When invaders collide: competition, aggression, and predators affect outcomes in overlapping populations of red swamp (Procambarus clarkii) and rusty (Faxonius rusticus) crayfishes

O’Shaughnessey, Erin M.; Keller, Reuben P.

doi:10.1007/s10530-019-02079-6

Cited by 3 publications

(2 citation statements)

References 49 publications

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“…Procambarus clarkii has been associated with declines in macrophytes, macroinvertebrates, amphibians, fish, and native crayfish (Gherardi, 2006;Twardochleb, Olden & Larson, 2013). A population of P. clarkii has recently established in the Chicago River in Illinois, USA (Taylor & Tucker, 2005;Peters et al, 2014), where it has been a target of research and eradication efforts (O'Shaughnessey & Keller, 2019). In this study, we deployed dead P. clarkii (removed from the Chicago River) in a stream enclosure experiment and collected water samples to examine relationships between the decay of crayfish carcasses and detection of eDNA.…”

Section: Introductionmentioning

confidence: 99%

No evidence that crayfish carcasses produce detectable environmental DNA (eDNA) in a stream enclosure experiment

Curtis

Larson

2020

PeerJ

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Environmental DNA (eDNA) is an emerging tool for monitoring invasive and imperiled species, particularly at low densities. However, the factors that control eDNA production, transport, and persistence in aquatic systems remain poorly understood. For example, the extent to which carcasses produce detectable eDNA is unknown. If positive detections are associated with dead organisms, this could confound monitoring for imperiled or invasive species. Here, we present results from one of the first studies to examine carcass eDNA in situ by deploying carcasses of the invasive red swamp crayfish (Procambarus clarkii) in a stream enclosure experiment for 28 days. We predicted that carcasses would initially produce eDNA that would decline over time as carcasses decayed. Unsurprisingly, crayfish carcasses lost biomass over time, but at the conclusion of our experiment much of the carapace and chelae remained. However, no eDNA of P. clarkii was detected in any of our samples at the crayfish density (15 P. clarkii carcasses at ∼615 g of biomass initially), stream flow (520–20,319 L/s), or temperature (∼14–25 °C) at our site. Subsequent analyses demonstrated that these results were not the consequence of PCR inhibition in our field samples, poor performance of the eDNA assay for intraspecific genetic diversity within P. clarkii, or due to the preservation and extraction procedure used. Therefore, our results suggest that when crayfish are relatively rare, such as in cases of new invasive populations or endangered species, carcasses may not produce detectable eDNA. In such scenarios, positive detections from field studies may be more confidently attributed to the presence of live organisms. We recommend that future studies should explore how biomass, flow, and differences in system (lentic vs. lotic) influence the ability to detect eDNA from carcasses.

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Section: Introductionmentioning

confidence: 99%

No evidence that crayfish carcasses produce detectable environmental DNA (eDNA) in a stream enclosure experiment

Curtis

Larson

2020

PeerJ

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“…

The red swamp crayfish Procambarus clarkii is native to northern Mexico and the southern and south-eastern United States. It was introduced in China from Japan in the 1930s (Lodge et al, 2000;O'Shaughnessey & Keller, 2019;Shen et al, 2014). Due to its high nutritional value combined with a unique flavour, it has great economic value and is extensively cultured in China (Kang et al, 2019;Meng et al, 2019).

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mentioning

confidence: 99%

A novel Dicistro‐like virus discovered in Procambarus clarkii with “Black May” disease

Huang

Shen

Gong

et al. 2020

Journal of Fish Diseases

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The peak period of morbidity and death in cultured Procambarus clarkii is around May each year and is called the “Black May” disease. The pathogen causing “Black May” disease is believed to be a white spot syndrome virus (WSSV). In 2018, a significant number of P. clarkii died in the pond culture of Xinglong Township, Xuyi County. Two sampling tests on the affected pond showed that, in addition to WSSV, a novel Dicistro‐like virus (PcDV) was present. Genomic sequence analysis indicated that this new virus belongs to the Dicistroviridae family, Picornaviridaes order. A high number of spherical particles were detected in gill tissues of P. clarkii with “Black May” disease by electron microscopy, a finding consistent with viruses from the Picornaviridaes order. From October 2018 to September 2019, we took monthly samples from Hubei, Jiangsu and Anhui provinces, and tested for the presence of PcDV and WSSV in P. clarkii. The detection rates of PcDV in P. clarkii peaked from April to June, consistent with the onset of the “Black May” disease. In conclusion, we believe that the discovery of PcDV will provide new research directions for investigating the pathogens causing “Black May” disease in P. clarkii.

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Distribution of crayfish in the Southern Basin of Lake Michigan and the Greater Chicago Region

O’Shaughnessey

Egly

Harris

et al. 2021

Journal of Great Lakes Research

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When invaders collide: competition, aggression, and predators affect outcomes in overlapping populations of red swamp (Procambarus clarkii) and rusty (Faxonius rusticus) crayfishes

Cited by 3 publications

References 49 publications

No evidence that crayfish carcasses produce detectable environmental DNA (eDNA) in a stream enclosure experiment

No evidence that crayfish carcasses produce detectable environmental DNA (eDNA) in a stream enclosure experiment

A novel Dicistro‐like virus discovered in Procambarus clarkii with “Black May” disease

Distribution of crayfish in the Southern Basin of Lake Michigan and the Greater Chicago Region

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