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"Experientia docet" - Experience is the best teacher

Estimating milk production and energy-use efficiency of pasture-grazed Holstein and Jersey cows using mathematical models

  • 2023
  • Issue: 3
  • Volume: 53
N.M. Bangani, C.J.C. Muller, K. Dzama, C.W.C Cruywagen, F.V. Nherera-Chokuda & V.E. Imbayarwo-Chikosi Page: 326 - 337

The efficiency of feed use for milk production is critical for sustainable and profitable pasture-based dairy systems. The aim of this study was to estimate milk production and energy-use efficiencies of pasture-grazed Holstein and Jersey cows. Lactation records of 122…

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Effect of additives to Italian ryegrass (Lolium multiflorum Lam.) silage on nutrient composition and rumen parameters in vitro

  • 2023
  • Issue: 2
  • Volume: 53
E. Gürsoy, G. Sezmiş, K. Ali & T. Ayaşan Page: 231 - 238

In this study, Italian ryegrass ensiled in laboratory silos was examined in vitro to evaluate the nutrient composition of silage and rumen parameters. In this study, four experimental treatments were included, which included a control group (Italian ryegrass silage), the…

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The effect of fibre source in finishing diets on lamb performance and muscle fatty acid composition

  • 2023
  • Issue: 2
  • Volume: 53
J.F. Macdonald, O.B. Einkamerer, A. Hugo, A. Lepori, M.D. Fair Page: 315 - 325

The objective of this study was to evaluate the effect of dietary fibre sources on the performance, carcass characteristics, and muscle fatty acid composition of finishing lambs. Fifty-eight Merino ram lambs were randomly allocated to nutritionally similar treatment diets differing…

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A comparison of growth models for cross- and purebred lambs in precision livestock farming systems

  • 2023
  • Issue: 2
  • Volume: 53
P.G. Theron, T.S. Brand, S.W.P. Cloete, J.H.C van Zyl Page: 287 - 301

Implementation of precision livestock farming requires extensive information to be gathered on the production cycle of slaughter lambs. Constructing accurate growth models for crossbred sheep from the South African flock would provide valuable information towards this goal. Two dam lines,…

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Different methodologies for determining the nutrient metabolism and energy coefficients of a commercial diet for two species of parrots of the genus, Amazona

  • 2023
  • Issue: 2
  • Volume: 53
S. D. T. Menezes, G. A. J. do Nascimento, T. R. Gomes, R. C. Nepomuceno, P. H. Watanabe & E. R. Freitas Page: 239 - 249

This study aimed to compare two methods of excreta collection: the traditional, total method and a partial method using indigestible neutral detergent fibre (iNDF) as an internal marker for determining the metabolism coefficients of nutrients and energetic value of the…

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Healthy, sub-clinical, and clinical mastitis in Holstein–Friesian cattle: A comparative echotextural and electrical conductivity study

  • 2023
  • Issue: 2
  • Volume: 53
O. M. Abdullah, S. Aslam, M. A. Khan, H. Mushtaq, M. Hassan, and M. Ijaz Page: 221 - 230

The goal of this research was to investigate the echotextural parameters, numerical pixel values (NPVs), and pixel heterogeneity (PSDs) of the lymph node and udder parenchyma, as well as the correlation between echotextural parameters and electrical conductivity (EC), in order…

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Behavioural responses of alpacas (Vicugna pacos) to novel objects

  • 2023
  • Issue: 2
  • Volume: 53
J. Kapustka & M. Budzyńska Page: 211 - 220

In recent years, keeping alpacas has becoming increasingly popular. However, little research has been conducted on their behaviour. The study aimed to assess behavioural responses of alpacas towards novel objects as a step toward a practical test including novelty and…

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Dietary protected fat and conjugated linoleic acid improves ewe milk fatty acid composition

  • 2023
  • Issue: 2
  • Volume: 53
A. Grigorescu, I. Balta, C. Julean, E. Simiz, S. Voia, D. Stef, E. Alexa, I. Popescu, A. Marcu, I. Pet, T. Callaway, N. Corcionivoschi, L. Stef Page: 197 - 210

The effects of protected fats (Optima 100) and conjugated linoleic acid (Endulac®-CLA) supplementation on sheep milk saturated and unsaturated fatty acid composition were investigated. Sheep were divided into four experimental groups (15 ewes/group) including: i) a control group - basal…

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Effects of lamb sex, parity, and birth type on milk yield, lactation length, and milk components in Zom ewes raised under semi-intensive conditions

