114 
W. G. O’CONNOR AND J. D. KOEHN 
Fig. 1. Map showing the study site at Bruces Creek. 
condition and contains abundant instream 
cover and wood debris. 
Beardsell (pers. comm.) described the bank 
vegetation at the site as mountain grey gum 
riparian damp sclerophyll forest (with no alien 
flora species) and the hillside vegetation as dry 
sclerophyll. The surrounding land is State 
Forest. 
METHODS 
G. olidus was collected from Bruces Creek on 11 
occasions between 15 August 1990 and 25 Octo¬ 
ber 1990 to examine spawning condition. This 
sampling period was selected as it coincided 
with previously reported spawning periods 
(Koehn & O’Connor 1990a). The length of 
stream fished for each sample ranged from 15 m 
to 60 m, and the number of fish collected in each 
sample varied from 22 to 62. Samples were 
taken over a 380 m stretch of stream, with only 
one section being sampled on each occasion. On 
11 July 1991 an additional 24 ripe female fish 
were collected to determine egg numbers. 
An estimate of the proportion of fish collected 
from pools and riffles was made during these 
