Assessing grass carp (Ctenopharyngodon idella) occupancy and detection probability within Lake Erie from environmental DNA Author Bopp, Justin Quantitative Fisheries Center, 375 Wilson Rd., Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI 48823, USA Author Nathan, Lucas R. Michigan Department of Natural Resources, Fisheries Division, 525 West Allegan St., Lansing, MI 48933, USA Author Robinson, John D. Department of Fisheries and Wildlife, 480 Wilson Rd., Michigan State University, East Lansing, MI 48823, USA Author Kanefsky, Jeanette Department of Fisheries and Wildlife, 480 Wilson Rd., Michigan State University, East Lansing, MI 48823, USA Author Scribner, Kim T. Department of Fisheries and Wildlife, 480 Wilson Rd., Michigan State University, East Lansing, MI 48823, USA & Department of Integrative Biology, Michigan State University, East Lansing, MI 48823, USA Author Herbst, Seth Michigan Department of Natural Resources, Fisheries Division, 525 West Allegan St., Lansing, MI 48933, USA Author Robinson, Kelly F. U. S. Geological Survey, Georgia Cooperative Fish and Wildlife Research Unit, Warnell School of Forestry and Natural Resources, University of Georgia, 180 E. Green St., Athens, GA 30602, USA & Quantitative Fisheries Center, 375 Wilson Rd., Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI 48823, USA text Management of Biological Invasions 2024 2024-02-23 15 1 51 72 http://dx.doi.org/10.3391/mbi.2024.15.1.04 journal article 10.3391/mbi.2024.15.1.04 1989-8649 11976725

Table 4. Percentage of positive eDNA replicate detections in each month and site in 2018 and 2019 in western Lake Erie (based on at least one positive detection on at least one marker and one replicate). All markers (GCTM10, GCTM 22, GCTM32) were used to calculate these proportions. Samples were collected monthly from June to November for each site. The number of telemetered grass carp detected within 7 days before sampling for eDNA is denoted in parentheses. Acoustic telemetry receivers in MB in 2018 were not available. DR = Detroit River, HP = Hot Ponds, and MB = Maumee Bay. NA denotes when acoustic telemetry receivers were not in operation.

Year
Site	2018						2019
	June	July	Aug	Sept	Oct	Nov	May	June	July	August	Oct	Nov
DR	0.0%	2.3%	2.3%	0.0%	0.0%	0.0%	4.5%	10.6	14.1	17.4%	14.1%	2.2%
	(1)	(1)	(2)	(1)	(2)	(0)	(1)	% (1)	% (1)	(2)	(2)	(0)
HP	0.0%	0.1%	4.1%	2.2%	15.8%	0.0%	9.0%	1.5%	34.8	1.5%	15.8%	22.7%
	(1)	(1)	(2)	(2)	(3)	(NA)	(2)	(2)	% (2)	(3)	(2)	(2)
MB	12.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	6.1%	37.1	8.3%	8.3%	0.0%
	(NA)	(NA)	(NA)	(NA)	(NA)	(NA)	(0)	(0)	% (0)	(0)	(0)	(0)