Trophic Relationship between the Parasitic Isopod<i>Ichthyoxenus japonensis</i>and the Fish<i>Carassius auratus auratus</i>As Revealed by Stable Isotopes

Xu, Jun; Zhang, Min; Xie, Ping

doi:10.1080/02705060.2007.9665055

Cited by 10 publications

(4 citation statements)

References 30 publications

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“…However, studies which compare isotopic signatures of parasites with their hosts indicate that parasites do not always fit with the commonly accepted consumer-diet discrimination patterns seen in free-living species (e.g. Neilson and Brown, 1999; Iken et al 2001; Power and Klein, 2004; O'Grady and Dearing, 2006; Xu et al 2007; Dubois et al 2009; Navarro et al 2014; Behrmann-Godel and Yohannes, 2015).…”

Section: Introductionmentioning

confidence: 99%

Trophic relationship between the invasive parasitic copepod Mytilicola orientalis and its native blue mussel (Mytilus edulis) host

et al. 2017

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Invasive parasites can spill over to new hosts in invaded ecosystems with often unpredictable trophic relationships in the newly arising parasite-host interactions. In European seas, the intestinal copepod Mytilicola orientalis was co-introduced with Pacific oysters (Magallana gigas) and spilled over to native blue mussels (Mytilus edulis), with negative impacts on the condition of infected mussels. However, whether the parasite feeds on host tissue and/or stomach contents is yet unknown. To answer this question, we performed a stable isotope analysis in which we included mussel host tissue and the primary food sources of the mussels, microphytobenthos (MPB) and particulate organic matter (POM). The copepods were slightly enriched in δ15N (mean Δ15N ± s.d.; 1·22 ± 0·58‰) and δ13C (Δ13C 0·25 ± 0·32‰) with respect to their host. Stable isotope mixing models using a range of trophic fractionation factors indicated that host tissue was the main food resource with consistent additional contributions of MPB and POM. These results suggest that the trophic relationship of the invasive copepod with its mussel host is parasitic as well as commensalistic. Stable isotope studies such as this one may be a useful tool to unravel trophic relationships in new parasite-host associations in the course of invasions.

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Section: Introductionmentioning

confidence: 99%

Trophic relationship between the invasive parasitic copepod Mytilicola orientalis and its native blue mussel (Mytilus edulis) host

et al. 2017

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“…Additionally, parasites have developed different feeding strategies which encompass active feeding on host tissues, assimilation of nutrients derived from the metabolism of the host and sharing of resources with the host [8,16]. Variable isotope fractionation may further serve as an indication of selective feeding strategies developed by parasites [17].…”

Section: Introductionmentioning

confidence: 99%

Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa

Gilbert

Nachev

Jochmann

et al. 2019

Preprint

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BackgroundStable isotope analysis offers a unique tool for comparing trophic interactions and food web architecture in ecosystems. This approach is based on analysis of the stable isotope ratios of carbon (13 C/ 12 C) and nitrogen (15 N/ 14 N) in organisms. Studies comparing stable isotope enrichment in hosts and parasites have shown that parasites are variably enriched in stable isotopes relative to the host.MethodsSharptooth catfish (Clarias gariepinus) were collected from six sites along the Vaal River, South Africa and were assessed for ectoparasites and endoparasites. Lamproglena clariae (Copepoda), Tetracampus ciliotheca and Proteocephalus glanduligerus (Cestoda), and larval Contracaecum sp. (Nematoda) were collected from the gills, intestine and mesenteries, respectively. Signatures of δ 13 C and δ 15 N were analysed in host muscle tissue and parasites using bulk stable isotope analysis.ResultsStable isotope enrichment was variable between parasites and the host fish, with L. clariae and the host sharing similar δ 15 N signatures and the endoparasites being depleted in both δ 13 C and δ 15 N relative to the host. Spatial differences in enrichment of stable isotopes were also identified. Fish and parasites collected from below the Vaal River Barrage were more enriched in the 15 N isotope than hosts and parasites collected from other sites. The opposite was identified for 13 C isotope fractionation.ConclusionDifferences in stable isotope enrichment in parasites infecting C. gariepinus could be related to the feeding strategy of each parasite species collected. Enrichment of δ 15 N in L. clariae would relate to the micropredatory nature of this parasite, which feeds on whole blood of the host fish. Depleted isotope levels in endoparasites could relate to their absorptive feeding strategy on metabolic by-products of the host. Spatial differences in both host and parasite tissues identified likely resulted from differences in the diet of the host and related with availability of prey items for the host fish.

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“…Boag et al , 1998; Neilson & Brown, 1999). Among fish host–parasite systems, nematodes and cestodes exhibit depleted δ 15 N relative to their hosts, while parasitic copepods and isopods appear isotopically depleted and enriched, respectively, compared with their host fish (Iken et al , 2001; Pinnegar et al , 2001; Deudero et al, 2002; Power & Klein, 2004; Xu et al , 2007; Navarro et al , 2013). These and further confounding data gathered from other parasite–host systems (Neilson et al , 2005; O'Grady & Dearing, 2006) suggest that the isotopic signatures of parasites do not always fit with the consumer–diet discrimination pattern seen in other trophic systems.…”

Section: Introductionmentioning

confidence: 99%

Multiple isotope analyses of the pike tapewormTriaenophorus nodulosusreveal peculiarities in consumer–diet discrimination patterns

Behrmann‐Godel

Yohannes

2014

J. Helminthol.

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Previous studies of dietary isotope discrimination have led to the general expectation that a consumer will exhibit enriched stable isotope levels relative to its diet. Parasite-host systems are specific consumer-diet pairs in which the consumer (parasite) feeds exclusively on one dietary source: host tissue. However, the small numbers of studies previously carried out on isotopic discrimination in parasite-host (ΔXP-HT) systems have yielded controversial results, showing some parasites to be isotopically depleted relative to their food source, while others are enriched or in equilibrium with their hosts. Although the mechanism for these deviations from expectations remains to be understood, possible influences of specific feeding niche or selection for only a few nutritional components by the parasite are discussed. ΔXP-HT for multiple isotopes (δ13C, δ15N, δ34S) were measured in the pike tapeworm Triaenophorus nodulosus and two of its life-cycle fish hosts, perch Perca fluviatilis and pike Esox lucius, within which T. nodulosus occupies different feeding locations. Variability in the value of ΔXP-HT calculated for the parasite and its different hosts indicates an influence of feeding location on isotopic discrimination. In perch liver ΔXP-HT was relatively more negative for all three stable isotopes. In pike gut ΔXP-HT was more positive for δ13C, as expected in conventional consumer-diet systems. For parasites feeding on pike gut, however, the δ15N and δ34S isotope values were comparable with those of the host. We discuss potential causes of these deviations from expectations, including the effect of specific parasite feeding niches, and conclude that ΔXP-HT should be critically evaluated for trophic interactions between parasite and host before general patterns are assumed.

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Trophic Relationship between the Parasitic IsopodIchthyoxenus japonensisand the FishCarassius auratus auratusAs Revealed by Stable Isotopes

Cited by 10 publications

References 30 publications

Trophic relationship between the invasive parasitic copepod Mytilicola orientalis and its native blue mussel (Mytilus edulis) host

Trophic relationship between the invasive parasitic copepod Mytilicola orientalis and its native blue mussel (Mytilus edulis) host

Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa

Multiple isotope analyses of the pike tapewormTriaenophorus nodulosusreveal peculiarities in consumer–diet discrimination patterns

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