FURTHER NOTES ON THE NATURAL HISTORY AND ARTIFICIAL 

 PROPAGATION OF THE DIAMOND-BACK TERRAPIN. 



By R. L. BARNEY, 

 Director, U. S. Biological Station, Fairport, Iowa. 



CONTENTS. 



Page. 



Introduction 9 1 



Brood stocks of the experimental farm 92 



Original Carolina brood stock . 93 



Second Carolina brood stock 94 



Texas brood stock 95 



Ratio of sexes and fertility 9° 



Growth 9 8 



Attainment of salable size 100 



Culling ioo 



Winter feeding <°i 



Space requirement 102 



1909 brood 103 



1910 brood io 4 



191 1 brood IO S 



191 2 brood I °6 



1913 brood 107 



1914 brood IQ 8 



Mortality 108 



Summary no 



INTRODUCTION. 



There appears to have been sufficient progress made in the experimental work on 

 the artificial propagation of the diamond-back terrapin, Malaclemmys centrata, at the 

 United States Fisheries Biological Station, Beaufort, N. C, since 19 15 to warrant the 

 drawing up of a report covering such information on this subject as has been collected 

 to date and has remained unpublished. In Economic Circular No. 5, revised, of the U. S. 

 Bureau of Fisheries, 1 the results of observations up to and including 19 15 are cited with 

 methods outlined for construction of pens, selection of brood stock, care of eggs, young, 

 and adults, and some notes on the growth of the terrapins. Much information has been 

 collected since that time by continuing observations on many of the same terrapins 

 considered in the 191 7 report and also through further studies with different purposes 

 begun in more recent years. 



1 Hay. W. P.: Artificial Propagation ol the Diamond-Back Terrapiu. Economic Circular No. 5. revised. U. S. Bureau of 

 Fisheries, Washington, iyi;. 



9 1 



