Gesellschaft für Primatologie eV Ziele und Aufgaben

Weitere Magazine

Empfehlungen

Info

Nachwuchsförderpreis der GfP-Preis 2009 Der Preis für die beste Abschlussarbeit wurde in diesem Jahr nicht vergeben, da kein passender Bewerber gefunden wurde. Bewerbungsfristen 2010 und 2011 Für das Jahr 2010 sind die Bewerbungsfristen bereits abgelaufen (30.4.2010). Aber auch im kommenden Jahr vergibt die GfP wieder den Nachwuchsförderpreis der GfP für herausragende Diplom-, Master oder Staatsexamensarbeiten. Bewerbungen können bis zum 30.4.2011 eingereicht werden. Der gleiche Stichtag gilt für Anträge auf Förderung einer Freilandarbeit aus dem Christian- Vogel-Fonds. Der Christian-Vogel-Fond stellt bis zu 500 Euro zur Förderung primatologischer Freilandforschung. Zusammenfassung von Diplom-/Masterarbeiten und Dissertationen Um den wissenschaftlichen Austausch zwischen den Mitgliedern zu fördern, veröffentlichen wir Zusammenfassungen von Diplom-, Master- oder Doktorarbeit im Rundbrief. Im Folgenden können sie die Zusammenfassungen von 5 Doktorarbeiten, 1 Diplomarbeiten und einer Masterarbeit lesen, die an verschiedenen primatologisch arbeitenden Instituten entstanden sind. Zusammenfassungen für den nächsten Rundbrief können Sie gern bei der Schriftführerin einreichen (per email an marina.scheumann@tiho-hannover.de). Diese sollten nicht mehr als 350 Wörter umfassen und bei Diplomarbeiten muss die Zustimmung des Betreuers ersichtlich sein. Doktorarbeiten Variation in susceptibility to parasite infection: patterns, determinants and consequences in red-fronted lemurs Dagmar Clough Georg-August Universität Göttingen, German Primate Center, Department of Behavioral Ecology and Sociobiology Supervisor: Prof. Peter Kappeler Parasites and infectious diseases represent an ecological force shaping animal social evolution. Particular attention has been paid to parasite infection as a driver of mate choice in models of sexual selection as one sex may advertise parasite resistance via elaborate sexual selected phenotypic signals. Although empirical studies supporting the importance of parasite 22
infection in natural populations abound in various vertebrate orders, relatively little is known about both dynamics and impact of parasite infections and infectious diseases in natural populations of primates. More specifically, there is a particular lack of baseline parasitological information in strepsirrhine primate species. Using an interdisciplinary approach that combined individual parasite, genetic, hormone and sociobiological information, I studied patterns and proximate determinants of gastro-intestinal parasite susceptibility in a wild population of red-fronted lemurs (Eulemur fulvus rufus). Male red-fronted lemurs display a more conspicuous facial colouration than females do and there is considerable inter-individual variation in this trait among males. In a second step, I examined if strong parasite infections have negative consequences on male reproductive and whether male colourations is a condition-dependent ornament that can be provide information on male quality. During two 4-month field studies in 2006 and 2007, I collected several types of data on 29 adult individually marked male and female lemurs in Kirindy Forest, western Madagascar. Data on parasite infection (prevalence, species richness, infection intensity) and hormone (androgen and glucocorticoid) levels were obtained by analysing faecal samples that were collected non-invasively once per week. Data on mating and reproductive success were obtained through focal animal observations and genetic paternity analyses. The entire population was infected by a minimum of 10 unique parasite species including 8 helminth and 2 protozoa species. Prevalence of the majority of parasite infection and parasite species richness was higher than ever recorded from other lemur species. The four social groups studied differed partially in their parasite fauna, which was probably due to minor differences in habitat parameters. Comparisons to other lemur studies indicated that short-term assessments of lemur health might underestimate the real parasite burden, and the application of long-term studies such as conducted during this project is advised. Part of individual variability in parasite infection could be explained by a newly detected genetic polymorphism in the IL4 gene promoter that regulates immune response against nematode infections and facilitates worm expulsion. Carriers of a particular genotype showed highest nematode infection intensities, suggesting a functional role of the IL4 polymorphism, yet individual reproductive success appeared not impaired and long-term population analyses indicated higher reproductive success of these individuals than expected. Host intrinsic factors such as group size, age, sex and rank explained only a part of variation in parasite infection susceptibility on population level and lemur characteristic traits (morphology, social organization, mating system) helped to understand detected patterns. Male mating and reproductive success were not correlated to any measure of parasite infection, which suggests a non-functional role of gastro-intestinal parasite in red-fronted lemur sexual selective processes. Additionally, male facial colouration, although under proximate control of androgens, did not appear to function as prominent predictor of reproductive success. The population was subject to strong seasonal variation in parasite infection levels between years, which was significantly associated to changes in androgen and glucocorticoid levels. Contrary to predictions of the immunocompetence hypothesis, which assumes immune-suppressive action of androgens, results indicate an immune-enhancing effect of androgen and glucocorticoid levels, leading to a decrease in parasite species richness and nematode infection intensity. Although the comprehensive approach applied in this thesis provided valuable new insights, I propose that additional factors such as body condition or nutrient supply but also information on parasite population dynamics need to be incorporated into future models in order to further improve our understanding of the multi-faceted interactions of primate hosts and parasites under natural conditions. 23
Seite 1 und 2: Gesellschaft für Primatologie e.V.
Seite 3 und 4: Inhaltsverzeichnis Vorwort 4 Aus de
Seite 5 und 6: Aus der Gesellschaft Mitgliederbewe
Seite 7 und 8: scorn. Kortlandt felt, not unjustif
Seite 9 und 10: Protokoll der Mitgliederversammlung
Seite 11 und 12: Der Vorstands beschloss, dass der G
Seite 13 und 14: sich gegen ein eventuelles Verbot v
Seite 15 und 16: Die GfP sollte sich ihre Bankgesch
Seite 17 und 18: Kassenbericht für 2009 von Dr. Oli
Seite 19 und 20: overlapping ranges of different mor
Seite 21: individuals overlap. The individual
Seite 25 und 26: Inequality in nature: Patterns of r
Seite 27 und 28: eproductive states and were smalles
Seite 29 und 30: Gesellschaften gerade für den Nach
Seite 31: Konferenzen und Workshops Zunächst
Seite 34 und 35: Info: www.gfgenetik.de/de/tagungen/
Seite 36: Gesellschaft für Primatologie e.V.

Gesellschaft für Primatologie eV Ziele und Aufgaben

Erfolgreiche ePaper selbst erstellen

Template löschen?

Als Template speichern?