Temporal changes in growth, condition and trophic niche in juvenile Cyprinus carpio infected with a non-native parasite

Parasitology ◽  
2015 ◽  
Vol 142 (13) ◽  
pp. 1579-1587 ◽  
Author(s):  
J. PEGG ◽  
D. ANDREOU ◽  
C. F. WILLIAMS ◽  
J. R. BRITTON
Keyword(s):  
Growth Condition ◽  
Cyprinus Carpio ◽  
Parasite Prevalence ◽  
Infected Fish ◽  
Trophic Niche ◽  
Winter Period ◽  
Bothriocephalus Acheilognathi ◽  
Native Parasite ◽  
Host Parasite ◽  
Over Time

SUMMARYIn host–parasite relationships, parasite prevalence and abundance can vary over time, potentially impacting how hosts are affected by infection. Here, the pathology, growth, condition and diet of a juvenile Cyprinus carpio cohort infected with the non-native cestode Bothriocephalus acheilognathi was measured in October 2012 (end of their first summer of life), April 2013 (end of first winter) and October 2013 (end of second summer). Pathology revealed consistent impacts, including severe compression and architectural modification of the intestine. At the end of the first summer, there was no difference in lengths and condition of the infected and uninfected fish. However, at the end of the winter period, the condition of infected fish was significantly reduced and by the end of their second summer, the infected fish were significantly smaller and remained in significantly reduced condition. Their diets were significantly different over time; infected fish consumed significantly higher proportions of food items <53 µm than uninfected individuals, a likely consequence of impaired functional traits due to infection. Thus, the sub-lethal impacts of this parasite, namely changes in histopathology, growth and trophic niche were dependent on time and/or age of the fish.

Antibody response of carp, Cyprinus carpio to the cestode, Bothriocephalus acheilognathi

Parasitology ◽  
1999 ◽  
Vol 118 (6) ◽  
pp. 635-639 ◽  
Author(s):  
P. NIE ◽  
D. HOOLE
Keyword(s):  
Antibody Response ◽  
Cyprinus Carpio ◽  
Serum Antibody ◽  
Infected Fish ◽  
Immune Protection ◽  
Carp Cyprinus Carpio ◽  
Bothriocephalus Acheilognathi ◽  
Protection Against Infection ◽  
Antibody Levels ◽  
Antibody Secreting Cells

The humoral antibody response and the number of pronephric antibody-secreting cells were examined in naturally Bothriocephalus acheilognathi-infected carp. Cyprinus carpio, and in those injected intraperitoneally with an extract of the cestode. In the extract-injected fish, specific antibody was detected 3 weeks after a second injection given 2 weeks after the primary injection, and antibody levels persisted for more than 200 days. A third injection also enhanced the antibody level in the extract-injected carp. The numbers of antibody-secreting cells were significantly higher in carp injected 3 times with the extract than in the control. In naturally-infected fish, the serum antibody levels and the number of pronephric antibody-secreting cells were higher in infected fish than in uninfected individuals although this difference was not statistically significant. The relevance of these results to immune protection against infection is discussed.

Effects of Bothriocephalus acheilognathi on the polarization response of pronephric leucocytes of carp, Cyprinus carpio

2000 ◽  
Vol 74 (3) ◽  
pp. 253-257 ◽  
Author(s):  
P. Nie ◽  
D. Hoole
Keyword(s):  
Cyprinus Carpio ◽  
Infected Fish ◽  
Polarization Response ◽  
Leucocyte Migration ◽  
Significant Difference ◽  
Carp Cyprinus Carpio ◽  
Bothriocephalus Acheilognathi ◽  
Carp Serum

AbstractAn in vitro assay was used to examine the effect of Bothriocephalus acheilognathi Yamaguti, 1934 (Cestoda: Pseudophyllidea) on the polarization response of pronephric leucocytes of carp, Cyprinus carpio. Leucocytes, isolated from naive, naturally-infected fish and carp injected intraperitoneally with cestode extracts, were exposed to parasite extracts (protein concentrations 0–10.0 μg ml-1), for up to 24 h in the presence or absence of carp serum. In general, polarization responses of the pronephric leucocytes, primarily neutrophils and eosinophils, increased with incubation time although there was no significant difference in the response induced by the different protein concentrations. Differences in the polarization response were, however, observed in naive, naturally infected and injected fish and the cells responded differently in the presence and absence of carp serum. In the absence of carp serum the polarization response of pronephric leucocytes in vitro was significantly reduced with cells obtained from injected and naturally infected fish compared with those obtained from naive carp. This suppression of leucocyte migration was however reduced by the addition of carp serum to the in vitro system. The role of this interaction between the possible suppression of polarization induced by the parasite and stimulation by serum is discussed.

