of Lagos, Lagos, Nigeria
| | - Nwadike David Uchenna
- Fisheries and Aquaculture Unit, Department of Marine Sciences and Fisheries, University of Lagos, Lagos, Nigeria
| | - Saliu Joseph Kayode
- Ecotoxicology and Parasitology Unit, Department of Zoology, University of Lagos, Lagos, Nigeria
| | - Ukwa Uche David
- Ecotoxicology and Parasitology Unit, Department of Zoology, University of Lagos, Lagos, Nigeria
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Intestinal Parasites, Anemia and Nutritional Status in Young Children from Transitioning Western Amazon. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17020577. [PMID: 31963189 PMCID: PMC7014309 DOI: 10.3390/ijerph17020577] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/11/2020] [Accepted: 01/14/2020] [Indexed: 12/17/2022]
Abstract
Young children are particularly vulnerable to the chronic sequelae of anemia, including poor nutritional status. The aim of this study was to assess intestinal parasitic-infections and nutritional status (anemia and linear growth) in preschool children living in contemporary Amazonian communities. A cross-sectional study measured children’s intestinal parasites and hair-Hg (HHg)—biomarkers of fish consumption, hemoglobin levels, and growth (anthropometric Z-scores). Children came from traditional-living families (Itapuã), and tin-mining settlements (Bom Futuro) representing current transitioning populations. It covered 937 pre-school children (from 1 to 59 months of age) from traditional (247) and immigrant tin-mining families (688). There was a high prevalence of intestinal polyparasitic-infection in children from both communities, but mild anemia (hemoglobin concentrations) and moderate (chronic) malnutrition were more frequent in children from traditional families than in children from tin-mining settlers. Children from traditional families ate significantly more fish (HHg mean of 4.3 µg/g) than children from tin-mining families (HHg mean of 2.3 µg/g). Among traditional villagers, children showed a significant correlation (r = 0.2318; p = 0.0005) between hemoglobin concentrations and HHg concentrations. High rates of parasitic infection underlie the poverty and attendant health issues of young children in the Brazilian Amazon. The intestinal parasite burden affecting poor Amazonian children resulting from unsafe water, lack of sanitation and poor hygiene is the most urgent environmental health issue.
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Dairain A, Legeay A, Gonzalez P, Baudrimont M, Gourves PY, de Montaudouin X. Seasonal influence of parasitism on contamination patterns of the mud shrimp Upogebia cf. pusilla in an area of low pollution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:319-332. [PMID: 31349171 DOI: 10.1016/j.scitotenv.2019.07.258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 07/16/2019] [Accepted: 07/16/2019] [Indexed: 06/10/2023]
Abstract
Very few studies have characterized the concentrations of pollutants in bioturbating species. These species are considered as ecosystem engineers and characterizing stressors, such as contaminants, that impact them could lead to a better understanding of the functioning of ecosystems. In addition to contaminants, bioturbators are affected by a wide range of stressors, which can influence their physiological status and their ability to accumulate pollutants. Among these stressors, parasitism is of particular concern due to the ubiquity of parasites in natural environments and their influence on the fitness of their host. This study aims to assess the relationship between parasitism and metal accumulation in the bioturbating mud shrimp Upogebia cf. pusilla. A one-year seasonal survey was conducted in Arcachon Bay, France, with the aims of (1) characterizing the levels of metals in the mud shrimp and (2) evaluating the influence of two macroparasites (a bopyrid isopod and a trematode) on the variation of the metal content in mud shrimp. The bopyrid parasite castrates its female host and a particular attention has therefore been paid to the reproductive cycle of female mud shrimp by quantifying the expression of the vitellogenin gene that encodes the major yolk protein in female crustaceans. The levels of contaminants in mud shrimp appeared low compared to those reported in other crustaceans in areas of higher pollution. Even at these low contamination levels, we observed a significant impact by the bopyrid parasite that depends on season: bopyrid-infested organisms are generally more contaminated than their uninfested conspecifics except in summer when the opposite trend was observed. We suggest that the bopyrid indirectly interferes with the metal accumulation process by altering the reproductive capabilities of the mud shrimp. On the opposite, very low influence of the trematode parasite on the metal content of the host was found.
