First report of Urosporidium sp., a haplosporidian hyperparasite infecting digenean trematode Parvatrema duboisi in Manila clam, Ruditapes philippinarum on the west coast of Korea

Le, Thanh Cuong; Kang, Hyun-Sil; Hong, Hye Kyoung; Park, Kwang-jae; Choi, Kwang-Sik

doi:10.1016/j.jip.2015.08.004

Cited by 11 publications

(3 citation statements)

References 36 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, several trematode families in varying life stages seem to co-exist in the clam individual and population. Although not recorded in this study, the Manila clam not only harbors sporocysts but also metacercarial P. duboisi in the mantle (Le et al, 2015;Cho et al, 2020) and Echinostomatidae metacercariae in the foot (Kim et al, 2004). Furthermore, the prevalence of co-infection among these trematodes is much higher than the prevalence of coinfection among the competing larval trematodes in the sporocyst stage (unpublished data).…”

Section: Larval Trematodes Infection In Manila Clammentioning

confidence: 63%

Effects of larval trematode parasitism on the reproductive capacity of Manila clam Ruditapes philippinarum in a sandy-mud tidal flat on the west coast of Korea

et al. 2022

Self Cite

View full text Add to dashboard Cite

Gonad intrusion of the larval trematodes often results in substantial damage to the reproductive capacity of some economically important marine bivalves. Such detrimental impacts of the larval trematode infection are observed in Manila clam Ruditapes philippinarum in the coastal Yellow Sea, although the effects on the host’s reproduction are poorly understood. Accordingly, this study attempts to understand the impacts of parasitism on clam reproduction using histology. Of the 1,255 adult clams collected in early June from a tidal flat on the west coast of Korea, 68 individuals (5.4%) were infected by three different larval trematodes, including Cercaria tapidis, Cercaria pectinata, and Parvatrema duboisi. Histology revealed that the uninfected clams were in the late developing or ripe stage, exhibiting fully developed gametes in the expended follicles. In contrast, clams infected by the larval trematode showed retarded gonad maturation. Some of those clams remained sexually indifferent (13/68 infected clams) or early developing (9/68 infected clams). We categorized the infection level into uninfected (0), light (1), moderate (2), heavy (3), and very heavy (4), according to the area of sporocysts occupying the histology section. The image analysis indicated that approximately 50% of the infected clams were in “heavy” and “very heavy” conditions, and they occupied 16.7% and 26.9% of the total cross-section area, respectively. The nonparametric Kruskal–Wallis’s test and the post-hoc Tukey’s test indicated that the condition index (CI) of clams in heavy and very heavy infection were significantly lower than uninfected clams. In conclusion, the larval trematodes infected about 5.4% of the clam population in the tidal flat on the west coast of Korea, and we estimated that 32.4% of the infected clams might fail to reproduce during a spawning period due to the severe infection.

show abstract

Section: Larval Trematodes Infection In Manila Clammentioning

confidence: 63%

Effects of larval trematode parasitism on the reproductive capacity of Manila clam Ruditapes philippinarum in a sandy-mud tidal flat on the west coast of Korea

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, the trematode is in turn hyperparasitised by a protistan Urosporidium sp. and the Urosporidium burden on its trematode host causes mortality, thus decreasing the trematode load on the clam host (Le et al, 2015). While hyperparasitism in this instance is not causing deleterious effects to the clam itself, it can be the case that hyperparasitism can lead to decreased market value of commercial species (Le et al, 2015) and as such parasitological studies may be enhanced by elucidating all forms of parasitism within a host.…”

