Table 2. — Number and weight (in pounds) of each of the species of suckers collected, I'^SO, in each 

 of the eight divisions of Jordan Creek, and the total number and total weight of each species collected in 

 all divisions combined. 



not abundant in the same pools, indicating a 

 difference in habitat preferences. Like the white 

 sucker, the hog sucker showed a tendency to move 

 ahead of the shocker. Occasionally it was able to 

 dash through the electrical field without becoming 

 completely incapacitated. When stunned, it would 

 sink to the bottom rapidly and for this reason was 

 often difficult to collect. 



Creek Chubsucker. -- Fish of this species 

 appeared in only 11 collections in the study area. 

 Upstream above the study area, they were more 

 abundant; 2.5 times as many specimens were taken 

 in two short upstream sample stations (each 200 feet 

 long) than were collected in the entire study area. 



Spotted Sucker. "Only one specimen of this 

 species was collected. It was taken in Division 3 

 after a heavy rain in October and presumably had 

 moved up the stream from the Salt Fork River, where 

 the species was rather abundant. 



Golden Redhorse. -- This species was rep- 

 resented in 79 per cent of the collections, but 95 

 per cent of the specimens were taken from the soft- 

 bottomed, slow-flowing waters in the open area. 

 They were usually in small schools of four to six 

 individuals. All but 27 of the redhorse collected 

 were of the 1950 brood (young-of-the-year) and 

 only 4 of the 27 were unquestionably of adult size. 



Minnow Fa 



mi ly 



The minnows were the dominant fish family in 

 the Jordan Creek study area, comprising 75 per 

 cent of the total number and 38 per cent of the 



total weight of all fish collected. There was a 

 marked increase in theit numbers from the wooded 

 to the open area, table 8; the wooded area yielded 

 30 per cent, the open area 70 per cent, of the total 

 number collected. The increase in weight was not 

 so evident, indicating that the minnows from the 

 wooded area were larger in average size than those 

 from the upper, open area. In each division the 

 minnows were more numerous than the fish of all 

 other families combined, and only in Division 4 

 was their weight exceeded by the fish of any other 

 one family--by the suckers and the sunfishes, table 

 9. In this division the stoneroller, which comprised 

 39 per cent of the weight of all minnows collected, 

 was at its lowest level of abundance, table 3. Of 

 the 13 species of minnows present in the study 

 section, 3 species--the stoneroller, the homyhead 

 chub, and the bluntnose minnow--made up 73 per 

 cent of the total weight of this family. 



Corp.. -One immature specimen taken in 

 Division 4 was the only representative of this 

 species in our collections. 



Creek Chub. -- Individuals of this species were 

 taken in all but one collection. Their numbers 

 increased progressively upstream, whereas their 

 average size decreased. 



Hornyhead Chub. -- This species was the second 

 most abundant minnow by weight and was rep- 

 resented in every collection. The larger individuals 

 were found at the upper ends of fairly deep pools, 

 usually in constricted riffles having currents of 

 moderate velocity. 



Rosyface Shiner. -- Although this minnow was 



