Responses of Tswana goats to various lengths of water deprivation

The aim of this trial was to determine the water intake of Tswana goats and investigate the effects of short term water deprivation in summer or winter (6000 ml water offered either once every 72 h, 48 h, 24 h or ad libitum) on feed intake, dry matter digestibility, growth rate and health. Goats were fed a diet comprising 60% Cenchrus ciliaris hay and 40% Medicago sativa hay. Feed intake per kg metabolic weight was inversely related to water intake. Body weight gains decreased with longer watering intervals, rectal temperatures were unaffected but respiratory rate, packed cell volume, pulse rate, haemoglogin level and mean corpuscular haemoglobin concentration was highest with the 72 h watering interval. Feed intake and daily weight gains were higher in winter than summer, but animals drank more water in summer than in winter, and showed more signs of dehydration in summer. Dry matter digestibilities (%) were 66.8, 66.7, 64.2 and 65.2 for water intake intervals of ad lib, 24 h, 48 h and 72 h respectively; digestibilities of organic matter, crude protein and crude fibre followed the same trend. Urine output, faecal output per kg metabolic weight and faecal moisture content decreased with increased length of water deprivation. It was concluded that Tswana goats are well adapted to semi-arid zones and can be watered once in 72 h without severe dehydration. (South African Journal of Animal Science: 2000, 30(1): 87-91

Milk production of Tswana goats fed diets containing different levels of energy

The aim of this experiment was to characterize the milk yield of the Tswana goat of Botswana. Twenty-one Tswana goat does were allocated to one of three diets formulated to provide energy for maintenance and a milk yield of either 1.5 kg/d, 1.0 kg/d or 0.5 kg/d. Intake, milk yield and kid growth rate was monitored for 14 weeks. Dry matter intakes of up to 5% of body weight were recorded. Energy intake and milk yield differed between treatments (p < 0.01). Daily ME intake for the low, medium and high-energy diets was 1.01, 1.42 and 1.64 MJ ME/kg metabolic weight; the corresponding milk yields were 0.47, 0.53 and 0.72 kg/day. Kid birth weight ranged from 2.6 to 2.9 kg, and daily gains over the 14-week period were 95, 116 and 128 g/day for the low, medium and high energy diets respectively. Milk output accounted for 62% of the variation in kid growth rate. It was concluded that Tswana goats have the potential to respond to increasing levels of energy intake by increasing milk yield to relatively high levels. (South African Journal of Animal Science: 2000, 30(1): 77-81

Tannin Contents of Some Indigenous Browse Plants of Botswana

A study was carried out to evaluate the tannin content and crude protein degradation of leaves and twigs from indigenous browsable trees which provide feed for grazing livestock on natural rangelands of Botswana. These browses include the families Leguminosae (Acacias), Capparidaceae (Boscias), Combretaceae (Combretum) and Tiliaceae (Grewias). These were found to be of good nutritive value, with the leaves having a high content of crude protein (9 - 16%) and a wide range of dry matter digestibility (37 - 69.82%). The correlation between crude protein disappearance and tannin content was found to be negative (-0.582) and significant (P\u3c0.05)

Nutrient Composition of Napier Grass (Pennisetum purpureum) and Napier Grass Silages Made with Different Additives

Forage contributes about 73% and 95% of the diets of ruminants fattened on grain supplements and on natural ranges respectively (Sarwar & Nisa, 1998). Napier grass is one of the highest yielding tropical forage grasses and was shown to provide a good quality silage when it was supplemented with molasses, as the fermentation quality was not affected by the high storage temperature (40oC). The objectives of this study were to determine the chemical composition of silages when ensiled alone or mixed with additives

Resourcing Green Technologies through Smart Mineral Enterprise Development: A Case Analysis of Cobalt

Achieving the goals of the Paris Agreement requires the world to adopt ‘green technologies’ such as renewable energies and electric transportation at an unprecedented scale. While many countries have implemented policies to spur the adoption of such technologies, a lack of focus has been placed on the sourcing of minerals that are required as inputs. As a result, there is likely to be a significant deficit that may constrain the adoption of green technologies. In this report, we argue that a neglected area in addressing the mineral scarcity challenge is the private sector’s current trajectory for geological mineral exploration and the lack of innovative initiatives on material efficiency and recycling. We propose a Smart Mineral Enterprise Development (SMED), which entails a partnership between public and private entities to consider pathways whereby public sector data sharing on geology can be coupled with research innovations in the private sector both upstream and downstream of mineral supply. Just as smart energy grids harness efficiencies in electricity supply and demand through a dynamic process of communication, SMED processes can do the same for key technological bottlenecks in mineral supply. We focus on cobalt to highlight the bottlenecks; identify alternative supply sources based on current exploration and recycling technologies; propose ways in which the international legal framework could be adapted to promote investments in critical minerals; and consider ways by which the public sector can assist the private sector in developing a SMED process that would bring forth more efficient and effective entrepreneurial activity to meet our green technology needs

