Acanthocephalans parasites of two Characiformes fishes as bioindicators of cadmium contamination in two neotropical rivers in Brazil

Duarte, Gisele Silva Costa; Lehun, Atsler Luana; Leite, Lucas Aparecido Rosa; Filho, Nelson Consolin; Bellay, Sybelle; Takemoto, Ricardo Massato

doi:10.1016/j.scitotenv.2020.140339

Cited by 25 publications

(16 citation statements)

References 56 publications

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“…This dominance also can be explained by the feeding habits of the host, which includes a wide variety of invertebrates, presenting low food specificity, making it extremely susceptible to parasite acquisition through the trophic web (Fugi et al, 2001;Lizama et al, 2005). Other studies have already demonstrated the high prevalence of N. curemai in P. lineatus (Martins et al, 2001;Leite et al, 2018;Duarte et al, 2020;Lehun et al, 2020), which contributes to the high abundance in the present study, especially for Period 2.…”

Section: Discussionsupporting

confidence: 69%

Temporal effects and changes in the parasitic community ofProchilodus lineatus(Valenciennes, 1837) (Characiformes: Prochilodontidae) in a floodplain

et al. 2022

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The construction of dams causes several impacts on aquatic environments, altering the flow of rivers, environmental variables, and all biota present, including parasites. Little is known about how the parasitic community can be influenced in the long term by environmental changes. In this study, it was expected that the impacts caused by environmental disturbances will be directly reflected by the composition of the parasite populations. We evaluated the change in the structure of the Prochilodus lineatus endoparasite community between two periods sampled 15 years apart in the upper Paraná River floodplain. There was a significant difference in the weight–length relationship of P. lineatus between these periods and a total of 15 species of parasites were found: 11 species in Period 1 and nine species in Period 2 and five species occurred in both periods. The species richness and diversity were higher in Period 1, and we observed that the correlation of descriptors (richness, diversity and evenness) increased with fish length in this period. In both periods, digeneans numerically dominated the parasitic community, and we verified changes in the composition of parasites between periods. Both the host and the parasites were possibly affected by the environmental impacts resulting from the construction of dams over time, and it is noteworthy that complex life cycle parasites such as Digenea and Acanthocephala require intermediate hosts to complete their life cycle, and the population responds to fluctuations in the face of modified environments.

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Section: Discussionsupporting

confidence: 69%

Temporal effects and changes in the parasitic community ofProchilodus lineatus(Valenciennes, 1837) (Characiformes: Prochilodontidae) in a floodplain

et al. 2022

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“…In contrast, several studies [13,23,24,31] have pointed to a beneficial impact of acanthocephalans on their fish hosts because these worms have much higher potential and capacity than their fish hosts to bioaccumulate different metals, especially the toxic ones, and thus can minimize the amounts of heavy metals in the tissues of these fish hosts. However, numerous studies [13,[26][27][28][29]32,34] revealed that metal concentrations in the tissues of acanthocephalan-infected fish were significantly less than those of uninfected conspecifics. In aquatic environments, heavy metals are generally bound to suspended particles or adsorbed on particulate organic matter, and only minute portions of them are present in water as free ions (hydrated) and identified as "biologically available metals", i.e., can be taken up directly from water by living organisms.…”

Section: Discussionmentioning

confidence: 99%

“…Over the years 1995-2020, a large number of valuable studies have demonstrated that fish helminth parasites, especially those that do not have a digestive tract (i.e., acanthocephalans and cestodes), actively use their tegument to absorb nutrients from the fish'sintestine. Thus, these helminthsare good sentinels for trace metal pollution in aquatic environments since they have much higher potential and capacity than their fish hosts to bioaccumulate different metals, especially toxic ones, from the fish's intestine [13,[23][24][25][26][27][28][29]. This process may affect the physiology of the fish hosts by lowering the amount of metals available in their intestine before absorption through the intestinal wall to other organs.…”

Section: Introductionmentioning

confidence: 99%

Acanthocephalan Worms Mitigate the Harmful Impacts of Heavy Metal Pollution on Their Fish Hosts

