Contributions to International Conferences



H.J. Schwartz, A.S. Qureshi (2019)
Video presentation: Herd growth and Population Development in Camels (Camelus dromedarius)
- A Neglected Research Agenda?
National Camel Conference, Faisalabad, Pakistan.

H.J.Schwartz (2016)
Oral Presentation: Ninety Years of Pastoralists Land Use Change
- A case study from Northern Kenya
Poster: Herd Growth and Population Development in Camels
(Camelus dromedarius) - A Neglected Research Agenda.
Tropentag 2016, Vienna, Austria.

H.J. Schwartz ( 2015)
The Representation of the Camel in Western Visual Arts over 2000 years.
Camel Conference, SOAS, School of Oriental and African Studies,
University of London, UK.

M. Pereira, D. J.Bungenstab, R. G. Almeida and H.J. Schwartz (2014)
An Agro-Silvo-Pastoral Production System in Brazil
Tropentag 2014, Prague, Czech Republic.

D. J.Bungenstab, R. G. Almeida and H.J. Schwartz (2014)
Abstract: Integrated Crop-Livestock-Forestry Systems: A Brazilian Experience for Sustainable Farming.
Tropentag 2014, Prague, Czech Republic.

D. J. Bungenstab, G. R.O. Menezes, C. R. Feldkamp, H.J. Schwartz, M. Pereira (2014)
Abstract: Environmental Effiency Indexes for Cattle Improvement.
Tropentag 2014, Prague, Czech Republic.

H.J. Schwartz (2013)
Global development of camel populations, production systems, and systems productivity
International Camel Conference-2013 in Bahawalpur, Pakistan.

H.J. Schwartz (2012)
Feeding preferences of one-humped Camels Camelus dromedarius on a semi-arid thornbush savannah
in East Africa adaptive advantages in view of increasing aridity of the environment.
3rd International Conference of ISOCARD, Muscat, Oman.

H.J. Schwartz (2010)
Global Climate Change and Livestock Production: Culprit or Victim?
33 Congreso Argentino de Produccion Animal, Comarca Viedma, Patagones, Argentina.

H.J. Schwartz (2010)
Water Footprint of Beef Production - Critical Review of Current Approaches.
33 Congreso Argentino de Produccion Animal, Comarca Viedma, Patagones, Argentina.

H.J. Schwartz, C.R. Feldkamp, D.J. Bungenstab (2009)
Energy efficiency, methane output, required carbon sequestration area and water productivity in extensive
and semi-intensive beef production - a comparison of ecological currencies.
International Conference on: "The Integration of Sustainable Agriculture and Rural Development in the Context
of Climate Change, the Energy Crisis and Food Insecurity", Agadir, Morocco.

H.J. Schwartz (2009)
Forage Trees and Shrubs - Integrating Livestock Production and Landscape Rehabilitation.
World Congress of Agroforestry, Nairobi, Kenya.

M.Walsh, H.J. Schwartz (2009)
Managing Ecosystem Services in Agricultural Systems: the African Challenges.
World Congress of Agroforestry, Nairobi, Kenya.

H.J. Schwartz (2009)
Water Footprint of Beef Production - Critical Review of Current Approaches.
International Conference on Water Policy, Prague, Czechia.

M.G.H. Walsh, H. J. Schwartz, I. Hary, (2006)
A rapid appraisal of land use potential of degraded range lands in south-west Uganda
using satellite imagery and decision trees.
International Conference on Agricultural Engineering: Issues and Strategies,
University of Agriculture, Faisalabad, Pakistan.

A.Broglia, F. Mohamed Said, H.J. Schwartz (2004)
Camel phenotypes in Sahrawi refugee camps, Tinduf (Algeria).
VSF Annual meeting and Symposium on "Healthy Animals - Healthy people", Solothurn, Switzerland.

