Dipl.-Biol. Matthias Asher

Department of Behavioural Biology
University of Muenster
Badestr. 9
D-48149 Muenster
Germany

Tel.: +49 (0)251-8323885
Fax: +49 (0)251-8323896

E-mail: matthias@asher.de



Present position

PhD student, Department of Behavioural Biology, University of Muenster (Germany). Supervised by Prof. Dr. Norbert Sachser. Thesis title: Comparative analysis of social and mating systems of closely related neotropical rodent species in their natural habitats.



Research interests

Evolution of social and mating systems of neotropical rodents

In South America, caviomorph rodents inhabit a wide range of different ecosystems, and nearly all basic types of mammalian social and mating systems are represented in this suborder. This makes the Caviomorpha a highly interesting group since the impact of different ecological conditions on the evolution of social and mating systems can be investigated in closely related species.

My current research is focussed on the evolution of social and mating systems in the Caviinae, the true guinea pigs. I am conducting field studies on closely related species of wild guinea pigs which inhabit ecologically different habitats to determine the ultimate factors that have shaped the evolution of their divergent social and mating systems.



Wild cavy (Cavia aperea)
Yellow-toothed cavy (Galea musteloides)

I study natural populations of wild cavies (Cavia aperea) in Uruguay and Southeast Brazil, yellow-toothed cavies (Galea musteloides) near Mendoza in Argentina, and a new species of the genus Galea in the high Andean valley of Cochabamba in Bolivia.

Applied methods are radio-telemetry, direct observations, mark - recapture and the collection of different ecological parameters, including climatological data and the mapping of habitat structure. Complementary to the fieldwork, molecular analyses of parentage are being conducted using multi-locus DNA fingerprinting and microsatellite analysis.
 




Life trapping 
Individual marking Radio telemetry DNA fingerprinting

By investigating the impact of different ecological factors like the habitat structure, food availability and predation risk on the development of divergent social and mating systems within the Caviinae I am attempting to reveal general rules for the social evolution of rodents.



Publications

Journal articles 

Asher, M., Schrameyer, T., Epplen, J. T., Kraus, C. Trillmich, F. & Sachser, N. (in preparation): Social and mating system of the wild cavy (Cavia aperea) in its natural habitat.

Asher, M., Oliveira, E. S. & Sachser, N. (in press): Social system and spatial organization of wild guinea pigs (Cavia aperea) in a natural low density population. Journal of Mammalogy.

Trillmich, F., Kraus, C. Künkele, J., Asher, M., Clara, M., Dekomien, G., Epplen, J. T., Saralegui, A. & Sachser, N. (2004): Species level differentiation of two cryptic species pairs of wild cavies, genera Cavia and Galea, with a discussion of the relationship between social systems and phylogeny in the Caviinae. Canadian Journal of Zoology 82: 516–524.

 

Special publications, conference proceedings and book chapters

Asher, M. & Sachser, N. (in press): Divergent social and mating systems of wild cavies in their natural habitats. In: Contributions to the 2nd European Conference on Behavioural Biology, Groningen.

Asher, M. & Sachser, N. (in press): Of machos and hippies - strongly contrasting breeding systems in two closely related species of wild guinea pigs. In: Contributions to the 10th International Behavioral Ecology Congress, Jyvaskyla.

Asher, M. (2004): The evolution of social and mating systems in the Caviinae (Rodentia). In: Co-Evolution 2004. Contributions to the 9th Graduate student meeting of the evolutionary biology section of the Deutsche Zoologische Gesellschaft, Muenster: 12.

Asher, M. (2003): Social organization of wild guinea pigs in their natural habitats. In: Contributions to the 5th Graduate student meeting of the Ethologische Gesellschaft and the Deutsche Zoologische Gesellschaft, Bielefeld: 6.

Asher, M. & Sachser, N. (2003): Different forms of social organization in closely related species of wild guinea pigs. In: Contributions to the XXVIII International Ethological Conference, Florianópolis, Revista de Etologia 5, Supplement I: 21

Asher, M. & Sachser, N. (2002): Social system and habitat use in a population of wild cavies (Cavia aperea). In: Contributions to the 1st European Conference on Behavioural Biology, Muenster: 4.

