P00LIX,3 



POOL IX,6 



LEGEND 



TRANSPORTATION OF TAGGED FISH BY TRUCK 



MOVEMENT OF TAGGED FISH WITHIN STREAM 



COLLECTING STATION 

 BASS POOL 



Fig. 5. - Section of Jordan Creek, showing the successive overland transfers and subsequent move- 

 ments of a smallmouth bass (No. 14205) used in Experiment C. 



Experiment C 



Smallmouth bass were moved both downstream 

 and upstream in this experiment to test further 

 the ability of these fish to return to their home 

 pools in either direction. 



The experiment was started September 27, 

 when one 7-inch smallmouth was taken from pool 

 IX, 6, and moved 0.14 mile downstream to pool 

 IX, 3, figs. 1 and 3. Between these two pools 

 were three riffles and two long pools. Three weeks 

 later, October 20, this bass was recaptured in its 

 borne pool, and, with five others (13.9, 7.2, 9.0, 

 11.8, and 7.0 inches in length) found there, was 

 moved to the downstream pool, IX, 3. On October 

 27, 1 week later, only one of these bass, No. 

 14205, had returned to pool IX, 6, fig. 5. It was 

 transferred with three others (9.0, 6.9, and 6.8 

 inches in length) 0.14 mile upstream and released 

 in pool IX, 11. Five shallow riffles and four 

 pools, one of these pooly especially suitable 

 for bass, separated tin: two points. Two of the 

 four bass, including No. 14205, were recaptured in 

 the home pool, IX, 6, on November 14. The 

 following spring. May 18, 1951, two more of the 

 first downstream transfers were retaken; one' was 

 in its home pool and one was halfway between its 

 home pool and the point of release. 



Following is a summary of Experiment C: 



One smallmouth was moved downstream twice 

 and it returned once. 



One was moved downstream once and it 



returned once. 

 One, No. 14205, was moved downstream 

 once and it returned once, and then was 

 moved upstream once and it returned 

 once, fig. 5. 

 One was moved upstream once and it re- 

 turned once. 

 Three were moved downstream and they did 



not return. 

 Two were moved upstream and they did not 

 return. 

 Four of the five fish that did not return had not 

 been taken previously in the section of the stream 

 in which pool IX, 6, was located; two of them had 

 never been marked and two had been marked 

 farther upstream. These four were under 9.1 inches 

 in total length. Because the bass in this exper- 

 iment were particularly slow in returning after 

 the downstream transfer, probably because of the 

 onset of winter conditions, there was opportunity 

 to move only one fish in both directions, down- 

 stream and then upstream. This fish displayed a 

 perfect response, returning to its home pool prompt- 

 ly from both directions, fig. 5. 



Additional Evidence on Homing 



Without becoming much concerned with another 

 species, it is of interest to compare a few 





