have remained there. No systematic search was 

 made for transferred smallmouths in other parts of 

 the stream, although several were collected in- 

 cidentally during other investigations. 



Experiment A 



The objective of this experiment was to test 

 the ability of smallmouth bass to return to a home 

 pool after having been moved upstream. The pool 

 in which a fish was first taken was assumed to be 

 the home pool for that fish. Each time a fish was 

 retaken in its home pool it was to be transferred 

 again to the upstream pool to which it had 

 been moved. 



On September 28, 1950, five bass were taken 

 from pool VI, 8, tagged, transported overland by 

 truck, and released upstream in pool IX, 3, fig. 1, 

 a distance of 0.66 mile by water. There were 14 

 shallow riffles and 13 pools between pool VI, 8, 

 and pool IX, 3. The returns from this first transfer 

 are shown in fig. 3. Since most of these fish, plus 

 two others not taken in the first collection, were 

 transferred several times, making their movements 

 difficult to follow, a brief case history is given for 

 each fish. 



Bass No. 145 (total length 10.9 inches) was 

 transferred upstream September 28 and recovered 1 

 week later, October 6, in its home pool. At this 

 time, it was again moved upstream. On October 20, 

 2 weeks after the second transfer, it was collected 

 0.14 mile upstream from the point of release. 



Bass No. 147 (total length 11.9 inches) was 

 first transferred upstream September 28; it was re- 

 taken in its home pool 1 week later, October 6, and 

 was again transferred upstream. One week later, 

 October 13, it was again recaptured in its home 

 pool and was again transferred upstream. It was 

 not found in the home pool on October 20 but was 

 there several months later, March 6, 1951. The 

 movements of this fish are shown by a diagram, 

 fig. 4. 



Bass No. 143 (total length 13.3 inches) was 

 first transferred upstream on September 28. It had 

 returned to its home pool by October 13 and was 

 again transferred. One week later, October 20, it 

 was still at the point of release upstream from its 

 home pool. Although no fish bearing tag No. 143 

 was retaken after this date, an untagged fish of the 

 same size, and with the same clipped-fin mark, was 

 caught halfway between these two pools on May 



16, 1951, and was retaken in the home pool of No. 

 143 on August 10, September 17, and October 



17. 1951. 



Bass No. 144 (total length 14.6 inches) was 

 moved upstream September 28. The following week 

 it was not found in its home pool, but on October 

 13 it was collected 0.40 mile downstream from its 

 home pool and 1.06 miles below the place of re- 

 lease 2 weeks before. It was then transported 

 along with other fish (described in Experiment B) 

 0.81 mile farther downstream. One week later, 

 October 20, it was found in its original home pool, 

 having returned 1.21 miles upstream. On this date 

 it was again transferred to the upstream pool. Al- 

 though it was not recaotured in the home pool on 

 November 14, it was retaken there the next time the 

 pool was examined, March 6, 1951. 



The remarkable movements of this fish are 

 shown in fig. 3. Why this fish overshot its home 

 pool on its first downstream movement is un- 

 explainable, for it returned rapidly upstream to its 

 home pool when carried farther downstream. 



Bass No. 146 (total length 11.7 inches) was not 

 recaptured in pool VI, 8, the pool from which it was 

 taken for transfer upstream on September 28, nor 

 was it found later in the upstream pool in which it 

 was released. The fin mark of this fish when it was 

 taken on September 28 indicated that it had been 

 marked previously in another section of this stream. 

 It may have been only a temporary resident of pool 

 VI, 8; possibly it should not have been expected to 

 return there after having been moved. 



Bass No. 141 (total length 10.7 inches) was 

 transferred upstream October 6 and retaken after 1 

 week, October 13, in the home pool. Then, after 

 its second transfer, it was recaptured at the up- 

 stream point of release on October 20 and March 6, 

 1951, apparently having overwintered in that pool. 



Bass No. 199 (total length 10.2 inches) was 

 moved upstream on October 6 and was not retaken 

 either in the pool in which it was captured nor in 

 the pool in which it was released. 



Of the seven fish moved 0.66 mile upstream, ap- 

 parently two never returned to the pool in which they 

 were taken, two returned once but not a second 

 time, and three returned every time moved (one, 

 three times; two, two times). Thirteen transfers 

 were made, nine of which were followed by homing 

 responses. 



Experiment B 



This experiment was planned to test the ability 

 of smallmouth bass to return to a home pool after 

 having been transferred downstream. Seven small- 

 mouths (11.4, 11.2, 10.5, 11.8, 13.5, 11.3, and 7.5 

 inches total length) were taken from pool V, 11, 

 figs. 2 and 3, on October 13, 1950, and transferred 



