Influência do transporte e mudança de local de manejo nas variáveis fisiológicas e produtivas de cabras Alpinas

Canaes, Taíssa de Souza; Negrão, João Alberto; Paiva, Fernando Fernandes; Zaros, M; Delgado, Thiago Ferreira Gonçalves

doi:10.1590/s0102-09352009000400023

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…However, after considering all of the stressful challenges, cumulative stress caused a significant decrease in the milk yield during the last challenge (on day 154 of lactation) and on subsequent lactation days (on days 159, 160, and 161 of lactation) when compared with the control goats (Figure 1). Other studies have also described a persistent effect of long-term stressors on the milk production of goats (Canaes et al, 2009;Hooper et al, 2020). However, to our knowledge, this is the first study evaluating the effect of cumulative stress in dairy…”

Section: Table 2 Effect Of Treatment (T) Sampling Hour (H) and Their ...mentioning

confidence: 77%

Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Vasconcelos

Silva²,

Merighe³

et al. 2022

Semina: Ciênc. Agrár.

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This study addresses the hypothesis that acute stress can cumulatively cause a decrease in milk yield in Saanen goats. In fact, dairy animals are subject to several environmental and management challenges that may cause acute stress during the same lactation. However, the cumulative effect of acute stress on milk yield remains unclear. Thus, the objective of this study was to evaluate the effects of different acute stressors on milk yield and milk quality in goats. Thirty Saanen goats were either maintained on their usual routine and comfort conditions (control group) or subjected to different environmental stressors (heat stress, adrenocorticotropic hormone [ACTH] administration, hoof care, and rain). These stressful challenges were performed sequentially, one challenge per day, on four consecutive days to evaluate the influence of the challenge on milk yield and milk quality. The acute stress imposed on goats caused significant changes in respiratory rate, rectal temperature, cortisol, insulin, triiodothyronine, insulin-like growth factor 1, and glucose concentrations when compared to the control group. Although these acutestress-triggered physiological responses are fundamental to restoring homeostasis, the cumulative effects of different imposed challenges caused a change in hormone release, an increase in somatic cell count (SCC), and a decrease in milk yield. In this context, the results of this study indicate that farmers should avoid concurrently subjecting goats to management and environmental challenges that can induce acute stress because these stressors have a negative and cumulative impact on SCC and milk yield.

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Section: Table 2 Effect Of Treatment (T) Sampling Hour (H) and Their ...mentioning

confidence: 77%

Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Vasconcelos

Silva²,

Merighe³

et al. 2022

Semina: Ciênc. Agrár.

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“…Outros autores destacaram que as alterações hormonais relacionadas ao estresse, fornecem a energia necessária para dar suportar as respostas fisiológicas que possibilitam o retorno a homeostasia dentro de algumas horas CANAES;NEGRÃO, 2009;GAIATO;DELGADO;NEGRÃO, 2012). De fato, recentemente nosso grupo demonstrou que o estresse cumulativo causou alterações significativas na temperatura retal, nas frequências cardíaca e respiratória, liberação de insulina, T3, IGF1 e na concentração de glicose plasmática (VASCONCELOS et al, 2020).…”

Section: Discussionunclassified

“…Existe uma correlação entre o estresse ao aumento da CCS, caracterizada pela ação do aumento cortisol que diminui a resposta imune e ocasiona aumento na perda células secretoras (KITCHEN, 1981;BRASIL et al, 2000;CANAES;NEGRÃO, 2009). A CCS de cabras tem características diferentes no final da lactação, com o aumento da apoptose na glândula mamária, ocorre uma tendência a aumentar mais do que outros ruminantes .…”

Section: Discussionunclassified

Efeito de diferentes estressores na produção de leite de cabras Saanen e suas relações com estresse oxidativo na glândula mamária

Vasconcelos¹

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“…Trabalhos científicos avaliaram indicadores de estresse fisiológico durante o manejo de embarque e desembarque de bovinos de corte (FIKE; SPIRE, 2006) e cabras (CANAES et al, 2009) e observaram aumento dos níveis de cortisol, imunossupressão e aumento da frequência cardíaca e respiratória medidas lago após o desembarque. Para gado de corte, foram registradas perdas de peso após o transporte ligadas diretamente pelo manejo pré-transporte (FIKE;SPIRE, 2006;WARRISS, 1990).…”

Section: Transporte De Bovinos E Estresse De Viagemunclassified

Características de termorregulação de bovinos Nelore confinados utilizando dietas com óleos essenciais e submetidos ao estresse por transporte

Lemes¹

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The aim of this study is to evaluate the effect of supplementation with essential oils (EO) on the thermal regulation of cattle during the transport period and feedlot. The experiment was carried out in two phases: transport and feedlot. 48 Nellore animals were used, randomly outlined in 2 treatments in the first phase: protein supplement with essential oil (EO); and protein supplement without essential oil (WEO) and in the second phase in a 2 x 2 factorial arrangement (transport or not x supplemented with essential oil or not). In the first phase the animals were subjected to a trip of approximately 12 hours in cattle trucks and in the second phase the animals were confined for 99 days in individual stalls. The animals were weighed and body surface temperature (BST), respiratory rate (RR), rectal temperature (RT) was collected in both phases. Data loggers were installed in the trucks, as well as in the feedlot facilities, for collecting relative humidity, dry bulb temperature (DBT) and dew point temperature.Data on daily dry matter intake (DMI) were collected during the feedlot phase. In Phase 1, no EO effects were found under the thermoregulatory characteristics, however, it was possible to observe the physiological stress of the animals after the landing management, verifying lower BST and RT in animals not transported. In phase 2, likewise, no effects were observed between EO treatments. However, it was possible to observe a change in the DMI in relation to DBT, behaving in an inversely proportional way.

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Influência do transporte e mudança de local de manejo nas variáveis fisiológicas e produtivas de cabras Alpinas

Abstract: Influência do transporte e mudança de local de manejo nas variáveis fisiológicas e produtivas de cabras Alpinas

Cited by 11 publications

References 21 publications

Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Efeito de diferentes estressores na produção de leite de cabras Saanen e suas relações com estresse oxidativo na glândula mamária

Características de termorregulação de bovinos Nelore confinados utilizando dietas com óleos essenciais e submetidos ao estresse por transporte

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