A snapshot of parasites in tropical and subtropical freshwater wetlands: modest attention for major players

Vanhove, Maarten Pieterjan; Kmentová, Nikol; Luus‐Powell, Wilmien J.; Netherlands, Edward C.; Buron, Isaure de; Barger, Michael A.

doi:10.1016/b978-0-12-822362-8.00020-7

Cited by 4 publications

(5 citation statements)

References 236 publications

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“…Absence of parasites should also be more systematically published: reports are rare in the literature, and published accounts often do not explicitly state whether hosts were inspected for a parasite taxon that was not reported, probably because of publication bias against negative results 302,345 . Climate change may help sustain or expand invasive tilapia populations, 354 although its expected impact on directly transmitted aquatic parasites is unclear 355 . A better understanding of any aspect of the physiology and infection dynamics of tilapia monogeneans would aid understanding how global change will influence the poorly understood mechanisms behind monogenean pathology, distribution, host range and host‐switching.…”

Section: Parasitic Infections Of Tilapiamentioning

confidence: 99%

“…302,345 Climate change may help sustain or expand invasive tilapia populations, 354 although its expected impact on directly transmitted aquatic parasites is unclear. 355 A better understanding of any aspect of the physiology and infection dynamics of tilapia monogeneans would aid understanding how global change will influence the poorly understood mechanisms behind monogenean pathology, distribution, host range and host-switching.…”

Section: Researchmentioning

confidence: 99%

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A global review of problematic and pathogenic parasites of farmed tilapia

Shinn

Avenant‐Oldewage

Bondad‐Reantaso

et al. 2023

Reviews in Aquaculture

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Over the past 80 years, tilapia have been translocated globally for aquaculture; active production is recorded in >124 countries. Of 7 million tonnes of tilapia produced in aquaculture, 79% is from 79 countries outside the natural range of tilapia. Capture fisheries account for a further 723,627 tonnes of tilapia, and >47% of this is landed from established invasive populations outside Africa. Tilapias host a rich fauna of parasites, many of which have been translocated with their hosts. This review summarises >2500 host–parasite records from 73+ countries and >820 recorded tilapia translocations (provided in the supplementary materials). This work focuses on the notable pathogens that threaten the health of cultured populations of tilapia, providing a description of their pathology and includes species that also have substantial impacts on wild tilapia populations, where relevant. For each major parasite taxonomic group, we highlight which parasites have been translocated or have been acquired from the new environments into which tilapia have been introduced, together with remarks on standard treatment approaches and research on them and their management and control. Regarding the theme ‘Tilapia health: quo vadis?’, Africa has enormous potential for aquaculture growth, but substantial knowledge gaps about tilapia parasites in many African states remain, which creates associated production and biosecurity risks. For each parasitic group, therefore, the risks of parasite translocation to new regions as tilapia aquaculture industries expand are highlighted.

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Section: Parasitic Infections Of Tilapiamentioning

confidence: 99%

Section: Researchmentioning

confidence: 99%

A global review of problematic and pathogenic parasites of farmed tilapia

Shinn

Avenant‐Oldewage

Bondad‐Reantaso

et al. 2023

Reviews in Aquaculture

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“…However, this trend cannot be generalized, as the direction of change (if any) can vary between parasite taxa even within the same study (Howard et al 2019, Fiorenza et al 2020b, Quinn et al 2021, Welicky et al 2021). A decline in abundance is mostly observed in ectoparasites and in parasites with more than one host than endoparasites and parasites with one host (Carlson et al 2017, Vanhove et al 2022, Wood et al 2023). It is therefore important to monitor each ecosystem, as different parasites can respond differently in different ecosystems and to different perturbations.…”

Section: Discussionmentioning

confidence: 99%

Worms of change: anthropogenic disturbance changes the ectoparasite community structure of Lake Victoria cichlids

