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Pieter T J Johnson - One of the best experts on this subject based on the ideXlab platform.
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biogeography of the freshwater gastropod Planorbella trivolvis in the western united states
PLOS ONE, 2020Co-Authors: Kelly R Martin, Pieter T J Johnson, Jay BowermanAbstract:Despite the important roles of freshwater gastropods in aquatic ecosystems, the taxonomic status of many taxa is unclear, which is compounded by a lack of information on species population genetic structuring, distribution, and dispersal patterns. The objective of this study was to address the biogeography of the freshwater snail Planorbella trivolvis (Gastropoda: Planorbidae) in the western United States. We amplified two genetic markers (16S, COI) from individuals belonging to western USA populations and downloaded genetic data from GenBank. We utilized minimum spanning networks to assess the genetic patterns and performed Analysis of Molecular Variance and linear regression analyses to determine how geographic distance and watershed identity contributed to the observed genetic structuring. For both markers, we found that the majority of genetic variation was associated within and among populations, rather than among watersheds. Correspondingly, there was no significant effect of geographic distance on genetic distance, suggesting that long-distance dispersal was promoting gene flow between populations. The genetic similarity could reflect avian-mediated dispersal of snails along the Pacific Flyway, a major waterfowl migratory corridor. Further analysis of the population structuring across North America revealed East-West genetic structuring, suggesting that across longitudinal gradients P. trivolvis experiences significant genetic isolation.
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high temperature enhances host pathology in a snail trematode system possible consequences of climate change for the emergence of disease
Freshwater Biology, 2011Co-Authors: Sara H Paull, Pieter T J JohnsonAbstract:Summary 1. Disease severity may be altered by the differential responses of hosts and parasites to rising temperatures leading to an increase or reduction in disease. The net effect of climate change on emerging diseases will reflect the effects of temperature on all life history stages of both hosts and parasites. 2. To explore how climate change differentially influences hosts and parasites, we studied the effect of increasing temperatures on different life stages of the multi-host trematode parasite Ribeiroia ondatrae, which has been linked to the emerging phenomenon of amphibian limb malformations, and its snail intermediate host Planorbella trivolvis. We determined the effects of temperature on the development of R. ondatrae eggs and redia larvae and the effects of parasite exposure (exposed and sham-exposed), temperature (13, 20, and 26 °C) and their interaction on snail host vital rates, including growth, mortality and reproduction. 3. Ribeiroia eggs developed four times faster at 26 °C than at 17 °C and did not develop at 12 °C. Higher temperatures increased snail growth, egg production and mortality. Infection interacted with temperature to enhance the growth of infected snails while reducing their fecundity at 26 °C. These results suggest that pathology associated with infection is amplified at higher temperatures. 4. The timing of interactions between R. ondatrae and P. trivolvis may be influenced by their physiological responses to temperature. Temperature-driven increases in the growth of infected snails coupled with the cessation of parasite development at lower temperatures suggest that warming temperatures will change host–parasite dynamics. Taken together, these results indicate that future climate change could alter parasite abundance and pathology by creating a ‘phenological mismatch’ between snail hosts and parasites, potentially leading to infection of both snail and amphibian hosts in earlier and, in the case of amphibians, more vulnerable stages of development.
David J. Wise - One of the best experts on this subject based on the ideXlab platform.
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Clinostomum poteae n. sp. (Digenea: Clinostomidae), in the trachea of a double-crested cormorant Phalacrocorax auritus Lesson, 1831 and molecular data linking the life-cycle stages of Clinostomum album Rosser, Alberson, Woodyard, Cunningham, Pote & G
Systematic Parasitology, 2018Co-Authors: Thomas G. Rosser, Wes A. Baumgartner, Neely R. Alberson, Travis W. Noto, Ethan T. Woodyard, D. Tommy King, David J. Wise, Matt J. GriffinAbstract:Clinostomum spp. (Digenea: Clinostomidae) are a group of trematodes commonly found in the buccal cavity and oesophagus of a variety of piscivorous birds. The metacercariae, colloquially known as “yellow grubs,” have been reported from a diverse group of freshwater fishes worldwide. In the catfish farming region of the southeastern USA, piscivorous birds present a continuous challenge for aquaculturists in the form of fish depredation and the introduction of trematodes into these static, earthen pond systems. Clinostomum spp. are commonly encountered in farm-raised catfish. While generally considered pests of minimal importance, heavy infections can result in unmarketable fillets. Of the piscivorous birds that frequent catfish aquaculture operations in the southeastern US, the double-crested cormorant ( Phalacrocorax auritus Lesson) is one of the most damaging, although reports of Clinostomum spp. from P. auritus are limited. In this study, adult trematodes morphologically consistent with Clinostomum sp. were found in the trachea of a double-crested cormorant captured in Lowndes Co., Mississippi, USA. These specimens differed from other recognised Clinostomum spp. in several key morphological characters. Moreover, sequence data of mitochondrial cytochrome c oxidase subunit 1 gene ( cox 1), nicotinamide adenine dinucleotide dehydrogenase subunit 1 gene ( nad 1) and ribosomal internal transcribed spacer (ITS) regions did not match any known Clinostomum sp. for which sequence data are available. While genetically similar to C. marginatum and C. album Rosser, Alberson, Woodyard, Cunningham, Pote & Griffin, 2017 reported from the great egret Ardea alba L. in Mississippi, these adult clinostomids were larger in size and limited to the trachea, whereas both C. marginatum Rudolphi, 1819 and C. album are found in the oral cavity and esophagus. Given these distinct morphological and molecular characters we propose a new member of the genus, known hereafter as Clinostomum poteae n. sp. Additionally, larval stages in the life-cycle of C. album are morphologically and molecularly identified for the first time from ramshorn snails Planorbella trivolvis Say and fathead minnows Pimephales promelas Rafinesque.
