My interests within evolutionary biology are questions concerning phenotypic plasticity, speciation and evolution of local adaptation.
At present, I focus on mechanisms responsible to reduce gene flow between locally adapted populations, as well as the evolution of mating discrimination between geographically close taxa to avoid producing unviable hybrids reinforcement. In order to study speciation I use marine gastropods as a model organism.
I am involved in a collaborating project studying phenotypic plasticity in the freshwater snail Radix balthica. Phenotypic plasticity is an important developmental strategy among prey organisms against predation, and freshwater snails are an important model organisms for studying traits that have evolved in association with various predators, including behaviour, morphology as well as costs of phenotypic plasticity.
I am also involved in a project for cod stock management in Öresund administrated by Lund University, Multi-Dimensional Co-Management of Coastal Fisheries. The aim of the project is, in collaboration with fishermen from the southern Sweden, survey the seasonal pattern of cod migration, and with molecular techniques and landmark-based geometric morphometrics, investigates how different cod populations contribute to cod stocks.
I am a Marie Curie Fellow and founded by the European Reintegration Grant
Hollander J., Lindegarth M. & K. Johannesson. 2005. Local adaptation but not geographic separation promotes assortative mating in a snail - support for ecological speciation. Animal Behaviour 70: 1209-1217.
Panova M., Hollander J. & K. Johannesson. 2006. Site-specific genetic divergence in parallel hybrid zones suggests non-allopatric evolution of reproductive barriers. Molecular Ecology 15: 4021-4031.
Hollander J., Collyer M. L., Adams D. C. & K. Johannesson. 2006. Phenotypic plasticity in two marine snails: constraints superseding life-history. Journal of Evolutionary Biology 19: 1861-1872.
Hollander J., Adams D. C. & K. Johannesson. 2006. Evolution of adaptation through allometric shifts in a marine snail. Evolution 60: 2490-2497.
Conde-Padín P., Cruz R., Hollander J. & E. Rolán-Alvarez. 2008. Revealing the mechanisms of sexual isolation in a case of sympatric and parallel ecological divergence. Biological Journal of Linnean Society 94: 513-526.
Hollander J. 2008. Testing the grain-size model for the evolution of phenotypic plasticity. Evolution 62: 1381-1389.
Johannesson K., Sundin A., Lindegarth M., Jonsson P. R., Havenhand J. N. & J. Hollander 2008. Male Discrimination of Female Mucous Trails Permits Assortative Mating in a Marine Snail Species. Evolution 62: 3178-3184.
Kemppainen P., Panova M., Hollander J. & K. Johannesson (2009) Complete lack of mitochondrial divergence between two species of NE Atlantic marine intertidal gastropods. Journal of Evolutionary Biology 22: 2000-2011.
Uller T., Hollander J., Astheimer L. & M. Olsson. (2009) Sex-specific developmental plasticity in response to yolk corticosterone in an oviparous lizard. Journal of Experimental Biology 212: 1087-1091.
Sadedin S., Hollander J., Panova M., Johannesson K. & S. Gavrilets (2009) Case studies and mathematical models of ecological speciation 3: Ecotype formation in a Swedish snail. Molecular Ecology 18: 4006-4023.
Hollander J. & R. K. Butlin (2010) The adaptive value of phenotypic plasticity between two ecotypes of a marine gastropod. BMC Evolutionary Biology 10: 333.
Brönmark C., Lakowtiz T. Hollander J. Predator induced morphological plasticity across local populations of a fresh water snail. PLoS ONE
Hollander J., Smadja C. & Butlin R. K., D. Reid (in prep.) Genital-linked character displacement in a large marine phylogeny.
Edgell T. C. & J. Hollander Lessons in modern evolutionary biology: The European green crab in America. In: Galil B, Clark P (eds) In the wrong place: alien marine Crustaceans - distribution, biology and impacts. Springer Series
PhD students, assistant advisor: