Wolf Dittus

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Wolfgang Peter Johann Dittus (born 1 June 1943) is a primatologist and behavioral ecologist based in Sri Lanka.

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Wolf Dittus with a toque monkey, "Macaca sinica" WolfDittus.jpg
Wolf Dittus with a toque monkey, "Macaca sinica"

Early life

Born in Berlin, Germany, and brought up in the rural Black Forest (German: Schwarzwald) region Baden-Württemberg, Wolfgang 'Wolf' Dittus migrated to Canada in 1953, where he studied geology at McGill University. During this time, however, his interests shifted to psychology and zoology, his early research having been on the song patterns of cardinal birds, inspiring an interest in animal communication in general.

Career

He was awarded a PhD by the University of Maryland in 1974, his doctoral dissertation having been on 'The ecology and behavior of the toque monkey, Macaca sinica', in pursuit of which he moved to Sri Lanka in 1968. [1] This work was conducted largely at a research site established at Polonnaruwa under one of the Smithsonian Institution's projects that commenced in Sri Lanka during the 1960s funded by the United States' Public Law (PL) 480 'Food for Peace' programme. With the phasing out of the Smithsonian's association with this program in 1972, all but Dittus' study on toque macaques came to an end. His PhD research contributed original and seminal discoveries in the fields of behavioral-ecology, population biology and social evolution of primates. [2]

The Sri Lanka primate project still continues, now more than four decades later. It is recognized as being the most intensive long-term study of a wild population of primates, anywhere, ever. [3] Dittus' team tracks (among dozens of other variables) the life histories of some 4,500 macaques from birth to death, maintains matrilineal and patrilineal genealogies, documents migration between troupes and monitors the social rank and relations of each individual through time. His team has been engaged in similar long-term studies on the grey langur (Semnopithecus priam thersites) and the northern purple-faced leaf monkey (Semnopithecus vetulus philbricki) at the same site.

The initiative contributes to the disciplines of sociobiology, forest ecology, population biology, genetics, epidemiology and conservation in these primates. It has up to now generated more than 50 scientific papers[; [4] See Publications below] and is remarkable for its engagement with the local community as well as a large number of students and volunteers―national and international, specialist and lay―over its lifetime. The research has yielded deep insights into the ecology and evolutionary biology not only of primates, but also of social mammals in general. On the premise that public education is basic to nature conservation, Dittus has contributed to many documentary films in international television about the fascinating phenomenon of primate societies. [5] [6] [7]

Personal life

Wolf Dittus, has two children Thomas and Tatiana, and continues to live and work in Sri Lanka. [8]

Publications and co-publications

1. Dittus, W. P. J. and Lemon, R. E. 1969. Effects of song tutoring and acoustic isolation on song repertoires of cardinals. Animal Behaviour 17, 523-533.

2. Dittus, W. P. J., 1974. The ecology and behavior of the toque monkey, Macaca sinica. Ph.D. Thesis, University of Maryland, Maryland; 55+127+56 pp.

3. Ekanayake, D.K., Welch, R.K., Kieft, R., Hajduk, S. & Dittus, W.P.J. 2007 . Transmission dynamics of Cryprosporidium infection in a natural population of non-human primates at Polonnaruwa. American Journal Tropical Medicine and Hygiene 77(5), 818-822.

4. Dittus, W.P.J. 2004. Demography: a window to social evolution; pp 87–116 in (Thierry, B., Singh, M. & Kaumanns, W., eds.): Macaque societies: A model for the study of social organization, Cambridge University Press, Cambridge.

5. De Silva, A.M., Dittus, W.P.J., Amerasinghe, P.H., et al. 1999. Serologic evidence for an epizootic dengue virus infecting toque macaques (Macaca sinica) at Polonnaruwa, Sri Lanka. American Journal of Tropical Medicine and Hygiene 60(2), 300-306. 6. Dittus, W.P.J. 1998. Birth sex ratios in toque macaques and other mammals: integrating the effects of maternal condition and competition. Behavioral Ecology and Sociobiology, 44: 149-160 .

7. Keane, B., Dittus, W.P.J. and Melnick, D.J. 1997.Paternity assessment in wild groups of toque macaques (Macaca sinica) at Polonnaruwa, Sri Lanka using molecular markers. Molecular Ecology 6(3): 267-282.

8. Hoelzer, G. A., Dittus, W. P. J., Ashley, M. V. et al. 1994. The local distribution of highly divergent mitochondrial-DNA haplotypes in toque macaques (Macaca sinica) at Polonnaruwa, Sri Lanka. Molecular Ecology 3(5), 451-458.

9. Cheverud, J.M., Wilson, P. and Dittus, W.P.J. 1992. Primate population studies at Polonnaruwa. 3. Somatometric growth in a natural population of toque macaques (Macaca sinica). Journal of Human Evolution 23(1), 51-77.

10. Cheverud, J.M. and Dittus, W.P.J. 1992. Primate population studies at Polonnaruwa. 2. Heritability of body measurements in a natural-population of toque macaques (Macaca sinica). American Journal of Primatology 27(2), 145-156.

11. Dittus, W. P. J. 1987. Group fusion among wild toque-macaques - an extreme case of intergroup resource competition. Behaviour 100, 247-291.

12. Dittus, W.P.J. 1986. Sex-differences in fitness following a group take-over among toque macaques - testing models of social evolution. Behavioral Ecology and Sociobiology 19(4): 257-.