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north and south american haplotypes of drepanocephalus auritus digenea echinostomatidae are released from biomphalaria havanensis mollusca planorbidae inhabiting catfish aquaculture ponds in mississippi u s a
Comparative Parasitology, 2017Co-Authors: Neely R. Alberson, Thomas G. Rosser, Ethan T. Woodyard, David J. Wise, Lester H Khoo, Linda M Pote, Sarah K Buddenborg, Eric S Loker, Terry D Richardson, Matt J. GriffinAbstract:Trematodes of the subclass Digenea are a major impediment to catfish aquaculture in the southeastern United States. Catfish production ponds are ideal feeding grounds for piscivorous birds, and given the variety of aquatic snails that inhabit these ponds, they offer a prime environment for the propagation of digenetic life cycles. In July 2014, snails morphologically consistent with Biomphalaria havanensis L. Pfeiffer, 1839, were collected from 2 different catfish production ponds in the catfish farming region of eastern Mississippi. These snails were refractory to Schistosoma mansoni Sambon, 1907, infection, and phylogenetic analyses based on internal transcribed spacer (ITS)1 and ITS2 fragments placed the snails within the B. havanensis/obstructa complex. Some (1.5%) of these snails shed cercariae morphologically and molecularly consistent with Drepanocephalus auritus Kudlai, Kostadinova, Pulis, and Tkach, 2015 (formerly reported as Drepanocephalus spathans Dietz, 1909), an echinostomatid parasite of the double-crested cormorant Phalacrocorax auritus Lesson, 1831, and channel catfish Ictalurus punctatus Rafinesque, 1818. Juvenile channel catfish were challenged individually with ∼275 cercariae of D. auritus per fish, resulting in limited mortality (2 out of 10 fish). Surviving fish were euthanatized 7 d postchallenge, and the presence of metacercariae was confirmed histologically. Parasite-associated pathology was consistent with previous studies. Subsequent molecular analysis of 5 different gene targets confirmed morphological identifications. Previous research has suggested the existence of discrete North American and South American haplotypes of D. auritus. Mitochondrial cytochrome c oxidase subunit 1 and nicotinamide adenine dinucleotide dehydrogenase subunit 1 sequences demonstrated that both haplotypes were released by snails in this study, suggesting a broader distribution of these genetic variants than previously thought. Along with Planorbella trivolvis Say, 1817, this work identifies a second snail species common to catfish aquaculture ponds that releases D. auritus infective to juvenile channel catfish and is the first report of B. havanensis as an intermediate host for D. auritus in North America.
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genetic sequence data identifies the cercaria of drepanocephalus spathans digenea echinostomatidae a parasite of the double crested cormorant phalacrocorax auritus with notes on its pathology in juvenile channel catfish ictalurus punctatus
Journal of Parasitology, 2012Co-Authors: Matt J. Griffin, Lester H Khoo, Sylvie M A Quiniou, Mary Ohear, Linda M Pote, Terrence E Greenway, David J. WiseAbstract:Abstract: An unidentified xiphidio-type cercaria, previously thought inconsequential to catfish health, was found to be released from marsh rams-horn snails (Planorbella trivolvis) inhabiting ponds on a commercial catfish operation in the Mississippi Delta. A preliminary challenge of cohabiting channel catfish (Ictalurus punctatus) with snails actively shedding the unidentified cercariae resulted in death of some fish. A second cohabitation trial yielded similar results, as did a third challenge of 250 cercariae/fish. Histopathology revealed developing metacercariae concentrated in the cranial region, especially within the branchial chamber, with several metacercariae at the base of the branchial arches within, or adjacent to, blood vessels, possibly the proximate cause of death. Genetic sequence analysis of the 18S small subunit ribosomal DNA (ssDNA), 28S large subunit rDNA (lsDNA), and cytochrome oxidase (Cox1) genes all matched the cercariae to Drepanocephalus spathans (Digenea: Echinostomatidae), a pa...
