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Animal Production Science Animal Production Science Society
Food, fibre and pharmaceuticals from animals

Animal Production Science

Animal Production Science

Animal Production Science is an international journal publishing original research and reviews on the production of food, fibre and pharmaceuticals from animals. Read more about the journalMore

Editor-in-Chief: Wayne Bryden

Publishing Model: Hybrid. Open Access options available

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These articles are the latest published in the journal. Animal Production Science has moved to a continuous publication model. More information is available on our Continuous Publication page.

Published online 23 February 2024

AN23235Does the immune stimulant Amplimune® modulate humoral and cytokine responses to commercial bovine respiratory disease vaccines in cattle?

A. L. Alexander 0000-0003-1238-6783, E. K. Doyle 0000-0002-5255-2187, A. B. Ingham 0000-0001-8006-9443, I. G. Colditz 0000-0001-9497-5148, N. M. Andronicos 0000-0001-5881-2296, B. C. Hine 0000-0001-5037-4703 and T. J. Mahony 0000-0003-4573-7906

Most vaccines do not confer immediate protection in the host; however, concurrent administration of immune stimulants may enhance or impair immune responses to those vaccines. Bovine respiratory disease (BRD) is costly for Australian cattle and, in this trial, concurrent vaccination against BRD with the stimulant Amplimune was investigated and found to have no detrimental effect on immune responses. These findings warrant further examination of the effect of Amplimune on morbidities and mortalities in feedlots.

Published online 20 February 2024

AN23129An initial investigation into the use of machine learning methods for prediction of carcass component yields in F2 broiler chickens

Hossein Bani Saadat 0000-0001-9034-0372, Rasoul Vaez Torshizi 0000-0003-2781-7558, Ghader Manafiazar 0000-0003-4681-8214, Ali Akbar Masoudi 0000-0002-3935-0476, Alireza Ehsani 0000-0001-6933-3469 and Saleh Shahinfar 0000-0003-0730-7577

Evaluation of carcass component yields is costly and time consuming, thus models for the prediction of broiler carcass yields are useful. Three advanced predictive models were applied to predict carcass component yields, and benchmarked against the classical linear regression. Random forest had the best performance among machine learning methods, suggesting that it may be considered as an alternative to conventional linear models for prediction of carcass yields in broiler chickens. In all of the predictive model tested in this study, inclusion of single-nucleotide polymorphisms as predictor features lowered the predictive performance of the model.

Published online 16 February 2024

AN23176Milk composition and health status of quarters adjacent to an on-farm protocol-treated clinical-mastitis gland

Marcel Gomes Paixão 0000-0001-6800-3716, Renata Golin Bueno Costa, Guilherme Nunes de Souza, Sandra Maria Pinto and Luiz Ronaldo de Abreu

Bovine mastitis is the disease that causes the most economical losses to dairy farmers, including veterinary expenses, milk disposal, loss of production and reduction of animal pregnancies. The milk composition of mammary quarter affected by mastitis is not the only one compromised, as the milk quality of entire udder is also affected. A period of 20 days is not enough for animals to fully recover from a case of udder inflammation. Mastitis is more costly to producers and industry than has been previously reported.

Published online 16 February 2024

AN23207Genetic parameters for milk production and body-conformation traits in Dairy Gir cattle

P. Dominguez-Castaño 0000-0002-5675-7702, M. Fortes 0000-0002-7254-1960, A. M. Toro-Ospina and J. A. II. V. Silva

Body-conformation traits in dairy cattle have been associated with health, welfare, and cow longevity, thus affecting herd productivity. The heritability estimates of this study indicated that body-conformations traits could respond to selection. Moreover, the correlations between these traits and milk yield highlighted the importance of considering the correlated response to selection, synergies, and trade-offs between body conformation traits and milk production in Gir cattle. This information is relevant for selective breeding in Gir cattle to enhance tropical milk production.