Human-induced eutrophication maintains high parasite prevalence in breeding threespine stickleback populations

Parasitology ◽  
2014 ◽  
Vol 142 (5) ◽  
pp. 719-727 ◽  
Author(s):  
ALEXANDRE BUDRIA ◽  
ULRIKA CANDOLIN
Keyword(s):  
Species Interactions ◽  
Gasterosteus Aculeatus ◽  
Anthropogenic Activities ◽  
Parasite Prevalence ◽  
Predation Rate ◽  
Infected Fish ◽  
Threespine Stickleback ◽  
Schistocephalus Solidus ◽  
Host Parasite ◽  
High Parasite

SUMMARYAnthropogenic activities are having profound impacts on species interactions, with further consequences for populations and communities. We investigated the influence that anthropogenic eutrophication has on the prevalence of the parasitic tapeworm Schistocephalus solidus in threespine stickleback Gasterosteus aculeatus populations. We caught stickleback from four areas along the coast of Finland, and within each area from one undisturbed and one eutrophied habitat. We found the prevalence of the parasite to be lower in the eutrophied habitats at the start of the breeding season, probably because of fewer piscivorous birds that transmit the parasite. However, while the prevalence of the parasite declined across the season in the undisturbed habitat, it did less so in eutrophied habitats. We discuss different processes that could be behind the differences, such as lower predation rate on infected fish, higher food availability and less dispersal in eutrophied habitats. We found no effect of eutrophication on the proportion of infected stickleback that entered reproductive condition. Together with earlier findings, this suggests that eutrophication increases the proportion of infected stickleback that reproduce. This could promote the evolution of less parasite resistant populations, with potential consequences for the viability of the interacting parties of the host–parasite system.

Community-Level Interactions and Disease Dynamics

2021 ◽  
pp. 145-170
Author(s):  
Karen D. McCoy
Keyword(s):  
Local Area ◽  
Community Level ◽  
Disease Dynamics ◽  
Biological Communities ◽  
Natural Systems ◽  
Parasite Communities ◽  
Almost All ◽  
Host Parasite ◽  
Natural Communities ◽  
Over Time

An ecological community includes all individuals of all species that interact within a single patch or local area of habitat. Understanding the outcome of host–parasite interactions and predicting disease dynamics is particularly challenging at this biological scale because the different component species interact both directly and indirectly in complex ways. Current shifts in biodiversity due to global change, and its associated modifications to biological communities, will alter these interactions, including the probability of disease emergence, its dynamics over time, and its community-level consequences. Birds are integral component species of almost all natural communities. Due to their ubiquity and specific life history traits, they are defining actors in the ecology, evolution, and epidemiology of parasitic species. To better understand this role, this chapter examines the relative importance of birds and parasites in natural communities, revisiting basic notions in community ecology. The impact of changes in diversity for disease dynamics, including the debate surrounding dilution and amplification effects are specifically addressed. By considering the intrinsic complexities of natural communities, the importance of combining data from host and parasite communities to better understand how natural systems function over time and space is highlighted. The different elements in each section of the chapter are illustrated with brief, concrete examples from avian species, with a detailed example from marine bird communities in which Lyme disease bacteria circulate.

scholarly journals Efficacy Testing of Orally Administered Praziquantel to Common Carp Naturally Infected by Caryophyllidean Tapeworms (Platyhelminthes: Eucestoda)

2010 ◽  
Vol 79 (9) ◽  
pp. S73-S78 ◽  
Author(s):  
Eliška Sudová ◽  
Veronika Piačková ◽  
Josef Velíšek ◽  
Martin Pijáček ◽  
Zdeňka Svobodová
Keyword(s):  
Body Weight ◽  
Oral Administration ◽  
Common Carp ◽  
Cyprinus Carpio ◽  
Treatment Efficacy ◽  
Infected Fish ◽  
Individual Species ◽  
Clean Water ◽  
Single Oral Administration ◽  
Heat Treated

The aim of the study was to assess the effects of orally applied praziquantel on the treatment efficacy against most abundant tapeworms (Atractolytocestus huronensis Anthony, 1958 and Khawia sinensis Hsü, 1935) of common carp (Cyprinus carpio Linnaeus). Naturally infected fish (1.5-year-old; K1-2) were divided into 6 groups. Three trial groups were administered praziquantel mixed in heat-treated amyloid vehicle (at doses of 50 mg kg-1 body weight). In 3 groups of control, the fish were administered amyloid vehicle only. Fish were examined using gut dissection 2, 4 and 6 days after the administration. The location, intensity and prevalence of individual species of tapeworms were recorded. A. huronensis and K. sinensis were found in the gut of carp together. A. huronensis was situated in the oesophageal part of foregut, and K. sinensis came after – immediately before the first intestine loop, of the intestines of carp. The invasion of A. huronensis was fully eliminated in all trial groups after 4 days whereas some specimens of K. sinensis still persisted in the gut of few fish. The full elimination of both parasites was observed 6 days after administration. Our results showed that elimination of K. sinensis takes longer than elimination of A. huronensis. The dose of 50 mg kg-1 of orally administered praziquantel is effectual to control A. huronensis and K. sinensis infections in common carp successfully, however, a significant decrease of the number of parasites was also caused by a single oral administration of big bolus vehicle and leaving unfed fish in the clean water.

