Panmixia in a fragmented and unstable environment: the hydrothermal shrimp Rimicaris exoculata disperses extensively along the Mid-Atlantic ridge

Teixeira, Sara; Serrão, Ester; ARNAUD-HAOND, Sophie

http://hdl.handle.net/10400.1/4081

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Authors

Teixeira, Sara

Serrão, Ester

ARNAUD-HAOND, Sophie

Abstract(s)

Dispersal plays a fundamental role in the evolution and persistence of species, and especially for species inhabiting extreme, ephemeral and highly fragmented habitats as hydrothermal vents. The Mid-Atlantic Ridge endemic shrimp species Rimicaris exoculata was studied using microsatellite markers to infer connectivity along the 7100-Km range encompassing the sampled sites. Astonishingly, no genetic differentiation was found between individuals from the different geographic origins, supporting a scenario of widespread large-scale dispersal despite the habitat distance and fragmentation. We hypothesize that delayed metamorphosis associated to temperature differences or even active directed migration dependent on physical and/or chemical stimuli could explain these results and warrant further studies on adaptation and dispersal mechanisms.

URI

http://hdl.handle.net/10400.1/4081

Citation

Teixeira, S.; Serrão, E.A.; Arnaud-Haond, S. Panmixia in a fragmented and unstable environment: The hydrothermal shrimp Rimicaris exoculata disperses extensively along the Mid-Atlantic ridge, PLoS ONE, 7, 6, SI-SI, 2012.