meshes per inch. The other seine was 40 m (130 ft) 

 long and 3 m high; the center 9 m of the web had four 

 meshes per inch and the balance had two. 



Pelagic and littoral areas were also sampled with 

 floating box traps in 1962 and 1963. The box portion of 

 the trap was about 1.2 m (4 ft) square in cross section 

 by 1 .8 m (6 ft) long; wings extended 4.5 m from the box 

 and the lead was 15 m long. The box and wings had 

 four meshes per inch and the lead had two. To sepa- 

 rate fish entering from each side, the box had a 

 lengthwise partition connected to the lead. 



A small otter trawl (gulf-type shrimp try-net) was 

 used sporadically throughout the system. The wings 

 had a spread of about 9 m and were about 1 m high. 

 The net was cotton and had two meshes per inch in the 

 wings and body and four meshes per inch in the tail. 



Gill nets were also fished sporadically. The sizes 

 varied from a 1.3-cm ('/i-inch) bar to a 10-cm (4-inch) 

 bar. Small nets were nylon and large ones were cotton 

 or linen. 



Rivers and streams were sampled with small and 

 large fyke nets. The small nets were 1 m (3 ft) square 

 with 1.2-m (4-ft) wings and were made of nylon web 

 with eight meshes per inch. The large nets were 1.2 m 

 square or 1.2 m wide by 1.5 m high and had 1.8-m 

 wings. The large nets were nylon web with two 

 meshes per inch in the wings and body and four 

 meshes per inch in the tail and cod end. The cod end of 

 the net was often replaced with a 20.2-cm (8-inch) 



diameter flexible hose connected to a floating livebox. 

 With this arrangement several thousand juveniles 

 could be collected without many being killed. 



Angling with sport fishing gear was used to supple- 

 ment other sampling methods. 



Measurements of Fish 



Sockeye salmon juveniles and associated species 

 were usually measured for fork length (tip of snout to 

 fork of tail) to the nearest millimeter and weighed 

 (drained weight) to the nearest higher gram. The fish 

 were usually preserved in 10% Formalin for at least 

 48 h, but less than 1 wk, before being measured or 

 weighed. Sockeye salmon smolts and recently 

 emerged fry were measured alive, but anesthetized; 

 the fry were measured for total length (tip of snout to 

 tip of tail in normal extension). 



The preserved juvenile sockeye salmon were also 

 routinely weighed by 3-mm size groups on a triple 

 beam balance. Length and weight data were combined 

 to yield "condition factors." These condition factors 

 were somewhat variable but usually well above 1.0000 

 for all fish from all lakes. No utility was seen in the 

 condition data and the weight data will not be consid- 

 ered in this report. 



AMERICAN CREEK 



Figure 2. — Coville Lake, Naknek River system, showing units where juvenile sockeye salmon were sampled with tow nets in 1963 



(lower) and 1964 (upper). 



