236 BULLETIN OF THE BUREAU OF FISHERIES. 



Table VIII. — Records op Perca flavescens Taken in Douglas Laxe. 



No. 



I-7I 



»J-77 



78 



79 



80-221 



222 

 223 

 224 

 225 

 226 

 227 

 22S 

 329 

 230 

 231 

 232 

 233 

 234 

 23 s 

 236 

 237 

 »38 

 239 

 340 

 J4I 



343 

 343 

 344 

 245 

 346-66 

 267-8 

 269 

 370 

 371 

 372 

 373a 

 373b 

 373 

 374 

 375 

 376 



Weight. 



Ounces. 



"0.5 



0.75 

 3 



I-S 

 "S 



5- 5 



S 



S 



5 



4 



3 



5 



4 



4 



4 



6 



7 



4-5 



4-5 



Length. 



Inches. 

 '■4.4 



<>4.6 



6 



"4 



8.4 



7 



7.6 

 7-6 

 8.4 



7.6 

 8.4 



5.8 

 5.8 

 5-1 



4.2s 

 4.6 



-5.5 



14 males, 57 le- 

 males. 



All females 



Female 



....do 



22 males, 120 fe- 

 males. 



Female 



.do. 



do. 



do. 

 .do. 

 .do. 

 .do. 



do. 

 .do. 

 .do. 

 .do. 

 .do. 

 .do. 



do. 



Female. 



do.. 



do.. 



do.. 



....do.. 



Female . 

 ...do.. 

 ...do.. 

 ....do.. 



Water 

 depth. 



Feet. 



S-5 



s-s 



5-5 

 S-S 

 5-5 



26 

 41 

 41 

 41 

 41 

 41 

 43 

 43 

 43 

 43 



35-40 

 35-40 

 35-40 

 35-40 

 26-30 

 26-30 

 35-43 

 35-43 

 35-43 

 35-43 



Apparatus. 



Fyke 



.do. 

 .do. 

 .do. 

 .do. 



GUI.... 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



Angle. . 



....do. 



....do. 



....do. 



....do. 



do. 

 .do. 

 .do. 

 .do. 

 .do. 



GUI. 



.do. 

 .do. 



.do. 

 .do. 

 .do. 

 .do. 

 .do. 

 do. 



Stomach contents. 



2 insects, i copepod, in 6 



fish examined. 



Empty 



Small perch 



Empty 



Of 20, 14 empty. 6 with 



insects. 



Empty 



do 



do 



do 



do 



do 



do 



do 



do 



do 



Cambarus virilis 



Empty 



do 



do 



Not examined 



Empty 



do 



Small crayfish 



Empty 



I crayfish, i dragon fly, 



nymph. 



Small fish 



Empty 



do 



Piece earthworm 



I with fish, 2 with insects. . 

 r empty, i with insects. . . . 



Fish muscle 



Not recognizable 



do 



Empty 



do 



...do 



do 



....do 



I 2-inch crayfish 



Empty 



Local- 

 ity in 

 Fig. I. 



Aug. 6,1913 



Aug. 7,1912 

 Aug. 8,1912 



Do. 



Do. 



Aug. 16, 1912 

 Aug. 17,1912 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Aug. 18,1912 



Do. 

 Aug. 20, 1912 



Do. 



Do. 



Do. 

 Aug. 3.1913 

 Sept. 5,1911 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Sept. 9,1911 



Do. 

 Sept. 14,1911 



Do. 



Do. 

 Sept. IS, 1911 

 Sept. 13, 1911 



Do. 

 Sept. 16, 1911 



Do. 



Do. 



Do. 



« Average. 



Perch range in midsummer from a depth of a few inches to about 45 feet. They 

 have not been found below the thermocUne even in September. They occur in all parts 

 of the lake. 



Perch of about 2 inches long are common on the shoals in misdummer, but have not 

 been found elsewhere. In our collections made with the hook from the aquatic vegeta- 

 tion there are no perch more than 6 inches long (no. 237 to 266, table viii). Larger perch 

 do not appear to occur there, else we should have taken them among the 29 fish from the 

 vegetation. For the 221 perch taken in the fyke net in shallow water we have recorded 

 for most of them only the average length in each lot. There is one fish slightly in 

 excess of 7 inches. On the other hand, in deep water where we have used a gill net of 

 I -inch square mesh we have taken no perch under 7 inches and many of 8 inches and 

 more (no. 223 to 235 and no. 267 to 276). As perch of 4 or 5 inches have a depth of 

 an inch or more, a net of inch mesh should have taken them if they were present. 

 The average of the fish taken with the hook in vegetation is 4.6 inches (no. 237 to 245), 

 while the average of the 25 taken in the gill net is 7.7 inches. It appears, then, that in 