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Affiliation(s)
| | - Alexia Legeay
- Univ. Bordeaux, EPOC, UMR CNRS 5805, F-33400 Talence, France
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Dairain A, Legeay A, Gernigon V, de Montaudouin X. How does the bopyrid isopod Gyge branchialis interfere with trace metal bioaccumulation in the mud shrimp Upogebia cf. pusilla? Parasitol Res 2018; 118:363-367. [PMID: 30465072 DOI: 10.1007/s00436-018-6148-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 11/12/2018] [Indexed: 10/27/2022]
Abstract
Parasites are widespread in natural environments, and their impacts on the fitness of their host and, at a broader scale, on ecosystem functioning are well recognized. Over the last two decades, there has been an increasing interest in the effects of parasites in conjunction with other stressors, especially pollutants, on the health of organisms. For instance, parasites can interfere with the bioaccumulation process of contaminants in their host leading to parasitized organisms exhibiting lower pollutants burdens than unparasitized individuals for example. However, the mechanisms underlying these patterns are not well understood. This study examined how the bopyrid parasite Gyge branchialis could lower the cadmium (Cd) uptake of its mud shrimp host Upogebia cf. pusilla. When exposed to water-borne Cd, parasites were able to bioaccumulate this trace metal. However, the uptake of Cd by the parasite was low and cannot entirely explain the deficit of Cd contamination of the host. The weight of gills of parasitized organisms was significantly reduced compared with unparasitized organisms. We suggest that by reducing the surface for metal uptake, parasites could lower the contaminant burden of their host.
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Affiliation(s)
| | - Alexia Legeay
- Univ. Bordeaux, EPOC, UMR CNRS 5805, F-33400, Talence, France
| | - Valentine Gernigon
- Univ. Bordeaux, EPOC, UMR CNRS 5805, F-33400, Talence, France.,Univ. Lyon I, F-69100, Villeurbanne, France
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Gilbert BM, Avenant-Oldewage A. Parasites and pollution: the effectiveness of tiny organisms in assessing the quality of aquatic ecosystems, with a focus on Africa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:18742-18769. [PMID: 28660518 DOI: 10.1007/s11356-017-9481-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 06/07/2017] [Indexed: 06/07/2023]
Abstract
The aquatic environment represents the final repository for many human-generated pollutants associated with anthropogenic activities. The quality of natural freshwater systems is easily disrupted by the introduction of pollutants from urban, industrial and agricultural processes. To assess the extent of chemical perturbation and associated environmental degradation, physico-chemical parameters have been monitored in conjunction with biota in numerous biological monitoring protocols. Most studies incorporating organisms into such approaches have focussed on fish and macroinvertebrates. More recently, interest in the ecology of parasites in relation to environmental monitoring has indicated that these organisms are sensitive towards the quality of the macroenvironment. Variable responses towards exposure to pollution have been identified at the population and component community level of a number of parasites. Furthermore, such responses have been found to differ with the type of pollutant and the lifestyle of the parasite. Generally, endoparasite infection levels have been shown to become elevated in relation to poorer water quality conditions, while ectoparasites are more sensitive, and exposure to contaminated environments resulted in a decline in ectoparasite infections. Furthermore, endoparasites have been found to be suitable accumulation indicators for monitoring levels of several trace elements and metals in the environment. The ability of these organisms to accumulate metals has further been observed to be of benefit to the host, resulting in decreased somatic metal levels in infected hosts. These trends have similarly been found for host-parasite models in African freshwater environments, but such analyses are comparatively sparse compared to other countries. Recently, studies on diplozoids from two freshwater systems have indicated that exposure to poorer water quality resulted in decreased infections. In the Vaal River, the poor water quality resulted in the extinction of the parasite from a site below the Vaal River Barrage. Laboratory exposures have further indicated that oncomiracidia of Paradiplozoon ichthyoxanthon are sensitive to exposure to dissolved aluminium. Overall, parasites from African freshwater and marine ecosystems have merit as effect and accumulation indicators; however, more research is required to detail the effects of exposure on sensitive biological processes within these organisms.
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Sures B, Nachev M, Selbach C, Marcogliese DJ. Parasite responses to pollution: what we know and where we go in 'Environmental Parasitology'. Parasit Vectors 2017; 10:65. [PMID: 28166838 PMCID: PMC5294906 DOI: 10.1186/s13071-017-2001-3] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 01/24/2017] [Indexed: 01/13/2023] Open
Abstract
Environmental parasitology deals with the interactions between parasites and pollutants in the environment. Their sensitivity to pollutants and environmental disturbances makes many parasite taxa useful indicators of environmental health and anthropogenic impact. Over the last 20 years, three main research directions have been shown to be highly promising and relevant, namely parasites as accumulation indicators for selected pollutants, parasites as effect indicators, and the role of parasites interacting with established bioindicators. The current paper focuses on the potential use of parasites as indicators of environmental pollution and the interactions with their hosts. By reviewing some of the most recent findings in the field of environmental parasitology, we summarize the current state of the art and try to identify promising ideas for future research directions. In detail, we address the suitability of parasites as accumulation indicators and their possible application to demonstrate biological availability of pollutants; the role of parasites as pollutant sinks; the interaction between parasites and biomarkers focusing on combined effects of parasitism and pollution on the health of their hosts; and the use of parasites as indicators of contaminants and ecosystem health. Therefore, this review highlights the application of parasites as indicators at different biological scales, from the organismal to the ecosystem.
