The impact of swine welfare on some qualitative traits of meat and long cured animal derived products

The present dissertation collects the results of three different research trials which have the common aim to understand the effects of swine welfare (both at farm level and during transport) on the main fresh and dry-cured meat characteristics. The first trial was carried out in order to compare the effects of illumination regimes differing in light duration or light intensity on meat and ham quality of Italian heavy pigs. The results of this trial support the conclusion that, within a moderate range of light intensity and given an appropriate dark period for animal rest, an increase of light duration or intensity above the minimum mandatory levels has no negative impact on carcass composition, meat or long-cured hams quality. The second trial was designed with the aim to investigate the effects of water restriction on growth traits, animal welfare and meat and ham quality of liquid-fed heavy pigs. Overall, the parameters analyzed as concerns growth rate, behavioural traits, blood, as well as carcass, fresh meat and cured hams quality were not affected by the absence of fresh drinking water. However, since liquid feeding did not suppress drinker use or drinker manipulation in the experimental groups, water restriction does not appear to be an applicable method to obtain a reduction of water waste. The third trial, which was carried out in Canada, tested the effectiveness of water sprinkling market-weight pigs (115±10Kg BW) before and after transport in reducing the heat stress experienced under commercial transport conditions. Our results show that the water sprinkling protocol proposed may reduce heat stress during transport and improve pork quality, particularly in specific trailer compartments. This body of research supports the general conclusion that swine welfare could be improved in different scenarios through simple and cost-effective means, without negatively affecting the quality of the main animal-derived products.

