Animal Evolutionary Ecology

News

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

Congratulations!

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

New publication

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

New publication

Johanna Werminghausen, Rolanda Lange, Nils Anthes (2013): Seeking a Sex-Specific Coolidge Effect in a Simultaneous Hermaphrodite. Ethology, in press

04 Feb 2013

PhD defence

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

New Publication

Lange, R., K. Reinhardt, N.K. Michiels & N.Anthes (2013). Functions, diversity, and evolution of traumatic mating. Biological Reviews: in press.

08 Jan 2013

Promotionsfeier

Rolanda Lange verteidigt erfolgreich ihre Dissertation mit dem Titel "Evolutionary Ecology of Traumatic Mating in Gastropterid Sea Slugs"

02 Jan
2013

New Publication

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

New Publication

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

The recent article by Sprenger et al. got featured in NATURE

28 Jun 2012

New publication

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

New publication

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

New publication

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

New publication

Gassner, P., D. Sprenger & N. Anthes (2012): Red Sea butterflyfish responds to changing coral cover. Biodiv. Science 6 (Apr 2012).

08 Mar 2012

New publication

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

New publication

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

New publication

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

New publication

Dobler, R. & Kölliker, M., in press, Influence of weight asymmetry and kinship on siblicidal and cannibalistic behaviour in earwigs, Animal Behaviour

07 Jul 2011

New publication

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

New publication

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

New publication

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

New publication

Schleicherova D, Lorenzi MC, Sella G, Michiels NK (2010):
Gender expression and group size: a test in a hermaphroditic and a gonochoric congeneric species of Ophryotrocha (Polychaeta) J Exp Biol 213, 1586-1590 [full text]

06 Apr 2010

New publication

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

New publication

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

New publication

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

New publication


 

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

New publication

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

New website.

Our website moved again. Welcome to typo3. Report all mistakes you may find to Gregor.

22 Oct 2009

New Publication

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

New Publication

 

Häderer, Werminghausen et al. (2009): No effect of mate novelty on sexual motivation in the freshwater snail Biomphalaria glabrataFront. Zool. 6:23  (free full text)

14 Sep 2009

New Publication

 

 

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

New Publication

 

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

New Publication

 

Bedhomme et al. (2009): How does breeding system variation modulate sexual antagonism? Biol. Lett. in press (full text)

14 Apr 2009

New Publication

 

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

02.04.2009

New Publication

 

Sprenger et al. (2009a): The role of body size in early mating behavior in a simultaneous hermaphrodite, Chelidonura sandranaBehav. 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

New Publication

 

Michiels et al. (2008): Red fluorescence in reef fish: A novel signalling mechanism? (BMC-Ecology, Volume 8)Open Access

09 Jun 2008

New Publication

 

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

New Publication

 

 Schulenburg, Boehnisch (2008)  Diversification and adaptive sequence evolution of Caenorhabditis lysozymes (Nematoda: Rhabditidae). BMC-Evol. Biol.(full text)

10 Apr 2008

New Publication

 

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.