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Article: First report of microsporidians in the non-native shrimp Neocaridina davidi from a temperate European stream.

Schneider, Richard / Prati, Sebastian / Grabner, Daniel / Sures, Bernd

Diseases of aquatic organisms

2022 Volume 150, Page(s) 125–130

Abstract: The release of ornamental pets outside their native range can directly or indirectly impact the recipient community, e.g. via the co-introduction of associated pathogens. However, studies on parasites associated with non-native species, in particular ... ...

Abstract	The release of ornamental pets outside their native range can directly or indirectly impact the recipient community, e.g. via the co-introduction of associated pathogens. However, studies on parasites associated with non-native species, in particular freshwater decapods, have focused mainly on a limited set of pathogens. Here we provide data for the first time on microsporidian parasites of the non-native ornamental shrimp Neocaridina davidi, collected in a stream in Germany. Furthermore, we confirm an ongoing range expansion of the warm-adapted N. davidi from thermally polluted colder water. In the investigated shrimps, the microsporidian parasite Enterocytozoon hepatopenaei and an unknown microsporidian isolate were detected, raising concerns about their transmission potential and pathogenicity on native crustacean species.
MeSH term(s)	Animals ; Decapoda ; Enterocytozoon/genetics ; Microsporidia ; Penaeidae/parasitology ; Polymerase Chain Reaction/veterinary ; Rivers
Language	English
Publishing date	2022-08-04
Publishing country	Germany
Document type	Journal Article
ISSN	0177-5103
ISSN	0177-5103
DOI	10.3354/dao03681
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Article ; Online: Ecological Drivers of Mercury Bioaccumulation in Fish of a Subarctic Watercourse

Amundsen, Per‐Arne / Henriksson, Matilda / Poste, Amanda / Prati, Sebastian / Power, Michael

Environmental Toxicology and Chemistry. 2023 Apr., v. 42, no. 4 p.873-887

2023

Abstract: Mercury (Hg) is a serious concern for aquatic ecosystems because it may biomagnify to harmful concentrations within food webs and consequently end up in humans that eat fish. However, the trophic transfer of mercury through the aquatic food web may be ... ...

Abstract	Mercury (Hg) is a serious concern for aquatic ecosystems because it may biomagnify to harmful concentrations within food webs and consequently end up in humans that eat fish. However, the trophic transfer of mercury through the aquatic food web may be impacted by several factors related to network complexity and the ecology of the species present. The present study addresses the interplay between trophic ecology and mercury contamination in the fish communities of two lakes in a pollution‐impacted subarctic watercourse, exploring the role of both horizontal (feeding habitat) and vertical (trophic position) food web characteristics as drivers for the Hg contamination in fish. The lakes are located in the upper and lower parts of the watercourse, with the lower site located closer to, and downstream from, the main pollution source. The lakes have complex fish communities dominated by coregonids (polymorphic whitefish and invasive vendace) and several piscivorous species. Analyses of habitat use, stomach contents, and stable isotope signatures (δ¹⁵N, δ¹³C) revealed similar food web structures in the two lakes except for a few differences chiefly related to ecological effects of the invasive vendace. The piscivores had higher Hg concentrations than invertebrate‐feeding fish. Concentrations increased with size and age for the piscivores and vendace, whereas habitat differences were of minor importance. Most fish species showed significant differences in Hg concentrations between the lakes, the highest values typically found in the downstream site where the biomagnification rate also was higher. Mercury levels in piscivorous fish included concentrations that exceed health authorization limits, with possible negative implications for fishing and human consumption. Our findings accentuate the importance of acquiring detailed knowledge of the drivers that can magnify Hg concentrations in fish and how these may vary within and among aquatic systems, to provide a scientific basis for adequate management strategies. Environ Toxicol Chem 2023;42:873–887. © 2023 SETAC
Keywords	aquatic food webs ; bioaccumulation ; chemistry ; ecotoxicology ; habitat preferences ; habitats ; humans ; mercury ; piscivorous fish ; pollution ; stable isotopes ; stomach
Language	English
Dates of publication	2023-04
Size	p. 873-887.
Publishing place	John Wiley & Sons, Ltd
Document type	Article ; Online
Note	JOURNAL ARTICLE
ZDB-ID	46234-2
ISSN	1552-8618 ; 0730-7268
ISSN (online)	1552-8618
ISSN	0730-7268
DOI	10.1002/etc.5580
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Article ; Online: Ecological Drivers of Mercury Bioaccumulation in Fish of a Subarctic Watercourse.

