Temperature mapping of trucks transporting fertile eggs and day-old chicks: Efficiency and/or acclimatization?

Nazareno, Aérica Cirqueira; Silva, Iran J. O. da; Vieira, Frederico Márcio Corrêa; Santos, Rodrigo Zeni dos

doi:10.1590/1807-1929/agriambi.v19n2p134-139

Cited by 12 publications

(19 citation statements)

References 22 publications

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“…All procedures involving the manipulation of hatching eggs have their relevance in the hatch and quality of broiler chicks and the logistics of live load in Brazil, specifically in the aviculture sector, faces various problems (Nazareno et al, 2015). In this study, attention is drawn to the multifactorial problem of road transport, focused on mechanical vibrations.…”

Section: Introductionmentioning

confidence: 99%

Mechanical vibrations in the transport of hatching eggs and the losses caused in the hatch and quality of broiler chicks

Donofre

Silva

Nazareno

et al. 2017

J Agricult Engineer

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Many factors present in eggs' transportation from incubator to growing confinements can damage their integrity and, consequently, the results of the incubation. This study aimed to evaluate whether the intensity and duration of exposures of hatching eggs to mechanical vibrations were capable of affecting the hatch and the quality of broiler chicks. Four treatments, determined by two intensities of vibrations and two durations of exposures were evaluated and compared with a control group in a randomised design in blocks with four repetitions. The vibrations were applied by a mechanical shaker before incubation. Then the eggs were incubated and as the following responses were evaluated: hatchability, the type of embryonic mortality, the quality of the birds and the total of losses. The analyses were carried out by a binomial regression model, with application of the Wald test at 5% significance level. The results showed that the exposure of eggs to mechanical vibrations harmfully affects the hatchability and reduces the ratio (percentage) of high quality chicks. Highest vibration level together with longer duration of exposure resulted in worst hatchability and losses. It is argued that the mechanical vibrations are potentially damaging and should be regarded as an important factor in the management of hatching eggs.

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Section: Introductionmentioning

confidence: 99%

Mechanical vibrations in the transport of hatching eggs and the losses caused in the hatch and quality of broiler chicks

Donofre

Silva

Nazareno

et al. 2017

J Agricult Engineer

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“…This can be explained by the fact that chicks have a large body surface area to volume ratio, making them less effective in conserving body heat. Indeed, the thermoregulatory system of chicks is not fully developed in the first week of life, indicating the need for higher environmental temperatures for young birds to maintain normal core temperature (Cordeiro et al, 2010;Nazareno et al, 2015). Therefore, air temperatures below the thermal requirements will inevitably cause financial losses because a higher portion of the feed energy is diverted to thermoregulation or the survival of the animal as opposed to production (Schiassi et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Performance of chicks subjected to thermal challenge

Ferraz

Yanagi

Lima

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of thermal challenge at different intensities and durations on the production responses of 3 to 21-day-old broiler chickens. Two hundred and ten Cobb chicks were subjected to dry-bulb temperatures (t db ) of 27, 30, 33, or 36°C for the duration of 0, 1, 2, 3, or 4 days from the second day of life onwards. The experiment was carried out in four identical environmentallycontrolled wind tunnels. Data on body mass (BM), feed intake (FI), and water intake (WI), all in grams, were monitored daily; and body weight gain (BWG), in grams, and feed conversion (FC) were also calculated. The effect of duration was not statistically significant. Empirical models were adjusted to relate BM, FI, and WI with t db and bird age. The performance of chicks at 21 days of age was analyzed using the BM, FI, WI, BWG, and FC values. Overall, the development of chicks at 33 and 36°C was better than that of those subjected to the lower t db of 30 and 27°C. The exposure of chicks to cold thermal challenge in early life can have a carry-over negative effect on their production performance up to 21 days of age.Index terms: air temperature, broiler, carry-over effect, production responses, thermal stress. Desempenho de pintinhos submetidos a estresse térmicoResumo -O objetivo deste trabalho foi avaliar o efeito do estresse térmico em diferentes intensidades e durações sobre as respostas produtivas de frangos de corte de 3 a 21 dias de idade. Duzentos e dez pintinhos Cobb foram submetidos às temperaturas do bulbo seco (t bs ) de 27, 30, 33 ou 36°C durante 0, 1, 2, 3 ou 4 dias, a partir do segundo dia de vida. O experimento foi conduzido em quatro túneis de vento climatizados idênticos. Dados de massa corporal (MC), consumo de ração (CR) e consumo de água (CAg), todos em gramas, foram coletados diariamente; e ganho de massa corporal (GMC), em gramas, e conversão alimentar (CA) também foram calculados. O efeito da duração não foi estatisticamente significativo. Modelos empíricos foram ajustados para estimar MC, CR e CAg em função da t bs e da idade das aves. O desempenho dos pintinhos aos 21 dias de idade foi analisado a partir dos valores de MC, CR, CAg, GMC e CA. Em geral, o desenvolvimento de pintinhos a 33 e 36°C foi melhor que o dos submetidos às menores t bs , de 30 e 27°C. A exposição de pintos de corte ao frio nos primeiros dias de vida pode causar efeito residual em suas respostas produtivas até 21 dias de idade.Termos para indexação: temperatura do ar, frango, efeito residual, respostas produtivas, estresse térmico.

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“…Some of the biggest issues of shipping alive chicks in air-conditioned trucks are related to thermal heterogeneity inside containers and inadequate air circulation (QUINN & BAKER, 1997;NAZARENO et al, 2015aNAZARENO et al, , 2015b, resulting in possible economic losses.…”

Section: Introductionmentioning

confidence: 99%

“…In this sense, MARQUES (1994) recommended container temperatures between 22 and 31 °C and relative humidity of 50%. However, NAZARENO et al (2015aNAZARENO et al ( , 2015b suggested an air temperature range and relative humidity inside chick boxes of 32-35 °C and 50-60%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Prediction of mean surface temperature of broiler chicks and load microclimate during transport

Nazareno¹,

Silva²,

Fernandes³

2016

Eng. Agríc.

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This study aimed to determine a model to predict mean surface temperature of broiler chicks and live load microclimate conditions during transport by using neural networks. The research was conducted in the state of São Paulo, Brazil, by monitoring nine shipments with different density of boxes using an air-conditioned truck with an average capacity of 380 boxes. Fourteen chick boxes were chosen on each shipment, assessing five chicks per box. The mean surface temperature of chicks (MST) was measured with an infrared thermometer in both loading and unloading. By assessing the container microclimate (center and inside boxes), air temperature (T), relative humidity (RH) and specific enthalpy (h) were recorded; thereby, seventeen data loggers were placed, one per box (14), and three along the container. MST and truck microclimate were analyzed using artificial neural networks with a single layer and seven neurons, which were trained with the least mean square (LMS) algorithm. MST in the unloading showed a better prediction of MST during transport. The best prediction of microclimatic conditions was obtained inside the boxes during the shipment.

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Temperature mapping of trucks transporting fertile eggs and day-old chicks: Efficiency and/or acclimatization?

Cited by 12 publications

References 22 publications

Mechanical vibrations in the transport of hatching eggs and the losses caused in the hatch and quality of broiler chicks

Mechanical vibrations in the transport of hatching eggs and the losses caused in the hatch and quality of broiler chicks

Performance of chicks subjected to thermal challenge

Prediction of mean surface temperature of broiler chicks and load microclimate during transport

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