2014 we are involved in the following Projects
22 Oct 2014
Female- rather than male-driven sexual coevolution?
Sexual selection is considered a driving force of trait diversification in males and females. Typically they underlying trait dynamics are thought to be driven by males that evoke counter-adaptations in female.
A new experimental study on sexual trait co-evolution in nematodes questions this paradigm. Karoline Fritzsche, Nadine Timmermeyer and co-workers found that relaxed versus elevated selection pressures stimulated female but not male traits to evolve. (published today in Proceedings of the Royal Society B)
13 September 2014
14th "Tropical Marine Ecology" course in Egypt
A student group lead by Melissa Meadows and Ulrike Harant just returned from this summer's field course "Tropical Marine Ecology" at the Red Sea in Egypt.
For more than 10 years now, this course has offered hands-on experience in Marine Ecology, the diversity of coral reef organisms, and in particular the planning and conduction of hypothesis-driven field experiments in small teams.
Lots of fun guaranteed!
11 September 2014
Tobias Gerlach successfully defended his PhD thesis on the visual ecology of deep red fluorescence in fairy wrasses.
09 September 2014
A meta-analysis of the strength and nature of cytoplasmic genetic effects
Conducting a formal meta-analysis (Journal of Evolutionary Biology), Ralph Dobler and co-authors confirmed that cytoplasmic genetic variation is commonly tied to phenotypic expression across animals and plants. Furthermore, their results show that cytoplasmic effects tied to epistatic interactions with the nuclear genome tend to be stronger than additive cytoplasmic effects. This indicates that the cytoplasmic-nuclear interaction is a key unit on which natural selection acts.
22 August 2014
Group day out
This year's day out of the Animal Evolutionary Ecology group led us to the picturesque village of Haigerloch at the Swabian Alb foothills. Core event: a visit to the small but very intriguing 'Atomic Cellar' museum.
16 July 2014
More intense fluorescence at depth supports visual rather than UV-protective function
A recent study by Melissa Meadows and co-workers (Proceedings B) demonstrates that 6 out of 8 measured reef fish species show brighter red fluorescence when caught at depths devoid of ambient red sunlight compared to shallow sun-exposed habitats that offer full spectral ambient light. This findings is in line with the idea that red fluorescence primarily serves a visual or communicative function (then more relevant in deep water), but contradicts the alternative propostion that fluorescence may primarily serve UV-protection (then more relevant in shallow water).
28 May 2014
Red fluoresence mediates male-male aggression.
New work by Tobias Gerlach and colleagues (Proceedings of the Royal Society of London) provides first evidence for the functional significance of red fluorescence in marine fish, using the Indopacific Fairy wrasse Cirrhilabrus solorensis. Their finding represents a key step in understanding why many fish possess red fluorescent pigments in an environment that is almost entirely devoid of red light.
The role of red light is not restricted to this single species of fish. A second recent study led by Christoph Braun (Marine Ecology Progress Series) indicates that red colour signals also play a role in agonistic interactions in the Mediterranean wrasse Coris julis.
24-28 Feb 2014
A workshop on advanced mixed modelling and GLMM in R ...
... is hosted by the Animal Evolutionary Ecology group (Nils Anthes, Katja Heubel, Ines Häderer). Funded via the excellence initiative ("Zukunftskonzept" of the University of Tübingen), the biostatistics company Oikostat (Switzerland) provides an in depth introduction to the modelling and analyses of complex evolutionary and ecological datasets.
18 Feb 2014
Body size affects the depletion of selfsperm stores ...
... in sea slugs, Chelidonura sandrana. With larger individuals depleting at a faster rate than small ones, male mating decisions may be more body size-dependent than previously thought.(Anthes, Werminghausen & Lange, Behavioural Ecol. and Sociobiol., 2014)
8 Jan 2014
Chromatophore units actively control fluorescence ...
... in the eye ring of marine triplefins, Tripterygion delaisi. This finding by Matthias Wucherer and Nico Michiels (Frontiers in Zoology 11: 1) is in line with presumed functions of fluorescence in a commmunication or foraging context.
13 Nov 2013
Cephalo-traumatic mating ...
... in Siphopteron sea-slugs described in new publication by Rolanda Lange et al. in Proceedings B: Biological Sciences.
15 Oct 2013
Winter school on mixed models and GLMM in R ...
... is open for application until 31 Oct 2013. Check details on our accompanying website.
