. Fish populations of the wild & scenic Missouri River, Montana . Fishing surveys; Wild and scenic rivers; Fishes; Fishes. Figure 13. Photograph of a paddlefish in the field of the negative electrode at the side of the boat. Twelve electrofishing survey runs were made during a n9-day period from April 6 to August 2, 1977 (Table 13). The most paddlefish observed in a survey run was 63 on May 19. Nearly all paddlefish counted during the 1977 migration period were observed in the lower 37 km of the Missouri River between Robinson Bridge and Fort Peck Reservoir (Figure 14). The farthest docume
. Fish populations of the wild & scenic Missouri River, Montana . Fishing surveys; Wild and scenic rivers; Fishes; Fishes. Figure 13. Photograph of a paddlefish in the field of the negative electrode at the side of the boat. Twelve electrofishing survey runs were made during a n9-day period from April 6 to August 2, 1977 (Table 13). The most paddlefish observed in a survey run was 63 on May 19. Nearly all paddlefish counted during the 1977 migration period were observed in the lower 37 km of the Missouri River between Robinson Bridge and Fort Peck Reservoir (Figure 14). The farthest documented upstream movement was one paddlefish observed 42 km upstream from Fort Peck Reservoir on June 18. Flow was well below normal in the Missouri River during the 1977 migration period. Peak flow was about 221 m^/sec (7800 cfs) from early to mid-May at the Virgelle gage station. Because of the low flows, the paddlefish migration was severely reduced. A relatively small number of fish was involved in the run, and the extent of their upstream movements was minimal. Some paddlefish remained in the lower 37 km of the Missouri River during July, August, and September (Figure 15). These fish were probably waiting for sufficient flow to make an extended migration, but this flow was not achieved in 1977. Since there is no known suitable spawning substrate in the lower 37 km of the river, it is likely that spawning success in 1977 was very poor. 60. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Berg, Rodney K; Montana. Dept. of Fish, Wildlife, and Parks. [Helena] : Montana Dept. of Fish, Wildlife & Parks
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Keywords: ., book, bookcentury1900, bookcollectionamericana, booksubjectfishes
