Northern Pearl Dace Margariscus nachtriebi
This species was found at 1 bioassessment site, 0 rapid fish bioassessment sites, 0 fisheries assessment sites, and 0 fisheries presence-only assessment sites. In total, it was collected at 1 distinct sites, or 0.1% of the 1522 total sites monitored by the bioassessment program. It is the 133rd most commonly collected species.
The Northern Pearl Dace was collected in 2 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 2 individual Northern Pearl Dace specimens, ranking it the #138 most collected fish.
Pearl Dace have an elongated body and are nearly cylindrical in cross section. The terminal mouth is nearly horizontal with the upper jaw separated from the snout by a groove. A small barbel is present in the groove of the upper jaw, but is occasionally lacking. Hooked pharyngeal teeth are arranged in a formula of 2, 5-4, 2, but this count is variable. The lateral line is usually complete with 62 to 78 scales. Coloration is dark olive on the back with lighter sides, and the belly is white. Many of the scale pockets on the sides are darkened, giving a mottled look, and a lateral band is distinct on the young, but fades in adults. Nuptial males have a rosy color below the lateral band, and females may also show some color during spawning. Dorsal, anal, and pelvic fins have 8 rays, while the pectoral fins have 15 or 16 rays.
HUC12 watersheds where this species has been found