F. Steven Elle

Reproductive demographics and factors that influence length at sexual maturity of Yellowstone cutthroat trout in Idaho

Abstract Length and age at sexual maturity for Yellowstone cutthroat trout Oncorhynchus clarki bouvieri vary across their historical range, but the factors that influence this variation are poorly understood. We collected 610 Yellowstone cutthroat trout from 11 populations across southeastern Idaho from streams and rivers with a variety of physical characteristics to determine length and age at sexual maturity and other reproductive demographics. The oldest Yellowstone cutthroat trout captured (age 10) was from the South Fork Snake River; most fish (90%) were between ages 2 and 4, and only three (<1%) were older than age 7 (all from the South Fork Snake River). Cutthroat trout from the South Fork Snake River did not mature until they were 300 mm long and 5 years of age, whereas cutthroat trout from other migratory and resident sites began maturing at ages 2–3 and lengths of 100–150 mm. Fish 100–250 mm long were much more likely to be mature if they were from sites with resident rather than migratory repro...

A Reward-Recovery Study to Estimate Tagged-Fish Reporting Rates by Idaho Anglers

Abstract From 2006 to 2009, we tagged and released 22,202 fish with T-bar anchor tags valued at US

Environmental Factors Related to the Distribution, Abundance, and Life History Characteristics of Mountain Whitefish in Idaho

0 to

Healing of Electroshock-Induced Hemorrhages in Hatchery Rainbow Trout

200 if returned. Our intent was to assess angler tag reporting rates in Idaho and to determine whether reporting rates declined over time or differed between species. A total of 4,643 tags were reported by anglers. Assuming a reporting rate of 100% for

Retention of Passive Integrated Transponder Tags in Stream-Dwelling Rainbow Trout

200 tags, weighted mean reporting rates were 54.2% for

A Long-Term Comparison of Yellowstone Cutthroat Trout Abundance and Size Structure in Their Historical Range in Idaho

0 tags, 69.7% for

Evaluation of Calcein as a Mass Mark for Rainbow Trout Raised in Outdoor Hatchery Raceways

10 tags, 91.7% for

Angler Exploitation of Redband Trout in Eight Idaho Desert Streams

50 tags, and 98.9% for

Life History Characteristics of the Wood River Sculpin, Cottus leiopomus (Cottidae), in Idaho

100 tags. By combining

Effects of Stocking Catchable-Sized Hatchery Rainbow Trout on Wild Rainbow Trout Abundance, Survival, Growth, and Recruitment

100 and