Welcome to the Pollux lab


My research focuses on the evolution of complex reproductive adaptations, such as livebearing, superfetation and placentation. I am trying to understand: (i) what the ecological variables are that drive the evolution of these complex adaptations, (ii) what the anatomical, physiological and molecular changes are that underly their evolution, and (iii) what the consequences are of these novel adaptations for sexual selection and maternal-fetal interactions during development. To study these questions, we perform comparative studies at the species (macro-evolutionary) and population (micro-evolutionary) level to investigate the ecology, (stress) physiology, life history evolution, biomechanics, immunology, genomics and transcriptomics associated with these reproductive adaptations. 

    In our studies, we use Cyprinodontiform fishes because: (a) livebearing, superfetation and placentation independently evolved multiple times in this Order (i.e. in the family Poeciliidae, Anablepidae and Goodeidae), (b) these fish can be found in a range of different environments, (c) they have fast generation times, (d) are easy to keep and experiment with in the lab and (e) are very cool fish.

Dr. B.J.A. Pollux

Assistant Professor Evolutionary Biology


Experimental Zoology Group

Department of Animal Sciences

Wageningen University

Zodiac, Building 122

Room E1233

De Elst 1

NL-6708 WD Wageningen

the Netherlands


Phone: +31.(0)317.486083 (my office)

Phone: +31.(0)317.483509 (secretary)

E-mail: bart.pollux@wur.nl

Web: http://www.bartpollux.nl

Selected Publications