  • 2023
  • Issue: 2
  • Volume: 53
T. Bayrıl, F. Akdemir, M.S. Baran, C. Orhan, İ.H. Yıldırım, A.Ş. Yıldız & R. Çelik Page: 185 - 196

This study aimed to determine the effects of parity, birth type, and lamb sex on milk yield, lactation length, milking period, and milk components in Zom ewes. In this study, which included 83 Zom ewes, it was observed that birth…

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Spatio-temporal epidemiological survey reveals high infestation and extensive species diversity of hard ticks infesting camels from Pakistan

  • 2023
  • Issue: 2
  • Volume: 53
Ayed Alshammari, Sampson Agyapong Atuahene, Qian Xu Sheng, Muhammad Jamil, Sami Ullah, Shakir Ullah, Muhammad Kashif, Muhammad Qasim, Obaid Ullah, Mourad Ben Said Page: 174 - 184

Camel production is severely hampered in Pakistan by a wide range of diseases, including ticks and tick-borne pathogens. Camels serve as hosts for various tick-borne pathogens that can lead to human illnesses. Thereby, it was necessary to identify tick species and…

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Effect of starch and crude protein in supplemental feed on rumen fermentation, growth performance, and carcass characteristics in early- and late-fattening Hanwoo steers

  • 2023
  • Issue: 2
  • Volume: 53
Byung Ki Park Page: 161 - 173

Recently, there has been an increased focus on developing high-energy and high-protein feeds for Hanwoo steers in Korea to reduce the fattening period and decrease production costs. The aim of this study was to investigate the effects of different starch…

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Phenotypic diversity of local goats in northern Mexico

  • 2023
  • Issue: 2
  • Volume: 53
G. Torres-Hernández, L.D. Granados-Rivera, G. Castillo-Hernández, J. González-Maldonado, P. Arenas-Baez; J.A. Maldonado-Jáquez Page: 148 - 160

The study documented phenotypic diversity of local goats from Comarca Lagunera in northern Mexico. Two hundred and five goats were chosen from 2980 local animals. Morpho-structural and phenotypic traits, age, live weight, body condition, and 33 zoometric characteristics were recorded.…

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Performance, carcass yield, and meat quality of buffalo (Bubalus bubalis) fed on diets with different levels of concentrate

  • 2023
  • Issue: 1
  • Volume: 53
S. A. F. Melo, A.L.R. Magalhães, M.L.M.W. Neves, F.F.R. de Carvalho, A. A. S. Melo, G. H. P. Vieira, D.O. Lima, D.M. De Lima Júnior, R.A.S. Pessoa Page: 133 - 138

The objective of this study was to evaluate the influence of diets with increasing concentrate levels on performance, carcass characteristics, and meat quality of Murrah buffaloes in feedlot. Twenty-four animals, with an initial body weight of 240 ± 50.5 kg…

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Assessing the efficiency of smallholder wool farmers in the changing paradigms of the Free State province of South Africa

  • 2023
  • Issue: 1
  • Volume: 53
A. D. Ntsiapane, J. W. Swanepoel, A. E. Nesamvuni & T. O. Ojo Page: 125 - 132

The South African population is predicted to increase to almost 66 million by 2030. This necessitates paradigm shifts to improve agricultural efficiency. However, South African wool production has continuously declined over the past three decades. The study analysed the efficiency of smallholder…

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Effects of yeast hydrolysate versus plasma powder on growth, immunity, and intestinal morphology of weanling piglets

  • 2023
  • Issue: 1
  • Volume: 53
X.Q. Hu, Z. Gao, J.P. Hu, W.B. Wang, J.J. Dai, AQ. Gong & X.D. Wang Page: 117 - 124

 Yeast hydrolysate (YH) is rich in amino acids, small peptides, B vitamins, glutathione, and nucleotides, which makes it a possible substitute for spray-dried plasma powder (SDPP). This research was conducted to estimate the application of YH instead of SDPP in creep…

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In vitro ruminal fermentation parameters of canola meal protein in response to incremental doses of gamma irradiation

  • 2023
  • Issue: 1
  • Volume: 53
M Sekali, V Mlambo, U Marume, M Mathuthu Page: 109 - 116

Rapid ruminal degradation of canola meal (CM) limits its feed value for high-producing ruminants. Attempts to reduce ruminal degradability of CM through gamma irradiation have generated conflicting results. While this strategy has the potential to reduce CM degradability, the optimal…

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