Hassanine

Al-Hasawi

2021

Fishes

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Toxic metal pollutants in aquatic environments and infestationwith intestinal helminths adversely affect the fish health, as well as fish consumers. Acanthocephalan worms in fish intestine have a high potential to absorb and bioaccumulate different heavy metals, especially toxic ones, from the intestine via their tegument with greater efficiency than the fish intestinal wall. Herein, 47 specimens of the fish Siganusrivulatus were trapped in the Red Sea, Egypt, from a chronically polluted bay. All were intoxicatedwith Cd and Pb; 20 (42.5%) were uninfected with any intestinal worm, but the other 27 (57.5%) were infected only by the intestinal acanthocephalan Sclerocollum rubrimaris. The number of individual worms in a fish host (infrapopulation size) ranged from 32 to 236. As a reference group, 22 uncontaminated–uninfected specimens of S. rivulatus were trapped from a small unpolluted bay. Our results revealed that infection with acanthocephalans alleviatesthe harmful effectsof toxic metalson their fish hosts by: (1) lowering the elevated concentrations of both Cd and Pb in fish liver; (2) lowering the elevated levels of liver enzymes (ALT, AST, ALP, and GGT), glucose, triglycerides, and urea in fish blood serum; and (3) raising the declined levels of total protein and albumin in fish blood serum. All of these were dependent on S. rubrimaris infrapopulation size in fish intestine.

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“…The data used in this paper were compiled from the papers by Pavanelli et al (1997), Takemoto et al (2009, and Lehun et al (2020). These papers are points on an accumulation curve of records of parasite species in their hosts in the upper Paraná river floodplain, which can be surveyed using the SCOPUS database, where we used as query expression: ["Upper Paraná River Floodplain" OR "Paraná River" OR "Monogenea" OR "Digenea" OR "Cestoda" OR "Myxozoa "* AND NOT "Anuran"* AND NOT "snail"].…”

Section: Discussionmentioning

confidence: 99%

“…To generate the data in Table 1, the articles describing new species of parasites, described for floodplain in the last 37 years and their respective hosts, native and non-native (Ota et al, 2018), were compiled. In the Figure 3 the data of parasite species richness and hosts according to Pavanelli et al (1997), Takemoto et al (2009 and Lehun et al (2020), accumulated richness over time, were used. In the Figure 4, Figure 7B and Figure 8 the parasite and host species richness data according to Lehun et al (2020) were used.…”

Section: Discussionmentioning

confidence: 99%

Investigating the diversity of fish parasites in the floodplain of the upper Paraná River: a long-term ecological monitoring

et al. 2021

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Aim The aim of this study was to present the description of new species of fish parasites in native and non-native hosts and the parasite interaction / host, available in studies for 37 years in the upper Paraná River floodplain. Methods The sampling described in this study is part of a scientometric methodology, in which specific query expressions were used, together with the database available in the Nupelia Sector Library, through Theses and Dissertations. Results A total of 44 species of parasites belonging to different groups were described for 27 species of fish of different orders. In these 37 years of studies, an increase 68% was observed in the number of parasite species, presenting a richness of 201 species in the floodplain, being: Monogenea, Digenea, Nematoda and Cestoda are the groups that present the largest records of species. More than 80 hosts have their parasite fauna registered and most studies are carried out with species of native hosts in the floodplain, being Prochilodus lineatus the host with the highest number of records. Conclusions Parasitological studies are an important scientific tool for understanding the dynamics of ecological interactions in the natural environment, and knowledge of this diversity of organisms is continuous and necessary, and the results of the monitoring carried out in the floodplain during the last 37 years only reinforce this with a constant increase in the description of new species and new records of parasite-host interactions. In times of constant environmental loss and habitat fragmentation, it is of utmost importance to care for and preserve floodplains to maintain biodiversity.

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Acanthocephalans parasites of two Characiformes fishes as bioindicators of cadmium contamination in two neotropical rivers in Brazil

Cited by 25 publications

References 56 publications

Temporal effects and changes in the parasitic community ofProchilodus lineatus(Valenciennes, 1837) (Characiformes: Prochilodontidae) in a floodplain

Temporal effects and changes in the parasitic community ofProchilodus lineatus(Valenciennes, 1837) (Characiformes: Prochilodontidae) in a floodplain

Acanthocephalan Worms Mitigate the Harmful Impacts of Heavy Metal Pollution on Their Fish Hosts

Investigating the diversity of fish parasites in the floodplain of the upper Paraná River: a long-term ecological monitoring

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