McConaughy Fingerling Rainbows Stocked
Wednesday, August 11th, 2010Arkansas Game and Fish Commission biologists continue to evaluate some different strains of rainbows to complement their current stocking strategy. Recently, some McConaughy rainbow fingerlings were stocked in both the Little Red and the White Rivers. According to trout biologist Jeff Williams, “The fingerlings averaged about 3.5 inches in length and were marked with an adipose fin clip.”
The McConaughy rainbows (pronounced mih-KAH-nuh-hay) originate from the North Plate River Valley above Lake McConaughy in western Nebraska. There the rainbows make a natural spawning run out of the lake into the groundwater tributary streams in the winter and reproduce. The smolts then migrate into the lake for a period of 2-3 years before returning to the streams to spawn as 3-4 pound rainbows.
Williams says the trout biologists here have been investigating using other strains of rainbows in the White River tailwaters since data suggests the typical stocked rainbow is not getting the growth rate desired in the catch and release areas which have recently been studied. Williams thinks a “wilder” strain such as the McConaughy bows might be better foragers in the tailwaters. In 2008, AGFC stocked a small number of McConaughy’s in the Little Red. The high water that year foiled attempts to sample and evaluate those efforts. A few were recaptured and those had seemed to grow extremely well.
This summer AGFC stocked about 12,500 fingerlings in the Bull Shoals Catch & Release area and an equal amount at Rim Shoals. These were stocked the end of July. About 25,000 fingerlings were stocked in the Little Red about the same time as well.
An initial sample was conducted last week and monthly samples in the coming year will be taken to monitor growth and survival. The first sample at Bull Shoals dam found a pretty good number of the fingerlings, which were concentrated around the cedar trees that the AGFC habitat program had put in last year. At Rim Shoals far fewer fingerlings were found.
AGFC has received a verbal agreement from the Norfork National Fish hatchery to raise some McConaughy’s for the Norfork Tailwater, and Williams anticipates those to be ready within the year.
© 2010, Scott Branyan
