HABITS OF THE BLACK CRAPPIE. 
TABLE 1.—Foop or ApULT CRAPPIES IN LAKE WINGRA, BY MONTHS, FROM 
FEBRUARY TO OCTOBER, 1916. 
[No adults were examined from November to January, because none were caught. All figures referring to 
food indicate percentage by volume; -++ means a trace. Boldface type shows maximum for each month.] 





















- # Boar) S| ge ogee 
Bs) [YB Paiaeetieer imate hog. | Ge.) Boo) Shae iia 
e| € Eiger Pe ya |e |B | ee baig 
z A is) 5 Sa PRS EB es dh Poe Dn eat! by 3 
Month. © 2 =| = = b A s s z A 2 3 
5 2 cS) Fe = a fe 2 = iS) iS) 3 oe 
2 y A Fe! q 2 3 a | & g | a ry 
Sree en ean a berireaiadd | 5) 1B abn Bs Pee 
ea Mie Ape eee de Se lee ee lA a | Al ae 
a < & (3) iS) a iS) o) 3) ea] 5) S) o é) 
Um. | P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct 
February. . TE Ve 74d (ee CONG) ACO a Ll (ts (0) Ps | eet > 2 A De Se ee de (meeps 
March. ...-.. AW 20200: |. 2.2. OHO etree A OM eee etl meaner israeli atsin aia |'sie's 02,2 |(Catco.cie| acto eee ee eee 
April a3 TWAT So TS eee yr? UA hee 20) Leeaace 15. 2 MSO ereisskis Table | ee 154 
ES ee LON AT 225 ol 2iauleees c 6. Sy seses 1 Ete eee A Hil oe 345.5] 524 d.|e eee 
JUNO SLs. sess 37 | 165.2] . .8 | 29.9 PSU BAB oese te Wee Wes yee oO SALT Olio onl oe ee 
dtileee earns 35 | 166.0 | 18.8 | 22.6) 4.2 1 Se ae Bile areca ene a SB 24.) cee lc eee 
August. 222 12 | 173.3 | 39.0] 6.2 Ge Ms eT WAG tas Bako te Gi | ae eee fear ae 23.9 4c ADS | eee 
September. . - 8] 177.0) 5.0 oll jl OPA ene ois SRR Se BOY sails soeic| |e oma Pe) tere Be tae ie See 
October....-.. AA Oa Sa a Ouebles: Pec e- al eo casa Rees eae eeieine calito 22] ha eee eee eae 
Average.| 15.6 | 171.4] 8.8] 14.5] 2.1 5.6 4/ 2.3 spt One 8S Only “330! 2 / 
= 
g = 
S = $ £ 
cs , Ar 2 
3 ry 2 o . 5 8 
Month. g a3 ripe at ag ee yy eel 
= a = 3 z @ 2 4 F 3 Ss} 
a ‘ Bea a ‘d Oo Sh S S a ; 2B q oo 
g 3g KS] 6 a a 2 ; a=) 3 & I o 
S o 14 =] Beil in S| s a ub SOON Seale aaa ce 
ea] a |p = < o) 1) 6) o 4 < Ay a oO 
P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct.|'P.ct.| P.ct.| P.ct.| P.ct.| P.ct.| P.ct 
ebriiary=-= =| seo’ | see hee ee eee [3 eo 1 eee The PEL OT Seer lpdocoe Ll sera bern oe ees 
Marchiits.-2 os. PAGs0 fal RE eee | i OPiS a ara 402.5 heccene TPE EEO oC tol (Seeeae Seeeee Cn BN I eee 2.2 
Noe SS AR eae (EY (aber eae SIG Ol 4a LOSS ieeznONlee ee tesen 2 [cea TZ S085 al 
MEY eas cet lente O52) fe esse ONT 985.04 sme... LD) SVS) EL ea e Lt | aeioetae a Le ee 
{GTS ae peed Seo eee Olbilescaee Ai SG) 20) Paar os eee ea ess ates 1.6 eh Wl ae eee 
Ari eee Se 7 (| Coane eae + .2 mL Sy | ORM Ee ieee ye eee eee 
JNTIET RR ete eo (ae at eae + + Bod Ld hl a7 fl hoa he OL Aa Ant SONS. SS 
fS{eye\itciral) ove) Darel ee ea ae ree ea 5 ol terrae PAMEOOPR EF Pi Ih eed ite a Sd |e Pe 
OpiGnaneere es eee | ee eee (arte ae dlemeee esc oe BCT (eesti (ee We S| |b 2p | eee 
Average..| .5| + -l}] + | 10.9 -1] 5.0] 33.0] + + oul 4 -6 -2 

The following list gives in more detail the exact constituents of 
the food of all the crappies examined from Lakes Wingra, Mendota, 
and Monona, 1915-1917, with periods of seasonal occurrence and the 
percentage which each item forms of the total food.* 

«The methods used for making food examinations were the same as those previously 
employed for the perch and have been described in a paper by Pearse and Achtenberg, 
which is expected to be published shortly by this Bureau. 
LIST OF CONSTITUENTS OF THE FOOD OF 276 CRAPPIES OF ALL SIZES. 
The first figure indicates the number of crappies in which the food 
was found; when the item formed 1 per cent or more of the volume 
of the total food, this percentage is written in parentheses: 
FisH, 39 (6.4), all year. 
Fish eggs, 1, May. 
INSECT LARVA2—Continued. 
Diptera larve—Continued. 
INSECT LARVA, 195 (24), all year. 
Unidentified larve, 5, February—October. 
Diptera larve, 170 (14.5), all year. 
Unidentified chironomid, 77 (7.5), all 
year. 
160695°—20 

14 
Chironomus decorus, 12, April—August. 
C. digitatus, 11, May—November. 
C. fulviventris, 
12 
(1), April—Novem- 
per, 
C. lobiferus, 8, February—August. 