Das deutsche Kriegsgefangenenwesen 1939 - 1945

Zusammenfassung: Die vorliegende Untersuchung zum deutschen Kriegsgefangenenwesen (KGW) im Zweiten Weltkrieg schließt eine wichtige Lücke innerhalb der geschichtswissenschaftlichen Forschungen zum Themenkreis der Kriegsgefangenschaft in deutschem Gewahrsam. Bisherige Studien (bis einschließlich 1997) behandeln vor allem sozial- und kulturgeschichtliche Aspekte der Kriegsgefangenen (Kgf.), der Lagergesellschaft und dem Alltag von Soldaten in Kriegsgefangenschaft. Der Verfasser indes legt mit seiner Magisterarbeit erstmals eine Organisations- und Strukturgeschichte des deutschen Kriegsgefangenenwesens von 1939 bis 1945 vor, welche fundamentale Grundlagen der deutschen militärischen Lagerorganisation und Verwaltung dokumentiert. So wird die Entwicklung von den Vorkriegsplanungen bis zum Kriegsende anhand der zentralen Dienststellen herausgearbeitet und im Kontext des Genfer Kriegsgefangenenabkommens von 1929 und völkerrechtlicher Implikationen gewichtet. Hiermit untrennbar verbundene Einflußnahmen nichtmilitärischer Stellen in die Entscheidungsgewalt der Streitkräfte im Heimatkriegsgebiet und in den Wehrmachtbefehlshaberbereichen werden nicht zuletzt auch anhand mehrerer Organigramme veranschaulicht. Zudem dokumentiert und analysiert die Untersuchung die im Kriegsverlauf stetig verschärften Maßnahmen zur Fluchtprävention und der konzertierten Fahndung nach geflohenen Kriegsgefangenen: Die Machterosion des Oberkommandos der Wehrmacht (OKW) zugunsten des Reichsführers-SS, des Reichssicherheitshauptamts und nicht zuletzt der Parteikanzlei der NSDAP wird so augenfällig. Trotz eminenter Schriftgutverluste kann der Verfasser vor allem anhand einer nahezu vollständig erhaltenen Schlüsselquelle die Stellenbesetzung und Organisationsstruktur der mit Kriegsgefangenenfragen befassten Stellen im OKW rekonstruieren. Die Auswertung dieser Sammelmitteilungen / Befehlssammlung für das Kriegsgefangenenwesen sowie an anderer Stelle überlieferter Organisationsbefehle ermöglicht wichtige Änderungen am derzeitigen Forschungsstand. Darüber hinaus beschäftigt sich die vorliegende Untersuchung mit dem Arbeitseinsatz Kriegsgefangener in der deutschen Wirtschaft als in der zweiten Kriegshälfte zentralem Element der Kriegsgefangenschaft. Außerdem wird beleuchtet, welche politischen, (rassen)ideologischen oder reziprok konnotierten Faktoren den Stellenwert gefangener Soldaten unterschiedlicher Nationalität innerhalb der Gefangenenhierarchie im deutschen Kriegsgefangenenwesen bestimmten. Inhalt: 1. Einführung; 2. Die Entwicklung des Kriegsvölkerrechts und das Genfer Kriegsgefangenenabkommen von 1929; 3. Einleitende Bemerkungen zum deutschen Kriegsgefangenenwesen: Quellenlage, Grundlagen; 4. Organisationsstruktur und Aufgaben des KGW: Zuständigkeiten für Kgf. in OKW und OKH, Abt. Wehrmachtverluste und Kriegsgefangene, der General z.b.V. für das KGW 1939 bis Ende 1941, Allgemeine und Organisationsabteilung seit Januar 1942, Generalinspekteur und Inspekteur des KGW von Juli 1943 bis Oktober 1944, das Kriegsgefangenenwesen unter Himmler seit Oktober 1944; 5. Die Kriegsgefangenenlager: Lagertypen, Anzahl und Verwendung, die Gesamtzahl Kgf. und Belegstärken ausgewählter Lager; 6. Richtlinien für KGL: Die Sammelmitteilungen / Befehlssammlung für das KGW, Lagerorganisation und Behandlung Kriegsgefangener; 7. Die Post der Kriegsgefangenen: Tätigkeit von Auslandsbriefprüfstelle, Abwehr III Referat Kgf. und Abwehrstellen der Wehrkreise, Vorgaben für Postüberwachung und Stimmungsberichte der Asten, Befehle zur Kgf-Post und Kooperation mit Hilfsorganisationen und Schutzmächten; 8. Fluchtprävention: Bestimmungen und Maßnahmen zur Fluchtvereitelung, der Fluchterlass vom 22.09.1942, der Sonderfahndungsplan der Sicherheitspolizei und des SD vom 28.09.1942, Erlass zur Kriegsfahndung vom 5.12.1942, der Fluchterlaß vom 02.07.1943, der Erlaß zur Mitarbeit NSDAP bei Groß- und Kriegsfahndungen vom 10.07.1943, Schulung zur Fluchtprävention auf Wehrkreisebene 1944, Preisausschreiben "Wie verhindere ich Fluchten?" vom 09.04.1945, Anwerbung von V-Leuten durch die Abwehr; 9. Arbeitseinsatz Kriegsgefangener in der deutschen Wirtschaft und beteiligte Stellen; 10. Der Status Kriegsgefangener unterschiedlicher Nationalitäten im Vergleich; 11. Schluss

Eine Million Algerier lernen im 20. Jahrhundert zu leben. Umsiedlungslager und Zwangsmodernisierung im Algerienkrieg 1954–1962

Als eines der erstaunlichsten Merkmale des algerisch-französischen Unabhängigkeitskriegs 1954-1962 darf die Kombination von militärischer Aufstandsbekämpfung und zivilen Reformprojekten gelten. Diese Verschränkung lässt sich an keinem Aspekt dieses Krieges so deutlich beobachten wie an der französischen Umsiedlungspolitik. Bis zu drei Millionen Menschen wurden während des Krieges von der französischen Armee gewaltsam aus ihren Dörfern vertreiben und in eigens angelegte Sammellager, die «camps de regroupement», umgesiedelt. Was als rein militärische Maßnahme begann, entwickelte sich schnell zu einem gewaltigen ländlichen Entwicklungsprogramm. Durch das Versprechen einer umfassenden Modernisierung aller Lebensbereiche im Schnellverfahren sollten die Insassen der Lager zu loyalen Anhängern des Projekts eines französischen Algeriens gemacht werden. Die «camps de regroupement» lassen sich als Modernisierungslaboratorien beschreiben, in denen sich scheinbar widersprüchliche Elemente wie Entwicklungshilfe mit äußerst rigider Bevölkerungskontrolle und totalitär anmutenden Maßnahmen des social engineering zu einem einzigartigen Ensemble verbanden. [ABSTRACT FROM AUTHOR]

