CIIAHAC'J'F.HS r()\('KI{\Kl) 1\ I'lHlNDIlV 'JnrJ 



Uy means i>f imiltiplo i-orrt-latioii tlu- cliarac-torislii-s ajic at lirst rii^x, K-njrll) 

 lit" winter pause, winter eluteli si/e, total (lays i)r(><)(ly and annual perslstem y 

 have eolleetively been correlated with annual esrg production. The constant 

 obtained is R = -(-.861-'2. This constant sliows tliat the live traits considered 

 show ajiifrh decree of correlation with annual jiroduction and that they are 

 \ cry larjrely responsible for annua! produclion. 



Summary 



Relation to Each Otlier of Characters Concerned in l^'ecundity 



Simple Net 



Characters Compared Correlation Correlation 



Aire at lirst eirg Length of winter ]>ause — .2329±.0138 — .2236±.0139 



Age at (irst egg Winter clutch size — .2273±:.0103 — .1879±.0105 



Age at first egg Total days broody +.0062±.0194 +.0473±.0194 



Age at first egg Annual persistency — .6U6±.0090 — .5956±.0093 



Length of winter pause Winter clutch size — .0671.±.0145 — .0874.±.0U5 



Length of winter pause Total days broody — .1832±.024.3 — .1609±.0245 



Length of winter pause Annual persistency +.1017±.0182 — .0393±.0183 



Winter clutch size Total days broody +.2205±.0186 +.2079±.O187 



Winter clutch size Annual persistency +.1692±.0130 4-.0190±.0134 



Total days broody Annual persistency 4-.0532±.O2O9 +.0579±.0209 



Relation to Annual Production of Characters Concerned in Fecundity 



Age at (irst egg Annual production — .4380iii.0134 — .0238±.0177 



Length of winter pause Annual production — .2107±.0176 — .5487±.0128 



Winter clutch size Annual production +.3544±.0117 +.4944±.0101 



Fotal days broody Annual production — .1964±.0194 — .5630±.0097 



Annual persistency Annual production +.7082±.0072 -f. 7501 ±.0063 



The partial or net correlations tabulated above indicate the following rela- 

 tionships: 



1. Age at first egg and winter })ause arc sigiiiCicantiy but not intimately 

 negatively correlated. 



2. Age at first egg and mean winter clutcli size are negatively correlated to 

 a significant but not intimate degree, 



3. Age at first egg and total days broody are independent. 



I. Age at first egg and anniud persistency are intimately correlated and 

 early sexual maturity is linked with high persistency. 



5. Length of winter pause and winter clutch size are independent. 



6. Length of winter pause and total days broody are negatively correlated 

 in a minor degree. 



7. Length of winter pause and annual ))ersistency are independent. 



8. Mean winter clutch size and total days broody arc positively correlated 

 to a moderate degree. 



!). Winter clutch size and annual persistency are independent. 



10. Total days broody and annual persistency are independent. 