Section: Mytilicola Intestinalismentioning

confidence: 99%

The Importance of Marine Bivalves in Invasive Host–Parasite Introductions

et al. 2021

View full text Add to dashboard Cite

Although research into the ecology and impacts of invasive species is prevalent, there are knowledge gaps relating to the role of invasive species in parasite transmission. This work synthesises invasive host–parasite interactions and impacts, using marine bivalves as a model group, to consider how global movement of shellfish consignments for aquaculture purposes facilitates the unintentional transfer of invasives. We discuss how invasive species can act as both hosts or parasitic organisms themselves, and introductions may lead to diseases within the bivalve aquaculture sector. This review highlights the importance of interdisciplinary research, with particular regard to the fields of parasitology and invasion ecology. We suggest that further integrating these fields will enhance critical knowledge of marine diseases, parasite-invasive-bivalve interplay dynamics, and potential mitigation strategies, including temperature-based disease surveillance models. We also address how climate change might impact invasive species, again with a focus on marine bivalves, and the potential outcomes for parasite transmission, including changes in host/parasite distribution, life-history and virulence. We acknowledge the importance of horizon scanning for future invasive host–parasite introductions and note that increased screening of invasive species, both in their native and invaded ranges, will provide clarity on invasion dynamics and potential impacts.

show abstract

“…understand the influence of factors associated with mortality in manila clam stocks (Park and Choi 2001;Paillard et al 2004;Dang et al 2009Dang et al , 2013, to study hyperparasites (Le et al 2015), and to report micro plastics ingestions (Davidson and Dudas 2016).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Optimizing cost-efficiency of long term monitoring programs by using spatially balanced sampling designs: The case of manila clams in Arcachon bay

Kermorvant

Caill-Milly

Bru

et al. 2019

Ecological Informatics

View full text Add to dashboard Cite

Funding lake is one major issue in ecology, in particular at local scale. It is known that sustainable management of a natural population requires a good understanding of its functioning, itself dependent on a good long term monitoring program. Such programs are usually very difficult to implement, especially for resources characterized by high spatio-temporal variation in their distribution, resulting in a trade off between efficiency and costs. Today, thanks to rapidly evolving statistical theory, new survey designs are developed, some with the characteristic of well balancing samples in the study area. This paper aims at demonstrating that theses advanced sampling designs perform better than the usual ones for long term monitoring program of local resources, with the added benefices of saving money and also increasing results accuracy. To prove it, and for it high spatio-temporal variation in it distribution, we choose the example of Manila clam's stock monitoring in Arcachon bay. This stock is under high scrutiny and last campaigns could not be done because of lack of funding (at least 50,000€/survey). We use a simulation study based on real data to assess and compare performances of news and older sampling designs on this survey. Three sampling designs are tested in both of the 6 past monitoring campaigns data and we estimate the cost of their application in the field. Selected sampling designs are: 1-simple random sampling (SRS-the one used in the past years of this monitoring program), 2generalized tessellation sampling (GRTS-a recent spatially balanced sampling design known for its high performance) and, 3-balanced acceptance sampling design (BAS-a newly developed spatially balanced sampling design, never tested yet in a real population). We first confirm that the two spatially balanced sampling designs perform better than simple random sampling. Both of the advanced sampling designs perform equally and allow achieving same accuracy in the results with almost half sampling intensity than SRS. This makes them so cost-effective that 30% of each campaign price could be saved if they were used. Moreover, the three sampling designs need a constant sample size thought years to achieve a fixed accuracy in results. This will permit us to fix one sample size that could be done for all future campaigns; and this, despite the existence of spatial and temporal variations in clam's distribution. Highlights ► Long term monitoring program at local scale are mandatory for resource management but often too expensive to undertake. ► For the example of manila clams resource in Arcachon bay, each campaign price can be lowered by 30% only in using spatially balanced sampling design instead of simple random sampling. ► More than lowering the survey price, wanted accuracy in the results can be fixed a priori. ► BAS sampling design, never compared to other sampling designs in real data previously perform very well.

show abstract

First report of Urosporidium sp., a haplosporidian hyperparasite infecting digenean trematode Parvatrema duboisi in Manila clam, Ruditapes philippinarum on the west coast of Korea

Cited by 11 publications

References 36 publications

Effects of larval trematode parasitism on the reproductive capacity of Manila clam Ruditapes philippinarum in a sandy-mud tidal flat on the west coast of Korea

Effects of larval trematode parasitism on the reproductive capacity of Manila clam Ruditapes philippinarum in a sandy-mud tidal flat on the west coast of Korea

The Importance of Marine Bivalves in Invasive Host–Parasite Introductions

Optimizing cost-efficiency of long term monitoring programs by using spatially balanced sampling designs: The case of manila clams in Arcachon bay

Contact Info

Product

Resources

About