13. Dittus, W.P.J. 1985. The influence of cyclones on the dry evergreen forest of Sri Lanka. Biotropica 7(1), 1-14.

14. Dittus, W.P.J. 1984. Toque macaque food calls - semantic communication concerning food distribution in the environment. Animal Behaviour 32, 470-477.

15. Dittus W.P.J. 1980. The social regulation of primate populations: a synthesis; in Lindburg D.G. (ed.), The macaques: studies in ecology, behavior and evolution. Van Nostrand Reinhold, New York, pp 263–286.

16. Dittus, W.P.J. 1979. Evolution of behaviors: regulating density and age-specific sex ratios in a primate population. Behaviour 69, 265-302.

17. Dittus, W.P.J. 1977. The social regulation of population density and age-sex distribution in toque monkey. Behaviour 63(2), 281-322.

Related Research Articles

<span class="mw-page-title-main">Macaque</span> Genus of Old World monkeys

The macaques constitute a genus (Macaca) of gregarious Old World monkeys of the subfamily Cercopithecinae. The 23 species of macaques inhabit ranges throughout Asia, North Africa, and Europe. Macaques are principally frugivorous, although their diet also includes seeds, leaves, flowers, and tree bark. Some species such as the long tailed macaque will supplement their diets with small amounts of meat from shellfish, insects, and small mammals. On average, southern pig-tailed macaques in Malaysia eat about 70 large rats each per year. All macaque social groups are matriarchal, arranged around dominant females.

<span class="mw-page-title-main">Crab-eating macaque</span> Species of monkey from Southeast Asia

The crab-eating macaque, also known as the long-tailed macaque and referred to as the cynomolgus monkey in laboratories, is a cercopithecine primate native to Southeast Asia. A species of macaque, the crab-eating macaque has a long history alongside humans. The species has been alternately seen as an agricultural pest, a sacred animal, and, more recently, the subject of medical experiments.

<span class="mw-page-title-main">Rhesus macaque</span> Species of Old World monkey

The rhesus macaque, colloquially rhesus monkey, is a species of Old World monkey. There are between six and nine recognised subspecies that are split between two groups, the Chinese-derived and the Indian-derived. Generally brown or grey in colour, it is 47–53 cm (19–21 in) in length with a 20.7–22.9 cm (8.1–9.0 in) tail and weighs 5.3–7.7 kg (12–17 lb). It is native to South, Central, and Southeast Asia and has the widest geographic range of all non-human primates, occupying a great diversity of altitudes and a great variety of habitats, from grasslands to arid and forested areas, but also close to human settlements. Feral colonies are found in the United States, thought to be either released by humans or escapees after hurricanes destroyed zoo and wildlife park facilities.

<span class="mw-page-title-main">Barbary macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Japanese macaque</span> Only nonhuman primate in Japan

The Japanese macaque, also known as the snow monkey, is a terrestrial Old World monkey species that is native to Japan. Colloquially, they are referred to as "snow monkeys" because some live in areas where snow covers the ground for months each year – no other non-human primate lives farther north, nor in a colder climate. Individuals have brownish grey fur, pinkish-red faces, and short tails. Two subspecies are known.

<span class="mw-page-title-main">Gray langur</span> Genus of Old World monkeys

Gray langurs, also called are Old World monkeys native to the Indian subcontinent constituting the genus Semnopithecus. Traditionally only one species Semnopithecus entellus was recognized, but since about 2001, additional species have been recognized. The taxonomy has been in flux, but currently eight species are recognized.

<span class="mw-page-title-main">Purple-faced langur</span> Species of Old World monkey

The purple-faced langur, also known as the purple-faced leaf monkey, is a species of Old World monkey that is endemic to Sri Lanka. The animal is a long-tailed arboreal species, identified by a mostly brown appearance, dark face and a very shy nature. The species was once highly prevalent, found in suburban Colombo and the "wet zone" villages, but rapid urbanization has led to a significant decrease in the population level of the monkeys. It had traditionally been classified within the lutung genus Trachypithecus but was moved to the genus Semnopithecus based on DNA evidence indicating that is it more closely related to the gray langurs.

<span class="mw-page-title-main">Moor macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Lion-tailed macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Toque macaque</span> Species of Old World monkey

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Sexual swelling, Sexual skin,or Anogenital tumescence refers to localized engorgement of the anus and genital region of some female primates that vary in size over the course of the menstrual cycle. Thought to be an honest signal of fertility, male primates are attracted to these swellings; preferring, and competing for, females with the largest swellings.

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References

  1. ""wolfgang dittus" - Google Search". www.google.com.au.
  2. "Dr. Wolfgang Dittus : Scientific Advisor : Dark Days in Monkey City". Archived from the original on 2009-03-02. Retrieved 2011-10-20.
  3. Clutton-Brock, T. 1985. Why study large animals? New Scientist. 100(1380) pp. 193-196
  4. "Wolf Dittus, Smithsonian National Zoo Research Scientist - National Zoo| FONZ". Archived from the original on 2012-09-27. Retrieved 2011-10-20.
  5. "Wolfgang Dittus". IMDb.
  6. "Movies - The New York Times". Movies & TV Dept. The New York Times . 2019-01-13. Archived from the original on 2012-07-16. Retrieved 2019-01-17.
  7. "Clever Monkeys - Production Credits | Nature | PBS". PBS . Archived from the original on 2014-10-26. Retrieved 2017-09-18.
  8. "Primate Center Eco Lodge, Srilanka". Primates.lk. 2015-08-30. Retrieved 2019-01-17.