North and South American Haplotypes of<i>Drepanocephalus auritus</i>(Digenea: Echinostomatidae) Are Released from<i>Biomphalaria havanensis</i>(Mollusca: Planorbidae) Inhabiting Catfish Aquaculture Ponds in Mississippi, U.S.A.

Alberson, Neely R.; Rosser, Thomas G.; Buddenborg, Sarah Kay; Khoo, Lester H.; Loker, Eric S.; Richardson, Terry D.; Woodyard, Ethan T.; Wise, David J.; Pote, Linda M.; Griffin, Matt J.

doi:10.1654/1525-2647-84.2.87

Cited by 10 publications

(10 citation statements)

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“…These experimental findings note disparity in mortality patterns between two trematode species endemic to catfish aquaculture in the southeastern USA. In previous controlled experiments, most mortality associated with D. auritus occurs within the first 48 h, with death attributed to the occlusion of blood vessels in the branchial arches during metacercarial encystment (Griffin et al , ; Alberson et al ). In contrast, mortality attributed to B. damnificus appears associated with host physiological changes in response to parasite development rather than mechanical disruption of host tissue function.…”

Section: Discussionmentioning

confidence: 99%

“…A magnetic stir bar was added to the flask, and cercariae were gently stirred. While stirring, 10 aliquots of 100 μL were collected and placed as separate droplets on a plastic petri dish, similar to the methods used in previous studies (Yost ; Griffin et al , ; Rosser et al ; Alberson et al ). Cercariae in each droplet were counted using a Nikon SMZ‐U stereoscopic microscope (Nikon Instruments, Melville, NY, USA).…”

Section: Methodsmentioning

confidence: 99%

“…The availability of a confined food source in catfish aquaculture ponds provides a prime foraging opportunity for piscivorous birds, resulting in significant losses to bird depredation (Glahn and King ). In addition to depredation losses, piscivorous birds also transmit several species of trematodes to these static production systems, two of which ( Bolbophorus damnificus and Drepanocephalus auritus ) are known to cause mortality in juvenile channel catfish, Ictalurus punctatus (Levy et al ; Yost ; Griffin et al ; Kudlai et al ; Alberson et al ).…”

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Encapsulation of Bolbophorus damnificus (Digenea: Bolbophoridae) Metacercariae in Juvenile Channel Catfish, Ictalurus punctatus, Is Linked to Delayed‐onset Mortality

Griffin

Khoo

Reichley

et al. 2017

J World Aquaculture Soc

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Bolbophorus damnificus (Digenea: Bolbophoridae) causes significant economic losses in catfish aquaculture in the southeastern USA. To determine mortality trends associated with B. damnificus exposure, three separate disease challenges were conducted. The first challenge exposed channel catfish, Ictalurus punctatus, fingerlings (7–13 cm) to approximately 285 B. damnificus cercariae/L, while the second exposed fish to approximately 215 cercaria/L. Fish were monitored for morbidity and mortality for 28 d. In both studies, mortality first occurred 8 d postchallenge (PC) and peaked at 9 and 10 d PC, respectively. Mortality had subsided by 14 d PC, with only sporadic mortality occurring >15 d PC. Dead and moribund fish presented with lesions consistent with B. damnificus infection. A third challenge was performed to record histological changes associated with parasite development from initial exposure up to the cessation of mortality. Catfish (2–5 cm) were exposed as described above to a range covering 0, 35, 70, 100, 150, 175, and 215 cercariae/L. Each day, two fish were sampled from each treatment. Mortality trends were consistent with previous challenges. The mortality window coincided with parasite encapsulation, neovascularization, and development of the host‐derived cyst, suggesting that morbidity and mortality are linked to host pathophysiological changes in response to metacercariae encapsulation.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Encapsulation of Bolbophorus damnificus (Digenea: Bolbophoridae) Metacercariae in Juvenile Channel Catfish, Ictalurus punctatus, Is Linked to Delayed‐onset Mortality

