Influence of<i>Triaenophorus nodulosus</i>plerocercoids (Cestoda: Pseudophyllidea) on the occurrence of intestinal helminths in the perch (<i>Perca fluviatilis</i>)

Morley, N.J.; Lewis, Jane

doi:10.1017/s0022149x16000870

Cited by 7 publications

(9 citation statements)

References 30 publications

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“…Such interactions have been documented across parasite taxa ( Lello et al., 2004 , Telfer et al., 2010 ) and are not restricted to species inhabiting the same tissues or organ. In European perch ( Perca fluviatilis ), for example, infections with a larval cestode ( Triaenophorus nodulus ) in liver have been associated with reductions in the gut-dwelling helminths Acanthocephalus lucii and Camallanus lacustris , presumably mediated via pathological or physiological processes ( Morley and Lewis, 2017 ). In another study, two larval trematodes ( R. ondatrae , Echinostoma trivolvis ) infecting Pacific chorus frog ( Pseudacris regilla ) tadpoles were found to display apparent immune-mediated competition, each one reducing the intensity of the other ( Johnson and Buller, 2011 ).…”

Section: Discussionmentioning

confidence: 99%

Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby

Gendron

Marcogliese

2017

International Journal for Parasitology: Parasites and Wildlife

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As they integrate into recipient food webs, invasive exotic species may influence the population dynamics of native parasites. Here we assess the potential impact of the Eurasian round goby (Neogobius melanostomus) on the abundance of eyeflukes of the genus Diplostomum, which are common parasites in fishes of the St. Lawrence River (Canada). Analyses of data collected over nearly two decades revealed that the infection levels in three native fish [spottail shiner (Notropis hudsonius), golden shiner (Notemigonus crysoleucas) yellow perch (Perca flavescens)] declined sharply throughout the St. Lawrence River after the introduction of the goby. At two sites where data were collected at regular time intervals, declines of Diplostomum spp. in spottail shiners occurred within two years of the goby's first recorded appearance, with prevalence dropping as much as 77–80% between pre-invasion and post-invasion periods. Furthermore, in localities where gobies remained scarce, infection in native species did not change significantly over time. Altogether, these observations suggest that gobies play a role in the eyefluke collapse. The decline in populations of the main definitive host (ring-billed gulls, Larus delawarensis) and changes in hydrology during periods of parasite recruitment were not strongly supported as alternate explanations for this phenomenon. Since other snail-transmitted trematodes with similar life cycles to Diplostomum spp. did not show the same decreasing pattern, we conclude that eyeflukes did not decline as a result of snail depletion due to goby predation. Rather, we suggest that gobies acted as decoys, diluting the infection. As Diplostomum spp. occurred at lower abundance in gobies than in native fish hosts, the replacement of native fish with exotic gobies in the diet of gulls might have played a part in reducing parasite transmission. In contrast to the typically negative impact of invasions, the goby-induced decline of this pathogen may have beneficial effects for native fishes.

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Section: Discussionmentioning

confidence: 99%

Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby

Gendron

Marcogliese

2017

International Journal for Parasitology: Parasites and Wildlife

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“…(Frolova et al, 2018). There is also information about the negative impact of T. nodulosus invasion on the body and some biochemical parameters of the liver (Morley, Lewis, 2017;Borvinskaya et al, 2019). We believed that under optimal conditions, the parasites have little effect on the physiological characteristics of hosts, but it is an important selective factor that in specific environmental conditions or under the stress, significantly affect the stability of host body.…”

Section: Influence Of Triaenophorus Nodulosus Invasion On European Perchmentioning

confidence: 99%

Influence of Triaenophorus nodulosus invasion on morphobiological parameters of European perch (Perca fluviatilis L.) in Shatsk National Nature Park reservoirs

