LATERAL STREAM 

 RECOVERIES 

 ALL LAKES COMBINED 

 12 



AMERICAN CREEK 

 COVILLE LAKE- 

 RECOVERIES 

 n=360 



HAROSCRABBLE 

 CREEK GROSVENOR 

 LAKE-RECOVERIES 

 n=l22 



NAKNEK RIVER 

 ESCAPEMENT 



15 



Figure 5. — Naknek River escapement and weighted 

 spawning ground tag recovery distributions by day of 

 tagging, 1962 (lateral streams, American Creek, and 

 Hardscrabble Creek) . 



40- 

 30- 

 20- 

 10- 

 — 



O - 



40 



30 



20 



« 10 

 o 



u- 

 o 



z 40 



uj 



u 



0=30 

 -l 



20 



10 







40 



30 



20 



10 



^-•v ^^ 



GROSVENOR RIVER 



-RECOVERIES 



n=32 



BROOKS RIVER 

 NAKNEK LAKE 

 RECOVERIES 

 n=249 



NAKNEK RIVER 

 OUTLET OF 

 NAKNEK LAKE- 

 RECOVERIES 



NAKNEK RIVER 

 ESCAPEMENT 



Figure 6. — Naknek River escapement and weighted 

 spawning ground tag recovery distributions by day of 

 tagging, 1962 (Naknek River, Brooks River, and 

 Grosvenor River). 



the outlet of Naknek Lake (figs. 4 and 6), which 

 had a small number of recoveries (table 2). 

 Spawning areas such as American Creek and 

 Brooks River (figs. 5 and 6), which had a sub- 

 stantial number of recoveries, tend to conform 

 more closely to the daily escapement pattern. 



The tag recovery pattern for American Creek 

 (fig. 5) is taken to be representative of the entire 

 escapement into Coville Lake. American Creek, 

 one of the most important spawning areas in the 

 Naknek system, usually receives practically the 

 entire spawning escapement entering Coville Lake. 

 The escapement to the few small lateral streams 

 of Coville Lake in 1962 was only a fraction of that 

 which spawned in American Creek. Only four 

 tags were recovered from these streams (table 2), 

 and they do not change the pattern illustrated by 

 the American Creek recoveries. 



The small lateral streams of all lakes had too 

 few tag recoveries for comparison with the escape- 

 ment on an individual basis; however, the few tags 

 obtained from individual lateral streams were from 

 tags applied throughout the run. When these re- 

 coveries are grouped by lakes and weighted in the 

 manner previously described, they provide a pat- 

 tern quite similar to that of the escapement (fig. 

 5). The indication is that the escapement to the 

 small lateral streams is also derived from all parts 

 of the run and generally in proportion to the size 

 of the daily escapement. 



Two areas, however, seem to show some degree 

 of segregation of their spawning populations. The 

 pattern of recoveries for Brooks Lake shows a 

 greater proportion of tags from the early portion 

 of the run (i.e., before July 2) than the pattern 

 for the other lakes (fig. 7). This is evident not 



470 



U.S. FISH AND WILDLIFE SERVICE 



