MOVEMENT OF THREE SPECIES OF FISHES 



539 



-•1 



E. C. GASTON 

 STEAM PLANT 



12 



DATE 



6- 8-74 

 6- 9-74 

 6-11-74 



SCALE 



0.4 0.8 km 

 _J I 



Fig. 3 Plot of location of channel catfish no. 2, June 8 to 11, 1974. 



Dashed line connecting positions ( j) indicates continuous 



tracking. 



sity, implanted with a calibrated thermistor-type transmitter, trans- 

 ported, and released June 8, 1974, into a large cove about 900 m 

 below the steam plant. The position plots for this fish (Fig. 3) 

 represent only 3 days of tracking although many unsuccessful 

 searches were made later. The fish moved considerably during the 

 period of tracking. Positions 1 to 11 were recorded during a 10-hr 

 period on the day of release, and 12 to 17 were recorded during a 

 1-hr tracking period the next morning. The greatest movement was 

 recorded on June 11 (positions 18 to 30), when the fish moved 

 directly past the generating plant and continued more than 3 km 

 upstream, going beyond the study area. 



During the monitoring of channel catfish no. 2, periodic surface 

 temperatures and profiles were taken for comparison with the 

 transmitted temperature. The surface temperatures at the fish's 

 position were comparable with the general surf ace- temperature- 

 distribution patterns depicted in Fig. 1. During the tracking days of 

 June 9 and 11, the fish maintained his position in water of 22 to 