H.J. Schwartz, & M. Reissmann (2002)
Breed identification in camels - a useful tool to improve productivity through selection and crossbreeding?
International Workshop on: Camel Research and Development. University of Gezira, Wad Medani, Sudan.

H.J. Schwartz, & M. Reissmann (2002)
Breed identification in camels - a useful tool to improve productivity through selection and crossbreeding?
International Workshop on: Camel Research and Development. University of Gezira, Wad Medani, Sudan.

H.J. Schwartz, (2002)
The dromedary (Camelus dromedarius)as a draught and pack animal in semi-arid farming systems.
53rd Annual Meeting of the EAAP 2002, Cairo, Egypt.

H.J. Schwartz, (2002)
Elbeökologie: regionale Untersuchungen zu einem grenzüberschreitenden Problem.
Wiss. Konferenz; 40 Jahre Zusammenarbeit und 10 Jahre Universitätsvertrag zwischen der Tschechischen
Agraruniversität Prag TAU und der Humboldt-Universität zu Berlin,
Prag-Suchdol, Tschechien.

H.J. Schwartz, (1996)
Extensification of small ruminant production in the new federal states of Germany: Causes, trends and perspectives.
47th Annual Meeting of the EAAP 1996, Lillehammer, Norway.

P. O'Reagain, H.J., Schwartz (1995)
Dietary selection and foraging strategies of animals on rangeland - Coping with spatial and temporal variability.
In: M.Journet, M.H.Farce, M.Th. Riez, C. Demarquilly (eds), Recent developments in the nutrition of herbivores.
Proceedings of the IVth International Symposium on the Nutrition of Herbivores, 407-423,
INRA Editions, Paris, France.

V.Manzke, H.Münchow, B.Betzin, L.Hasselmann, H.J.Schwartz (1994).
Effects of nutrient restriction and realimentation in different goat breeds (Abstract).
Proceedings of an International Symposium on "Wild and domestic ruminants in extensive land use systems",
Humboldt-Universität zu Berlin, Ökologische Hefte Nr. 2, (1995).

H.Münchow, H.U.Hoffmann, L.Hasselmann, V.Manzke, H.J.Schwartz (1994).
Abstract: Effects of varying degrees of nutrient restriction on rumen physiology and intermediate metabolism
in different sheep breeds.
Proceedings of an International Symposium on "Wild and domestic ruminants in extensive land use systems",
Humboldt-Universität zu Berlin, Ökologische Hefte Nr. 2, (1995).

M.G.H.Walsh, M.M.Kothmann, H.J.Schwartz (1994).
Modelling spatial decisions in a pastoral ecosystem in Northern Kenya (Abstract).
Proceedings of an International Symposium on "Wild and domestic ruminants in extensive land use systems",
Humboldt-Universität zu Berlin, Ökologische Hefte Nr. 2, (1995).

H.J. Schwartz, I. Hary (1993)
Nutritional costs of increased performance of ruminant livestock in: H.J. Schwartz, H. Franzen, (eds.) (1993)
Proceedings of an International Symposium on "Potential and Limitations of Biotechnology in Livestock Production
in Developing Countries:
Part II - Biotechnology for the Improvement of Animal Nutrition and Health", 108-119.
Humboldt Universität Berlin und ATSAF, Bonn.

H.J. Schwartz, C. Mosler, I. Hary, V. Pielert (1993)
Factors affecting spatial preferences in settlement site selection in migratory pastoralism.
Proceedings of an "International Congress on Modelling and Simulation of Environmental and Social Changes" Vol 3, 1217-1222.
University of Western Australia, Perth.

I. Hary, H.J. Schwartz, V. Pielert, C. Mosler (1993)
Land degradation in African pastoral systems and the destocking controversy - testing a simple model.
Proceedings of an "International Congress on Modelling and Simulation of Environmental and Social Changes" Vol 3, 1205-1210.
University of Western Australia, Perth

V. Pielert, H.J. Schwartz, I. Hary (1993)
Consequences of reduced mobility in African patoral systems on biological efficiency, economic productivity and production risk.
Proceedings of an "International Congress on Modelling and Simulation of Environmental and Social Changes" Vol 3, 1187-1192.
University of Western Australia, Perth.