Gobbin,

Van Steenberge,

Vranken

et al. 2024

Preprint

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Host-parasite interactions increase the complexity, and thus robustness and resilience, of an ecosystem. This role is particularly relevant in global change times. Environmental changes cause biodiversity loss and shifts in community compositions of free-living organisms, but how these changes affect parasite communities is still unclear. We tested how parasites respond to anthropogenic perturbations, using the Lake Victoria case (East Africa), after 40 years of their onset. Lake Victoria experienced multiple human-induced invasions (e.g. Nile perch), eutrophication, which heavily affected haplochromine cichlid fishes (whose species richness decreased from 500 to 250 species in a decade). We compared gill macroparasite communities of 13 haplochromine species before and after perturbations, using historical and recent fish collections. The host-parasite network re-arranged in a way that buffers the impact of perturbations, indicating resilience. However, the host range of parasites, which is linked to resilience ability, decreased and thus we expect a decreased resilience ability in the future. We also found a decrease in infection parameters, co-infection occurrence, and biodiversity indices highlighting the urgent need of a conservation plan for wildlife parasites, to preserve their ecosystem services in face of global change. This study serves as a proof-of-concept of how often overlooked aspects of host-parasite interactions provide a tool to monitor the health status of an ecosystem.

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“…It is believed that these forms are not separate from their associated species, as some species of Trypanosoma are known to have multiple morphotypes associated with different stages of their life cycles. Interestingly, most of the polymorphism is seen within the leech and dipteran vectors of anuran trypanosomes (Netherlands, 2019 ; Vanhove et al ., 2022 ); however, there are several reports of rounded trypanosome forms. Shannon ( 2016 ) found round forms of T. chattoni in the peripheral blood of North American species of Lithobates .…”

Section: Discussionmentioning

confidence: 99%

“…The invertebrate vectors of trypanosomes include dipterans (e.g. mosquitoes, biting midges and hippoboscid louse flies), triatomine bugs and leeches (Ramos and Urdaneta-Morales, 1977 ), in which the trypomastigotes typically undergo complex development, transforming into several different stages before infecting a new host (Magez et al ., 2021 ; Vanhove et al ., 2022 ). Generally, trypanosomes alternate between infecting a vertebrate and invertebrate host during their lifecycles (Hamilton et al ., 2007 ).…”

Section: Introductionmentioning

confidence: 99%

Taxonomic re-evaluation of African anuran trypanosomes with the redescription and molecular diagnosis of Trypanosoma (Trypanosoma) nelspruitense Laveran, 1904 and Trypanosoma (Haematomonas) grandicolor Pienaar, 1962

2023

Self Cite

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The aquatic and terrestrial clades of species of Trypanosoma could provide insight into the evolutionary history of the genus, as well as complementary information for biomedical studies of medically and economically important species of Trypanosoma. The ecological interactions and phylogeny of aquatic trypanosomes are currently not well-understood, mostly due to their complex life cycles and a deficiency of data. The species of Trypanosoma from African anuran hosts are of the least understood taxa in the genus. Trypanosomes were collected from South African frogs and subjected to morphological and phylogenetic analyses. This study redescribes Trypanosoma (Trypanosoma) nelspruitense Laveran, 1904 and Trypanosoma (Haematomonas) grandicolor Pienaar, 1962, with morphological and molecular data. The present study aims to create a platform for further future research on African anuran trypanosomes.

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A snapshot of parasites in tropical and subtropical freshwater wetlands: modest attention for major players

Cited by 4 publications

References 236 publications

A global review of problematic and pathogenic parasites of farmed tilapia

A global review of problematic and pathogenic parasites of farmed tilapia

Worms of change: anthropogenic disturbance changes the ectoparasite community structure of Lake Victoria cichlids

Taxonomic re-evaluation of African anuran trypanosomes with the redescription and molecular diagnosis of Trypanosoma (Trypanosoma) nelspruitense Laveran, 1904 and Trypanosoma (Haematomonas) grandicolor Pienaar, 1962

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