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Affiliation(s)
- Bernd Sures
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitätsstr. 5, D-45141, Essen, Germany.,Department of Zoology, University of Johannesburg, PO Box 524, Auckland Park 2006, Johannesburg, South Africa
| | - Milen Nachev
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitätsstr. 5, D-45141, Essen, Germany.
| | - Christian Selbach
- Water Research Group, Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa
| | - David J Marcogliese
- Aquatic Contaminants Research Division, Water Science and Technology Directorate, Science and Technology Branch, Environment and Climate Change Canada, St. Lawrence Centre, 105 McGill Street, 7th floor, Montreal, QC, H2Y 2E7, Canada.,St. Andrews Biological Station, Fisheries and Oceans Canada, 531 Brandy Cove Road, St, Andrews, NB, E5B 2 L9, Canada
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Provencher JF, Forbes MR, Mallory ML, Wilson S, Gilchrist HG. Anti-parasite treatment, but not mercury burdens, influence nesting propensity dependent on arrival time or body condition in a marine bird. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 575:849-857. [PMID: 27692942 DOI: 10.1016/j.scitotenv.2016.09.130] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 09/15/2016] [Accepted: 09/16/2016] [Indexed: 06/06/2023]
Abstract
Arctic wildlife can be exposed to high mercury (Hg) levels, and are also naturally exposed to gastrointestinal parasites that can reduce condition and negatively affect reproductive output and/or survival in similar ways. Importantly, both Hg and parasites are increasing in wildlife in some Arctic regions. We studied the northern common eider duck (Somateria mollissima) to explore how Hg in association with both natural levels and experimentally reduced parasitic infections, affect reproduction and survival. Female eiders were measured, banded, and blood sampled to determine blood Hg burdens, prior to breeding. Propensity to nest, clutch size, nest survival, nest attendance, and return rates were assessed in relation to both Hg burden and parasite treatment. Neither reproduction nor return rates of females varied with Hg concentrations, but females arriving late to the colony, or in low body condition, showed increased nesting propensity when given the anti-parasite treatment as compared to placebo treatment. Our results suggest that parasites can play a critical role in decisions to invest in avian breeding annually, particularly among individuals with a late onset to breeding, and in poor condition.
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Affiliation(s)
- J F Provencher
- Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
| | - M R Forbes
- Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
| | - M L Mallory
- Department of Biology, Acadia University, Wolfville, Nova Scotia B4P 2R6, Canada.
| | - S Wilson
- Environment and Climate Change Canada, Wildlife Research Division, Raven Road, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
| | - H G Gilchrist
- Environment and Climate Change Canada, Wildlife Research Division, Raven Road, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
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Tellez M, Merchant M. Biomonitoring Heavy Metal Pollution Using an Aquatic Apex Predator, the American Alligator, and Its Parasites. PLoS One 2015; 10:e0142522. [PMID: 26555363 PMCID: PMC4640838 DOI: 10.1371/journal.pone.0142522] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 10/22/2015] [Indexed: 11/28/2022] Open
Abstract
Monitoring the bioaccumulation of chemical elements within various organismal tissues has become a useful tool to survey current or chronic levels of heavy metal exposure within an environment. In this study, we compared the bioaccumulations of As, Cd, Cu, Fe, Pb, Se, and Zn between the American alligator, Alligator mississippiensis, and its parasites in order to establish their use as bioindicators of heavy metal pollution. Concomitant with these results, we were interested to determine if parasites were more sensitive bioindicators of heavy metals relative to alligators. We found parasites collectively accumulated higher levels of As, Cu, Se, and Zn in comparison to their alligator hosts, whereas Fe, Cd, and Pb concentrations were higher in alligators. Interestingly, Fe levels were significantly greater in intestinal trematodes than their alligator hosts when analyzed independently from other parasitic taxa. Further analyses showed alligator intestinal trematodes concentrated As, Cu, Fe, Se, and Zn at significantly higher levels than intestinal nematodes and parasites from other organs. However, pentastomids also employed the role as a good biomagnifier of As. Interestingly, parasitic abundance decreased as levels of As increased. Stomach and intestinal nematodes were the poorest bioaccumulators of metals, yet stomach nematodes showed their ability to concentrate Pb at orders of magnitude higher in comparison to other parasites. Conclusively, we suggest that parasites, particularly intestinal trematodes, are superior biomagnifiers of As, Cu, Se, and Zn, whereas alligators are likely good biological indicators of Fe, Cd, and Pb levels within the environment.