Aleatory Sovereignty and the Rule of Sensitive Spaces

Addressing life in borders and refugee camps requires understanding the way these spaces are ruled, the kinds of problems rule poses for the people who live there, and the abilities of inhabitants to remake their own lives. Recent literature on such spaces has been influenced by Agamben's notion of sovereignty, which reduces these spaces and their residents to abstractions. We propose an alternate framework focused on what we call aleatory sovereignty, or rule by chance. This allows us to see camps and borders not only as the outcomes of humanitarian projects but also of anxieties about governance and rule; to see their inhabitants not only as abject recipients of aid, but also as individuals who make decisions and choices in complex conditions; and to show that while the outcome of projects within such spaces is often unpredictable, the assumptions that undergird such projects create regular cycles of implementation and failure.

Panel 7: Survival Strategies

Panel 7: Survival Strategies Moriya Rachmani, Ben-Gurion University, Israel: “Rituals in Concentration and Extermination Camps and Near Death Situations: Existence, Order, Identity” Download paper (login required) Barbara Hutzelmann, Ludwig-Maximilians University, Germany: “‘I Didn’t Want to Die.’ Jewish Children’s Strategies of Survival in Slovakia: Chances and Limitations" Download paper (login required) Liviu Carare, The Romanian Academy “George Bariţiu” Institute of History, Cluj-Napoca, Romania: "Jews of Czernowitz (1941-1942): Murder, Ghettoization and Deportation" Download paper (login required) Chair: Alexis Herr and Adara Goldberg, Clark UniversityComment: Johannes Lang, Danish Institute for International Studies, Copenhagen

Analgesic activity of a non-peptide imidazolidinedione somatostatin agonist: in vitro and in vivo studies in rat

Several lines of evidence support an important role for somatostatin receptors (SSTRs) in pain modulation. The therapeutic use of established SSTR peptide agonists for this indication is limited by their broad range of effects, need for intrathecal delivery, and short half-life. Therefore, the goal of the present study was to investigate the analgesic effect of SCR007, a new, highly selective SSTR2 non-peptide agonist. Behavioral studies demonstrated that paw withdrawal latencies to heat were significantly increased following intraplantar SCR007. Furthermore, both intraperitoneal and intraplantar injection of SCR007 significantly reduced formalin- and capsaicin-induced flinching and lifting/licking nociceptive behaviors. Recordings from nociceptors using an in vitro glabrous skin-nerve preparation showed that SCR007 reduced heat responses in a dose-dependent fashion, bradykinin-induced excitation, heat sensitization and capsaicin-induced excitation. In both the behavioral and single fiber studies, the SCR007 effects were reversed by the SSTR antagonist cyclo-somatostatin, demonstrating receptor specificity. In the single fiber studies, the opioid antagonist naloxone did not reverse SCR007-induced anti-nociception suggesting that SCR007 did not exert its effects through activation of opioid receptors. Analysis of cAMP/protein kinase A (PKA) involvement demonstrated that SCR007 prevented forskolin- and Sp-8-Br-cAMPS (a PKA activator)-induced heat sensitization, supporting the hypothesis that SCR007-induced inhibition could involve a down-regulation of the cAMP/PKA pathway. These data provide several lines of evidence that the non-peptide imidazolidinedione SSTR2 agonist SCR007 is a promising anti-nociceptive and analgesic agent for the treatment of pain of peripheral and/or central origin.

