J.J. Callan

University College Dublin — Ireland

Agricultural and Biological Sciences · Life Sciences

32h-index3.0kcitations108works0.02yr avg
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Research Topics

Animal Nutrition and Physiology(65), Ruminant Nutrition and Digestive Physiology(50), Meat and Animal Product Quality(23), Reproductive Physiology in Livestock(18), Animal Behavior and Welfare Studies(15)

Publications108 total

Effect of forage source and a supplementary methionine hydroxyl analogue on rumen fermentation parameters in lactating dairy cows offered a low crude protein diet
Animal Feed Science and Technology·2013· 10 cited
Degrees of Separation
SUNY Digital Repository Support (State University of New York System)·2012
The response of growth performance, nitrogen, and phosphorus excretion of growing–finishing pigs to diets containing incremental levels of maize dried distiller's grains with solubles
Animal Feed Science and Technology·2011· 19 cited
Modification of selected bacteria and markers of protein fermentation in the distal gastrointestinal tract of pigs upon consumption of chitosan is accompanied by heightened manure odor emissions1
Journal of Animal Science·2011· 24 cited
Effect of dietary phosphorus and calcium level and phytase addition on performance, bone parameters, apparent nutrient digestibility, mineral and nitrogen utilization of weaner pigs and the subsequent effect on finisher pig bone parameters
Animal Feed Science and Technology·2011· 38 cited
Effect of crude protein and phosphorus level on growth performance, bone mineralisation and phosphorus, calcium and nitrogen utilisation in grower-finisher pigs
Archives of Animal Nutrition·2011· 10 cited
Effect of phytase level in a low phosphorus diet on performance and bone development in weaner pigs and the subsequent effect on finisher pig bone development
Livestock Science·2011· 22 cited
The effect of benzoic acid concentration on nitrogen metabolism, manure ammonia and odour emissions in finishing pigs
Animal Feed Science and Technology·2010· 40 cited
Comparison of a wheat-based diet supplemented with purified β-glucans, with an oat-based diet on nutrient digestibility, nitrogen utilization, distal gastrointestinal tract composition, and manure odor and ammonia emissions from finishing pigs1
Journal of Animal Science·2010· 9 cited
The effect of cereal type and exogenous enzyme supplementation on intestinal microbiota and nutrient digestibility in finisher pigs
Livestock Science·2010· 13 cited
The effects of lactose inclusion and seaweed extract on performance, nutrient digestibility and microbial populations in newly weaned piglets
Livestock Science·2010· 16 cited
Effect of dietary mineral level and inulin inclusion on phosphorus, calcium and nitrogen utilisation, intestinal microflora and bone development
Journal of the Science of Food and Agriculture·2010· 21 cited
The effect of dietary Laminaria derived laminarin and fucoidan on intestinal microflora and volatile fatty acid concentration in pigs
Livestock Science·2010· 25 cited
Effect of phytase concentration in a low phosphorus weaner pig diet and its subsequent effect on bone development in the finished pig
Livestock Science·2010· 11 cited
Effect of dietary phosphorus level and phytase inclusion on weaner pig performance and subsequent bone development
Livestock Science·2010· 2 cited
Effect of supplementation of exogenous β-glucans and enzymes on nutrient digestibility, manure odour and ammonia emissions from finisher boars
Livestock Science·2010
Effect of crude protein and phosphorus level in a phytase supplemented grower finisher pig diet on phosphorus and calcium metabolism
Livestock Science·2010· 2 cited
Dietary supplementation with chitosan at high and low crude protein concentrations promotes Enterobacteriaceae in the caecum and colon and increases manure odour emissions from finisher boars
Livestock Science·2010· 13 cited
Effect of β-glucan source and exogenous enzyme supplementation on intestinal fermentation and manure odour and ammonia emissions from finisher boars
Livestock Science·2010· 4 cited
The effects of cereal-derived β-glucans and enzyme supplementation on intestinal microbiota, nutrient digestibility and mineral metabolism in pigs
Livestock Science·2010· 19 cited
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Frequent Co-authors

J.V. O’Doherty(32), Torres Sweeney(13), F.P. O’Mara(11), M.B. Lynch(9), T.M. Boland(9), K.M. Pierce(8), P. O. Brophy(8), D.K. Lovett(7), C. J. O’Shea(7), P. McCarthy(6), T.F. Crosby(6), B. Flynn(5), P.J. Quinn(5), John T. O’Sullivan(4), M. Hawkins(4), S. Lovell(3), L. Stack(3), D.A. Kenny(3), F.J. Mulligan(3), M. Rath(3)