Consistent patterns of trophic niche specialization in host populations infected with a non-native copepod parasite

Parasitology ◽  
2017 ◽  
Vol 144 (7) ◽  
pp. 945-953 ◽  
Author(s):  
J. PEGG ◽  
D. ANDREOU ◽  
C. F. WILLIAMS ◽  
J. R. BRITTON
Keyword(s):  
Trophic Niche ◽  
Isotopic Niche ◽  
Trophic Specialization ◽  
Generalist Species ◽  
Copepod Parasite ◽  
Niche Specialization ◽  
Parasite Infections ◽  
Native Parasite ◽  
Fish Hosts

SUMMARYPopulations of generalist species often comprise of smaller sub-sets of relatively specialized individuals whose niches comprise small sub-sets of the overall population niche. Here, the role of parasite infections in trophic niche specialization was tested using five wild fish populations infected with the non-native parasite Ergasilus briani, a copepod parasite with a direct lifecycle that infects the gill tissues of fish hosts. Infected and uninfected fishes were sampled from the same habitats during sampling events. Prevalence in the host populations ranged between 16 and 67%, with parasite abundances of up to 66 parasites per fish. Although pathological impacts included hyperplasia and localized haemorrhaging of gill tissues, there were no significant differences in the length, weight and condition of infected and uninfected fishes. Stable isotope analyses (δ13C, δ15N) revealed that the trophic niche of infected fishes, measured as standard ellipse area (i.e. the isotopic niche), was consistently and significantly smaller compared with uninfected conspecifics. These niches of infected fishes always sat within that of uninfected fish, suggesting trophic specialization in hosts. These results suggested trophic specialization is a potentially important non-lethal consequence of parasite infection that results from impaired functional traits of the host.

scholarly journals Temperature effects on parasite prevalence in a natural hybrid complex

2010 ◽  
Vol 7 (1) ◽  
pp. 108-111 ◽  
Author(s):  
Corine N. Schoebel ◽  
Christoph Tellenbach ◽  
Piet Spaak ◽  
Justyna Wolinska
Keyword(s):  
Protozoan Parasite ◽  
Parasite Prevalence ◽  
Host Susceptibility ◽  
Host Genotype ◽  
Genotype By Environment ◽  
Hybrid Complex ◽  
Influence Of Temperature On ◽  
Temperature Interaction ◽  
Host Parasite ◽  
Genetic Specificity

Both host susceptibility and parasite infectivity commonly have a genetic basis, and can therefore be shaped by coevolution. However, these traits are often sensitive to environmental variation, resulting in genotype-by-environment interactions. We tested the influence of temperature on host–parasite genetic specificity in the Daphnia longispina hybrid complex, exposed to the protozoan parasite Caullerya mesnili . Infection rates were higher at low temperature. Furthermore, significant differences between host clones, but not between host taxa, and a host genotype-by-temperature interaction were observed.

Experimental infection of the endangered bonytail chub (Gila elegans) with the Asian fish tapeworm (Bothriocephalus acheilognathi): impacts on survival, growth, and condition

2006 ◽  
Vol 84 (10) ◽  
pp. 1383-1394 ◽  
Author(s):  
S.P. Hansen ◽  
A. Choudhury ◽  
D.M. Heisey ◽  
J.A. Ahumada ◽  
T.L. Hoffnagle ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Grand Canyon ◽  
River System ◽  
Health Condition ◽  
Infected Fish ◽  
Control Fish ◽  
Potential Threat ◽  
Humpback Chub ◽  
Bothriocephalus Acheilognathi ◽  
Negative Impacts

Bothriocephalus acheilognathi Yamaguti, 1934, a tapeworm known to be pathogenic to some fish species, has become established in the endangered humpback chub ( Gila cypha Miller, 1964) in Grand Canyon, USA, following the tapeworm’s introduction into the Colorado River system. The potential impact of this tapeworm on humpback chub was studied by exposing the closely related bonytail chub ( Gila elegans Baird and Girard, 1853) to the parasite under a range of conditions that included potential stressors of humpback chub in their natal waters, such as abrupt temperature change and a limited food base. Survival of infected fish under low food rations was considerably lower than that of control fish, and mortality of infected fish began 20 days earlier. Growth of infected fish was significantly reduced, and negative changes in health condition indices were found. No significant negative impacts were revealed from the synergistic effects between temperature shock and infection. Bothriocephalus acheilognathi does present a potential threat to humpback chub in Grand Canyon and should be considered, along with conventional concerns involving altered flow regimes and predation, when management decisions are made concerning conservation of this endangered species.

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