Resourcing Green Technologies through Smart Mineral Enterprise Development: A Case Analysis of Cobalt

Achieving the goals of the Paris Agreement requires the world to adopt ‘green technologies’ such as renewable energies and electric transportation at an unprecedented scale. While many countries have implemented policies to spur the adoption of such technologies, a lack of focus has been placed on the sourcing of minerals that are required as inputs. As a result, there is likely to be a significant deficit that may constrain the adoption of green technologies. In this report, we argue that a neglected area in addressing the mineral scarcity challenge is the private sector’s current trajectory for geological mineral exploration and the lack of innovative initiatives on material efficiency and recycling. We propose a Smart Mineral Enterprise Development (SMED), which entails a partnership between public and private entities to consider pathways whereby public sector data sharing on geology can be coupled with research innovations in the private sector both upstream and downstream of mineral supply. Just as smart energy grids harness efficiencies in electricity supply and demand through a dynamic process of communication, SMED processes can do the same for key technological bottlenecks in mineral supply. We focus on cobalt to highlight the bottlenecks; identify alternative supply sources based on current exploration and recycling technologies; propose ways in which the international legal framework could be adapted to promote investments in critical minerals; and consider ways by which the public sector can assist the private sector in developing a SMED process that would bring forth more efficient and effective entrepreneurial activity to meet our green technology needs

Assessment of Management and Breeding Practices among Indigenous Goat Farmers in a Tropical Humid Forest Zone

The study was undertaken to assess indigenous breeding practices and structure of back-yard goat farming in humid tropical forest zone. Pretested questionnaires and interview schedules were used to collect information from farmers in Ekiti, South-west Nigeria. Profile assessed were purpose, management, breeding and reproductive performances, disease prevalence, healthcare and challenges. Data were analyzed by descriptive statistics of SPSS, Version 20.0. Bucks run with does on free-scavenging system, mature sexually at 6–10 months, while mature does settle for bucks from about 7 months (52, 44, %). Main goals of farmers were flock multiplication, meatiness and coat color (24, 11, 6, %). Breeding was by natural random mating. Prolificacy was 1–4 kids but resistance to diseases was low. Selection practices were lowly engaged (7.5%), although based on health status and fecundity (19 and 13, %) for bucks and does respectively. Vaccination knowledge was high (77%), but mortality was also high. Drenching, castration and dehorning were performed (47, 24 and 5, %). Official intervention on breeding and improvement was nil. Challenges of farmers were stealing and accidents (46%), diseases and poisons (14%), lack of organized backyard sector, and the poor management system. Intensification of ethnoveterinary practices could promote improved healthcare in backyard goat farming

The burden of road traffic crashes, injuries and deaths in Africa:A systematic review and meta-analysis

Objective To estimate the burden of road traffic injuries and deaths for all road users and among different road user groups in Africa. Methods We searched MEDLINE, EMBASE, Global Health, Google Scholar, websites of African road safety agencies and organizations for registry- and population-based studies and reports on road traffic injury and death estimates in Africa, published between 1980 and 2015. Available data for all road users and by road user group were extracted and analysed. We conducted a random-effects meta-analysis and estimated pooled rates of road traffic injuries and deaths. Findings We identified 39 studies from 15 African countries. The estimated pooled rate for road traffic injury was 65.2 per 100000 population (95% confidence interval, CI: 60.8–69.5) and the death rate was 16.6 per 100 000 population (95% CI: 15.2–18.0). Road traffic injury rates increased from 40.7 per 100 000 population in the 1990s to 92.9 per 100 000 population between 2010 and 2015, while death rates decreased from 19.9 per 100 000 population in the 1990s to 9.3 per 100 000 population between 2010 and 2015. The highest road traffic death rate was among motorized four-wheeler occupants at 5.9 per 100 000 population (95% CI: 4.4–7.4), closely followed by pedestrians at 3.4 per 100 000 population (95% CI: 2.5–4.2). Conclusion The burden of road traffic injury and death is high in Africa. Since registry-based reports underestimate the burden, a systematic collation of road traffic injury and death data is needed to determine the true burden

Extracorporeal Life Support Organization (ELSO): guidelines for pediatric cardiac failure

These guidelines are applicable to neonates and children with cardiac failure as indication for extracorporeal life support. These guidelines address patient selection, management during extracorporeal membrane oxygenation, and pathways for weaning support or bridging to other therapies. Equally important issues, such as personnel, training, credentialing, resources, follow-up, reporting, and quality assurance, are addressed in other Extracorporeal Life Support Organization documents or are center-specific.Perioperative Medicine: Efficacy, Safety and Outcome (Anesthesiology/Intensive Care