High incidence of optic disc swelling at very high altitudes

OBJECTIVES: To determine the incidence of optic disc swelling as a possible indicator of cerebral edema in a large group of healthy mountaineers exposed to very high altitudes and to correlate these findings with various clinical and environmental factors and occurrence of acute mountain sickness and high-altitude cerebral edema. METHODS: This multidisciplinary, prospective, observational cohort study was performed in 2005 within the scope of a medical research expedition to Muztagh Ata (7546 m [24,751 ft]) in Western Xinjiang Province, China. Twenty-seven healthy mountaineers aged 26 to 62 years participated. Medical examinations were performed in Switzerland 1 month before and 4 1/2 months after the expedition. Ophthalmologic examinations were performed at 4 high camps (maximum elevation, 6865 m [22,517 ft]). Optic disc status was documented using digital photography. Further assessments included arterial oxygen saturation and cerebral acute mountain sickness scores. RESULTS: Sixteen of 27 study subjects (59%) exhibited optic disc swelling during their stay at high altitudes, with complete regression on return to lowlands. Significant correlation was noted between optic disc swelling and lower arterial oxygen saturation (odds ratio, 0.86 per percentage of arterial oxygen saturation; 95% confidence interval, 0.81-0.92; P < .001), younger age (odds ratio, 0.95 per year; 95% confidence interval, 0.90-0.99; P = .03), and higher cerebral acute mountain sickness scores (odds ratio, 2.32 per 0.1 point; 95% confidence interval, 1.48-3.63; P < .001). CONCLUSION: Optic disc swelling occurs frequently in high-altitude climbers and is correlated with peripheral oxygen saturation and symptoms of acute mountain sickness. It is most likely the result of hypoxia-induced brain volume increase.

Cold-Start Emissions testing of Snowmobiles Using Ethanol and Gasoline

Increasing prices for fuel with depletion and instability in foreign oil imports has driven the importance for using alternative and renewable fuels. The alternative fuels such as ethanol, methanol, butyl alcohol, and natural gas are of interest to be used to relieve some of the dependence on oil for transportation. The renewable fuel, ethanol which is made from the sugars of corn, has been used widely in fuel for vehicles in the United States because of its unique qualities. As with any renewable fuel, ethanol has many advantages but also has disadvantages. Cold startability of engines is one area of concern when using ethanol blended fuel. This research was focused on the cold startability of snowmobiles at ambient temperatures of 20 °F, 0 °F, and -20 °F. The tests were performed in a modified 48 foot refrigerated trailer which was retrofitted for the purpose of cold-start tests. Pure gasoline (E0) was used as a baseline test. A splash blended ethanol and gasoline mixture (E15, 15% ethanol and 85% gasoline by volume) was then tested and compared to the E0 fuel. Four different types of snowmobiles were used for the testing including a Yamaha FX Nytro RTX four-stroke, Ski-doo MX Z TNT 600 E-TEC direct injected two stroke, Polaris 800 Rush semi-direct injected two-stroke, and an Arctic Cat F570 carbureted two-stroke. All of the snowmobiles operate on open loop systems which means there was no compensation for the change in fuel properties. Emissions were sampled using a Sensors Inc. Semtech DS five gas emissions analyzer and engine data was recoded using AIM Racing Data Power EVO3 Pro and EVO4 systems. The recorded raw exhaust emissions included carbon monoxide (CO), carbon dioxide (CO2), total hydrocarbons (THC), and oxygen (O2). To help explain the trends in the emissions data, engine parameters were also recorded. The EVO equipment was installed on each vehicle to record the following parameters: engine speed, exhaust gas temperature, head temperature, coolant temperature, and test cell air temperature. At least three consistent tests to ensure repeatability were taken at each fuel and temperature combination so a total of 18 valid tests were taken on each snowmobile. The snowmobiles were run at operating temperature to clear any excess fuel in the engine crankcase before each cold-start test. The trends from switching from E0 to E15 were different for each snowmobile as they all employ different engine technologies. The Yamaha snowmobile (four-stroke EFI) achieved higher levels of CO2 with lower CO and THC emissions on E15. Engine speeds were fairly consistent between fuels but the average engine speeds were increased as the temperatures decreased. The average exhaust gas temperature increased from 1.3-1.8% for the E15 compared to E0 due to enleanment. For the Ski-doo snowmobile (direct injected two-stroke) only slight differences were noted when switching from E0 to E15. This could possibly be due to the lean of stoichiometric operation of the engine at idle. The CO2 emissions decreased slightly at 20 °F and 0 °F for E15 fuel with a small difference at -20 °F. Almost no change in CO or THC emissions was noted for all temperatures. The only significant difference in the engine data observed was the exhaust gas temperature which decreased with E15. The Polaris snowmobile (semi-direct injected two-stroke) had similar raw exhaust emissions for each of the two fuels. This was probably due to changing a resistor when using E15 which changed the fuel map for an ethanol mixture (E10 vs. E0). This snowmobile operates at a rich condition which caused the engine to emit higher values of CO than CO2 along with exceeding the THC analyzer range at idle. The engine parameters and emissions did not increase or decrease significantly with decreasing temperature. The average idle engine speed did increase as the ambient temperature decreased. The Arctic Cat snowmobile (carbureted two-stroke) was equipped with a choke lever to assist cold-starts. The choke was operated in the same manor for both fuels. Lower levels of CO emissions with E15 fuel were observed yet the THC emissions exceeded the analyzer range. The engine had a slightly lower speed with E15.