Griffin

Khoo

Reichley

et al. 2017

J World Aquaculture Soc

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“…Clinostomid cercariae collected from infected snails were pooled into a 500-ml beaker, the water was gently agitated with a magnetic stir bar, and the average number of cercariae per milliliter was determined from ten 0.1 ml aliquots according to previously established protocols (Griffin et al, 2012(Griffin et al, , 2014Rosser et al, 2016b;Alberson et al, 2017). Channel catfish fingerlings (c.2-4 cm) reared indoors for infectious disease research at the Thad Cochran National Warmwater Aquaculture Center in Stoneville, MS, were used in infectivity studies.…”

Section: Fish Experimental Challengesmentioning

confidence: 99%

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 & Griffin, 2017 in Mississippi, USA

et al. 2018

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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 (cox1), nicotinamide adenine dinucleotide dehydrogenase subunit 1 gene (nad1) 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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“…Pond‐raised ictalurid catfish culture is the largest sector of the US aquaculture industry, accounting for >$360 million in sales during 2018 (USDA, 2018). The aggregation of farms and density of catfish within aquaculture ponds have provided ideal foraging grounds for many piscivorous birds, such as the American white pelican Pelecanus erythrorhynchos , great blue heron Ardea herodias , great egret Ardea alba and double‐crested cormorant Phalacrocorax auritus , creating an excellent environment for the successful transmission of trematode parasites (Alberson et al, 2017; Glahn & King, 2004; Griffin et al, 2012; Kudlai, Kostadinova, Pulis, & Tkach, 2015; Levy et al, 2002; Rosser et al, 2016a,b, 2017; Yost, Pote, Wise, Dorr, & Richardson, 2009). Since the late 1990's, Bolbophorus spp.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Bolbophorus damnificus prevalence and cercariae shedding in Planorbella trivolvis populations from catfish aquaculture ponds in Mississippi, USA

Gunn

Allen

Rosser

et al. 2020

J World Aquaculture Soc

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Bolbophorus damnificus (Digenea: Bolbophoridae) causes significant losses in US catfish aquaculture. Little is known regarding the prevalence of infected snail hosts during outbreaks. To assess prevalence of snails observed shedding Bolbophorus spp. cercariae, as well as snails that were infected but not observed shedding cercariae, Planorbella trivolvis (n = 8,159) were collected from 14 catfish production ponds with B. damnificus activity in Mississippi, USA. Individual snails were placed in 10 ml of filtered (20 μm) reservoir pond water and observed for 48 hr for cercariae release. Identification of B. damnificus or Bolbophorus sp. type II cercariae was confirmed by duplex PCR. Genomic DNA was isolated from ~100 non‐shedding snails from each pond and the PCR assay used to identify the presence of B. damnificus or Bolbophorus sp. type II infected snails. The prevalence of snails shedding B. damnificus ranged from 0.23 to 13.6%. Observation of cercariae shedding underestimated true B. damnificus and Bolbophorus sp. type II prevalence in 42.9 and 64.3% of sampled ponds, respectively. Prevalence of B. damnificus infected snails was typically <3%, indicating numbers of infected snails during outbreaks are low and mitigation efforts may be successful simply by reducing snail numbers and not require complete eradication.

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North and South American Haplotypes ofDrepanocephalus auritus(Digenea: Echinostomatidae) Are Released fromBiomphalaria havanensis(Mollusca: Planorbidae) Inhabiting Catfish Aquaculture Ponds in Mississippi, U.S.A.

Cited by 10 publications

References 55 publications

Encapsulation of Bolbophorus damnificus (Digenea: Bolbophoridae) Metacercariae in Juvenile Channel Catfish, Ictalurus punctatus, Is Linked to Delayed‐onset Mortality

Encapsulation of Bolbophorus damnificus (Digenea: Bolbophoridae) Metacercariae in Juvenile Channel Catfish, Ictalurus punctatus, Is Linked to Delayed‐onset Mortality

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 & Griffin, 2017 in Mississippi, USA

Assessment of Bolbophorus damnificus prevalence and cercariae shedding in Planorbella trivolvis populations from catfish aquaculture ponds in Mississippi, USA

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