River Shiner

Diet and feeding

The FishTraits compilation records these diet categories for this species: algae or phytoplankton; aquatic or other vascular plants; detritus or unidentified plant material; invertebrates or larval fish. These are broad categories, not a claim that every individual consumes every example in a category.

Reported feeding positions include bottom feeding and surface or water-column feeding. The compilation combines published observations; diets can vary with age, locality, and available food.

Habitat preferences

Reported habitat associations include medium to large rivers, streams and small rivers.

The source records associations with sand, gravel, bedrock. An association indicates reported use, rather than an exclusive requirement.

Reproduction and parental care

The compilation reports a representative maturity age of 2 years. Its maturity field summarizes mean, median, or modal estimates, usually for females; male estimates can be used when female data are unavailable. It is not a fixed age at which every fish first breeds.

Recorded spawning months are Jun, Jul, Aug for the source’s reporting region (WI). This is a regional calendar, not a range-wide schedule.

The reproductive-guild classification includes spawning on open substrates without guarding the brood.

Size and recorded longevity

FishTraits reports a maximum total length of 13 centimetres. Some entries use an estimated asymptotic length; this value should not be treated as a certified record catch.

Recorded longevity in the compilation is 3.5 years. Wild observations were preferred, but captive records were accepted where wild records were unavailable, and unspecified records were assumed wild. The value is not a guaranteed wild lifespan or an aquarium life expectancy.

Native range

Hudson Bay basin from Manitoba to Alberta (absent in eastern Saskatchewan) in Canada, and south through Red River, Minnesota and North Dakota; Mississippi River basin from Wisconsin and Minnesota south to Gulf; in the United States occurs as far east as West Virginia and as far west as eastern Colorado (Page and Burr 1991).

Introduction history

One of the collectors, G. A. Moore, thought that the Bricken Spring specimen represented a bait introduction, based on the fact that it was taken on the premises of Thomas Bricken, a bait dealer, who obtained his fish from the Arkansas and Red river drainages (Hubbs and Bonham 1951).