H.J.Schwartz (1992)
Animal nutrition in relation to application of biotechnological procedures.
Proceedings of an International Symposium on "Potential and Limitations of Biotechnology in Livestock Production
in Developing Countries:
Part I - Animal Reproduction and Breeding", FAL Mariensee und ATSAF, Bonn, p 51-67.

H.J.Schwartz, M.G.H.Walsh, Maurizio Dioli (1991)
Productivity of the one-humped camel (Camelus dromedarius) in Eastern Africa (Abstract).
Vth International Rangeland Congress, Montpellier, France.

H.J.Schwartz, W. Schultka, M.G.H.Walsh, M. Nowack (1991)
Abstract: A compendium of important range forage species of the semi-arid lowlands of Northern Kenya.
Vth International Rangeland Congress, Montpellier, France.

H. Nauheimer and H.J.Schwartz (1991)
Abstract: Demographics and Dynamics of Sheep and Goat Flocks in Nomadic Production System of Central Somalia.
Vth International Rangeland Congress, Montpellier, France.

H.J.Schwartz, D. Walther, M.G.H.Walsh (1991)
Abstract: "The Range Management Handbook of Kenya" - Concept and practical applications.
Vth International Rangeland Congress, Montpellier, France.

D.J.Herlocker, M.G.H.Walsh, W. Schultka, H.J.Schwartz, D. Walther (1991)
Abstract: Range condition changes in Northern Kenya and the implications for feed intake of range livestock.
Vth International Rangeland Congress, Montpellier, France.

R.Cornelius, W. Schultka, M.G.H.Walsh, H.J.Schwartz (1991)
Abstract: Vegetational successesion in relation to grazing pressure: A case study from Isiolo District, Kenya.
Vth International Rangeland Congress, Montpellier, France.

M.G.H.Walsh, H.J.Schwartz (1991)
Abstract: Observations regarding the niche structure of domesticated herbivores on a semi-arid thornbush savannah
in Isiolo District, Northern Kenya.
Vth International Rangeland Congress, Montpellier, France.

H.J.Schwartz, M.G.H.Walsh (1990)
Improving the reproductive performance of the dromedary: Consequences to production systems.
Proceedings of an International Workshop "Peut-on am‚liorer les performances de reproductions des camelins ?".
Etudes et Syntheses de l'IEMVT 41, Maisons-Alfort Cedex, p 409-424, (1993)

T.Öztan, A.Elicin, H.J.Schwartz, (1989)
Einfluß der Fütterung und Haltung auf die Milchleistung beim Awassi-Schaf in der Südostttürkei, Tagungsberichte.
Deutsch-Türkisches Symposium, Ege šniversitesi Ziraat Fakultesi, Izmir, 491-502.

S.Mutaf, T.Öztan, H.J.Schwartz, (1989)
The natural ventilation in livestock buildings and a method of calculation, Tagungsberichte.
Deutsch-Türkisches Symposium, Ege šniversitesi Ziraat Fakultesi, Izmir, 531-543.

H.J.Schwartz, (1989)
Leather: Sources and ecological constraints to production.
Internationaler Workshop "Leder" im Rahmen der Übersee-Verkaufsmesse "Partner des Fortschritts", AMK, Berlin.

H.J.Schwartz, H.Schafft (1988)
Integrated livestock-tree cropping systems: A review of potential and constraints arising from the biology of the animal.
Proceedings of the FAO-MARDI International Livestock-Tree Cropping Workshop, 24-38. Malaysian Agricultural Research
and Development Institute, Serdang, Malaysia (1991.)

