Physiological and lactation responses of Egyptian dairy Baladi goats to natural thermal stress under subtropical environmental conditions

El‐Tarabany, Mahmoud S.; El-Tarabany, Akram A.; Atta, Mostafa A.

doi:10.1007/s00484-016-1191-2

Cited by 59 publications

(26 citation statements)

References 44 publications

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“…In recent years, interest in commercializing goat milk production for human consumption and cheese manufacture is attracting producers due to growing demand (Mestawet et al, 2012, El-Tarabany et al, 2016). In the current study, the average daily-MY in Baladi goats was comparable to former trials, where the peak was attained at the early stage of lactation, and then a steady decline was observed thereafter until the end of lactation.…”

Section: Discussionmentioning

confidence: 99%

Impact of lactation stage on milk composition and blood biochemical and hematological parameters of dairy Baladi goats

El-Tarabany

Roushdy

2018

Saudi Journal of Biological Sciences

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The objective of this study was to elucidate the impact of lactation stage on milk composition, hematological and biochemical parameters of dairy Baladi goats under Egyptian conditions. Forty-eight Baladi goats (32.8 ± 2.9 kg of BW) were enrolled in the current study. The lactation period has been divided into three stages; early (DIM less than 80 days), Mid (DIM 80–140 days), and Late (DIM over 140 days). Baladi goats had decreased daily-MY at a rate of 18.4% and 31.9% at mid and late stages of lactation, compared with early stage, respectively (p = 0.001). Furthermore, lactose% decreased significantly with progress of lactation (p = 0.017). Total solids%, however, decreased significantly at early stage of lactation in comparison with mid and late stages (p = 0.022). On the contrary, no significant differences were found in protein, fat and SNF percentages at different stages of lactation (p = 0.836, 0.625 and 0.281, respectively). Serum glucose and total protein were significantly reduced at late stage of lactation in comparison with early and mid stages (p = 0.001 and 0.001, respectively). On the contrary, no significant differences were found for erythrocytes count, hemoglobin, serum cholesterol, catalase and triiodothyronine at different stages of lactation. There were high and positive correlations between daily-MY and serum total protein (r = 0.87, P < 0.01) and triiodothyronine (r = 0.41, P < 0.01). However, negative estimates were reported between daily-MY and triglycerides (r = −0.55, P < 0.01) and cholesterol (r = −0.33, P < 0.05). Our results indicate that dairy Baladi goats produce milk with relatively stable protein, fat and solid not fat (SNF) contents at the different stages of lactation, encouraging the continuous utilization of their milk in processing. Also, dairy Baladi goats seem able to maintain the most vital biochemical parameters.

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Section: Discussionmentioning

confidence: 99%

Impact of lactation stage on milk composition and blood biochemical and hematological parameters of dairy Baladi goats

El-Tarabany

Roushdy

2018

Saudi Journal of Biological Sciences

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“…Sevi et al (2001) have reported that the provision of shade helped minimizing the impact of thermal stress in the immune function and udder health of ewes. High environmental temperatures can lead to reduced leucocyte counts in sheep (El-Tarabany, El-Tarabany, & Atta, 2017). Also, in such cases, leucocytes have impaired function (e.g.…”

Section: Climatological Factorsmentioning

confidence: 99%

Predisposing factors for bacterial mastitis in ewes

Vasileiou

Mavrogianni

Petinaki

et al. 2019

Reprod Domestic Animals

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Objective of this review paper is the appraisal of predisposing factors for bacterial mastitis in ewes. Factors that predispose ewes to mastitis can be classified into non‐animal‐related factors (environmental and climatological factors, housing, nutrition, milking practices) and animal‐related factors (anatomic, genetic, litter size—ethological factors, number and stage of lactation period, health problems). There are clear management—environment—animal interactions in mastitis development in ewes, which underline its multifactorial nature. Research and studies regarding risk factors are important, in order to develop strategies for their elimination, control or correction. Control measures for bacterial mastitis, which attempt to eliminate predisposing factors for infection, can thus be developed and implemented.

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“…Among the environmental variables affecting animals, heat stress is one of the factors making animal production challenging in many parts of the world (El-Tarabany et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Review: Adaptation of animals to heat stress

Sejian

Bhatta

Gaughan

et al. 2018

Animal

318

206

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Livestock plays an important role in the global economy. Climate change effects are not only limited to crop production, but also affect livestock production, for example reduced milk yields and milk quality, reduced meat production and reduced fertility. Therefore, livestock-based food security is threatened in many parts of the world. Furthermore, multiple stressors are a common phenomenon in many environments, and are likely to increase due to climate change. Among these stresses, heat stress appears to be the major factor which negatively influences livestock production. Hence, it is critical to identify agro-ecological zone-specific climate resilient thermo-tolerant animals to sustain livestock production. Livestock responds to the changing environments by altering their phenotypic and physiological characters. Therefore, survivability of the animal often depends on its ability to cope with or adapt to the existing conditions. So to sustain livestock production in an environment challenged by climate change, the animals must be genetically suitable and have the ability to survive in diversified environments. Biological markers or biomarkers indicate the biological states or alterations in expression pattern of genes or state of protein that serve as a reference point in breeding for the genetic improvement of livestock. Conventionally, identification of animals with superior genetic traits that were economically beneficial was the fundamental reason for identifying biomarkers in animals. Furthermore, compared with the behavioural, morphological or physiological responses in animals, the genetic markers are important because of the possibility of finding a solution to animal adaptability to climate change.

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Physiological and lactation responses of Egyptian dairy Baladi goats to natural thermal stress under subtropical environmental conditions

Cited by 59 publications

References 44 publications

Impact of lactation stage on milk composition and blood biochemical and hematological parameters of dairy Baladi goats

Impact of lactation stage on milk composition and blood biochemical and hematological parameters of dairy Baladi goats

Predisposing factors for bacterial mastitis in ewes

Review: Adaptation of animals to heat stress

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