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Nonlinear relationship between Silver Carp density and their eDNA concentration in a large river.
PLoS One. 2019; 14(6):e0218823.Plos

Abstract

Although environmental DNA (eDNA) is increasingly being used to survey for the presence of rare and/or invasive fishes in aquatic systems, the utility of this technique has been limited by a poor understanding of whether and how eDNA concentrations relate to fish density, especially in rivers. We conducted a field study to systematically test whether the eDNA released by a model invasive fish, Silver Carp (Hypophthalmichthys molitrix), was related to the density of this species in a large river. We quantified fish density throughout the 460 km long Illinois River using hydroacoustic surveys at 23 sites while concurrently collecting 192 surface water samples for eDNA analysis. We found that Silver Carp numerical density and biomass density were positively and non-linearly related to eDNA concentration and detection rate. Both eDNA concentration (copy number) and detection rate increased rapidly as Silver Carp density increased but plateaued at moderate densities. These relationships could prove useful for estimating Silver Carp relative abundance in newly invaded locations where population numbers are low to moderate. Future studies should explore the causes of this nonlinear relationship as it would ultimately benefit aquatic species monitoring and management programs.

Authors+Show Affiliations

Center for Fisheries, Aquaculture, and Aquatic Sciences, Department of Zoology, Southern Illinois University, Carbondale, Illinois, United States of America.BioTechnology Institute, University of Minnesota, Twin Cities, St. Paul, Minnesota, United States of America. Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, St. Paul, Minnesota, United States of America.Center for Fisheries, Aquaculture, and Aquatic Sciences, Department of Zoology, Southern Illinois University, Carbondale, Illinois, United States of America.Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, St. Paul, Minnesota, United States of America.Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, St. Paul, Minnesota, United States of America.Center for Fisheries, Aquaculture, and Aquatic Sciences, Department of Zoology, Southern Illinois University, Carbondale, Illinois, United States of America.Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, St. Paul, Minnesota, United States of America.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

31242242

Citation

Coulter, David P., et al. "Nonlinear Relationship Between Silver Carp Density and Their eDNA Concentration in a Large River." PloS One, vol. 14, no. 6, 2019, pp. e0218823.
Coulter DP, Wang P, Coulter AA, et al. Nonlinear relationship between Silver Carp density and their eDNA concentration in a large river. PLoS ONE. 2019;14(6):e0218823.
Coulter, D. P., Wang, P., Coulter, A. A., Van Susteren, G. E., Eichmiller, J. J., Garvey, J. E., & Sorensen, P. W. (2019). Nonlinear relationship between Silver Carp density and their eDNA concentration in a large river. PloS One, 14(6), e0218823. https://doi.org/10.1371/journal.pone.0218823
Coulter DP, et al. Nonlinear Relationship Between Silver Carp Density and Their eDNA Concentration in a Large River. PLoS ONE. 2019;14(6):e0218823. PubMed PMID: 31242242.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nonlinear relationship between Silver Carp density and their eDNA concentration in a large river. AU - Coulter,David P, AU - Wang,Ping, AU - Coulter,Alison A, AU - Van Susteren,Grace E, AU - Eichmiller,Jessica J, AU - Garvey,James E, AU - Sorensen,Peter W, Y1 - 2019/06/26/ PY - 2019/02/23/received PY - 2019/06/10/accepted PY - 2019/6/27/entrez PY - 2019/6/27/pubmed PY - 2020/2/25/medline SP - e0218823 EP - e0218823 JF - PloS one JO - PLoS ONE VL - 14 IS - 6 N2 - Although environmental DNA (eDNA) is increasingly being used to survey for the presence of rare and/or invasive fishes in aquatic systems, the utility of this technique has been limited by a poor understanding of whether and how eDNA concentrations relate to fish density, especially in rivers. We conducted a field study to systematically test whether the eDNA released by a model invasive fish, Silver Carp (Hypophthalmichthys molitrix), was related to the density of this species in a large river. We quantified fish density throughout the 460 km long Illinois River using hydroacoustic surveys at 23 sites while concurrently collecting 192 surface water samples for eDNA analysis. We found that Silver Carp numerical density and biomass density were positively and non-linearly related to eDNA concentration and detection rate. Both eDNA concentration (copy number) and detection rate increased rapidly as Silver Carp density increased but plateaued at moderate densities. These relationships could prove useful for estimating Silver Carp relative abundance in newly invaded locations where population numbers are low to moderate. Future studies should explore the causes of this nonlinear relationship as it would ultimately benefit aquatic species monitoring and management programs. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/31242242/Nonlinear_relationship_between_Silver_Carp_density_and_their_eDNA_concentration_in_a_large_river_ L2 - http://dx.plos.org/10.1371/journal.pone.0218823 DB - PRIME DP - Unbound Medicine ER -