In I9U35 the creek was patrolled on May 31, June llx, sond July 

 2. The only evidence of escapement Tvas ttro sea lamprey nests 

 about one-half mile above the weir, found on May 3I. One was com- 

 pleted and contained developing eggs -which were promptly destroyed 

 by maceration of the nest. The other nest was only partially com- 

 pleted and contained no eggSo No adult lampreys were seen. Sub- 

 sequent visits indicated no further work on the incomplete nest 

 and no other nesting activity. 



In 19h9 the entire stream course was patrolled on June 10 and 

 June 28. No evidence of any escapement above the weir was dis- 

 covered . 



(3) Collection of data 



The Carp Creek sea lamprey weir was in effective operation 

 from April 21-August 1, 19h7, April 6-July 1$, 19hQ, and from 

 April 8-July 19, 19h9- Normally, the weir-trap, -vdiile in opera- 

 tion, was inspected and the fish and sea lampreys removed three 

 times each day. I scheduled these visits to be made as close as 

 possible to 8:00 A. M. , 5^00 P. M. and midni^t each day. All 

 specimens removed at each of these times were recorded as separate 

 collections . 



Of the entire sea lamprey run in 19k7 (I56I7 specimens), all 

 but 17 specimens were examined for sex, length, weight, stage of 

 maturity, and contents of the digestive tract. More detailed 

 examinations were made of 328 specimens. All sea lampreys of the 

 19ii8 run (2,939 specimens) except ei^t individvials were examined 

 for sex, length, stage of maturity, and contents of the digestive 

 tract. All specimens examined in both of these years vrere scru- 

 tinized for evidences of parasitism, pathological conditions, and 

 structural abnormalities. In 19U9, the sex of all sea lampreys 

 composing the run (2,763 specimens) was determined and length data 

 were obtained from all, or almost all, sea lampreys entering the 

 creek during alternate 2li-ho\ir periods (1,371 specimens). 



All individuals of other species taken in the trap were exam- 

 ined for evidence of sea lamprey attacks and these data were re- 

 corded . 



A maximum-minimum thermometer was maintained in the creek 

 just above the Tfeir from April 16-June 30, 19U7, April 6-July 1$, 

 19U8, and April 5- July 18, 19U9c Readings were made daily during 

 the morning visit and the water temperature at this time was noted 

 with a pocket thermometer in order to verify records on the fixed 

 thermometer. On June 30, 19li7, the maximum-minijii-um thermometer 

 was found to have been broken by some inquisitive visitor and 



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