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Affiliation(s)
- Marisa Tellez
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Mark Merchant
- Department of Chemistry, McNeese State University, Lake Charles, Louisiana, United States of America
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Brožová A, Jankovská I, Miholová D, Scháňková Š, Truněčková J, Langrová I, Kudrnáčová M, Vadlejch J. Heavy metal concentrations in the small intestine of red fox (Vulpes vulpes) with and without Echinococcus multilocularis infection. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:3175-3179. [PMID: 25335764 DOI: 10.1007/s11356-014-3733-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 10/15/2014] [Indexed: 06/04/2023]
Abstract
Heavy metal (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) levels in red fox small intestine samples with or without Echinococcus multilocularis infection were studied. The red foxes were taken from the open countryside of northwest Bohemia (CR). Red foxes with E. multilocularis infection had lower levels of toxic metals (Cd, Pb); cadmium levels in infected foxes (0.0052 mg/kg) were twice as low as in uninfected foxes (0.0106 mg/kg). This was the same case for lead: 0.0288 mg/kg infected red foxes (inf.) and 0.0413 mg/kg uninfected (uninf.). Conversely, red foxes with E. multilocularis infection yielded higher concentrations in comparison to their uninfected counterparts: Cr (0.0087 mg/kg uninf. and 0.0116 mg/kg inf.), Cu (0.2677 mg/kg uninf. and 0.3205 mg/kg inf.), Fe (6.46 mg/kg uninf. and 10.89 mg/kg inf.), Mn (0.1966 mg/kg uninf. and 0.2029 mg/kg inf.), Ni (0.0415 mg/kg uninf. and 0.064 mg/kg inf.) and Zn (16.71 mg/kg uninf. and 20.25 mg/kg inf). This could support the hypothesis that tapeworms are able to absorb toxic heavy metals from the host body into their tissues, as well as to modify other element concentrations in the host body.
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Affiliation(s)
- Adela Brožová
- Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, 165 21, Prague 6, Suchdol, Czech Republic
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Provencher JF, Braune BM, Gilchrist HG, Forbes MR, Mallory ML. Trace element concentrations and gastrointestinal parasites of Arctic terns breeding in the Canadian High Arctic. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 476-477:308-16. [PMID: 24472719 DOI: 10.1016/j.scitotenv.2014.01.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 01/03/2014] [Accepted: 01/06/2014] [Indexed: 05/24/2023]
Abstract
Baseline data on trace element concentrations are lacking for many species of Arctic marine birds. We measured essential and non-essential element concentrations in Arctic tern (Sterna paradisaea) liver tissue and brain tissue (mercury only) from Canada's High Arctic, and recorded the presence/absence of gastrointestinal parasites during four different phases of the breeding season. Arctic terns from northern Canada had similar trace element concentrations to other seabird species feeding at the same trophic level in the same region. Concentrations of bismuth, selenium, lead and mercury in Arctic terns were high compared to published threshold values for birds. Selenium and mercury concentrations were also higher in Arctic terns from northern Canada than bird species sampled in other Arctic areas. Selenium, mercury and arsenic concentrations varied across the time periods examined, suggesting potential regional differences in the exposure of biota to these elements. For unknown reasons, selenium concentrations were significantly higher in birds with gastrointestinal parasites as compared to those without parasites, while bismuth concentrations were higher in Arctic terns not infected with gastrointestinal parasites.
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Affiliation(s)
- J F Provencher
- Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
| | - B M Braune
- Environment Canada, Science and Technology Branch, Raven Road, Carleton University, Ottawa, Ontario K1S 5 B6, Canada
| | - H G Gilchrist
- Environment Canada, Science and Technology Branch, Raven Road, Carleton University, Ottawa, Ontario K1S 5 B6, Canada
| | - M R Forbes
- Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada
| | - M L Mallory
- Biology Department, Acadia University, 33 Westwood Avenue, Wolfville, Nova Scotia B4P 2R6, Canada
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15
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Nematode and mercury content in freshwater fish belonging to different trophic levels. Parasitol Res 2013; 112:2187-95. [DOI: 10.1007/s00436-013-3378-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 03/01/2013] [Indexed: 10/27/2022]
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MacLeod CD, Poulin R. Host–parasite interactions: a litmus test for ocean acidification? Trends Parasitol 2012; 28:365-9. [DOI: 10.1016/j.pt.2012.06.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 06/27/2012] [Accepted: 06/27/2012] [Indexed: 11/30/2022]
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The parasitic nematodes Hysterothylacium sp. type MB larvae as bioindicators of lead and cadmium: a comparative study of parasite and host tissues. Parasitology 2011; 138:1400-5. [PMID: 21816122 DOI: 10.1017/s0031182011000977] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Cadmium and lead concentrations were compared in tissues of cutlassfish, Trichiurus lepturus L., its intestinal nematode Hysterothylacium sp. type MB larvae, and in water from the same location in the Sea of Oman. Metal accumulation in hosts, parasites and sea water was measured by ICP-OES. Hysterothylacium larvae from the intestinal lumen and visceral cavity showed much higher metal concentrations than in host tissues or sea water. Statistical analyses revealed no significant differences in metal accumulation between infected and uninfected hosts. Cadmium concentration in the host muscle was lower than in intestine, liver and gonad tissues. The mean concentrations of lead and cadmium in nematodes were 289·03 and 81·5 times higher than in host intestine, 188·4 and 225 times higher than in host muscle, 108·6 and 65·3 times higher than in host gonads, 70·5 and 19·5 times higher than in host liver and 3351 and 148 times higher than in sea water. The results show the value of this and possibly related nematodes as bioindicators of heavy metals and their potential use in environmental studies.