W.v. Engelhardt, R. Heller, M. Lechner-Doll, T. Rutagwenda, W. Schultka and H.J. Schwartz (1987)
Adaptation of rumen fluid volume, retention time of fluid and particles of indigenous sheep,
goats and camels in harsh feeding conditions.
IV International Symposium on Physiology of Ruminant Nutrition, High Tatras-Strbske Pleso, Czechoslovakia.

H.J.Schwartz and W.Schultka (1987)
Abstract: Dietary preferences and feed intake behaviour of Small East African Goats on a semi-arid thornbush savannah.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1306.

A.B.Carles, C.K.Gachuiri, H.J.Schwartz (1987)
Abstract: Mortality levels and causes for a herd of Small East African Goats on a semi-arid thornbush savannah.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1350.

H.J.Schwartz, W.v.Engelhardt, A.N.Said. R.R.Hofmann, W.Schultka, T.Rutagwenda, A.B.Carles (1987)
Abstract: Adaptive strategies to seasonal changes of forage supply of
Small East African Goats and Somali Blackhead Sheep.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1369.

H.J.Schwartz, T.Rutagwenda, W.v.Engelhardt (1987)
Abstract: Seasonal changes of particle size of freshly ingested rumen content in Small East African Goats.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1379.

M.Lechner-Doll, T.Rutagwenda, W.v.Engelhardt, H.J.Schwartz (1987)
Abstract:Seasonal changes of rumen fluid volume and feed retention time in Kenyan sheep and goats.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1440.

R.R.Hofmann, H.J.Schwartz (1987)
Abstract: Morphological adaption of the forestomach of Small East African Goats to seasonal changes in forage quality.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1440.

H.J. Schwartz, A.B.Carles (1987)
Abstract: Effects of seasonal forage supply on semi-arid pastures on herd productivity in Small East African Goats.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1456.

A.B.Carles, R.G.Wahome, H.J.Schwartz (1987)
Abstract: Milk yields and the lactation curve in a herd of Small East African Goats on a semi-arid thornbush savannah.
Proceedings of the IV International Conference on Goats, Brasilia, Vol. II, p.1456.

H.J.Schwartz (1986)
The Potential of the Camel (Camelus dromedarius) as a Transport and Draught Animal.
FAO-MINEADEP Workshop on "Camels", Kuwait.

H.J.Schwartz, Abdullah N. Said (1986)
Sheep and Goat Nutrition on Natural Pastures in Kenya.
Proceedings of the International Workshop on "The Potential of Small Ruminants in Eastern and Southern Africa",
Organization of African Unity (OAU), Nairobi, Kenya.

A.B.Carles, Abdullah N. Said. H.J.Schwartz (1986)
Sheep and Goat Research in Kenya.
Proceedings of the International Workshop on "The Potential of Small Ruminants in Eastern and Southern Africa",
Organization of African Unity (OAU), Nairobi, Kenya.

W.v. Engelhardt, H. Weyreter, R. Heller, M. Lechner, H.J. Schwartz, R. Rutagwenda, W. Schultka (1986)
Adaptation of indigenous sheep, goats and camels in harsh grazing conditons.
IAEA-SR-115/105, Vienna, Austria.

H.J.Schwartz, W.Schultka, W.v.Engelhardt, T.Rutagwenda, M.Schwartz (1985)
Behavioural adaptation of indigenous sheep and goats to seasonal changes of forage supply on a semi-arid thornbush
pasture in Northern Kenya.
Proceedings of the International Conference on Animal Production in Arid Zones (ICAPAZ), Damascus, Syria.

W.v.Engelhardt, H.J.Schwartz (1985)
Adaptation of the forestomach of indigenous livestock to extreme dietary conditions in arid areas.
Proceedings of the International Conference on Animal Production in Arid Zones (ICAPAZ), Damascus, Syria.

