362 BULLETIN OF THE BUREAU OF FISHERIES. 
TABLE 31.—PERCH INFECTED BY CERTAIN PARASITES IN LAKE MENDOTA, 1915-16, SHOWN By MONTHS. 
[Numbers in parentheses indicate percentage infected of total catch for a single month.] 
Perch. Parasites. 
Tape- Adult Larval 
Month. Num- Num- Nema- | Trema- | worn tape- proteo- 
ber ber _todes | todes | cystsin | worms | cephalids| Acantho-| Leeches 
ex- in- in intes- | in intes- | liver, per- in in cephala. | (Piscola). 
amined. | fected. tine. tine. |itoneum,| intes- intes- 
etc. tine, tine. 
91s. 
March: .csrcossresicrsieereerest 4t ane} aweeete tire 11(27) 20(50) 11(27) 4(10) fas} asslaiare woke a 
TE cacimsnimnaeaiiicn tic eeewes 28 24( 86, abo Pe AN 15(53) 
Maye actsacnanusGgccuneeeweiae 45 30(67) 10(22) 1(2) 16(35) 
MIMEL cawtcicnascaoite saw ctseerane 60 28 42 LACAN S crime cote 16(32) 
oe tiantionsc he sickwiew Sencar alee 66 44( 66. 13 a es 42(96) 
AT gtist:, niece oem coer ote ere Ook 57. 43 2s) 10(22 11(25) 29( 72 
PSS PPETT DOL sn alate mirie iets tie nine io nlaivis 43 38(90 35(87 
October ssc cercdekiepecsscewanere 53 48(90) ; Fer -| 47(92 
November i... s1.5f-4..5. «288Gb «lek 37 36(97) ARONA. ocak s.- 32(86, 
Decent ber sc cinarcisiosiccktnest emene 36 2n03s) los. ob aa 1(3) 20(55 
STORE Spastic tare foiniasaaiactiie 46-6 | 34-5(76) | 7-1(14) | 2-5(3-8) |27.2(57.8) | 2-5(s-2) | 1-5(4.2) | 4-0(9.4) o.1(.3) 
1916, 
Ue fl See daadaeeineaoucctgodcd 10 16 C-)) BSE 1(10) 
MeBraATY Sorc toe eas nicole ae 10 10( 100, 1(10) 4( 40, 
a asa 8. is, <iiopigteaauers'gad “Sipps aap ws 20 BUGS) i ccabsnccay 7(35 
372) Cie CINE A cheb ln 8 pte tes erate 41 SOLgG el aset eeaoee 24(60. 
MAY arrecineecnicss cee samentisttten's wa 29 25(86) (3) 11(38) 
SUTITIGT trative sie ainisle ersieelsiarete sin ia “= 16 15(94) 6(37) 1(6) 
Jtlhy sc. ers ane REE OS Ee 33 32(97) (Zaye Ae Ee 
August, 4.1155 9F Cee Or Cee \, 15 15(100) 4(26, 1(6) 
September: +2 Feira tte pene ro 10(100) a(‘Zaph 2 127, a ok 
Decemiben= 7:25 Seats. ere fod 1s ra(8o).}.. Sh Fh 7(46) ie 5 
Average’? “228. 22285 19-9 |18.7(94-7) | x-8(1r) 5-6(24) |17.7(80.4) o |} -6(2.5) | 15(6.4) ° 
Average for both years..... 33-2 | 26(85-3) |4-4(14-6) 4(14) | 22-4(69) | x-2(2.6) 1(3-3) | 2-7(7-9) +(.1) 
TABLE 32.—PERCH INFECTED BY CERTAIN PARASITES IN LAKE WINGRA, 1916-17, SHOWN BY MONTHS. 
[Numbers in parentheses indicate percentage infected of total catch for a single month.] 
Parasites. 
Month. Num- Tape- Tape- Proteo- 
ber | Nema- | worm | worms | cephalid | Acantho-| recches, 
fe cysts. tine. Ez 
1916. 
ainisbe niece's pata eee amt esha meee aR aE SSE 13(76) 2(11) 11(65) aap top Dae 
brtcidon totam smack a: “m Sete an eeepc s 49 Bet I 3} 49(90) Hap aig Sn 
vak pe =a pee er unt tae seme Cit nR Ed 38(92 3(7, 38(92) noo joodace 
«pee oin aaa ave cg cece ae eres Bahslal ser caste al, & GaCes: rppotbadce 
SAE sistant cinisrarmew steer terete rece 42(87) |...sccecee] 42087 PB TRE.. 
BOO OOO HOREIOO CE ior ieionciienics te 38(92 1(2) 38(92 Banceiseceat 
ebay iba inse of vein a, te Apa are ale EI OE 39( 95, a(17) 39(95) ante eRe 
aries TOME eae iar ac 29(93 I 3 29(93, 2(6) 
Sin.niu [eH siaW ee Ns sweeney nRR eae 23(84) 1(3 23(88, PaaS Ane 
Appa ies pon soe COnGMncoenei ea. © ° PUREED ae Aes ee! es FROM Waa Sat Reepognsoel Beene cccce 
1917 
SPAIUISA TT Hs Ues'vi0idis oct wtiito io ctonetine See ROR 15(100) xitzo9) 
Mebmiaryis ¢.-onciencsimwin cicroneniicccinctue ste 16(100) 16(100) ano 
AMCTRZO Ios eroisisaigieeniqaatceh cand tate ace: 27(83) | 1-3(2-7) 30(82) «1(.3) | -7(t-7) | 2-1(5-1) +2(1) 