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Robinson SA, Forbes MR, Hebert CE. Mercury in parasitic nematodes and trematodes and their double-crested cormorant hosts: bioaccumulation in the face of sequestration by nematodes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2010; 408:5439-5444. [PMID: 20797771 DOI: 10.1016/j.scitotenv.2010.07.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 07/27/2010] [Accepted: 07/29/2010] [Indexed: 05/29/2023]
Abstract
Endoparasites can alter their host's heavy metal concentrations by sequestering metals in their own tissues. Contracaecum spp. (a nematode), but not Drepanocephalus spathans (a trematode), were bioaccumulating mercury to concentrations 1.5 times above cormorant hosts. Nematodes did not have significantly greater stable nitrogen isotope values (δ(15)N) than their hosts, which is contradictory to prey-predator trophic enrichment studies, but is in agreement with other endoparasite-host relationships. However, Contracaecum spp. δ(13)C values were significantly greater than their hosts, which suggest that nematodes were consuming host tissues. Nematodes were accumulating and thus sequestering some of their cormorant hosts' body burden of methyl mercury; however, they were not dramatically reducing their hosts' accumulation of methyl mercury.
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Affiliation(s)
- Stacey A Robinson
- Department of Biology, Carleton University, 209 Nesbitt Bldg, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada.
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19
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Achiorno CL, de Villalobos C, Ferrari L. Validation test with embryonic and larval stages of Chordodes nobilii (Gordiida, Nematomorpha): sensitivity to three reference toxicants. CHEMOSPHERE 2010; 81:133-140. [PMID: 20655086 DOI: 10.1016/j.chemosphere.2010.06.076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 06/20/2010] [Accepted: 06/29/2010] [Indexed: 05/29/2023]
Abstract
Chordodes nobilii is a parasite whose pre- and postparasitic stages are found in different types of freshwater bodies. Due to the peculiarities of its life cycle, it acts as a link between freshwater bodies and terrestrial ecosystems. There is little toxicological information on the group Gordiida. It is only known that embryos and larvae of C. nobilii are sensitive to glyphosate and malathion at relevant concentrations in the environment. On this basis, the aims of this study were to characterize the sensitivity of the pre-parasitic stages of C. nobilii to three reference toxicants: sodium dodecyl sulfate (SDS), cadmium chloride and potassium dichromate (Cr(6+)), and to validate a previous experimental protocol for ecotoxicological risk assessment. The protocol involved acute exposure of early embryonic stages and larvae to the three toxicants for 96 h and 48 h, respectively. Embryo development was inhibited only by Cr(6+) which presented a IC(50) of 0.71 mg Cr(6+)L(-1). The development of the eggs exposed to SDS and those exposed to cadmium chloride showed no differences as compared to that of controls. However, the infective capacity of larvae derived from the eggs exposed to the three toxicants was lower than that of controls. Larval survival was affected even at the lowest concentration of the three toxicants assayed. In relation to other freshwater organisms, C. nobilii can be characterized as an organism medium to highly sensitive to the toxicants tested.
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20
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Vidal-Martínez VM, Pech D, Sures B, Purucker ST, Poulin R. Can parasites really reveal environmental impact? Trends Parasitol 2010; 26:44-51. [DOI: 10.1016/j.pt.2009.11.001] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2008] [Revised: 02/17/2009] [Accepted: 11/03/2009] [Indexed: 11/30/2022]
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21
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Lins DC, Meirelles ME, Malm O, Lima NRW. Mercury concentration in the freshwater bonefish Cyphocharax gilbert (Curimatidae) and its parasite the crustacean Riggia paranensis (Cymothoidae). NEOTROPICAL ICHTHYOLOGY 2008. [DOI: 10.1590/s1679-62252008000200017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fish parasites can accumulate heavy metals reaching higher concentrations than the host and may affect the host's bioaccumulation. The present study compared total mercury concentration in the liver and muscle of Cyphocharax gilbert and in the parasite Riggia paranensis sampled in the middle Itabapoana River, Brazil, also considering the reproductive stages of both fish and parasite. Mean concentrations of mercury in muscle of fish varied from 20.8 ng.g-1 in mature females to 38.1 ng.g-1 in post-spawning females. The mean concentrations in fish liver varied from 60.9 ng/g in post-spawning females to 110.4 ng.g-1 in infested males. The mean concentration of mercury in parasites varied from 26.2 ng.g-1 in specimens carrying early embryo to 39.5 ng.g-1 in specimens with eggs. Positive and significant associations (P<0.05) were found between the total mercury concentrations in parasites and muscle of host (both females and males), and between concentrations in parasites and in the liver of male hosts. These results suggest that R. paranensis can be used to indicate mercury levels in edible parts of C. gilbert.
