ANIMAL BEHAVIOR STUDIES 



AT THE R. B. JACKSON MEMORIAL LABORATORY, 



BAR HARBOR 



f Herbert S» Langfeld, 

 Princeton University 



This is a report on experiments on heredity and social behavior 

 at the Division of Behavior Studies of the Hamilton Station of the 

 R. B. Jackson Memorial Laboratory at Bar Harbor, Maine*. 



The Jackson Laboratory is concerned with the general problem 

 of growth, and is well known for its cancer research. The Hamil- 

 ton Station Behavior Laboratory was established by the Rockefel- 

 ler Foundation for research on heredity and Social Behavior. It 

 was made a part of the Jackson Laboratory because, D r Clarence 

 0. Little, for many years its director, was well-sûited as an out- 

 standing geneticist to guide such work on heredity. 



The research is done principally upon dogs. The dogs selected 

 for cross-breeding are: 1. Cocker spaniels, selected for ability to 

 learn game finding by flushing and retrieving. They show a tendency 

 to « set » and lack timidity and aggressiveness. 2. The African Ba- 

 senjis. They have the ability to learn pursuit of game, show unu- 

 sual timidity, a high degree of aggressiveness and are barkless. 

 They have long been isolated from European breeds. It should be 

 noticed from the above that lack of timidity and lack of aggressi- 

 veness go together and likewise timidity and aggressiveness. The 

 following dogs are selected for genetic differences but are not cross- 

 bred. 3. Beagles, which learn game finding by trailing in packs. 



* I have had the privilege of following the work of this laboratory but for 

 most of the information contained in this report I am indebted to Dr. J. P. 

 Scott, Director of the Station and to his colleague. Dr. John L, Fuller. 