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molluscicidal activity of vulgarone b against ram s horn snail Planorbella trivolvis
Pest Management Science, 2004Co-Authors: Kumudini M Meepagala, David J. Wise, George Sturtz, Charles C Mischke, Stephen O DukeAbstract:The ram's horn snail (Planorbella trivolvis (Say)) is an intermediate host for a digenetic trematode (Bolbophorus confusus (Krause) Dubois) that has recently been discovered to be a significant problem in commercial channel catfish (Ictalurus punctatus Raf) production ponds in the Mississippi Delta region in the USA. In these catf ish ponds, the digenetic life cycle of this parasitic trematode involves two intermediate hosts, the ram's horn snail and the channel catfish, and the final host, the American white pelican (Pelecanus erythrorhynchos Gmelin). One approach to eradicate this problem is to disrupt the life cycle of the parasitic trematodes by eliminating the snails. During our search for natural-product-based molluscicides to control the snails in the catfish ponds, vulgarone B, isolated from the steam distillate of the aerial parts of the plant Artemisia douglasiana Besser (Asteraceae), was found to be active towards the snails with a LC50 of ca 24 µM. Channel catfish toxicity studies indicated a LC50 of ca 207 µM. Vulgarone B may be an environmentally acceptable alternative for snail control in aquaculture. 2004 Society of Chemical Industry
Andrew J Mitchell - One of the best experts on this subject based on the ideXlab platform.
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effect of citric acid copper sulfate concentration and temperature on a pond shoreline treatment for control of the marsh rams horn snail Planorbella trivolvis and the potential toxicity of the treatment to channel catfish
North American Journal of Aquaculture, 2003Co-Authors: Andrew J Mitchell, Melissa S HobbsAbstract:Abstract Tests were run to determine whether any refinements were warranted in an established copper sulfate–citric acid pond shoreline treatment (Environmental Protection Agency registration number 1278–8) for aquatic marsh rams-horn snails Planorbella trivolvis. The treatments applied in these studies consisted of two levels (full and half) of copper sulfate (CuSO4; 589 and 294.5 g) with and without citric acid (CA; 58.9 and 0 g) that were delivered in a 2-m swath 10-m length of shoreline. In research ponds, shoreline treatments without CA were significantly more effective against the snails than the treatments with CA. The full CuSO4 treatment without CA was significantly more effective than the half treatment without CA at all temperatures tested below 35°C. There was a significant reduction in the effectiveness of the full treatment without CA at 17 ± 0.5°C (40% snail survival), while snail survival (average, 3.2%) in the trials run at 21.5, 23, 26, and 35°C was not significantly different from each ...
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a copper sulfate citric acid pond shoreline treatment to control the rams horn snail Planorbella trivolvis
North American Journal of Aquaculture, 2002Co-Authors: Andrew J MitchellAbstract:Abstract The rams-horn snail Planorbella trivolvis carries at least two important digenetic trematodes that infect propagated fish species in the southeastern United States. These snails are found in fish production ponds, and there are no proven chemical methods for eliminating them that would not also kill the fish. Application of an aqueous solution of 589 g of copper sulfate and 58.9 g of citric acid per 10 linear meters in a 2-m-wide swath along the pond shoreline produced an effective treatment. This would give an instantaneous treatment rate of about 59 ppm if the water in the 2-m swath averaged 0.5 m deep. In two separate trials, there was a significant difference in snail survival in the treated and sham-treated ponds. Average survival was 2.2% and 0% in the treatment ponds and 63.3% and 77.8% in the sham treatment ponds.
Matt J. Griffin - One of the best experts on this subject based on the ideXlab platform.