Asher, M. & Sachser, N. (2002): Habitat use and social structure of wild guinea pigs under natural conditions. In: 95th annual meeting of the Deutsche Zoologische Gesellschaft, Halle, Zoology 105, Supplement V: 3.

Asher, M. & Sachser, N. (2001): Social system and spatial organisation of the wild guinea pig (Cavia aperea) in its natural habitat. In: Libro de resúmenes, XVI Jornadas Argentinas de Mastozoología, Mendoza: 19.

Asher, M. & Sachser, N. (2001): Habitat use and social structure of wild guinea pigs under natural conditions. In: Contributions to the XXVII International Ethological Conference, Tuebingen, Advances in Ethology 36. Supplements to Ethology: 117.

Wölbing, O., Asher, M., Bishr, Y., Kuhn, W., & Sachser, N. (2000): Applying GIS for investigations in behavioral biology. In: Strobl, J., Blaschke, T. & Griesebner, G. (Eds.): Angewandte Geographische Informationsverarbeitung XII. Beitraege zum AGIT-Symposium Salzburg 2000. Heidelberg, Wichmann Verlag: 520-528.

Asher, M. & Sachser, N. (2000): Social structure and habitat selection of wild guinea pigs (Cavia aperea) under natural conditions. In: Contributions to the 8th International Behavioral Ecology Congress, Zuerich: 12.

Asher, M. & Sachser, N. (2000): Habitat selection and social system in a population of wild guinea pigs (Cavia aperea) under natural conditions. In: 93rd annual meeting of the Deutsche Zoologische Gesellschaft, Bonn, Zoology 103, Supplement III: 25.

Asher, M. (2000): Soziale Organisation und Habitatnutzung des Wildmeerschweinchens (Cavia aperea) im natuerlichen Lebensraum. Mitteilungsblatt der Ethologischen Gesellschaft 44: 41.

Touma, C., Asher, M. & Sachser, N. (1998): Social structure in a group of Vietnam Sika deer in the Allwetterzoo Muenster. In: Contributions to the 2nd International Symposium on Physiology and Ethology of Wild and Zoo Animals, Berlin, Advances in Ethology 33, Supplements to Ethology: 45.



Talks and posters

Scientific talks

Asher, M. & Sachser, N. (Jul/2004): Of machos and hippies - strongly contrasting breeding systems in two closely related species of wild guinea pigs. 10th International Behavioral Ecology Congress, Jyvaskyla (Finland).

Asher, M. (Feb/2004): The evolution of social and mating systems in the Caviinae (Rodentia). Co-Evolution 2004. 9th Graduate student meeting of the evolutionary biology section of the Deutsche Zoologische Gesellschaft, Muenster (Germany).

Asher, M. (Dec/2003): Von Machos und Hippies - unterschiedliche Sozialsysteme wilder Meerschweinchenarten in ihrem natuerlichen Lebensraum. Department of Animal Physiology, University of Bayreuth, Bayreuth (Germany).

Asher, M. (Oct/2003): Social organization of wild guinea pigs in their natural habitats. 5th Graduate student meeting of the Ethologische Gesellschaft and the Deutsche Zoologische Gesellschaft, Bielefeld (Germany).

Asher, M. & Sachser, N. (Aug/2003): Different forms of social organization in closely related species of wild guinea pigs. XXVIII International Ethological Conference, Florianópolis (Brazil).

Asher, M. & Sachser, N. (May/2002): Habitat use and social structure of wild guinea pigs under natural conditions. 95th Annual Meeting of the Deutsche Zoologische Gesellschaft, Halle (Germany).

Asher, M. (Mar/2002): Sistema social y organisación espacial del cuy (Cavia aperea) en su habitat natural. Unidad de Biodiversidad y Genetica, Universidad de San Simon, Cochabamba (Bolivia).

Asher, M. & Sachser, N. (Nov/2001): Social system and spatial organisation of the wild guinea pig (Cavia aperea) in its natural habitat. XVI Jornadas Argentinas de Mastozoología, Mendoza (Argentina).