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Affiliation(s)
| | | | - Olaf Malm
- Universidade Federal do Rio de Janeiro, Brazil
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22
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Burnett KG, Bain LJ, Baldwin WS, Callard GV, Cohen S, Di Giulio RT, Evans DH, Gómez-Chiarri M, Hahn ME, Hoover CA, Karchner SI, Katoh F, MacLatchy DL, Marshall WS, Meyer JN, Nacci DE, Oleksiak MF, Rees BB, Singer TD, Stegeman JJ, Towle DW, Van Veld PA, Vogelbein WK, Whitehead A, Winn RN, Crawford DL. Fundulus as the premier teleost model in environmental biology: opportunities for new insights using genomics. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2007; 2:257-86. [PMID: 18071578 PMCID: PMC2128618 DOI: 10.1016/j.cbd.2007.09.001] [Citation(s) in RCA: 149] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A strong foundation of basic and applied research documents that the estuarine fish Fundulus heteroclitus and related species are unique laboratory and field models for understanding how individuals and populations interact with their environment. In this paper we summarize an extensive body of work examining the adaptive responses of Fundulus species to environmental conditions, and describe how this research has contributed importantly to our understanding of physiology, gene regulation, toxicology, and ecological and evolutionary genetics of teleosts and other vertebrates. These explorations have reached a critical juncture at which advancement is hindered by the lack of genomic resources for these species. We suggest that a more complete genomics toolbox for F. heteroclitus and related species will permit researchers to exploit the power of this model organism to rapidly advance our understanding of fundamental biological and pathological mechanisms among vertebrates, as well as ecological strategies and evolutionary processes common to all living organisms.
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Affiliation(s)
- Karen G. Burnett
- Grice Marine Laboratory, College of Charleston, 205 Fort Johnson, Charleston, SC 29412, USA
| | - Lisa J. Bain
- Clemson Institute of Environmental Toxicology, Clemson University; Pendleton, SC 29670, USA
| | - William S. Baldwin
- Clemson Institute of Environmental Toxicology, Clemson University; Pendleton, SC 29670, USA
| | | | - Sarah Cohen
- Romberg Tiburon Center and Department of Biology, San Francisco State University, Tiburon, CA 94120, USA
| | - Richard T. Di Giulio
- Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC, USA
| | - David H. Evans
- Department of Zoology, University of Florida, Gainesville, FL 32611, USA
| | - Marta Gómez-Chiarri
- Department of Fisheries, Animal and Veterinary Science, University of Rhode Island, Kingston, RI 02881, USA
| | - Mark E. Hahn
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | | | - Sibel I. Karchner
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | - Fumi Katoh
- Department of Biology, St. Francis Xavier University, Antigonish, N.S. B2G 2W5, Canada
| | - Deborah L. MacLatchy
- Faculty of Science, Wilfred Laurier University, Waterloo, Ontario, Canada N2L 3C5
| | - William S. Marshall
- Department of Biology, St. Francis Xavier University, Antigonish, N.S. B2G 2W5, Canada
| | - Joel N. Meyer
- Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC, USA
| | - Diane E. Nacci
- US Environmental Protection Agency Office of Research and Development, Narragansett, RI 02882, USA
| | - Marjorie F. Oleksiak
- Rosenstiel School of Marine & Atmospheric Science, University of Miami, Miami, FL 33149, USA
| | - Bernard B. Rees
- Department of Biological Sciences, University of New Orleans, New Orleans, LA 70148, USA
| | - Thomas D. Singer
- School of Optometry, University of Waterloo, Waterloo, ON, N2L 3G1, CANADA
| | - John J. Stegeman
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | - David W. Towle
- Center for Marine Functional Genomics, Mount Desert Island Biological Laboratory, Maine 04672, USA
| | - Peter A. Van Veld
- The College of William and Mary, Virginia Institute of Marine Science, Gloucester Point, VA 23062, USA
| | - Wolfgang K. Vogelbein
- The College of William and Mary, Virginia Institute of Marine Science, Gloucester Point, VA 23062, USA
| | - Andrew Whitehead
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Richard N. Winn
- Aquatic Biotechnology and Environmental Laboratory, University of Georgia, Athens, GA 30602, USA
| | - Douglas L. Crawford
- Rosenstiel School of Marine & Atmospheric Science, University of Miami, Miami, FL 33149, USA
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23
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Mostafa OMS. Effects of Schistosoma mansoni and Schistosoma haematobium infections on calcium content in their intermediate hosts. Parasitol Res 2007; 101:963-6. [PMID: 17497170 DOI: 10.1007/s00436-007-0566-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Accepted: 04/24/2007] [Indexed: 10/23/2022]
Abstract
Flame atomic absorption spectrometry was performed to determine the alteration of calcium concentration in the soft parts and shells of Biomphalaria alexandrina and Bulinus truncatus due to the infection with Schistosoma mansoni and S. haematobium, respectively. The results showed significant lowering in the calcium content of the shells of cercariae shedding B. alexandrina and B. truncatus relative to the calcium content in the shells of uninfected ones. In contrast, the calcium content in the soft parts of cercariae shedding snails was higher than in the soft parts of uninfected snails; the differences were statistically significant. Generally, calcium content was significantly higher in the shells than in the soft parts of the snails, regardless infected or uninfected. The results obtained and the hypothesis of hypercalcification in shells of infected snails were discussed.