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Clinostomum poteae n. sp. (Digenea: Clinostomidae), in the trachea of a double-crested cormorant Phalacrocorax auritus Lesson, 1831 and molecular data linking the life-cycle stages of Clinostomum album Rosser, Alberson, Woodyard, Cunningham, Pote & G
Systematic Parasitology, 2018Co-Authors: Thomas G. Rosser, Wes A. Baumgartner, Neely R. Alberson, Travis W. Noto, Ethan T. Woodyard, D. Tommy King, David J. Wise, Matt J. GriffinAbstract:Clinostomum spp. (Digenea: Clinostomidae) are a group of trematodes commonly found in the buccal cavity and oesophagus of a variety of piscivorous birds. The metacercariae, colloquially known as “yellow grubs,” have been reported from a diverse group of freshwater fishes worldwide. In the catfish farming region of the southeastern USA, piscivorous birds present a continuous challenge for aquaculturists in the form of fish depredation and the introduction of trematodes into these static, earthen pond systems. Clinostomum spp. are commonly encountered in farm-raised catfish. While generally considered pests of minimal importance, heavy infections can result in unmarketable fillets. Of the piscivorous birds that frequent catfish aquaculture operations in the southeastern US, the double-crested cormorant ( Phalacrocorax auritus Lesson) is one of the most damaging, although reports of Clinostomum spp. from P. auritus are limited. In this study, adult trematodes morphologically consistent with Clinostomum sp. were found in the trachea of a double-crested cormorant captured in Lowndes Co., Mississippi, USA. These specimens differed from other recognised Clinostomum spp. in several key morphological characters. Moreover, sequence data of mitochondrial cytochrome c oxidase subunit 1 gene ( cox 1), nicotinamide adenine dinucleotide dehydrogenase subunit 1 gene ( nad 1) and ribosomal internal transcribed spacer (ITS) regions did not match any known Clinostomum sp. for which sequence data are available. While genetically similar to C. marginatum and C. album Rosser, Alberson, Woodyard, Cunningham, Pote & Griffin, 2017 reported from the great egret Ardea alba L. in Mississippi, these adult clinostomids were larger in size and limited to the trachea, whereas both C. marginatum Rudolphi, 1819 and C. album are found in the oral cavity and esophagus. Given these distinct morphological and molecular characters we propose a new member of the genus, known hereafter as Clinostomum poteae n. sp. Additionally, larval stages in the life-cycle of C. album are morphologically and molecularly identified for the first time from ramshorn snails Planorbella trivolvis Say and fathead minnows Pimephales promelas Rafinesque.
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north and south american haplotypes of drepanocephalus auritus digenea echinostomatidae are released from biomphalaria havanensis mollusca planorbidae inhabiting catfish aquaculture ponds in mississippi u s a
Comparative Parasitology, 2017Co-Authors: Neely R. Alberson, Thomas G. Rosser, Ethan T. Woodyard, David J. Wise, Lester H Khoo, Linda M Pote, Sarah K Buddenborg, Eric S Loker, Terry D Richardson, Matt J. GriffinAbstract:Trematodes of the subclass Digenea are a major impediment to catfish aquaculture in the southeastern United States. Catfish production ponds are ideal feeding grounds for piscivorous birds, and given the variety of aquatic snails that inhabit these ponds, they offer a prime environment for the propagation of digenetic life cycles. In July 2014, snails morphologically consistent with Biomphalaria havanensis L. Pfeiffer, 1839, were collected from 2 different catfish production ponds in the catfish farming region of eastern Mississippi. These snails were refractory to Schistosoma mansoni Sambon, 1907, infection, and phylogenetic analyses based on internal transcribed spacer (ITS)1 and ITS2 fragments placed the snails within the B. havanensis/obstructa complex. Some (1.5%) of these snails shed cercariae morphologically and molecularly consistent with Drepanocephalus auritus Kudlai, Kostadinova, Pulis, and Tkach, 2015 (formerly reported as Drepanocephalus spathans Dietz, 1909), an echinostomatid parasite of the double-crested cormorant Phalacrocorax auritus Lesson, 1831, and channel catfish Ictalurus punctatus Rafinesque, 1818. Juvenile channel catfish were challenged individually with ∼275 cercariae of D. auritus per fish, resulting in limited mortality (2 out of 10 fish). Surviving fish were euthanatized 7 d postchallenge, and the presence of metacercariae was confirmed histologically. Parasite-associated pathology was consistent with previous studies. Subsequent molecular analysis of 5 different gene targets confirmed morphological identifications. Previous research has suggested the existence of discrete North American and South American haplotypes of D. auritus. Mitochondrial cytochrome c oxidase subunit 1 and nicotinamide adenine dinucleotide dehydrogenase subunit 1 sequences demonstrated that both haplotypes were released by snails in this study, suggesting a broader distribution of these genetic variants than previously thought. Along with Planorbella trivolvis Say, 1817, this work identifies a second snail species common to catfish aquaculture ponds that releases D. auritus infective to juvenile channel catfish and is the first report of B. havanensis as an intermediate host for D. auritus in North America.