Published online 13 February 2024

AN23181Effect of heat stress on the reproductive performance of sows: comparison of different thermal-comfort indices in a temperate climate

Abel Villa-Mancera 0000-0002-5997-5641, Maricela Méndez-Rosas 0000-0003-1672-5295 and Juan Cruz-Aviña 0000-0002-0905-9370

It is important for those of us responsible for animal welfare and health to improve pig production and avoid economic loss. We used data such as environmental temperature and humidity to determine the best time for a sow to get pregnant with the finest animal-welfare conditions. This information is useful to reduce sow and piglet stress.

Published online 08 February 2024

AN23049Effect of animal and diet parameters on methane emissions for pasture-fed cattle

Stefan Muetzel 0000-0003-4856-3497, Rina Hannaford 0000-0002-0737-3630 and Arjan Jonker 0000-0002-6756-8616

Methane is a potent greenhouse gas and one of the major fermentation products of ruminants. Accurate measurements of methane emissions and the factors modifying them in pasture-fed animals are very scarce because it requires fresh-pasture feeding indoors. This paper describes the effect of pasture composition and what effects animal factors such as physiological stage, age and sex have on methane emissions from cattle.

Published online 06 February 2024

AN23286Symbiotic can replace zinc bacitracin in diets for layer-type chicks

D. A. Silva 0000-0001-6243-3969, C. B. V. Rabello 0000-0002-5912-162X, M. J. B. Santos 0000-0002-6023-3426, J. C. S. Nascimento 0000-0003-3107-5876, A. G. Ribeiro 0000-0001-6730-0209, E. S. R. Soares 0000-0001-8271-8056, H. E. C. C. C. Manso 0000-0002-4128-3831, L. F. A. Souza 0000-0002-0142-664X, W. R. L. Medeiros-Ventura 0000-0001-5796-2321, R. V. Silva Junior 0000-0002-0208-1065 and M. F. Andrade 0000-0003-4337-4590

The use of antibiotics as an additive growth promoter is being prohibited, because it can cause bacterial resistance. Symbiotics are a viable alternative to antibiotics, because they have constituents (probiotics and prebiotics) that modulate the intestinal microbiota, and promote better results in the use of nutrients and health of the birds, and consequently better productive performance.

Published online 05 February 2024

AN23395A novel production profile classification system for incoming calves that predicts feedlot growth performance

Andreas H. R. Hentzen and Dietmar E. Holm 0000-0002-9340-6573

Previous studies have demonstrated the association of certain phenotypic traits of incoming feeder calves with feedlot production; however, a well-defined classification system does not currently exist for this purpose. We developed a subjective classification system of production potential for incoming feeder calves and demonstrated its ability to predict feedlot growth performance after adjusting for the calf’s starting weight and gender. This classification system opens the way to precision feeding practices in beef feedlots based on the production potential of individual calves.

Published online 01 February 2024

AN23335Meta-analysis of prevalence and associated risk factors for lameness in dairy cattle across tropical Asian nations

Priyanka Patoliya, Mukund A. Kataktalware 0000-0001-8802-5197, Muniandy Sivaram, Letha Devi G., Sakhtivel Jeyakumar, Anjumoni Mech, Ayyasamy Manimaran 0000-0001-9063-2711 and Kerekoppa P. Ramesha

Lameness remains a critical concern in dairy herds worldwide, exerting detrimental impacts on animal well-being, milk yields, and farm profitability. This study endeavours to comprehensively assess the prevalence of lameness in major tropical Asian countries and identify the primary risk factors via a rigorous meta-analysis. The findings emphasise the prevalence of lameness in dairy herds across tropical Asian nations and highlight the potential for reducing its occurrence through enhanced management practices, particularly in relation to factors such as housing, flooring, hygiene, and animal nutrition.