Amundsen, Per-Arne / Henriksson, Matilda / Poste, Amanda / Prati, Sebastian / Power, Michael

Environmental toxicology and chemistry

2023 Volume 42, Issue 4, Page(s) 873–887

Abstract	Mercury (Hg) is a serious concern for aquatic ecosystems because it may biomagnify to harmful concentrations within food webs and consequently end up in humans that eat fish. However, the trophic transfer of mercury through the aquatic food web may be impacted by several factors related to network complexity and the ecology of the species present. The present study addresses the interplay between trophic ecology and mercury contamination in the fish communities of two lakes in a pollution-impacted subarctic watercourse, exploring the role of both horizontal (feeding habitat) and vertical (trophic position) food web characteristics as drivers for the Hg contamination in fish. The lakes are located in the upper and lower parts of the watercourse, with the lower site located closer to, and downstream from, the main pollution source. The lakes have complex fish communities dominated by coregonids (polymorphic whitefish and invasive vendace) and several piscivorous species. Analyses of habitat use, stomach contents, and stable isotope signatures (δ
MeSH term(s)	Animals ; Humans ; Mercury/analysis ; Ecosystem ; Bioaccumulation ; Environmental Monitoring ; Invertebrates ; Food Chain ; Lakes/chemistry ; Water Pollutants, Chemical/analysis ; Fishes
Chemical Substances	Mercury (FXS1BY2PGL) ; Water Pollutants, Chemical
Language	English
Publishing date	2023-03-10
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	46234-2
ISSN	1552-8618 ; 0730-7268
ISSN (online)	1552-8618
ISSN	0730-7268
DOI	10.1002/etc.5580
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Article ; Online: Epibiont Cohabitation in Freshwater Shrimp Neocaridina davidi with the Description of Two Species New to Science, Cladogonium kumaki sp. nov. and Monodiscus kumaki sp. nov., and Redescription of Scutariella japonica and Holtodrilus truncatus

Maciaszek, Rafał / Świderek, Wiesław / Prati, Sebastian / Huang, Chih-Yang / Karaban, Kamil / Kaliszewicz, Anita / Jablonska, Alejandra

Animals. 2023 May 12, v. 13, no. 10

2023

Abstract: This contribution presents the occurrence of epibiotic species associated with Neocaridina davidi shrimp collected in the wild, aquaculture ponds, and aquaria. A total of 900 shrimp are imported from Taiwan, three-quarters of which host at least one of ... ...

Abstract	This contribution presents the occurrence of epibiotic species associated with Neocaridina davidi shrimp collected in the wild, aquaculture ponds, and aquaria. A total of 900 shrimp are imported from Taiwan, three-quarters of which host at least one of the recorded epibionts. Among those epibionts, two species new to science are discovered, Cladogonium kumaki sp. nov. and Monodiscus kumaki sp. nov., while the other two, Holtodrilus truncatus and Scutariella japonica, are redescribed. The largest number of epibionts is found in shrimp collected from aquaculture ponds and the lowest in individuals from aquaria. Epibiont occurrence differs across designated microhabitats. The epibionts may be introduced alongside their host outside their native range, and their presence may affect shrimp breeding rates. Thus, more control over them should be provided. Their spread can be limited by removal from the host during molting or manually, as well as by using interspecies interactions.
Keywords	aquaculture ; epibionts ; redescriptions ; shrimp ; Taiwan
Language	English
Dates of publication	2023-0512
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article ; Online
ZDB-ID	2606558-7
ISSN	2076-2615
ISSN	2076-2615
DOI	10.3390/ani13101616
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Article ; Online: Histopathological screening of Pontogammarus robustoides (Amphipoda), an invader on route to the United Kingdom

