Excerpt from Observations on the Ecology of Colorado Squawfish (Ptychocheilus Lucius) In the Yampa River, Colorado, 1982Twelve Colorado squawfish were surgically implanted with radio transmitters on the Upper Yampa River between river kilometer (km) 86 and 172 in March and April, 1982. Five fish exhibited highly mobile migrations of 200-350 km by migrating from the Upper Yampa downstream to spawning areas in the lower 32 km of Yampa Canyon, with at least four returning to the Upper Yampa near points of original capture. The major movement into Yampa Canyon occurred in late June and early July. Three fish of the sample population did not migrate. Radio contact was lost with three other fish in June and July.A chute channel with rubble gravel substrate at river km was the only site at which squawfish were observed by radiotelemetry to exhibit spawning behavior. Aggregations of ripe fish captured with nets at several locations throughout the lower 32 km of Yampa Canyon suggest spawning at other sites. The river within the spawning area is characterized by large meandering bends, unique pool-riffle-pool sequences, and large braided rubble (cobble) bars.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.