Asher, M. & Sachser, N. (Aug/2001): Habitat use and social structure of wild guinea pigs under natural conditions. XXVII International Ethological Conference, Tuebingen (Germany).

Asher, M. (Mar/2001): Comparative analysis of the social and mating systems of closely related neotropical rodent species in their natural habitats. Instituto Argentino de Investigaciones de las Zonas Áridas, Mendoza (Argentina).

Asher, M. (Aug/2000): Soziale Organisation und Habitatnutzung des Wildmeerschweinchens (Cavia aperea) im natuerlichen Lebensraum. Department of Animal Behaviour, University of Bielefeld, Bielefeld (Germany).

 

Scientific posters

Asher, M. & Sachser, N. (forthcoming): Divergent social and mating systems of wild cavies in their natural habitats. 2nd European Conference on Behavioural Biology, Groningen (Netherlands).

Asher, M. (2003): Social and mating systems of wild guinea pigs. Graduate student meeting of the Evangelisches Studienwerk, Villigst (Germany).

Asher, M. & Sachser, N. (2002): Social system and habitat use in a population of wild cavies (Cavia aperea). 1st European Conference on Behavioural Biology, Muenster (Germany). Awarded with the second poster prize.

Asher, M. & Sachser, N. (2000): Social structure and habitat selection of wild guinea pigs (Cavia aperea) under natural conditions. 8th International Behavioral Ecology Congress, Zuerich (Switzerland).

Asher, M. & Sachser, N. (2000): Habitat selection and social system in a population of wild guinea pigs (Cavia aperea) under natural conditions. 93rd Annual Meeting of the Deutsche Zoologische Gesellschaft, Bonn (Germany).

Touma, C., Asher, M. & Sachser, N. (1998): Social structure in a group of Vietnam Sika deer in the Allwetterzoo Muenster. 2nd International Symposium on Physiology and Ethology of Wild and Zoo Animals, Berlin (Germany).



Curriculum vitae

Education

2000 - present PhD student at the University of Muenster (Germany) focussing on the evolution of social and mating systems of neotropical rodents

1998 - 1999 Diplom (equivalent of M.S., summa cum laude) in Biology at the University of Muenster (Germany). Thesis title: Behavioural ecology of wild guinea pigs (Cavia aperea)

1993 - 1999 Studies in Biology, Geography and Philosophy at the University of Muenster (Germany)


Research experience

2002
Habitat use of the Bolivian yellow-toothed cavy (Galea n. spec.) in the Andean valley of Cochabamba (Bolivia)

2001 - 2002
Social and mating system of the yellow-toothed cavy (Galea musteloides) in the province of Mendoza (Argentina)

2000 - 2001
Social and mating system of the wild cavy (Cavia aperea) in the department of Rocha (Uruguay)

1998 - 1999
Habitat use and social organisation of the wild cavy (Cavia aperea) in the state of São Paulo (Brazil)

1997
Social structure of the Vietnam sika deer (Cervus nippon pseudaxis) in the Zoo of Muenster (Germany)

1996
Population ecology and genetics of the Golden ground beetle (Carabus auronitens) in the Muensterland (Germany)


Teaching

2001 - present Zookurs - Saeugetiersozialsysteme (classes on mammalian social systems for graduate students), Department of Behavioural Biology, University of Muenster

2000 - present Methoden der Verhaltensbiologie (classes in behavioural biology for graduate students), Department of Behavioural Biology, University of Muenster

1997 - 1998
Zoologische Exkursionen im Muensterland (zoological excursions for undergraduate students), Department of Zoology and Genetics, University of Muenster

1995 - 1998
Zoologische Bestimmungsuebungen (classes in animal taxonomy for undergraduate students), Department of Zoology and Genetics, University of Muenster


Funding

2003 - present
Scholarship of the Evangelisches Studienwerk

2002
Scholarship of the University of Muenster

2000 - 2002 Travel and research grant of the German Academic Exchange Service (DAAD)

1998 - 1999 Research grant of the German Science Foundation (DFG)