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Vidal-Martínez VM, Aguirre-Macedo ML, Del Rio-Rodríguez R, Gold-Bouchot G, Rendón-von Osten J, Miranda-Rosas GA. The pink shrimp Farfantepenaeus duorarum, its symbionts and helminths as bioindicators of chemical pollution in Campeche Sound, Mexico. J Helminthol 2007; 80:159-74. [PMID: 16768859 DOI: 10.1079/joh2006358] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The pink shrimp Farfantepenaeus duorarum may acquire pollutants, helminths and symbionts from their environment. Statistical associations were studied between the symbionts and helminths of F. duorarum and pollutants in sediments, water and shrimps in Campeche Sound, Mexico. The study area spatially overlapped between offshore oil platforms and natural shrimp mating grounds. Spatial autocorrelation of data was controlled with spatial analysis using distance indices (SADIE) which identifies parasite or pollutant patches (high levels) and gaps (low levels), expressing them as clustering indices compared at each point to produce a measure of spatial association. Symbionts included the peritrich ciliates Epistylis sp. and Zoothamnium penaei and all symbionts were pooled. Helminths included Hysterothylacium sp., Opecoeloides fimbriatus, Prochristianella penaei and an unidentified cestode. Thirty-five pollutants were identified, including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), pesticides and heavy metals. The PAHs (2-3 ring) in water, unresolved complex mixture (UCM), Ni and V in sediments, and Zn, Cr and heptachlor in shrimps were significantly clustered. The remaining pollutants were randomly distributed in the study area. Juvenile shrimps acquired pesticides, PAHs (2-3 rings) and Zn, while adults acquired PAHs (4-5 rings), Cu and V. Results suggest natural PAH spillovers, and continental runoff of dichlorodiphenyltrichloroethane (DDT), PCBs and PAHs (2-3 ring). There were no significant associations between pollutants and helminths. However, there were significant negative associations of pesticides, UCM and PCBs with symbiont numbers after controlling shrimp size and spatial autocorrelation. Shrimps and their symbionts appear to be promising bioindicators of organic chemical pollution in Campeche Sound.
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Affiliation(s)
- V M Vidal-Martínez
- Laboratories of Parasitology and Marine Geochemistry, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN) Unidad Mérida, Carretera Antigua a Progreso Km. 6, 97310 Mérida, Yucatán, México.
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25
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Azevedo JDS, Silva LGD, Bizerri CRSF, Dansa-Petretski MA, Lima NRW. Infestation pattern and parasitic castration of the crustacean Riggia paranensis (Crustacea: Cymothoidea) on the fresh water fish Cyphocharax gilbert (Teleostei: Curimatidae). NEOTROPICAL ICHTHYOLOGY 2006. [DOI: 10.1590/s1679-62252006000300008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cyphocharax gilbert infested by Riggia paranensis shows parasitic castration. The prevalence of parasitism in C. gilbert varied among different environments, being higher in the middle rio Itabapoana. Fish were collected monthly using two cast nets (thrown 30 times during the day) and gillnets kept in the river during 12 hour, from sunset to sunrise, between September 1997 and August 2000. Infestation pattern was investigated on 1358 specimens. Most of them were infested (57.9%), with one or two parasites; the majority (62.9%) was collected during the rainy season (spring-summer). The parasite did not show preference for sex or size of hosts. A total of 91.5% of the 511 examined parasites had a body size that represented 10.1% to 20% of host standard length. The reproductive condition of 311 specimens of R. paranensis was analyzed checking the presence of oocytes in the ovarian and eggs or embryos in the marsupium. Nearly 73% of them were at reproductive phase, and had a body size that represented 5.1% to 20% of host standard length. The size of the immature parasites varied from 0.1% to 5% of the host size. The results suggest that R. paranensis may adopt a fast growth rate strategy and increase the investment in reproduction when they occupy most of the host's pericardial space.
