Raising goats as adaptation process to long drought incidence at the Coastal Zone of Western Desert in Egypt

Aboul-Naga, Adel; Osman, Mona A.; Alary, Véronique; Hassan, Ferial; Daoud, Ibrahim; Tourrand, Jean–François

doi:10.1016/j.smallrumres.2014.02.009

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…The ER_NC can maintain ecological functions and provide a high adaptive capacity of wheat to climate change [ 55 ]. Moreover, the farmers in wheat sheep production zones cope with drought through harvesting rain [ 56 ] to reduce vulnerability. The ER_NC_S reflects the supply of effective rain that progressively decreases wheat climatic vulnerability.…”

Section: Discussionmentioning

confidence: 99%

Role of Livelihood Capital in Reducing Climatic Vulnerability: Insights of Australian Wheat from 1990–2010

Huai

2016

PLoS ONE

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In many agricultural countries, development of rural livelihood through increasing capital is a major regional policy to adapt to climate change. However, the role of livelihood capital in reducing climatic vulnerability is uncertain. This study assesses vulnerability and identifies the effects of common capital indicators on it, using Australian wheat as an example. We calculate exposure (a climate index) and sensitivity (a wheat failure index) to measure vulnerability and classify the resilient and sensitive cases, and express adaptive capacity through financial, human, natural, physical, and social capital indicators for 12 regions in the Australian wheat–sheep production zone from 1991–2010. We identify relationships between 12 indicators of five types of capital and vulnerability with t-tests and six logistic models considering the capital indicator itself, its first-order lag and its square as dependent variables to test the hypothesis that a high level of each capital metric results in low vulnerability. Through differing adaptive capacities between resilient and sensitive groups, we found that only four of the 12 (e.g., the access to finance, cash income level, total crop gross revenues, and family share of farm income) relate to vulnerability, which challenges the hypothesis that increasing capital reduces vulnerability. We conclude that further empirical reexaminations are required to test the relationships between capital measures and vulnerability under the sustainable livelihood framework (SLF).

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Section: Discussionmentioning

confidence: 99%

Role of Livelihood Capital in Reducing Climatic Vulnerability: Insights of Australian Wheat from 1990–2010

Huai

2016

PLoS ONE

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“…Goats are considered to be well adapted to hot and dry climates (Silanikove, 2000;Aboul-Naga et al, 2014), but the mechanisms of this adaptation, beyond specific digestive characteristics, are not well understood (Silanikove et al, 1993;Choshniak et al, 1995;Shamay et al, 2000;Maltz et al, 2009). The hypothalamic-pituitary-adrenal (HPA) axis is a critical neuroendocrine system involved in metabolism and adaptation, and circulating glucocorticoid hormone (GC) concentrations or the reactivity of the adrenal cortex to ACTH are often used as stress indicators (Mormede et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Seasonal effects on plasma cortisol concentrations in the Bedouin buck: circadian studies and response to ACTH

Chergui¹,

Mormède²,

Foury³

et al. 2017

Animal

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Our work aims at the exploration of cortisol secretion in the Bedouin goat, native to the Algerian Sahara desert, to understand the mechanisms of adaptation to extreme hot climates. In the present study, diurnal and seasonal variations of cortisol concentrations were measured in basal conditions, as well as the response to ACTH stimulation tests across seasons in bucks. The plasma concentrations of cortisol showed no diurnal cycle but a large variation across seasons. The highest levels occurred in summer and winter when the environmental conditions are at their extreme levels. The rectal temperature showed nychthemeral and seasonal variations, and BW was also different across seasons with highest values in summer and lowest in winter. The results obtained after administration of two doses (2 or 10 μg/kg BW) of synthetic ACTH to three different age groups (kids, adults and elderly animals) showed a strong increase in plasma cortisol concentrations under all conditions with maximum levels achieved between 15 and 120 min. The analysis of the area under the cortisol curve showed no significant difference between the responses to the two doses of ACTH and between age groups, but showed seasonal variations with the lowest response in autumn than in other seasons. We conclude that season significantly affects secretion of cortisol in both basal state and under ACTH stimulation. However, the variation of adrenal reactivity to ACTH is not sufficient to explain seasonal differences, and in particular the summer peak in basal circulating cortisol concentrations. Further research should focus on the respective contribution of environmental factors (such as day length, temperature, humidity) and the mechanisms involved in cortisol regulation.

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“…The Barki sheep are hardy, well adapted to the desert conditions (Aboul-Naga, 1976) and have distinct mothering ability (Galal et al, 1972). Animals have a remarkable ability to live in the arid regions, on sparse vegetation and limited water resources in the summer (Aboul Naga et al,1985) .When Barki animals relocated in the Nile Valley with better environmental and conditions, they performed less compared to the Ossimi and Rahmani sheep (Labban and Radwan, 1963).…”

Section: Major Egyptian Sheep Breeds: Barki Sheepmentioning

confidence: 99%

Review of Sheep and Goat Research and Development in Egypt Since the Forties: II-Phenotypic Characteristics, Production, and Reproduction Performance of Local Sheep Breeds

Aboul-Naga

Abdelsabour

2023

Journal of Animal and Poultry Production

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Egyptian local sheep breeds are widely spread over the country; raised mainly by smallholders and contribute significantly to their livelihood. Local breeds are well adapted to the prevailing hot dry conditions, and limited feed resources. They are fat-tailed sheep, open coarse wool and raised mainly for meat and lamb production. There are four major sheep breeds in Egypt; Rahmani sheep in north-Delta, Ossimi sheep in Mid-Egypt, Barki sheep in the Mediterranean coastal zone, and Saidi sheep in Upper Egypt. Minor local breeds are Fallahi, Wahati, Abudeleik, and Suhagi sheep located mainly in the south and in boarder governorates. Special and unique phenotypic characteristics are described for each breed. Production performance of the main local breeds include body weights, carcass quality, wool, and milk production, are tabulated as reported in the literature. Reproduction performance involving age at puberty, estrous, and breeding activity are discussed. Adaptability of local breeds to the prevailing subtropical environment, specially heat stress are presented. Key issues as the advantages of the local breeds, within the ongoing debate on breeding adapted law producing local animals, vs. high producing low tolerant exogenous breeds are discussed. Improvement programs for local sheep breeds requires sort of nucleus flock structure, as breeders association or village flocks, and the utilization of the recent findings of genomic analysis.

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Raising goats as adaptation process to long drought incidence at the Coastal Zone of Western Desert in Egypt

Cited by 10 publications

References 3 publications

Role of Livelihood Capital in Reducing Climatic Vulnerability: Insights of Australian Wheat from 1990–2010

Role of Livelihood Capital in Reducing Climatic Vulnerability: Insights of Australian Wheat from 1990–2010

Seasonal effects on plasma cortisol concentrations in the Bedouin buck: circadian studies and response to ACTH

Review of Sheep and Goat Research and Development in Egypt Since the Forties: II-Phenotypic Characteristics, Production, and Reproduction Performance of Local Sheep Breeds

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