104 CORMORANTS AND THE GIPPSLAND LAKES FISHERY 
3. Black Bream Spams australis (GUntli.) 
River Garfish Hyporhamphus regularis (Giinth.) 
Ludrick Girella tricuspidata (Quoy and Gaim.). 
Although details of the spawning of any of the fishes 
mentioned in this paper are unknown, there is considerable 
evidence indicating that the three species of this group are 
wholly dependent upon the lakes and other similar inlets from 
the egg stage to maturity. This is a very important point, 
for it will be apparent that any marked alteration in the 
natural condition of the lakes will seriously atfect these 
fishes. The graphs show that the diminution in the supplies 
River Garfish and Ludrick marketed annually from the Gippsland Lakes 
1911-1937. 
of this group is mainly responsible for the reduced total 
annual quantity, and moreover, the choicest fish of the lakes, 
the Black Bream, has been most affected in this respect. 
The Bream occurs in the diet of the Large Black Cormorant 
