116 
Jerry W. Nagel 
5 
5 
10 
_ FEMALES MARCH 1977 _ 
FEMALES MARCH 1978 
MALES 
30 40 50 60 70 80 
TOTAL LEHGTH, MM 
Fig. 1. Frequency distributions of total lengths of all C. bairdi collected from 
Straight Creek, March 1977 and 1978. Each bar represents a 2-mm interval. Solid 
bars = immatures: open bars = breeding adults. 
to the nearest 0.1 mg. Measurements of follicle diameter, egg diameter, 
and TL of hatchlings were made with an ocular micrometer in a dis- 
secting microscope. 
Mark and recapture population estimates were made in April and 
May 1 979 in a 195 m section of Straight Creek. This included a 100 m sec- 
tion (#1 ) with 100% canopy cover and a 95 m section (^2) with 0% canopy 
cover. All specimens less than 50 mm TL were marked with a left pelvic 
clip while specimens over 50 mm TL were tagged with a fingerling tag 
(Floy Tag and Mfg,, Inc., Seattle, Washington 98105) fastened with vinyl 
thread under the anterior part of the dorsal fin. Some tag loss was noted, 
but the duration of the study was short enough that tagging wounds were 