Conservation work

2004 - present Consultant for local groups in North Rhine-Westphalia of the German Society for Nature Conservation (NABU)

2003 - present Leader of the photographic division and co-founder of the media and public relations group of the German Society for Nature Conservation (NABU) in Muenster

1994 - present Habitat conservation of the European tree frog (Hyla arborea) and other endangered amphibian species. Wetland conservation group of the German Society for Nature Conservation (NABU) in Muenster

1994 Co-founder of the wetland conservation group of the German Society for Nature Conservation (NABU) in Muenster

1989 - 1993 Conservation work for endangered amphibian and bird species. German Society for Nature Conservation (NABU) in Hamm


Special skills and interests

Languages German (mother tongue)
English and Spanish (fluent, spoken and written)

French and Portuguese (good proficiency)

Computer skills Geographic Information Systems (ArcGIS 8.3)
Home range analysis (Ranges 6)
Digital image processing (Photoshop 7.0)

Photography Nature and wildlife photography

Hobbies Rowing, volleyball, and travelling



Personal background

I was born in Hamburg, Germany, in 1973 and according to my parents, I have been observing and collecting worms, insects, and spiders since I was fast enough to grab them. While growing up, I extended my skills in catching animals to amphibians and reptiles, and during high school I became active in the monitoring of the yearly frog and toad migrations. Since then, I have been working on different projects of conservation biology of endangered amphibian species, and I am still active in this field as a member of the German Society for Nature Conservation (NABU).

After finishing high school in 1992 and a subsequent year of community service at the Diakonsches Werk in Hamm (Germany), I started my scientific career at the University of Muenster (Germany) in 1993 with studies in Biology, Geography and Philosophy.
Being curious about different cultures, I visited numerous foreign countries during university years. Apart from two trips to North America (USA and Mexico) and many visits to different European countries, I travelled to East-Africa (Tanzania and Kenya) in 1994 and to Australia in 1996. Both journeys were dedicated to extensive zoological expeditions, which are my biggest hobby.

Throughout my biological studies, I focussed on zoology, and in 1999 I completed my Diplom (Master's) on the behavioural ecology of wild guinea pigs (Cavia aperea), under supervision of Prof. Dr. Norbert Sachser. The fieldwork underlying this study was conducted in Brazil and the investigation was part of the focal point program "Genetic Analysis of Social Systems" of the German Science Foundation (DFG).

Since 2000, I am PhD student at the Department of Behavioural Biology at the University of Muenster (Germany), supervised by Prof. Dr. Norbert Sachser. My current research is focussed on the evolution of social and mating systems of neotropical rodents and includes fieldwork in Brazil, Uruguay, Argentina, and Bolivia, which is funded by the German Academic Exchange Service (DAAD).



Collaborators

Germany

Norbert Sachser (my adviser) and all members of his lab (University of Muenster)
Cornelia Kraus and Fritz Trillmich (University of Bielefeld)
Tanja Schrameyer and Jörg T. Epplen (University of Bochum)


Argentina

Paula Taraborelli, Stella M. Giannoni and Ricardo A. Ojeda (Instituto Argentino de Investigaciones de las Zonas Áridas, Mendoza)


Bolivia

Milton Fernandez and Jennifer Cahill (Universidad Mayor de San Simon, Cochabamba)


Brazil

Carlos H. Salvador (Universidade de Santa Catarina, Florianópolis)
Elisabeth Spinelli de Oliveira (Universidade de São Paulo)


Uruguay

Juan Carlos Gambarotta (Recursos Renovables Naturales, Rocha)
Mario Clara (Universidad de la Republica, Montevideo)



Organisations
(Membership)

Animal Behavior Society (ABS)

Association for the Study of Animal Behaviour (ASAB)

Deutsche Zoologische Gesellschaft (DZG)

Ethologische Gesellschaft

International Society for Behavioral Ecology (ISBE)

Naturschutzbund Deutschland (NABU)

Sociedad Argentina para el Estudio de los Mamíferos (SAREM)

Verband Deutscher Biologen (vdbiol)

World Wide Fund for Nature (WWF)




[last updated 10 July 2004]