Published online 22 January 2024

AN22471Weaning causes imbalanced T lymphocyte distribution and impaired intestinal immune barrier function in piglets

Li Dong, Mengxuan Wang 0000-0001-6081-9569, Zhong Peng, Hongmin Li, Hongrong Wang, Tao Qin, Yinyan Yin and Lihuai Yu

Weaning decreased bodyweight, imbalanced T lymphocyte distribution, lowered concentration of sIgA and anti-inflammatory cytokines, and increased concentration of pro-inflammatory cytokines in piglets. The impairment of intestinal immune barrier function, which might be associated with the Notch2 signalling, was more severe 3 days post-weaning than at 7 days post-weaning.

Published online 22 January 2024

AN22249Genetic parameters, genetic trends and selection response for gestation length and traits used as selection criteria in Angus breed in Brazil

Daniel Duarte da Silveira 0000-0002-0636-402X, Juan Salvador Andrade Tineo, Patrícia Iana Schmidt, Gabriel Soares Campos, Fabio Ricardo Pablos de Souza, Vanerlei Mozaquatro Roso and Arione Augusti Boligon

Our study explored genetic factors influencing gestation length and traits indicative of productive, reproductive, and morphological performance in Angus cattle, showing potential challenges in calving due to selective breeding decisions. We recommend integrating calving-difficulty measures into selection indices, utilising first-gestation length as a practical alternative, and caution against culling decisions solely based on limited gestation records. This insight is crucial for improving selection criteria and ensuring the survival and growth rates in the studied herds.

Published online 19 January 2024

AN23270Differences in broiler bone, gut, and tissue mineral parameters, as influenced by broilers grouped based on bodyweight

Chinwendu L. Elvis-Chikwem 0000-0003-2160-4324, Gavin A. White 0000-0003-3829-6188, Emily Burton 0000-0003-2784-6922 and Cormac J. O’Shea 0000-0002-1797-1941

Poor performance in broilers constitute challenges from different viewpoints including health, and welfare. Understanding the physiological differences between the high- and low-weight chicks may provide a useful insight into designing the best strategy to mitigate poor performance. This study reported that the low-weight chicks had low gizzard pH and high gizzard fibre content compared with the high-weight chicks. This requires further investigation to understand wheter this relates to feeding behaviour such as litter eating.

Published online 18 January 2024

AN22418Nutritional characteristics estimated by faecal protein in cattle fed with heterogeneous natural grassland

E. B. Azevedo 0000-0002-4541-8043, F. Q. Rosa, R. R. Dornelles, E. G. Malaguez, J. K. Da Trindade 0000-0001-5022-2320, D. D. Castagnara, C. Bremm, G. R. Liska and D. B. David

For better monitoring of the results in beef cattle based on native grassland pastoral systems, it is essential to know the quality of the diet ingested by the animals. The paper presents consistent results of the relationship between the composition of faeces and the diet consumed by cattle. The generated equations can serve as support for experiments in grazing and for nutritional assessment models of commercial herds.

Published online 12 January 2024

AN23268The use of industrial hemp (Cannabis sativa) on farm animal’s productivity, health and reproductive performance: a review

H. T. H. Muedi, T. C. Kujoana 0000-0002-7078-2736, K. Shai, M. Mabelebele and N. A. Sebola 0000-0002-1629-2816

The paper provides a clear overview of hemp’s description, historical production, chemical characterisation, potentials uses and their effects on the growth, reproduction and health of farm animals, and discusses the hemp’s potential applications in the medical and feed industries.

Commercial ducks can often experience high ambient temperatures in summer that adversely affect performance. Pekin ducks were fed grower diets (Days 22–41) with a low or high dietary electrolyte balance. Birds were exposed to a daily high temperature challenge for 9 h on Days 36–41 and provided with water supplemented with an electrolyte formulation at different concentrations with betaine or with betaine alone in the feed. The level of the electrolyte water supplement supporting higher liveweight gain depended on the dietary electrolyte balance.

Just Accepted

These articles have been peer reviewed and accepted for publication. They are still in production and have not been edited, so may differ from the final published form.

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