I have always been fascinated by fish and particularly by their enormous diversity both in shape and colour as well as in behaviour. I had studied mate choice behaviour in various cichlids of the East African Great Lakes investigating female mating preferences and multiple mating and sperm competition. I also studied the lekking behaviour of bower building cichlids of Lake Malawi together with my colleagues Martin Genner, Domino Joyce and Kyle Young.
Currently, I am a lab manager in Ole Seehausen's group in Bern, running the molecular lab and running the aquarium facilities. I am also responsible for animal experiment, the respective permits and animal protection issues in our group.
August 2008 - present
manager in the division of “Aquatic Ecology and Evolution” with Prof.
Ole Seehausen, in the Institute of Ecology and Evolution at the
University of Bern, Switzerland
July 2007 –July 2008
SNF Post-doc project studying patterns of multiple paternity in Lake Malawi cichlids (together with Dr. Mairi Knight and Dr. Martin Genner) at the University of Plymouth, UK
Oct 2003 –June 2007
student at University of Bern, Switzerland, on "Fertilization mechanisms
and multiple mating in a mouthbrooding cichlid from Lake Tanganyika,
East Africa"; Thesis advisor: Prof. Michael Taborsky
at Lake Malawi for one month with Drs. D. Joyce, M. Genner & K.
Young on "Sexual selection and speciation in bower building cichlids"
2002 - 2003
Fieldwork at Lake Victoria for Martine Maan (4 months) at TAFIRI (Tanzanian Fisheries Research Institute) in Mwanza, Tanzania
1996 - 2002
studying Biology at the University of Basel, Switzerland
Feller, Anna F.; Häsler, Marcel P.; Peichel, Catherine L.; Seehausen, Ole (2020). Genetic architecture of a key reproductive isolation trait differs between sympatric and non-sympatric sister species of Lake Victoria cichlids. Proceedings of the Royal Society. Series B - biological sciences, 287(1924), p. 20200270. Royal Society of London 10.1098/rspb.2020.0270
Feulner, Philine; Schwarzer, Julia; Häsler, Marcel; Meier, Joana; Seehausen, Ole (2018). A Dense Linkage Map of Lake Victoria Cichlids Improved the Pundamilia Genome Assembly and Revealed a Major QTL for Sex-Determination. G3 Genes Genomes Genetics, 8(7), pp. 2411-2420. Genetics Society of America 10.1534/g3.118.200207
Lemoine, Melissa; Barluenga, Marta; Lucek, Kay; Mwaiko, Salome; Häsler, Marcel; Chapman, Lauren J.; Chapman, Colin A.; Seehausen, Ole (2018). Recent sympatric speciation involving habitat-associated nuptial colour polymorphism in a crater lake cichlid. Hydrobiologia, 832(1), pp. 297-315. Springer Netherlands 10.1007/s10750-018-3746-1
Marques, David Alexander; Lucek, Kay Jurka Olaf; Häsler, Marcel; Feller, Anna Fiona; Meier, Joana; Wagner, Catherine; Excoffier, Laurent; Seehausen, Ole (2016). Genomic landscape of early ecological speciation initiated by selection on nuptial colour. Molecular Ecology, 26(1), pp. 7-24. Wiley-Blackwell 10.1111/mec.13774
Lucek, K.; Haesler, M.P.; Sivasundar, A. (2012). When Phenotypes Do Not Match Genotypes - Unexpected Phenotypic Diversity and Potential Environmental Constraints in Icelandic Stickleback. Journal of heredity, 103(4), pp. 579-584. Oxford: Oxford University Press 10.1093/jhered/ess021
Zeller, Michael; Lucek, Kay; Haesler, Marcel P.; Seehausen, Ole; Sivasundar, Arjun (2012). Signals of predation-induced directional and disruptive selection in the threespine stickleback. Evolutionary ecology research, 14(2), pp. 193-205. Tucson, Ariz.: Evolutionary Ecology
Zeller, Michael; Lucek, Kay; Haesler, Marcel; Seehausen, Ole; Sivasundar, Arjun (2012). Little evidence for a selective advantage of armour-reduced threespined stickleback individuals in an invertebrate predation experiment. Evolutionary ecology, 26(6), pp. 1293-1309. London: Springer Netherlands 10.1007/s10682-012-9566-2
Haesler, Marcel P.; Lindeyer, Charlotte M.; Otti, Olivier; Bonfils, Danielle; Heg, Dik; Taborsky, Michael (2011). Female mouthbrooders in control of pre- and postmating sexual selection. Behavioral Ecology, 22(5), pp. 1033-1041. New York, N.Y.: Oxford University Press 10.1093/beheco/arr087
Young, Kyle A.; Genner, Martin J.; Häsler, Marcel P.; Joyce, Domino A. (2010). Sequential female assessment drives complex sexual selection on bower shape in a cichlid fish. Evolution, 64(8), pp. 2246-2253. Hoboken, N.J.: Wiley 10.1111/j.1558-5646.2010.00984.x
Häsler, Marcel; Lindeyer, Charlotte M; Taborsky, Michael (2009). Reproductive parasitism: male and female responses to conspecific and heterospecific intrusions at spawning in a mouth-brooding cichlid Ophthalmotilapia ventralis. Journal of fish biology, 75(7), pp. 1845-1856. Oxford: Blackwell 10.1111/j.1095-8649.2009.02442.x
Genner, Martin J.; Knight, Mairi E.; Haesler, Marcel P.; Turner, George F. (2009). Establishment and expansion of Lake Malawi rock fish populations after a dramatic Late Pleistocene lake level rise. Molecular Ecology, 19(1), pp. 170-182. Oxford: Wiley-Blackwell 10.1111/j.1365-294X.2009.04434.x
Young, Kyle A.; Genner, Martin J.; Joyce, Domino A.; Haesler, Marcel P. (2009). Hotshots, hot spots, and female preference: exploring lek formation models with a bower-building cichlid fish. Behavioral Ecology, 20(3), pp. 609-615. New York, N.Y.: Oxford University Press 10.1093/beheco/arp038
Maan, Martine E.; Eshuis, Brechtje; Haesler, Marcel P.; Schneider, Maria Victoria; van Alphen, Jacques J.M.; Seehausen, Ole (2008). Color Polymorphism and Predation in a Lake Victoria Cichlid Fish. Copeia, 2008(3), pp. 621-629. Washington, D.C.: American Society of Ichthyologists and Herpetologists 10.1643/CE-07-114
Hamilton, Ian Michael; Häsler, Marcel; Taborsky, Michael (2006). Predators, reproductive parasites, and the persistence of poor males on leks. Behavioral Ecology, 17(1), pp. 97-107. New York, N.Y.: Oxford University Press 10.1093/beheco/ari099
Maan, Martine; Häsler, Marcel; Seehausen, Ole; van Alphen, Jacques (2006). Heritability and heterochrony of polychromatism in a Lake Victoria cichlid fish: stepping stones for speciation? Journal of experimental zoology. Part B - molecular and developmental evolution, 306B(2), pp. 168-176. Hoboken, N.J.: Wiley-Liss 10.1002/jez.b.21083
Häsler, Marcel P.; Seehausen, Ole (2005). Inheritance of female mating preference in a sympatric sibling species pair of Lake Victoria cichlids: implications for speciation. Proceedings of the Royal Society. Series B - biological sciences, 272(1560), pp. 237-245. Royal Society of London 10.1098/rspb.2004.2946