Freckled Madtom Noturus nocturnus
This species was found at 7 bioassessment sites, 0 rapid fish bioassessment sites, 0 fisheries assessment sites, and 0 fisheries presence-only assessment sites. In total, it was collected at 7 distinct sites, or 0.5% of the 1522 total sites monitored by the bioassessment program. It is the 112th most commonly collected species.
The Freckled Madtom was collected in 13 bioassessment sampling sessions and 0 fisheries assessment sessions. It was present in 0 rapid bioassessment sessions and 0 presence-only sessions.
The biological assessment program has collected a total of 22 individual Freckled Madtom specimens, ranking it the #115 most collected fish.
The color varies from yellow to dark brown with dark freckles on the lower lip and chin. The upper jaw projects beyond the lower jaw, and the pectoral spines lack anterior serrae. There are 15 to 20, usually no more than 18 anal rays. The caudal fin is usually darker than the other fins. Posterior corners of the premaxillary tooth band are rounded or sometimes obtusely angled. Freckled Madtoms are rarely more than 4-inches long.
Photo Credit Mason Deja. Collected October 19, 2021 from Clear Creek near Iowa City.
Photo Credit Mason Deja. Collected October 19, 2021 from Clear Creek near Iowa City.
Photo Credit Mason Deja. Collected October 19, 2021 from Clear Creek near Iowa City.
HUC12 watersheds where this species has been found