15 Sep 2013
Sex und Evolution: Spermien-handelnde Meeresschnecken ...
... als überlebensgroße Modelle bei der Ausstellung "Sex und Evolution" am Naturkundemuseum Münster.
28 May 2013
News feature on traumatic mating...
... in Spektrum der Wissenschaft online.
08 May 2013
Lange, R. , J. Werminghausen, N. Anthes (2013): Does traumatic secretion transfer manipulate mating roles or reproductive output in a hermaphroditic sea slug? Behav. Ecol. Sociobiol., in press.
30 Apr 2013
Johanna Werminghausen, Rolanda Lange, Nils Anthes (2013): Seeking a Sex-Specific Coolidge Effect in a Simultaneous Hermaphrodite. Ethology, in press
04 Feb 2013
Bea Sanchez Navarro successfully defended her PhD thesis on population genetic signatures and fitness corollaries of occasional sex in otherwise parthenogenetic flatworms. Congratulations!!
30 Jan 2013
Lange, R., K. Reinhardt, N.K. Michiels & N.Anthes (2013). Functions, diversity, and evolution of traumatic mating. Biological Reviews: in press.
08 Jan 2013
Rolanda Lange verteidigt erfolgreich ihre Dissertation mit dem Titel "Evolutionary Ecology of Traumatic Mating in Gastropterid Sea Slugs"
Seidel C and Reinhardt K (2013) Bugging Forecast: Unknown Disliked Occasionally Intimate. Bed Bugs in Germany Meet Unprepared People. PLoS ONE 8(1):e51083 link: (http://dx.plos.org/10.1371/journal.pone.0051083)
17 Sep 2012
Lange R et al. (2012): Female Fitness Optimum at Intermediate Mating Rates under Traumatic Mating. PLoS One 7(8): e43234.
Featured in New Scientist.
12 Jul 2012
Nature Research Highlight
28 Jun 2012
Wucherer MF, Michiels NK (2012):A fluorescent chromatophore changes the level of fluorescence in a reef fish. PLoS ONE 7(6): e37913
24 May 2012
Sprenger, D., Dingemanse, N.J., Dochtermann, N.A., Theobald, J., Walker, S.P.W. (2012) Aggressive females become aggressive males in a sex-changing reef fish. Ecology Letters 15(9):986-992
21 May 2012
Ribou, A.-C. & Reinhardt, K. (2012). Reduced metabolic rate and oxygen radicals production in stored insect sperm. Proc. R. Soc. B 279: 2196-2203<cite></cite>
02 May 2012
Gassner, P., D. Sprenger & N. Anthes (2012): Red Sea butterflyfish responds to changing coral cover. Biodiv. Science 6 (Apr 2012).
08 Mar 2012
Schulte, R.D., B. Hasert, C. Makus, N.K. Michiels, H. Schulenburg (2012): Increased responsiveness in feeding behaviour of Caenorhabditis elegans after experimental coevolution with its microparasite Bacillus thuringiensis. Biol. Lett. 8:234-236
03 Jan 2012
Lange, R., J. Beninde, V. Reichel, J. Werminghausen, T. Gerlach & N. Anthes (2012, in press): Copulation duration does not predict sperm transfer in a marine hermaphrodite. Animal Behaviour.
10 Aug 2011
Rebecca D. Schulte, Carsten Makus, Barbara Hasert, Nico K. Michiels, and Hinrich Schulenburg (2011): Host-parasite local adaptation after experimental coevolution of Caenorhabditis elegans and its microparasite Bacillus thuringiensis. Proc R Soc B 278: 2832-2839.
01 Aug 2011
Dobler, R. & Kölliker, M., in press, Influence of weight asymmetry and kinship on siblicidal and cannibalistic behaviour in earwigs, Animal Behaviour
07 Jul 2011
Reinhardt, K., Naylor, R. & Siva-Jothy, M. T. (2011) Male mating rate is constrained by seminal fluid availability in bed bugs, Cimex lectularius. PLoS ONE 6:7e22082.
20 Apr 2011
Sprenger, D., R. Lange & N. Anthes (2011). Population density and group size effects on reproductive behavior in a simultaneous hermaphrodite. BMC Evol. Biol. 11: 107.
10 Jan 2011
ESEB Congress 2011 - Registration and Abstract submission open.
