నైరూప్య

A SURVEY OF BROWN TROUT REDD LOCATIONS IN CROW CREEK, LAWRENCE COUNTY, SOUTH DAKOTA, USA

Tristan Blain, Greg Simpson and Michael E. Barnes

This study surveyed brown trout (Salmo trutta) redd locations and redd construction timing in 2017 in a 4.85 km reach of Crow Creek, a prairie stream encompassed by both privately and publically-owned land adjacent to the Black Hills of South Dakota, USA. The first redd was observed on October 17, with the final redd sighting on November 21. Peak redd construction occurred on November 14, when 13 newly-constructed redds were observed. Only 25 redds were recorded during the eight week survey period. Overall, 84% of redds were observed on private land (5.60 redds/km), while only 16% (3.64 redds/km) were observed on public land. This is the first study to document redd locations and spawning dates for brown trout in a prairie stream in South Dakota.