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26
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Harris CE, Vogelbein WK. Parasites of Mummichogs, Fundulus heteroclitus, from the York River, Virginia, U.S.A., with a Checklist of Parasites of Atlantic Coast Fundulus Spp. COMP PARASITOL 2006. [DOI: 10.1654/41716.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Ong JHL, Chejlava M, Fried B, Koehnlein KM, Bosavage GL, Sherma J. Effects of Schistosoma mansoni infection on inorganic elements in the snail Biomphalaria glabrata. J Helminthol 2004; 78:343-6. [PMID: 15575993 DOI: 10.1079/joh2004244] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Inductively coupled plasma atomic emission spectrometry (ICP-AES) was used to study element ions in whole bodies of uninfected Biomphalaria glabrata snails and those experimentally infected with larval Schistosoma mansoni trematodes. Infected snails were analysed 8 weeks post-infection. Cohort snails that were left uninfected were analysed at the same time as the infected snails. Sixteen elements (aluminum, boron, barium, calcium, cadmium, copper, iron, potassium, magnesium, manganese, sodium, nickel, lead, selenium, tin and zinc) were found to be present in infected and uninfected whole bodies at concentrations above the detection limit of the ICP-AES analysis. Of these, calcium, cadmium, manganese and sodium were present in significantly higher amounts (Student's t-test, P<0.05) in whole infected versus whole uninfected snails. Variations in the present results compared with other studies reflect intrinsic differences in the larval trematode-snail systems used.
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Affiliation(s)
- J H L Ong
- Department of Chemistry, Lafayette College, Easton, PA 18042, USA
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28
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Sures B. Environmental parasitology: relevancy of parasites in monitoring environmental pollution. Trends Parasitol 2004; 20:170-7. [PMID: 15099556 DOI: 10.1016/j.pt.2004.01.014] [Citation(s) in RCA: 197] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Bernd Sures
- Zoology I, Department of Ecology and Parasitology, University of Karlsruhe, Kornblumenstrasse 13, D-76128 Karlsruhe, Germany.
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Sures B, Dezfuli BS, Krug HF. The intestinal parasite Pomphorhynchus laevis (Acanthocephala) interferes with the uptake and accumulation of lead (210Pb) in its fish host chub (Leuciscus cephalus). Int J Parasitol 2003; 33:1617-22. [PMID: 14636677 DOI: 10.1016/s0020-7519(03)00251-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Uninfected chub as well as fish experimentally infected with the acanthocephalan parasite Pomphorhynchus laevis were exposed to (210)Pb(2+) for up to 38 days and the uptake and distribution of lead within different fish organs and the parasites was determined at various time points. Highest metal concentrations were detected in the acanthocephalans, followed by intestine, bile, liver, gill and muscle of the fish host. Infected chub had significantly lower (210)Pb levels in the gills on day 17 (P< or =0.01), in the bile on day 24 (P< or =0.05) and in the gills as well as in the intestine on day 38 compared with uninfected fish. A subsequent polynomial regression revealed that lead levels for the infected fish ranged below the levels determined for uninfected fish during most of the exposure period. This is the first proof that P. laevis reduces lead levels in the bile thereby diminishing or even impeding the hepatic intestinal cycling of lead, which may reduce the amount of metals available for the fish organs. This is especially important for ecotoxicological research. For example, organisms used as accumulation indicators may erroneously indicate low levels of pollution if they are infected with parasites which alter their pollutant uptake mechanisms. Additionally, the results gave further experimental evidence for acanthocephalans as accumulation indicators for metals.
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Affiliation(s)
- Bernd Sures
- Zoologisches Institut I Okologie-Parasitologie, Universität Karlsruhe, Kornblumenstrasse 13, D-76128 Karlsruhe, Germany.
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Abstract
Eight major reviews are cited to indicate a recent knowledge explosion on the use of marine parasites as potential indicators of pollution. A literature update is given for the period 1995–2001. An analysis of the publications cited is used to provide 10 refined criteria for selecting parasites as indicator/monitor species. Previously unpublished data on Diclidophora merlangi and Dictyocotyle coeliaca confirm their value as potential indicators of hydrocarbon pollution in the North Sea. An extensive knowledge of D. merlangi is summarised to emphasize its potential value as an indicator species and also to encourage studies on the health status and immune responses of its host when subjected to pollutant stressors and infection with this monogenean. A discussion focuses on publications which have reported significant recent advances in this area of research and also on accompanying issues, problems and controversies. These selected publications are used to suggest species, stages in the development of species and assemblages of species worthy of further more detailed investigations into their value as indicators/monitors of pollution. It is predicted that further good progress will be made when contaminants can be accurately identified, their precise effects on both host and parasite can be measured by histochemical and biological methods and the roles of contaminants and parasites in causing disease can be assessed separately. About 100 references are cited.
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Affiliation(s)
- H H Williams
- Department of Ecology & Evolutionary Biology, University of Connecticut, 75 N. Eagleville Road, Storrs 06269-3043, USA
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