05 Aug 2010
Anthes, N., P. David, D. Sprenger et al. (2010). Bateman Gradients in Hermaphrodites: An Extended Approach to Quantify Sexual Selection. The American Naturalist 176:249-263 [full text]
19 Apr 2010
Schleicherova D, Lorenzi MC, Sella G, Michiels NK (2010):
06 Apr 2010
Schulte RD, Makus C, Hasert B, Michiels NK, Schulenburg H (2010) Multiple reciprocal adaptations and rapid genetic change upon experimental coevolution of an animal host and its microbial parasite. PNAS (online before print) [full text]
06 Apr 2010
Anthes, N. (2010): Mate choice and reproductive conflict in simultaneous hermaphrodites. In: P.M. Kappeler (ed) Animal Behaviour: Evolution and Mechanisms. Springer Verlag, pp. 329-358.
15 Mar 2010
Siebeck, U. E., D. Sprenger et al. 2010. A Species of Reef Fish that Uses Ultraviolet Patterns for Covert Face Recognition. Current Biology 20:407-410. [full text]
19 Feb 2010
Velavan, T.P., et al. (2010): Detection of multiple infections by Monocystis strains in a single earthworm host using ribosomal internal transcribed spacer sequence variation. Parasitology 137: 45-51 [full text]
05 Feb 2010
Sprenger, D., et al. (2010): Sources of phenotypic variance in egg and larval traits in a marine invertebrate. Evolutionary Ecology 24: 185-194 [full text]
01 Feb 2010
Updated information on SoSe 2010
22 Oct 2009
Our website moved again. Welcome to typo3. Report all mistakes you may find to Gregor.
22 Oct 2009
Sánchez Navarro, Michiels, Köhler and D’Souza (2009): Differential expression of heat shock protein 70 in relation to stress type in the flatworm Schmidtea polychroa (link)
20 Oct 2009
Häderer, Werminghausen et al. (2009): No effect of mate novelty on sexual motivation in the freshwater snail Biomphalaria glabrata. Front. Zool. 6:23 (free full text)
14 Sep 2009
D'Souza & Michiels (2009): Sex in Parthenogenetic Planarians: Phylogenetic Relic or Evolutionary Resurrection? In: Schön, Koen, van Dijk (eds): Lost Sex - The Evolutionary Biology of Parthenogenesis, Springer pp. 377-397 (link)
15 Jul 2009
Michiels, Crowley, Anthes (2009): Accessory male investment can undermine the evolutionary stability of simultaneous hermaphroditism. Biol. Lett., in press. [FREE full text]
13 Jul 2009
DFG Reinhard Koselleck Project
The DFG awarded a 1 Million € risk project to Nico Michiels to study the function and mechanisms of red fluorescence in reef fish during the next 5 years. More to come.
24 Jun 2009
Bedhomme et al. (2009): How does breeding system variation modulate sexual antagonism? Biol. Lett. in press (full text)
14 Apr 2009
Sprenger et al. (2009b): Sources of phenotypic variance in egg and larval traits in a marine invertebrate. Evol. Ecol. in press (full text)
03 Apr 2009
Darwin Rocks! Video Released
Watch the vieo on www.darwinrocks.de
Sprenger et al. (2009a): The role of body size in early mating behavior in a simultaneous hermaphrodite, Chelidonura sandrana. Behav. Eco. Sociobiol. 63: 953-958. (full text)
15 Feb 2009
New research project
German Science Foundation (DFG) has approved funding of a 3-year research project entitled "Evolutionary ecology of sexual reciprocity in a system with complex genitalia and traumatic injections". More info on our research pages.
22 Oct 2008
Launch of the new website
This will be our new website. Welcom to Fiona!
16 Sep 2008
Michiels et al. (2008): Red fluorescence in reef fish: A novel signalling mechanism? (BMC-Ecology, Volume 8)Open Access
09 Jun 2008
Dennis Sprenger et al. (2008): Natural female mating rate maximizes hatchling size in a marine invertebrate. J. Animal Ecol. 77: 696-701. (full text)
19 Apr 2008
Schulenburg, Boehnisch (2008) Diversification and adaptive sequence evolution of Caenorhabditis lysozymes (Nematoda: Rhabditidae). BMC-Evol. Biol.(full text)
10 Apr 2008
Schulenburg et al. (2008) Specificity of the innate immune system and diversity of C-type lectin domain (CTLD) proteins in the nematode Caenorhabditis elegans. Immunobiol. 213:237-250. (full text)
Find all our publications here.