Effect of ascent protocol on acute mountain sickness and success at Muztagh Ata, 7546 m

Bloch, Konrad E., Alexander J. Turk, Marco Maggiorini, Thomas Hess, Tobias Merz, Martina M. Bosch, Daniel Barthelmes, Urs Hefti, Jacqueline Pichler, Oliver Senn, and Otto D. Schoch. Effect of ascent protocol on acute mountain sickness and success at Muztagh Ata, 7546 m. High Alt. Med. Biol. 10:25-32, 2009.-Data on acclimatization during expedition-style climbing to > 5000 m are scant. We evaluated the hypothesis that minor differences in ascent protocol influence acute mountain sickness (AMS) symptoms and mountaineering success in climbers to Muztagh Ata (7546 m), Western China. We performed a randomized, controlled trial during a high altitude medical research expedition to Muztagh Ata. Thirty-four healthy mountaineers (mean age 45 yr, 7 women) were randomized to follow one of two protocols, ascending within 15 or 19 days to the summit of Muztagh Ata at 7546 m, respectively. The main outcome measures, AMS symptom scores and the number of proceeding climbers, were assessed daily. Mean +/- SD AMS-C scores of 16 climbers randomized to slow ascent were 0.06 +/- 0.18, 0.26 +/- 0.08, 0.41 +/- 0.45, 0.53 +/- 0.77 at camps I (5533 m), II (6265 m), III (6865 m), and the summit (7546 m), respectively. Corresponding values in 18 climbers randomized to fast ascent were significantly higher: 0.17 +/- 0.23, 0.43 +/- 0.75, 0.49 +/- 0.36, and 0.69 +/- 0.54 (p < 0.008, vs. slow ascent in regression analysis accounting for weather-related protocol deviation). Climbers randomized to slow ascent were able to ascend according to the protocol without AMS for significantly more days than climbers randomized to fast ascent (p = 0.04, Kaplan-Meier analysis). More climbers randomized to slow ascent were successful in reaching the highest camp at 6865 m without AMS (odds ratio 9.5; 95% confidence interval 1.02 to 89). In climbers ascending to very high altitudes, differences of a few days in acclimatization have a significant impact on symptom severity, the prevalence of AMS, and mountaineering success. ClinicalTrials.gov Identifier NCT00603122.