Warren, Daniel A. / Burgess, Amy L. / Prati, Sebastian / Bacela-Spychalska, Karolina / S. J. Rogers, Martin / Bojko, Jamie

Journal of Invertebrate Pathology. 2023 Sept., v. 200 p.107970-

2023

Abstract: Biological invasions may act as conduits for pathogen introduction. To determine which invasive non-native species pose the biggest threat, we must first determine the symbionts (pathogens, parasites, commensals, mutualists) they carry, via pathological ... ...

Abstract	Biological invasions may act as conduits for pathogen introduction. To determine which invasive non-native species pose the biggest threat, we must first determine the symbionts (pathogens, parasites, commensals, mutualists) they carry, via pathological surveys that can be conducted in multiple ways (i.e., molecular, pathological, and histological). Whole animal histopathology allows for the observation of pathogenic agents (virus to Metazoa), based on their pathological effect upon host tissue. Where the technique cannot accurately predict pathogen taxonomy, it does highlight pathogen groups of importance. This study provides a histopathological survey of Pontogammarus robustoides (invasive amphipod in Europe) as a baseline for symbiont groups that may translocate to other areas/hosts in future invasions. Pontogammarus robustoides (n = 1,141) collected throughout Poland (seven sites), were noted to include a total of 13 symbiotic groups: a putative gut epithelia virus (overall prevalence = 0.6%), a putative hepatopancreatic cytoplasmic virus (1.4%), a hepatopancreatic bacilliform virus (15.7%), systemic bacteria (0.7%), fouling ciliates (62.0%), gut gregarines (39.5%), hepatopancreatic gregarines (0.4%), haplosporidians (0.4%), muscle infecting microsporidians (6.4%), digeneans (3.5%), external rotifers (3.0%), an endoparasitic arthropod (putatively: Isopoda) (0.1%), and Gregarines with putative microsporidian infections (1.4%). Parasite assemblages partially differed across collection sites. Co-infection patterns revealed strong positive and negative associations between five parasites. Microsporidians were common across sites and could easily spread to other areas following the invasion of P. robustoides. By providing this initial histopathological survey, we hope to provide a concise list of symbiont groups for risk-assessment in the case of a novel invasion by this highly invasive amphipod.
Keywords	Amphipoda ; Ciliophora ; Isopoda ; Microsporidia ; Rotifera ; arthropods ; digestive system ; endoparasites ; gregarines ; histology ; histopathology ; introduced species ; invasive species ; mixed infection ; muscles ; pathogens ; risk assessment ; surveys ; symbionts ; taxonomy ; viruses ; Poland ; United Kingdom ; Biological Invasions ; Haplosporidium ; Parasite
Language	English
Dates of publication	2023-09
Publishing place	Elsevier Inc.
Document type	Article ; Online
ZDB-ID	390885-9
ISSN	1096-0805 ; 0022-2011
ISSN (online)	1096-0805
ISSN	0022-2011
DOI	10.1016/j.jip.2023.107970
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Generalist parasites persist in degraded environments: a lesson learned from microsporidian diversity in amphipods.

Prati, Sebastian / Grabner, Daniel S / Pfeifer, Svenja M / Lorenz, Armin W / Sures, Bernd

Parasitology

2022 , Page(s) 1–10

Abstract: The present study provides new insight into suitable microsporidian–host associations. It relates regional and continental-wide host specialization in microsporidians infecting amphipods to degraded and recovering habitats across 2 German river ... ...

