Ongoing niche differentiation under high gene flow in a polymorphic brackish 
water threespine stickleback (Gasterosteus aculeatus) population

Østbye, Kjartan; Taugbøl, Annette; Ravinet, Mark; Harrod, Chris; Pettersen, Ruben Alexander; Bernatchez, Louis; Vøllestad, Leif Asbjørn

doi:10.1186/s12862-018-1128-y

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Ongoing niche differentiation under high gene flow in a polymorphic brackish water threespine stickleback (Gasterosteus aculeatus) population

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Harrod, Chris
Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Citation

Østbye, K., Taugbøl, A., Ravinet, M., Harrod, C., Pettersen, R. A., Bernatchez, L., et al. (2018). Ongoing niche differentiation under high gene flow in a polymorphic brackish water threespine stickleback (Gasterosteus aculeatus) population. BMC Evolutionary Biology, 18: 14. doi:10.1186/s12862-018-1128-y.

Cite as: https://hdl.handle.net/21.11116/0000-0000-C18E-6

Abstract

Marine threespine sticklebacks colonized and adapted to brackish and freshwater environments since the last Pleistocene glacial. Throughout the Holarctic, three lateral plate morphs are observed; the low, partial and completely plated morph. We test if the three plate morphs in the brackish water Lake Engervann, Norway, differ in body size, trophic morphology (gill raker number and length), niche (stable isotopes; δ15N, δ13C, and parasites (Theristina gasterostei, Trematoda spp.)), genetic structure (microsatellites) and the lateral-plate encoding Stn382 (Ectodysplasin) gene. We examine differences temporally (autumn 2006/spring 2007) and spatially (upper/lower sections of the lake -- reflecting low versus high salinity).