The role of invasive tunicates as reservoirs of molluscan pathogens

Costello, Katie E.; Lynch, Sharon A.; McAllen, Rob; O’Riordan, Ruth M.; Culloty, Sarah C.

doi:10.1007/s10530-020-02392-5

Cited by 12 publications

(9 citation statements)

References 41 publications

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“…Non-bivalve taxa can serve as carriers or reservoirs of bivalve disease, maintaining bivalve pathogens even when bivalve hosts are absent. For example, Costello et al (2020) confirmed that invasive tunicates can harbour oyster pathogens, both protistan and bacterial. One such species (the club tunicate Styela clava) maintained the protistan B. ostreae with no oyster hosts present, indicating it can potentially act as a reservoir of the parasite.…”

Section: Mytilicola Intestinalismentioning

confidence: 84%

The Importance of Marine Bivalves in Invasive Host–Parasite Introductions

et al. 2021

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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.

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Section: Mytilicola Intestinalismentioning

confidence: 84%

The Importance of Marine Bivalves in Invasive Host–Parasite Introductions

et al. 2021

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“…The spread of B. exitiosa, from southern New Zealand to the Northern Hemisphere (Bishop et al, 2006;Abollo et al, 2008;Longshaw et al, 2013) and Argentina (Kroeck and Montes, 2005), has similarly been associated with shipping (Hill-Spanik et al, 2015;Lane et al, 2018). B. ostreae and other molluscan pathogens are associated with non-indigenous ascidians (Costello et al, 2020), highlighting the potential role of non-molluscan biofouling species as vectors of this pathogen.…”

Section: Analysis Analysis Scopementioning

confidence: 99%

“…While vessel biofouling regulations have been enacted by some jurisdictions (California Code of Regulations, 2017; Ministry for Primary Industries New Zealand [MPI], 2018;Georgiades et al, 2020), these are focused largely on preventing the translocation of marine non-indigenous macro-organisms (e.g., Bell et al, 2011). New information on translocation of pathogens associated with biofouling is emerging, however (e.g., Lane et al, 2018;Itoh et al, 2019;Costello et al, 2020;Lane and Jones, 2020;Pagenkopp-Lohan et al, 2020). Biofouling management measures routinely applied to vessels, such as in-water cleaning of macrofouling [i.e., reactive in-water cleaning (RIC)], are also cause for concern as they may increase the likelihood of pathogen release and establishment into new areas (Scianni and Georgiades, 2019).…”

Section: Introductionmentioning

confidence: 99%

The Role of Vessel Biofouling in the Translocation of Marine Pathogens: Management Considerations and Challenges

Georgiades

Scianni²,

Davidson

et al. 2021

Front. Mar. Sci.

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Vessel biofouling is a major pathway for the introduction, establishment, and subsequent spread of marine non-indigenous macro-organisms. As a result, national and international regulations and guidelines have been implemented to manage the risks associated with this pathway, yet widespread enforcement and uptake are still in their infancy. By comparison, translocation of marine pathogens by vessel biofouling has received little attention despite a mounting body of evidence highlighting the potential importance of this pathway. Using molluscan pathogens as a model, this paper examines the potential for translocation of marine pathogens via the vessel biofouling pathway by reviewing: (1) examples where vessel biofouling is suspected to be the source pathway of non-indigenous pathogen introduction to new areas, and (2) the association between pathogens known to have detrimental effects on wild and farmed mollusk populations with species known to foul vessels and anthropogenic structures. The available evidence indicates that vessel biofouling is a viable and important pathway for translocating marine pathogens, presenting a risk to marine values (i.e., environmental, economic, social, and cultural). While preventive measures to minimize the translocation of macro-organisms are the most efficient way to minimize the likelihood of associated pathogen translocation, the application of reactive management measures to biofouled vessels, including post-filtration treatment, requires further and explicit consideration.

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“…Tunicates usually occur in relatively low abundance in coastal waters. However, some tunicates are reported as invasive species in some coastal waters [171] and are known to cause space competition [172], damage to aquaculture [173,174] by harboring pathogenic viruses and bacteria [175], and ecosystem alteration within the spread area [176]. Few non-invasive tunicate species of the coral reef environment have also been reported to overgrow on massive corals and caused minimal [112] or partial inhibition or delayed development of coral polyps [177].…”

Section: Utilization Of Invasive Tunicates Resourcesmentioning

confidence: 99%

Marine Natural Products from Tunicates and Their Associated Microbes

Ramesh

Tulasi²,

Mohanraju

et al. 2021

Marine Drugs

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Marine tunicates are identified as a potential source of marine natural products (MNPs), demonstrating a wide range of biological properties, like antimicrobial and anticancer activities. The symbiotic relationship between tunicates and specific microbial groups has revealed the acquisition of microbial compounds by tunicates for defensive purpose. For instance, yellow pigmented compounds, “tambjamines”, produced by the tunicate, Sigillina signifera (Sluiter, 1909), primarily originated from their bacterial symbionts, which are involved in their chemical defense function, indicating the ecological role of symbiotic microbial association with tunicates. This review has garnered comprehensive literature on MNPs produced by tunicates and their symbiotic microbionts. Various sections covered in this review include tunicates’ ecological functions, biological activities, such as antimicrobial, antitumor, and anticancer activities, metabolic origins, utilization of invasive tunicates, and research gaps. Apart from the literature content, 20 different chemical databases were explored to identify tunicates-derived MNPs. In addition, the management and exploitation of tunicate resources in the global oceans are detailed for their ecological and biotechnological implications.

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The role of invasive tunicates as reservoirs of molluscan pathogens

Cited by 12 publications

References 41 publications

The Importance of Marine Bivalves in Invasive Host–Parasite Introductions

The Importance of Marine Bivalves in Invasive Host–Parasite Introductions

The Role of Vessel Biofouling in the Translocation of Marine Pathogens: Management Considerations and Challenges

Marine Natural Products from Tunicates and Their Associated Microbes

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