Abstract	The present study provides new insight into suitable microsporidian–host associations. It relates regional and continental-wide host specialization in microsporidians infecting amphipods to degraded and recovering habitats across 2 German river catchments. It provides a unique opportunity to infer the persistence of parasites following anthropogenic disturbance and their establishment in restored rivers. Amphipods were collected in 31 sampling sites with differing degradation and restoration gradients. Specimens were morphologically (hosts) and molecularly identified (host and parasites). Amphipod diversity and abundance, microsporidian diversity, host phylogenetic specificity and continental-wide β-specificity were investigated and related to each other and/or environmental variables. Fourteen microsporidian molecular operational taxonomic units (MOTUs), mainly generalist parasites, infecting 6 amphipod MOTUs were detected, expanding the current knowledge on the host range by 17 interactions. There was no difference in microsporidian diversity and host specificity among restored and near-natural streams (Boye) or between those located in urban and rural areas (Kinzig). Similarly, microsporidian diversity was generally not influenced by water parameters. In the Boye catchment, host densities did not influence microsporidian MOTU richness across restored and near-natural sites. High host turnover across the geographical range suggests that neither environmental conditions nor host diversity plays a significant role in the establishment into restored areas. Host diversity and environmental parameters do not indicate the persistence and dispersal of phylogenetic host generalist microsporidians in environments that experienced anthropogenic disturbance. Instead, these might depend on more complex mechanisms such as the production of resistant spores, host switching and host dispersal acting individually or conjointly.
Language	English
Publishing date	2022-04-08
Publishing country	England
Document type	Journal Article
ZDB-ID	207627-5
ISSN	1469-8161 ; 0031-1820
ISSN (online)	1469-8161
ISSN	0031-1820
DOI	10.1017/S0031182022000452
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Article ; Online: Possible seasonal and diurnal modulation of Gammarus pulex (Crustacea, Amphipoda) drift by microsporidian parasites.

Prati, Sebastian / Enß, Julian / Grabner, Daniel S / Huesken, Annabell / Feld, Christian K / Doliwa, Annemie / Sures, Bernd

Scientific reports

2023 Volume 13, Issue 1, Page(s) 9474

Abstract: In lotic freshwater ecosystems, the drift or downstream movement of animals (e.g., macroinvertebrates) constitutes a key dispersal pathway, thus shaping ecological and evolutionary patterns. There is evidence that macroinvertebrate drift may be modulated ...

Abstract	In lotic freshwater ecosystems, the drift or downstream movement of animals (e.g., macroinvertebrates) constitutes a key dispersal pathway, thus shaping ecological and evolutionary patterns. There is evidence that macroinvertebrate drift may be modulated by parasites. However, most studies on parasite modulation of host drifting behavior have focused on acanthocephalans, whereas other parasites, such as microsporidians, have been largely neglected. This study provides new insight into possible seasonal and diurnal modulation of amphipod (Crustacea: Gammaridae) drift by microsporidian parasites. Three 72 h drift experiments were deployed in a German lowland stream in October 2021, April, and July 2022. The prevalence and composition of ten microsporidian parasites in Gammarus pulex clade E varied seasonally, diurnally, and between drifting and stationary specimens of G. pulex. Prevalence was generally higher in drifting amphipods than in stationary ones, mainly due to differences in host size. However, for two parasites, the prevalence in drift samples was highest during daytime suggesting changes in host phototaxis likely related to the parasite's mode of transmission and site of infection. Alterations in drifting behavior may have important implications for G. pulex population dynamics and microsporidians' dispersal. The underlying mechanisms are more complex than previously thought.
MeSH term(s)	Animals ; Amphipoda/parasitology ; Parasites ; Microsporidia ; Ecosystem ; Seasons ; Host-Parasite Interactions ; Crustacea
Language	English
Publishing date	2023-06-10
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-36630-2
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Article: Epibiont Cohabitation in Freshwater Shrimp

Maciaszek, Rafał / Świderek, Wiesław / Prati, Sebastian / Huang, Chih-Yang / Karaban, Kamil / Kaliszewicz, Anita / Jabłońska, Aleksandra

Animals : an open access journal from MDPI

2023 Volume 13, Issue 10

Abstract: This contribution presents the occurrence of epibiotic species associated ... ...