H.J.Schwartz, A.N.Said (1985)
The ecological role of the goat in pastoral production systems in Northern Kenya.
Proceedings of the Simposio Internacional de la Explotacion Caprina en Zonas Aridas, Fuerteventura, Islas Canarias.

H.J.Schwartz, W.Schultka, W.v.Engelhardt (1985)
Feeding strategies of goats on an arid thornbush savannah in Northern Kenya.
Proceedings of the Simposio Internacional de la Explotacion Caprina en Zonas Aridas, Fuerteventura, Islas Canarias.

H.J.Schwartz, A.B.Carles, T.Rutagwenda (1985)
Seasonal changes of some fertility parameters in Small East African Goats on semi-arid pastures in Northern Kenya.
Proceedings of the Simposio Internacional de la Explotacion Caprina en Zonas Aridas, Fuerteventura, Islas Canarias.

T. Rutagwenda, H.J. Schwartz, A.B. Carles and A.N. Said (1985)
Effects of seasonal forage supply on some fertility parameters in the small East African Goat in Northern Kenya.
Conference held at ILCA, Addis Ababa, Ethiopia.

H.J.Schwartz, D.J.Herlocker, A.N.Said (1984)
Forage intake by sheep and goats on semi-arid to arid pastures in Northern Kenya.
Proceedings of the Second International Rangeland Congress, Adelaide. in: P.J.Joss, P.W.Lynch, O.B.Williams Rangelands:
A resource under siege.
Australian Academy of Sciences, Canberra 1986.

A.B.Carles, H.J.Schwartz, C.R.Field (1984)
Factors affecting growth parameters of indigenous sheep and goats in a nomadic pastoral system in Northern Kenya.
Proceedings of the Second International Rangeland Congress, Adelaide. in: P.J.Joss, P.W.Lynch, O.B.Williams. Rangelands:
A resource under siege.
Australian Academy of Sciences, Canberra 1986.

H.J.Schwartz (1983)
Multiple species herds as a tool to improve utilisation of arid rangelands.
Proceedings of the 5th World Conference on Animal Production, Tokyo, Vol 2, 625-626.

A.B.Carles, H.J.Schwartz (1982)
Levels of fertility and mortality and the main factors affecting them, of the Abstract:
Small East African Goat in a nomadic pastoral system in Northern Kenya.
Proceedings of the 3rd International Conference on Goat Production and Disease, Tucson, Arizona.

Rosemary Dolan, H.J.Schwartz (1981)
Abstract: Changing migration patterns amongst the nomadic Rendille from 1923 to 1978.
International Workshop on "Strategies for Developing the Resources of the Arid and Semi-arid Areas of Kenya",
Nairobi, Kenya.

H.J.Schwartz, A.N.Said (1981)
Dietary preferences of goats and nutritive value of forage on semi-arid and arid pastures in Northern Kenya.
Proceedings of the ITOVIC-INRA Symposium International "Nutrition et Systemes d`Alimentation de la Chevre"
Tours, Vol 1, 515-524.

H.J.Schwartz (1977)
The efficiency of livestock management in traditional pastoral societies in Northern Kenya.
United Nations Conference on Desertification, United Nations Environmental Programmes (UNEP)
Nairobi, Kenya.

J.H.Weniger, H.J.Schwartz, D.Steinhauf (1973)
Abstract:Limiting factors in performance development of intensive pig production.
Proceedings of the 3rd World Conference on Animal Production, Melbourne, Australia.

H.J. Schwartz, J.H. Weniger (1972)
Entwicklungstendenzen der Schweineproduktion in der BRD-
Spezielle Fragen der Leistungszucht im Zusammenhang mit modernen Haltungsverfahren.
Tagung "Tenopan", Lima, Peru.

J.H.Weniger, H.J.Schwartz (1971)
Probleme der Schweineproduktion in modernen Haltungssystemen.
Proceedings of the 10th International Congress on Animal Production, Paris, pp. 343 - 361.