Practical, Pluggable Types for a Dynamic Language

Most languages fall into one of two camps: either they adopt a unique, static type system, or they abandon static type-checks for run-time checks. Pluggable types blur this division by (i) making static type systems optional, and (ii) supporting a choice of type systems for reasoning about different kinds of static properties. Dynamic languages can then benefit from static-checking without sacrificing dynamic features or committing to a unique, static type system. But the overhead of adopting pluggable types can be very high, especially if all existing code must be decorated with type annotations before any type-checking can be performed. We propose a practical and pragmatic approach to introduce pluggable type systems to dynamic languages. First of all, only annotated code is type-checked. Second, limited type inference is performed on unannotated code to reduce the number of reported errors. Finally, external annotations can be used to type third-party code. We present Typeplug, a Smalltalk implementation of our framework, and report on experience applying the framework to three different pluggable type systems.

Innovative Interventions with Alcohol Problems in Rural Areas: An Indian Experience and its Relevance to Rural America

Conventional interventions used to address the complex problems of substance abuse call for multifaceted approaches reflecting the diverse backgrounds of affected populations. In this paper the rural context is highlighted as an asset in contributing to sustainable recovery from alcohol problems. Against the background of comparing two international rural contexts and recognizing shared identities, a case is made for transfer of knowledge east to west. The success elements of a unique approach to intervention with problems associated with excessive drinking in rural areas of South India, based on the experiences of Community-Based Rehabilitation camps is described. Spanning two decades of systematic implementation, the camps utilize existing community resources for planning, execution, and follow-up of treatment while simultaneously creating greater awareness about alcohol abuse through community education. After a critical examination of prevailing treatment options for problem drinking in rural America, inter-country analysis reveals contextual similarities between rural America and rural South India based on community-orientation, cost-containment, and social capital formation with implications for rural social work intervention with alcohol problems in the United States.

Transformations in French Anti-Semitism?

The increase in the number of anti-Semitic acts since the start of the Second Intifada has sparked off a broad debate on the return of anti-Semitism in France. This article focuses on the question whether this anti-Semitism is still based on the alleged superiority of the Aryan race as in the time of Nazism, or if it represents the birth of a “new Judeophobia” that is more based on anti-Zionism and the polemical mixing of “Jews,” “Israelis,” and “Zionists.” One supposed effect of this transformation is that anti-Semitism is in the process of changing camps and migrating from the extreme right to the extreme left of the political arena, to the “altermondialistes,” the communists, and the “neo-Trotskyists.” The article provides answers to the following questions: Are anti-Jewish views on the increase in France today? Do these opinions correlate with negative opinions of other minorities, notably Maghrebians and Muslims? Do they tend to develop among voters and sympathizers with the extreme right or on the extreme left of the political spectrum? And how are they related to opinions concerning Zionism and the Israeli-Palestinian conflict? My evaluation of the transformations in French anti-Semitism relies on two types of data. The first is police and gendarmerie statistics published by the National Consultative Committee on Human Rights (CNCDH), which is charged with presenting the prime minister with an annual report on the struggle against racism and xenophobia in France. The other is data from surveys, notably surveys commissioned by CNCDH for its annual report and surveys conducted at the Center for Political Research (CEVIPOF) at Sciences Po (Paris Institute for Political Research). The data show that anti-Semitic opinions follow a different logic from acts, that the social, cultural, and political profile of anti-Semites remains very close to that of other types of racists, and that anti-Zionism and anti-Semitism do not overlap exactly.