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genetic sequence data identifies the cercaria of drepanocephalus spathans digenea echinostomatidae a parasite of the double crested cormorant phalacrocorax auritus with notes on its pathology in juvenile channel catfish ictalurus punctatus
Journal of Parasitology, 2012Co-Authors: Matt J. Griffin, Lester H Khoo, Sylvie M A Quiniou, Mary Ohear, Linda M Pote, Terrence E Greenway, David J. WiseAbstract:Abstract: An unidentified xiphidio-type cercaria, previously thought inconsequential to catfish health, was found to be released from marsh rams-horn snails (Planorbella trivolvis) inhabiting ponds on a commercial catfish operation in the Mississippi Delta. A preliminary challenge of cohabiting channel catfish (Ictalurus punctatus) with snails actively shedding the unidentified cercariae resulted in death of some fish. A second cohabitation trial yielded similar results, as did a third challenge of 250 cercariae/fish. Histopathology revealed developing metacercariae concentrated in the cranial region, especially within the branchial chamber, with several metacercariae at the base of the branchial arches within, or adjacent to, blood vessels, possibly the proximate cause of death. Genetic sequence analysis of the 18S small subunit ribosomal DNA (ssDNA), 28S large subunit rDNA (lsDNA), and cytochrome oxidase (Cox1) genes all matched the cercariae to Drepanocephalus spathans (Digenea: Echinostomatidae), a pa...
Lisa K. Belden - One of the best experts on this subject based on the ideXlab platform.
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hatching of echinostoma trivolvis miracidia in response to snail host and non host chemical cues
Parasitology Research, 2009Co-Authors: Lisa K. Belden, Pamela D Widder, Lauren R Fischer, Ashlee B Carter, Jeremy M WojdakAbstract:Environmental cues are used by many organisms to time life history transitions and can be important for trematode host location. However, while much is understood about how larval trematodes locate hosts, much less is known about the potential role of host cues in the timing of trematode egg development and hatching. We addressed the potential role of host chemical cues in mediating hatching of Echinostoma trivolvis miracidia by comparing hatching in response to cues from the first intermediate host (the snail Planorbella trivolvis), a non-host snail (the snail Goniobasis proxima), and a non-host invertebrate (earthworm, Lumbricus terrestris). We hypothesized that in the presence of cues from their first intermediate host, E. trivolvis would hatch sooner and would be more synchronized than when host cues were absent. However, we found that hatching was unaffected by our cue treatments. In all treatments, hatching uniformly began at 13 days and was nearly evenly spread over the next 3 weeks.
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Effects of Atrazine and Metolachlor on the Survivorship and Infectivity of Echinostoma trivolvis Trematode Cercariae
Archives of Environmental Contamination and Toxicology, 2008Co-Authors: Jennifer L. Griggs, Lisa K. BeldenAbstract:Parasites play important roles in ecosystems and can be impacted by chemical inputs. In a series of experiments, we examined the impact of two common herbicides, metolachlor and atrazine, on a host–parasite system consisting of the trematode, Echinostoma trivolvis and its two intermediate hosts, the snail Planorbella trivolvis and larval Rana spp. tadpoles. Metolachlor and atrazine are two widely used agricultural herbicides that inhibit the growth of pre-emergent vegetation. Residues of these pesticides are commonly found in water bodies near agricultural areas. In our first experiment in the laboratory, we examined changes in survivorship when free-living trematode cercariae were exposed to a low concentration (10 ppb: 15 ppb) and high concentration (85 ppb: 100 ppb) mixture of metolachlor and atrazine, respectively. These exposure levels were chosen to represent the higher end of levels that have been documented in aquatic systems. There was a significant decline in cercarial survivorship in the high concentration treatment at 14 hours. In our second experiment, we exposed the parasites, the second intermediate host tadpoles, or both the parasites and the tadpoles, to the pesticide mixtures for a maximum of 10 hours prior to infection and examined subsequent tadpole infection levels. The atrazine and metolachlor mixtures had no significant effects on parasite load, although newly shed cercariae were more likely than 10-hour-old cercariae to infect tadpoles. In our final experiment, we utilized outdoor mesocosms to expose parasites, infected snail hosts, and Rana sylvatica tadpoles to the pesticide mixtures for two weeks and examined differences in tadpole parasite loads. The pesticides had no significant effect on tadpole parasite loads in the mesocosms. Overall, our findings suggest that atrazine and metolachlor mixtures at the doses we examined do not significantly alter the short-term dynamics of Echinostoma trivolvis infection in aquatic systems.