Three trials were conducted to evaluate the effect of moniliformin (M) on performance and immune function in chicks. Day-old chicks were randomly assigned to four dietary treatments (0, 50, 75, or 100 mg M/kg diet). In Trial 1, chicks were placed on treatments for 3 wk and were injected intravenously with 4.6 x 10(6) Escherichia coli on Day 21. Blood samples were collected at 60, 120, and 180 m...

s of papers 35 142 Citric acid improves phytate phosphorus utilization in two breeds of chicks fed a corn-soybean meal diet. K. A. Rafacz*, C. Martinez, J. L. Snow, D. H. Baker, and C. M. Parsons, University of Illinois. Previous research in our laboratory has shown that citric acid improves phytate phosphorus utilization in crossbred chicks (New Hampshire x Columbian) fed a P-deficient corn-so...

Six experiments (EXP) were conducted to evaluate growth performance of different breed crosses of broiler chicks fed diets containing soybean meal, soy protein isolate (SPI), soy protein concentrate (SPC), or rice and casein. Cornish x Plymouth Rock (C x PR; EXP 1, 3, 4, 5, and 6) or New Hampshire x Columbian (NH x C; EXP 2 and 4) cross chicks were used. The chicks were fed a corn-soybean meal ...

This experiment was conducted to evaluate the effects of the broiler’s genotype (Gt) and ambient temperature (Ta) on performance and core body temperature (Tcore) of broiler chicks. A factorial arrangement of two Gt (Hubbard and ISA J57 chicks) and two Ta (moderate, 23±0.5°C and hot, 33±0.5°C) were used in this study. Performance data (body weight gain, feed intake and feed:gain ratio) were det...

A nest of begging chicks invites an intuitive explanation: needy chicks want to be fed and parents want to feed them. Surprisingly, however, in a quarter of species studied, parents ignore begging chicks. Furthermore, parents in some species even neglect smaller chicks that beg more, and preferentially feed the biggest chicks that beg less. This extreme variation across species, which contradic...

A total of 210 twenty twoday-old broiler chicks were used in this programme to investigale the performance, [ca\ intake, digestibility and visceral organ mass of broiler chicks fed with high level of olive pulp.supplemented with two antibiotics: streptomycin and tylosin. The two antibiotics were added to supply 150 nig/kg of the active ingredient. Chicks which consumed the medicated diets had m...

S OF PAPERS 213 M72 Relationship of Hatch Time to Broiler Chick Percentage Yolk Sac and Subsequent Live Performance John Brake*1, Serdar Ozlu2, Okan Elibol2 1North Carolina State University, Raleigh, NC; 2University of Ankara, Ankara, Turkey Broiler hatching eggs from broiler breeder flocks (Ross 344 X 308SF) at 59 and 55 wk of age were used in Experiments 1 and 2, respectively. Eggs were store...

The myopathy associated with vitamin D deficiency has not been well characterized, and it is not known if weakness is a result of a specific effect of vitamin D deficiency on skeletal muscle. Chicks were raised from hatching on a vitamin D-deficient diet, and by 3 wk of age were hypocalcemic and appeared weak. Tension generated by triceps surae during repetitive stimulation of posterior tibial ...

Studies of kin recognition in birds have usually examined parent-offspring recognition, while studies of sibling recognition are relatively rare. Using choice experiments, we studied the development of sibling recognition among common tern, Sterna hirundo, chicks and tested the cues used for recognition. We collected newly hatched common tern chicks and raised them in a laboratory in 10 artific...

The monocular/unihemispheric sleep was studied in male and female domestic chicks reared socially. In first week post-hatching, chicks were reared in couples whilst during the second week, for half of the chicks the cospecific was maintained (Conspec-chicks) and for the other half the conspecific was removed (No-Conspec-chicks). During the first week, female chicks showed a bias for more left-e...