part of the laboratory procedure for fected. Later, after extensive research, 



poultry disease research was by now Ringrose determined that the protein 



standard and would be valuable in and energy content of a ration should 



investigating the synovitis problem. be in proper balance for highest feed 



r, r- a^ ^ • i- i- ^u efficiency of the growing chicken. 



R. G. Strout,mvestigatmgthesyn- ^t- • . i ii . • . 



rr X r J r x n- Niaciu, a water-soluble vitamin, is 



ergistic ettect or drugs tor controlling j ji i. i . , .1 . . ^ 



,, ° . , ,. , ■? r-- ■ , . u needed by poultry, but at that time the 



the intestinal parasite Eimena which . . r /i • 



J • 1- • 1 1 requirement tor this vitamin was not 



produces coccidiosis, began research , „. , , , . . 



r , ,1 , , r xu known. Rmgrose developed a niacm- 



to propagate the several stages ot the j r- • ^ • 1 i- 1 • 1 



^ .f IT 1 • 11 ix deticient experimental diet on which 



parasite lite cycle m a cell culture ,l t_. 1 . , , ,.1 , 



^ , • xi_ 1 u X the birds remained healthy and sur- 

 system in the laboratory. • j rr^i , , . , . 



vived. Ihe research culminated m a 



One million breeder chickens were 1965 paper entitled, "The Niacin Re- 

 tested for pullorum disease in 1955, quirement of the Hen." 



and nearly 4,000 birds were examined , .i 1 .^^^ r n 

 . ,, „• X- T u X In the early 1960s, following re- 

 in the Diagnostic Laboratory. ^. XT-.- . 1 p. 1 



tirement, Rmgrose turned to tish nu- 



In the field of poultry manage- trition. Recreational fishing in New 



ment,W. C. Skoglund investigated the Hampshire had outstripped natural 



role of light intensity, wavelength and reproduction of trout, the most popu- 



duration on growth, feed efficiency, lar fish. In cooperation with the N.H. 



mortality and egg production. He also Fish and Game Department, he inau- 



examined the effect of hatching tem- gurated a program to develop a suitable 



perature and humidity of eggs prior to dry pellet feed that was inexpensive 



incubation on hatchability and chick and easy to prepare and store. 



quality. The New Hampshire Egg Pro- t .i m tt 1 • i 1 



J ^. T. , , . 5^„^„ .J J In the New Hampshire and other 



duction lest, begun m 1959, provided t^ -i ^t. , , 1 r 1 



, 1 • ? t. 1 r X Broiler Tests, a random sample of the 

 a means by which breeders ot egg-type . , i , r , , , . 



,. , 11 ix • !_• J X- commercial product ot each breeder IS 



chickens could obtain unbiased esti- i x j r x •. r • . 



rxu X- X X- 1 r X T evaluated tor traits ot economic im- 



matesot the genetic potential ot stocks , ^t • .1 xt tt 1 • 



, . ijx -1 ix portance. Using the New Hampshire 



being sold to commercial poultrymen. ^^ -i t. x r -tx- t»t 1. ^ ^^n- 



° r J Broiler Test facilities, W. M. Collins 



An experiment was begun to an- and Skoglund determined which of 

 swer this question: Can restricting the the traits being measured were de- 

 feed of a pullet grown for flock re- tecting genetic differences among 

 placement be beneficial? Data obtained stocks. Based upon their findings, the 

 by R. C. Ringrose, nutritionist, indi- facilities were remodeled to provide 

 cated that the major advantage of such duplicate pens for each entry thus 

 restriction was a 20 percent reduction improving the Test. In other research, 

 in feed use. However, pullet weight Collins selected adult males for more 

 was decreased by one-half pound and efficient use of feed, and compared the 

 sexual maturity was delayed by 8-9 efficiency of recurrent vs. closed flock 

 eggs, but egg production was unaf- selection for improving broiler stocks. 



41 