Abstract	This contribution presents the occurrence of epibiotic species associated with
Language	English
Publishing date	2023-05-12
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2606558-7
ISSN	2076-2615
ISSN	2076-2615
DOI	10.3390/ani13101616
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Article ; Online: Histopathological screening of Pontogammarus robustoides (Amphipoda), an invader on route to the United Kingdom.

Warren, Daniel A / Burgess, Amy L / Prati, Sebastian / Bacela-Spychalska, Karolina / S J Rogers, Martin / Bojko, Jamie

Journal of invertebrate pathology

2023 Volume 200, Page(s) 107970

Abstract	Biological invasions may act as conduits for pathogen introduction. To determine which invasive non-native species pose the biggest threat, we must first determine the symbionts (pathogens, parasites, commensals, mutualists) they carry, via pathological surveys that can be conducted in multiple ways (i.e., molecular, pathological, and histological). Whole animal histopathology allows for the observation of pathogenic agents (virus to Metazoa), based on their pathological effect upon host tissue. Where the technique cannot accurately predict pathogen taxonomy, it does highlight pathogen groups of importance. This study provides a histopathological survey of Pontogammarus robustoides (invasive amphipod in Europe) as a baseline for symbiont groups that may translocate to other areas/hosts in future invasions. Pontogammarus robustoides (n = 1,141) collected throughout Poland (seven sites), were noted to include a total of 13 symbiotic groups: a putative gut epithelia virus (overall prevalence = 0.6%), a putative hepatopancreatic cytoplasmic virus (1.4%), a hepatopancreatic bacilliform virus (15.7%), systemic bacteria (0.7%), fouling ciliates (62.0%), gut gregarines (39.5%), hepatopancreatic gregarines (0.4%), haplosporidians (0.4%), muscle infecting microsporidians (6.4%), digeneans (3.5%), external rotifers (3.0%), an endoparasitic arthropod (putatively: Isopoda) (0.1%), and Gregarines with putative microsporidian infections (1.4%). Parasite assemblages partially differed across collection sites. Co-infection patterns revealed strong positive and negative associations between five parasites. Microsporidians were common across sites and could easily spread to other areas following the invasion of P. robustoides. By providing this initial histopathological survey, we hope to provide a concise list of symbiont groups for risk-assessment in the case of a novel invasion by this highly invasive amphipod.
MeSH term(s)	Animals ; Amphipoda/microbiology ; Host-Parasite Interactions ; Parasites ; Microsporidia ; United Kingdom ; Introduced Species ; Apicomplexa/physiology
Language	English
Publishing date	2023-07-06
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	390885-9
ISSN	1096-0805 ; 0022-2011
ISSN (online)	1096-0805
ISSN	0022-2011
DOI	10.1016/j.jip.2023.107970
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Article: Simulating more realistic predation threat using attack playbacks.

Watve, Mukta / Prati, Sebastian / Taborsky, Barbara

PeerJ

2019 Volume 7, Page(s) e8149

Abstract: Use of virtual proxies of live animals are rapidly gaining ground in studies of animal behaviour. Such proxies help to reduce the number of live experimental animals needed to stimulate the behaviour of experimental individuals and to increase ... ...

Abstract	Use of virtual proxies of live animals are rapidly gaining ground in studies of animal behaviour. Such proxies help to reduce the number of live experimental animals needed to stimulate the behaviour of experimental individuals and to increase standardisation. However, using too simplistic proxies may fail to induce a desired effect and/or lead to quick habituation. For instance, in a predation context, prey often employ multimodal cues to detect predators or use specific aspects of predator behaviour to assess threat. In a live interaction, predator and prey often show behaviours directed towards each other, which are absent in virtual proxies. Here we compared the effectiveness of chemical and visual predator cues in the cooperatively breeding cichlid
Language	English
Publishing date	2019-12-19
Publishing country	United States
Document type	Journal Article
ZDB-ID	2703241-3
ISSN	2167-8359
ISSN	2167-8359
DOI	10.7717/peerj.8149
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