Vol. XLVI January, 1924 Xo. I 



BIOLOGICAL BULLETIN 



STUDIES ON THE INFLUENCE OF INANITION ON 



THE DEVELOPMENT AND THE DURATION 



OF LIFE IN INSECTS. 



STEFAN KOPEC. 



! I'.-llli IK FOR A<;RICeLTCRAL RESEARCH. PlI.UVY. i 



WITH 3 TABLES. 



CONTENTS. 



i I IM mtliH ii. ol ::. .1:. it ion on the duration of separate dcvclnpiin-nt.il -t. . 



2. Inanition anil it- tx-arinK <>n the physiology of insect metarnoi; 



<. Inaiiiiii.ii and certain problems of growth.. . 



.}. A'l.i]>i.iti"ii of organisms to starvation. Some remarks on tin- |n..M.. in \ 



death .......................... i ^ 



-iiiimiary ............................. 



Hit experiments were performed on the caterpillars oi tin- 

 ii'iiiniun moth Lymantria dispar I.. Each e.xprrinu-nt ri.n-i-ifi| 

 "I ~iAcr.il separate broods. The caterpillars <lcii\in^ It "in mic 

 \\i-re divided in two parts and put in t\\<> j.ir-. "iic p.irt 

 suliji-cted to starvation, the other, d.iiK ted. was u-cd .1- a 

 control. I lie inanition applied in the-r >nnlic- u.t- tnt.il but 

 intcnninciii. the caterpillars being totally de|>ri\ed < .|" t'.,. ,<1 dur- 

 ing (crt.iiu days and fed ad libitum during the rein. lining;. Th- 

 distribution of these clays was different in different -eric- of ex- 

 periments, .1- may easily be -ecu from t.ible- i to 3. The obtained 

 pupa- beinu kept e.nli -ep.ir.iiely. it \\.i- p'--iblc to -ludy the 

 iiillui'iuc M| -i.irx.itidii imt onl\ on tlu- duration of the stage "I 

 i .iterpillars, but also on that of e.u h rhr\-.ili- .md e.u I) moth. 



hi the chief e\l)criiucllt- '-eric- .1 to /' the whole material 

 consisted of u.Vi -tarxeil caterpillar-, and >>4^ -pccinicn- lor 

 control; 547 |>up.e \\crc obtaineil from the caterpillar- -ubjei ted 

 to -tarxation and 70^ from control lar\a-; the\ prodin'i-il 470 



"-tar\ed" and <>N.^ comn.1 moth- a'f. Table I Phe increased 



; Papei iii'in tin- 1 .ili..i.ttnt\- ni l-;\priinirin:il M.irphnli>i;y.. i i \l I n- 



\ .:.' Polonai . Ruralt : Pulm \'t>\. i. i 



i 

 I 



