HABITS OF THE BLACK CRAPPIE. 
TABLE 1.—F oop oF ADULT 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.] 
3 j a Pg pers tr ek 
oO . + = . 
Soalenewn merle rime fog | Berl Bip tyes pad 
= eileen tee | 2 | Cub B | Bo |e ctemiabed 
3 bo ri is a & Bf a 2 pA s a as) 
re qa ie) a = a ma Ke} Ko} o s 
Month. o 2, ; 5 : = a 3 x 4 : a 3 
we FE 3 E 3 5 o iS 8 Qi i 
i © 5 2 a cs 2 2 ° 5 ° & 
2 Ed =U a a a = = = =e = + 
HP Bel SEL eal Sle 21/8 (S148 18 1) 8 
_— ° al oy 
al ve un ere oor ub ode (|e SP ut get pS 
Mm. | 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. - - eg als Bee ae ee OFG i WOME TOR ees eee Pe PSUR Resale Esl Es aes Se 
Mareh. ...--. AN ZO2n Oh eto 1040" |222 222 Oy | eos acc sta Sense ee res Sees Maeeeeete! Meme ene 
Aprilttts 2%. % TOW IAT tee DAVE HOS LS. 2Gs2) eeeeee 15.20) OH echi2e Corl areal ees oe 
MAY = o's <siara.2 a AS) aay SU > Sa RP? Ss nt G2Stieeaece Se Sees 42Diil(s face B4,/Bylvsse: 
JUNG. 2.LS85 =: 37 | 165.2 -8 | 29.9 Bar|, DiGi oscecr 1 a es eh RON. S= mallslekes 
A [0 bi eee eee 35 | 166.0 | 18.8 | 22.6 | 4.2 19d} oases AD) econ) a0 see SOLS aad slesat sche 
Atipust: 22222 12 | 173.3 | 39.0] 6.2 in| LEC S80 eG yoece. seco e 23.9 4) 2.0 
September. - - 8| 177.0} 5.0 28 Vie oe See SS ce Ria es ae PS eee ae a 
October. ..... Ash AMOS AZ\T13) StL OSON IS 2a). ace leases 2 |----+-[------[------[-2----]22-2--]------ 
Average.| 15.6 | 171.4] 88] 14.5] 2.1] 5.6 64) 23 1 -6] 9.0] 3.9 
= 
2 3 
| a oj | ok 
cs . a 4 
a bo Be) 4 ; g 
Month. sg as ell RPO ead ede el s 2 
= He Bis |s|¢e || ¢ chaeule = 
° Pes ° o 5 n oo 
Se era ee RN eS a a z a|o 
o S q = q D Bi ac} a eat Ngee sg x Q 
as | SS a < ° 2) 1S) O 4 < AY a 6) 
P.ct.| P.ct.\ B.ct.\ P. ct: | P.ct:\'P.et: | P:ct.\ P.ct.| P.ct. 
HERMMIATY: «a5 oo] ame Sees Sele eS ll so eee ll ee 18s | ORS) ees le ee (57) Rae i ee 
Marches cece eae! loses alates Sloe eee eaOae lease Freie Pe | Oo Ul [ae ee Of1t| eee. 2:2 
£5 a ae i Ora | 16.8 | OC ee ae Say 1.2] 0.5 4 
May setae ll eee el OOH ect ON Tall oan oe By es on ae a |S SAE 8 3 eee 
dibiel:ersee eee Pale 22.07] ae ee eel ee ce cls ee 1.6 5 Al 
dtlys ese Sil Ah We ECO eR 3 S| eae Be ee | eee 
AUPISE. <0. Pe lng 058.7 (il | ee OARS 2.3 Be Wea il ks = 
FSLE] aN 21321] e] =) Pie Se |p Wael | eA de lag el gl he PT OOS ets CIMA OSG. atalaeemetel aera 
BLT) TEP eset lee ED || ei || culate | Bell ho oh A ee CL POM ies Se eer 2.2L Seees SSSR ISe fake 
Average. . -1} 5.0] 33.0] + + ol: 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 LARV®, 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 
INSECT LARVa#—Continued. 
Diptera larye—Continued. 
Chironomus decorus, 12, April—August. 
Cc, 
c: 
ber. 
C. lobiferus, 8, February—August. 
digitatus, 11, May—November. 
fulviventris, 12 
(1), April—Novem- 