Vovk¹,

Kononenko²,

Shvets³

2020

Ukr J Ecol

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It was conducted comprehensive ichthyological and ichthyopatological research of European perch (Perca fluviatilis L.) populations in lakes of Shatsk National Nature Park and the impact of Triaenophorus nodulosus invasion on its size, weight and reproductive ability. Morphometric analysis, absolute and relative fecundity of fish were determined by the methods generally accepted in ichthyology. Clinical examination of fish (2,225 specimens, including European perch -1650 specimens) was performed during control catches. Simultaneously, the weight, size, and age of the fish were determined. Morphometric analysis was performed on 120 specimens of perch with the length of 104.4-194.8 mm and the weight of 16.4-177.6 g. Pathoanatomic autopsy of the fish was performed in the field and laboratory conditions. Parasitological studies were performed by the method of incomplete parasitological analysis. The extent and intensity of the invasion were determined. When conducting research on the parasitofauna of native fish species in the lakes of the Shatsk National Nature Park, it was found their infestation with helminths of various systematic positions (Triaenophorus nodulosus, Khawia sinensis, Raphidascaris. acus, and Philometroides lusiana). Perch was the most infected with the helminths. The invasion caused by the plerocercoid of Cestoda T. Nodulosus was the most intensive (18.2-56.3%, depending on the reservoir). There was a significant difference in the measurements of non-infested and infested with T. nodulosus fish individuals of the same age, we also registered significant lag in growth and a decrease in body weight among the infested specimens. A steady trend towards a decrease in fecundity parameters was also observed in infested fish. Thus, in non-infested individuals of 4-year perch, the highest individual absolute fecundity (IAF) was 6.7 thousand eggs against 3.1 thousand eggs in the infested perch (Lucimer lake). The lowest IAF – 3.9 thousand eggs against 2.0 thousand eggs in the infested perch specimesn was found in Chorne Velyke lake. In non-infested individuals of 5-year perch, the highest IAF index was 9.4 thousand eggs when compared to 6.8 thousand in the infested perch (Pulemetske lake). The lowest IAF was 6.3 thousand eggs (Chorne Velyke lake). The highest IAF was recorded in perch from Pulemetske lake (34.6 thousand eggs in non-infested versus 10.3 thousand eggs in infested specimens). The lowest IAF was observed in perch from Chorne Velyke lake (9.1 and 6.6 thousand eggs, respectively). There was decrease in fish size, weight and fecundity in perch infested with Tr. nodulosus, but it did not affect the reproductive fish ability.

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“…Studies on indirect interactions between concurrent helminth infections in fish are rare, especially under field conditions. Nevertheless, available evidence would suggest that larval cestodes demonstrate the greatest potential to influence indirectly the occurrence of other helminth species in concurrent infections (Markov & Kosareva, 1962; Zhokhov & Pugacheva, 2012; Morley & Lewis, 2017). The occurrence of intestinal helminths in fish has been shown to be indirectly affected by co-infection with plerocercoids of the cestode Triaenophorus nodulosus that reside in the liver of perch ( Perca fluviatilis ).…”

Section: Introductionmentioning

confidence: 99%

“…The occurrence of intestinal helminths in fish has been shown to be indirectly affected by co-infection with plerocercoids of the cestode Triaenophorus nodulosus that reside in the liver of perch ( Perca fluviatilis ). These plerocercoids appear to induce a variable effect on such parasites, resulting in a significant reduction in the prevalence of acanthocephalans and nematodes, but inducing no effect on the occurrence of cestodes and trematodes, in the digestive tract (Morley & Lewis, 2017). Furthermore, the distribution of the trematode Bunodera lucioperca along the length of the intestine may also be altered in T. nodulosus- infected perch (Izvekova & Tyutin, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the distribution of the trematode Bunodera lucioperca along the length of the intestine may also be altered in T. nodulosus- infected perch (Izvekova & Tyutin, 2014). Such effects on intestinal helminths may be due to either cestode-induced damage to the liver, the release of parasite excretory/secretory (E/S) products, or the host's immune response (Morley & Lewis, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Influence ofLigula intestinalisplerocercoids (Cestoda: Diphyllobothriidea) on the occurrence of eyeflukes in roach (Rutilus rutilus) from a lake in south-east England

Morley

Lewis

2018

J. Helminthol.

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Vertebrate hosts commonly harbour concurrent infections of different helminth species which may interact with each other in a synergistic, antagonistic or negligible manner. Direct interactions between helminths that share a common site in the host have been regularly reported, but indirect interactions between species that occur in different sites are rarely described, especially in fish hosts. Plerocercoids of Ligula intestinalis are common infections of the peritoneal (body) cavity of roach (Rutilus rutilus) in freshwater habitats. These larval cestodes can cause extensive systemic pathologies to the fish host, which in turn may alter its susceptibility as a target host for other helminth species. The present study, using an existing dataset, investigates the influence of L. intestinalis (ligulosis) on frequently occurring eyefluke infections in roach sampled from a lake in south-east England. The occurrence of two species of eyefluke (Diplostomum sp. and Tylodelphys sp.) in the roach population demonstrated no significant levels of interaction with each other. The prevalence but not mean intensity or abundance of Diplostomum sp. was significantly increased in ligulosed roach, while the incidence of Tylodelphys sp. remained unchanged. Analyses of bilateral asymmetry in the occurrence of eyeflukes in left and right eyes of infected fish demonstrate that Tylodelphys sp. shows significant asymmetry in non-ligulosed roach, which is not replicated in ligulosed individuals. In contrast, Diplostomum sp. shows no evidence of asymmetry in either ligulosed or non-ligulosed fish.

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Influence ofTriaenophorus nodulosusplerocercoids (Cestoda: Pseudophyllidea) on the occurrence of intestinal helminths in the perch (Perca fluviatilis)

Cited by 7 publications

References 30 publications

Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby

Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby

Influence of Triaenophorus nodulosus invasion on morphobiological parameters of European perch (Perca fluviatilis L.) in Shatsk National Nature Park reservoirs

Influence ofLigula intestinalisplerocercoids (Cestoda: Diphyllobothriidea) on the occurrence of eyeflukes in roach (Rutilus rutilus) from a lake in south-east England

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