Distribution and occurrence of Ligula intestinalis (L.) plerocercoids (Cestoda, Ligulidae) in the fishes of Lake Tana, Ethiopia

Zhokhov, A. E.; Pugacheva, M. N.

doi:10.1134/s1995082912020162

Cited by 7 publications

(8 citation statements)

References 7 publications

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“…Infestation was minimal in fish sized 154-310 mm, increased to a maximum in hosts of 414-466 mm and never occurred in fish larger than 466 mm. Similar size distributions of Ligula infection have been recorded in other locations (Zhokhov and Pugacheva 2012). Only 0+ and possibly some 1+ fish will eat zooplankton (Cherghou et al 2002) and so become infected, indicating that these larger fish were infected when they were young and grew to the size at which they were found during our survey.…”

Section: Discussionsupporting

confidence: 86%

Dynamics and effects of Ligula intestinalis (L.) infection in the native fish Barbus callensis Valenciennes, 1842 in Algeria

Rouis

Dumont³

et al. 2016

Acta Parasitologica

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The dynamics of the emergence, duration, and decline phases in epizootic cycles are well known for humans and some crops, but they are poorly understood for host–parasite systems in the wild. Parasites may be particularly insidious as they are often introduced unintentionally, simultaneously with their hosts, and later transferred to species in the new location. Here we investigate the epizootic dynamics of the tapeworm

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Section: Discussionsupporting

confidence: 86%

Dynamics and effects of Ligula intestinalis (L.) infection in the native fish Barbus callensis Valenciennes, 1842 in Algeria

Rouis

Dumont³

et al. 2016

Acta Parasitologica

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“…In particular, concurrent infections of hookworm, intestinal or filarial nematodes with schistosomes that reside in the circulatory system suggest that both synergistic and antagonistic interactions can occur (Christensen et al, 1987;Curry et al, 1995;Corrêa-Oliveira et al, 2002). In fish, indirect interactions have been rarely studied in the field but available evidence would suggest that pairwise associations of larval helminths that share similar transmission routes can occur (Poulin & Valtonen, 2001), while the presence of specific species of larval cestodes in the body cavity or liver may influence the natural occurrence of intestinal helminths (Zhokhov & Pugacheva, 2012;Izvekova & Tyutin, 2014). For mammalian systems, such interactions could result from strong immunomodulatory mechanisms of one helminth species influencing the host's susceptibility to infection with others (Christensen et al, 1987;Cox, 2001).…”

Section: Introductionmentioning

confidence: 99%

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

Morley

Lewis

2017

J. Helminthol.

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Concurrent infections of helminths in vertebrates are widespread and may demonstrate synergistic, antagonistic or negligible levels of interactions between species that share a common site. However, indirect interactions between species that occur in different organs of a host are poorly documented, particularly in fish. Plerocercoids of Triaenophorus nodulosus are common liver infections of European perch (Perca fluviatilis). These larval cestodes cause extensive liver damage, resulting in systemic pathologies that include alteration of the physiochemical environment of the intestine. Perch harbour a wide range of intestinal helminths whose occurrence may be potentially influenced by the concurrent presence of T. nodulosus plerocercoids. The present study, using an existing dataset, investigated the effects of T. nodulosus on the infection levels of four common perch helminths -Acanthocephalus lucii, Camallanus lacustris, Proteocephalus percae and Bunodera luciopercae. The prevalences of A. lucii and C. lacustris were significantly reduced in fish infected by T. nodulosus, although the mean intensity of infections remained unaffected for any helminth species, while the mean abundance of C. lacustris was significantly reduced in plerocercoid-affected perch. Differences in site selection and individual interactions between the four helminth species in the intestine of T. nodulosus-infected and non-infected perch were rarely observed.

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“…Spatial and temporal variations of L. intestinalis in different cyprinid fish species are well documented (Sweeting, 1976, 1977; Bean & Winfield, 1992; Loot et al , 2001a; Dejen et al , 2006; Britton et al , 2009; Zhokhov & Pugacheva, 2012). However, to our knowledge there are few studies of this parasite from large and deep lakes (Marshall & Cowx, 2003; Msafiri et al , 2014; Rusuwa et al , 2014).…”

Section: Discussionmentioning

confidence: 99%

Spatial and temporal distribution of Ligula intestinalis (Cestoda: Diphyllobothriidea) in usipa (Engraulicypris sardella) (Pisces: Cyprinidae) in Lake Nyasa

Gabagambi

Skorping

2017

J. Helminthol.

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Engraulicypris sardella is an endemic and economically important cyprinid species in Lake Nyasa/Malawi which has recently been infected by the tapeworm Ligula intestinalis. This parasite is known to induce severe pathological and behavioural effects on other cyprinids, including castration, followed by a collapse of infected populations. As a first step to understanding the dynamics between this parasite and E. sardella, we studied the spatial and temporal variation in prevalence over a period of 1 year. Overall prevalence was about 15%, but we observed a consistently higher prevalence in the littoral compared to the pelagic zone. Fish in the upper water levels showed the highest prevalence, with a marked decline with increasing water depth down to 150 m. The proportion of infected fish varied over time, with a significantly higher prevalence in the rainy season. In a huge lake like the Nyasa, with a surface area of 29,000 km2 and a maximum depth of 785 m, the transmission success of the parasite appears to show large variations in time and space. We suggest that these conditions could lead the parasite to become persistent within the lake, rather than the typical epidemic situation as observed in smaller bodies of water.

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Distribution and occurrence of Ligula intestinalis (L.) plerocercoids (Cestoda, Ligulidae) in the fishes of Lake Tana, Ethiopia

Cited by 7 publications

References 7 publications

Dynamics and effects of Ligula intestinalis (L.) infection in the native fish Barbus callensis Valenciennes, 1842 in Algeria

Dynamics and effects of Ligula intestinalis (L.) infection in the native fish Barbus callensis Valenciennes, 1842 in Algeria

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

Spatial and temporal distribution of Ligula intestinalis (Cestoda: Diphyllobothriidea) in usipa (Engraulicypris sardella) (Pisces: Cyprinidae) in Lake Nyasa

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