Le temps des hommes doubles. Les arrangements face à l’occupation, de la Révolution française à la guerre de 1870

Le temps des hommes doubles : Louis Aragon a désigné ainsi la séparation voire l’opposition entre l’homme social et l’homme privé dans la société capitaliste. Pour les auteurs réunis ici, il s’agit plutôt de signifier qu’au temps de la souveraineté nationale en armes, dès lors que sont plus rigoureusement assignées aux soldats et aux citoyens à la fois une « identité » et une « cause » supposées dépasser leur état civil et leurs intérêts particuliers, l’occupation militaire multiplie, dans la recherche d’accommodements entre les deux camps, les tensions et les combinaisons possibles entre fonctions ou statuts publics, sociabilités et influences locales, opinions et besoins. Pour caractériser les évolutions qui ont eu lieu entre les guerres déclarées par la France à l’Autriche en 1792 et à la Prusse en 1870, le présent livre met l’accent sur trois thèmes. Il traite d’abord des enjeux politiques et administratifs de l’occupation, parmi lesquels la neutralité, son devenir en tant que concept dans les relations internationales, et le positionnement des États neutres dans des conflits où l’on s’efforce de mobiliser aussi les opinions publiques. L’attention se porte ensuite sur les armées occupantes. Quelle que soit la part d’idéologie que l’autorité politique introduit dans leurs missions, la première de ces missions est de garantir leur propre sécurité. La recherche des accommodements ou le constat de l’extrême difficulté d’en trouver sont enfin abordés du point de vue des sociétés en proie à l’occupation. Dans ces situations où le présent peut être vécu et interprété en fonction d’une mémoire individuelle et collective d’expériences antérieures, le rôle joué par les occupants ne se réduit pas à la brutalité de la soldatesque et à l’exploitation économique.

The International Trans-Antarctic Scientific Expedition (ITASE): An Overview

From its original formulation in 1990 the International Trans-Antarctic Scientific Expedition (ITASE) has had as its primary aim the collection and interpretation of a continent-wide array of environmental parameters assembled through the coordinated efforts of scientists from several nations. ITASE offers the ground-based opportunities of traditional-style traverse travel coupled with the modern technology of CPS, crevasse detecting radar, satellite communications and multidisciplinary research. By operating predominantly in the mode of an oversnow traverse, ITASE offers scientists the opportunity to experience the dynamic range of the Antarctic environment. ITASE also offers an important interactive venue for research similar to that afforded by oceanographic research vessels and large polar field camps, without the cost of the former or the lack of mobility of the latter. More importantly, the combination of disciplines represented by ITASE provides a unique, multidimensional (space and time) view of the ice sheet and its history. ITASE has now collected > 20 000 km of snow radar, recovered more than 240 firn/ice cores (total length 7000m), remotely penetrated to similar to 4000m into the ice sheet, and sampled the atmosphere to heights of > 20 km.

Estimating population and livestock density of mobile pastoralists and sedentary settlements in the southeastern Lake Chad area

Mobile pastoralists provide major contributions to the gross domestic product in Chad, but little information is available regarding their demography. The Lake Chad area population is increasing, resulting in competition for scarce land and water resources. For the first time, the density of people and animals from mobile and sedentary populations was assessed using randomly defined sampling areas. Four sampling rounds were conducted over two years in the same areas to show population density dynamics. We identified 42 villages of sedentary communities in the sampling zones; 11 (in 2010) and 16 (in 2011) mobile pastoralist camps at the beginning of the dry season and 34 (in 2011) and 30 (in 2012) camps at the end of the dry season. A mean of 64.0 people per km2 (95% confidence interval, 20.3-107.8) were estimated to live in sedentary villages. In the mobile communities, we found 5.9 people per km2 at the beginning and 17.5 people per km2 at the end of the dry season. We recorded per km2 on average 21.0 cattle and 31.6 small ruminants in the sedentary villages and 66.1 cattle and 102.5 small ruminants in the mobile communities, which amounts to a mean of 86.6 tropical livestock units during the dry season. These numbers exceed, by up to five times, the published carrying capacities for similar Sahelian zones. Our results underline the need for a new institutional framework. Improved land use management must equally consider the needs of mobile communities and sedentary populations.