Effect on Growth of Supplements to Chick Rations Containing Vitamin B12 and Antibiotics

Abstract

Twenty-four New Hampshire pullets assigned at random to 6 sire groups were used to produce a total of 665 chicks. Each chick was injected with 0.6 mg. each of testosterone propionate and stilbestrol dissolved in sesame oil administered in 6 equal injections over a 12-day period. The chicks were then sacrificed and records made on body, comb, and oviduct weights. Analysis of the data revealed that there were significant differences between the sire families and between dam families within sire families with respect to body weight, comb weight, and oviduct weight. Since all chicks were subjected to relatively high androgen and' estrogen levels, these results indicate that these differences in weights are the result of differences in tissue response. Heritability values for the three measurements were as follows: Body weight 0.22, comb weight 0.13, oviduct weight 0.23.

Fish Meal and the Response of Chicks to Antibiotics

“…Fuller et al (1952) found, with chicks, that condensed fish solubles, dried whey and liver fractions contained unknown factors, but that these factors were not influenced by the presence or absence of antibiotics. Sunde et al (1952) concluded that fish solubles, torula yeast, meat scraps and condensed homogenized fish contain a factor which stimulates the growth of chicks fed an all-plant ration containing vitamin B12 and an antibiotic. Ringrose and Potter (1952) found fish meal replacement of soybean oil meal to increase growth and feed efficiency, irrespective of Bn.…”

B Grubu Vi̇tami̇nleri̇ Bakimindan Faki̇r Etvetv Rasyonlarinda Balik Ununun Etki̇si̇

“…Nitekim ilk yapılan ara~tırmaların büyük bir kısmında (I, 5, i 1, 12,13,16,20,21). ribofIavin Je pantoten asid gibi B grubu vitaminlerinin rasyonlarda yetersiz bulunduğu görülmektedir.…”

Growth Promoting Activity of Ash When Fed in Practical Diets to Chicks

“…Other work on unidentified growth factors required by the chick and poult (Carlson et al, 1949;Heuser and Norris, 1951;Couch et al, 1952;Fuller et al, 1952;and Sunde et al, 1952) has established the presence of a growth factor or factors in fish meal and fish solubles which has been designated as the "fish factor." The existence of different factors in dried whey and fish products which are additive in the effect on growth has been reported by Couch et al (1952) and Camp et al (1955).…”