Integrating models to predict distribution of the invertebrate host of myxosporean parasites

Alexander, Julie D.; Bartholomew, Jerri L.; Wright, Katrina; Som, Nicholas A.; Hetrick, Nicholas J.

doi:10.1086/688342

Cited by 20 publications

(30 citation statements)

References 50 publications

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“…To confirm identity and infection status, we examined additional archived annelid samples collected opportunistically 2006-2018 by Oregon State University as part of our long term, on-going ecological and disease studies of parasites C. shasta and P. minibicornis. These samples were collected from localities in the Klamath and Willamette Rivers (Stocking & Bartholomew 2007;Bjork & Bartholomew 2009;Atkinson et al 2011;Hurst et al 2012;Alexander et al 2016). We also obtained M. speciosa from Lake Superior (St. Marys River, Ontario, Canada) and South River, New Jersey, in 2009.…”

Section: Methodsmentioning

confidence: 99%

The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

Bartholomew

Rouse

2020

Zootaxa

Self Cite

846

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The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae) Abstract Myxosporea (Cnidaria: Myxozoa) are common fish parasites with complex life cycles that involve annelid hosts. Two economically important salmonid-infecting myxosporeans from rivers of the northwestern United States, Ceratonova shasta (Noble, 1950) and Parvicapsula minibicornis Kent et al., 1997, have life cycles that require a freshwater annelid host, identified previously as Manayunkia speciosa Leidy, 1859. This species was described originally from Pennsylvania, with subsequent records from New Jersey, the Great Lakes and west coast river basins. Despite apparent widespread distributions of both suitable fish hosts and the nominal annelid host, both parasites are restricted to river basins in the northwestern US and have never been recorded from the Great Lakes or the eastern US. In this study, we sampled 94 infected and uninfected annelids from two northwestern US rivers to confirm the identity of the host. We found these new specimens had mitochondrial COI sequences with no more than 4.5% distance from each other, but with at least 11% divergence from M. speciosa sampled from near the type locality (New Jersey) and Lake Superior. We did not recover any M. speciosa from either west coast river. The annelid from the Klamath and Willamette rivers showed marked sexual dimorphism that has not been reported in any Manayunkia described to date, though it is apparent that this had been missed in M. speciosa. Accordingly, we describe a new taxon, Manayunkia occidentalis sp. nov., and show that it can host both C. shasta and P. minibicornis. We suspect that previous records of Manayunkia from Pacific Northwest watersheds are likely to be M. occidentalis sp. nov. and not M. speciosa. Sampling of Manayunkia from additional localities is underway to test if the novel Manayunkia species is the only freshwater fabriciid annelid present across the Pacific Northwest.

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Section: Methodsmentioning

confidence: 99%

The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

Bartholomew

Rouse

2020

Zootaxa

Self Cite

846

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“…Fish population dynamics models, developed by the motivation to inform future management, have been constructed to include disease agent dynamics (Perry et al 2018). Additionally, there are models that target specific elements of agenthost ecology (Alexander et al 2016), which have been applied to simulate how resource management alternatives might affect disease risk (Som et al 2016). In the above cases, disease agent monitoring and research projects were specifically tailored for inclusion in decision support tools.…”

Section: Metrics That Matter Ii: To Inform Managementmentioning

confidence: 99%

Disease in Central Valley Salmon: Status and Lessons from Other Systems

Lehman

Johnson

Adkison

et al. 2020

SFEWS

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hinook Salmon (Oncorhynchus tshawytscha) are increasingly vulnerable to anthropogenic activities and climate change, especially at their most southern range in California’s Central Valley. There is considerable interest in understanding stressors that contribute to population decline and in identifying management actions that reduce the effects of those stressors. Along the west coast of North America, disease has been linked to declining numbers of salmonids, and identified as a key stressor that results in mortality. In the Central Valley, targeted studies have revealed extremely high prevalence of infectious agents and disease. However, there has been insufficient monitoring to understand the effect that disease may have on salmon populations. To inform future research, monitoring, and management efforts, a two-day workshop on salmon disease was held at the University of California, Davis (UC Davis) on March 14-15, 2018. This paper summarizes the science presented at this workshop, including the current state of knowledge of salmonid disease in the Central Valley, and current and emerging tools to better understand its effects on salmon. We highlight case studies from other systems where successful monitoring programs have been implemented. First, in the Klamath River where the integration of several data-collection and modeling approaches led to the development of successful management actions, and second in British Columbia where investment in researching novel technologies led to breakthroughs in the understanding of salmon disease dynamics. Finally, we identify key information and knowledge gaps necessary to guide research and management of disease in Central Valley salmon populations.

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“…Two‐dimensional hydrodynamic models have been used to evaluate aquatic habitat for a variety of fish species (Gard, ; Guay et al, ; Boavida et al, ) and invertebrates (Waddle and Holmquist, ; Alexander et al, ), as well as for planning and assessing river rehabilitation design (Wheaton et al, ; Pasternack et al, ; Brown and Pasternack, ; Gard, ). They are useful tools for describing the spatial distribution of hydraulic variables relevant to aquatic habitats, such as mean column water velocity (velocity), water depth (depth) and bed shear stress within the river channel over varying discharges.…”

Section: Introductionmentioning

confidence: 99%

Improving Hydrodynamic Modelling: an Analytical Framework for Assessment of Two‐Dimensional Hydrodynamic Models

Wright

Goodman

Som

et al. 2016

River Research & Apps

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Two-dimensional hydrodynamic models are increasingly common in riverine research and management. However, input data are not standardized among studies, and assessments of model performance are uncommon, which hinder interpretation of model results and comparisons among studies. Herein, we describe a framework for two-dimensional hydrodynamic model input data collection, model calibration and validation to evaluate model predictions. We present a logical process for the validation of depth and velocity that recognizes the inherent spatial uncertainty in the field measurements and modelling results. The hydrodynamic model we present as an example shows agreement between predicted and observed water surface elevation, area of inundation and spatial distributions of depth and velocity at calibration and independent validation discharges. If this model development and assessment framework was adopted by others, it would allow comparison between studies and provide a foundation for establishing model performance standards. Figure 6. Longitudinal water surface elevation plot comparing predicted (open circles) with observed (filled circles) values at T1 study site at a discharge of 58.1 m 3 s À1 (n = 719, RMSE = 0.0346).This was a discharge used for calibration K. A. WRIGHT ET AL.

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Integrating models to predict distribution of the invertebrate host of myxosporean parasites

Cited by 20 publications

References 50 publications

The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

Disease in Central Valley Salmon: Status and Lessons from Other Systems

Improving Hydrodynamic Modelling: an Analytical Framework for Assessment of Two‐Dimensional Hydrodynamic Models

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