Abstract
A recent event of allopatric speciation (a time span of about 4 000 years) is reported from a comparison between two guilds of amphipod gammarids from the central Baltic Sea and from the Limfjord (inner Danish waters), respectively. For at least two of the five species populations involved, a genetically fixed habitat specialization has led to the establishment of reproductive barriers. It has, however, not been possible to correlate this speciation event with electrophoretically determined isozyme changes. It is argued that the lack of correlation is due to the presence of an initial time lag before a speciation event can be detected as isozyme differences between newly formed species populations as predicted by the neutrality hypothesis for evolution at the molecular level.
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Communicated by T. Fenchel, Aarhus
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Kolding, S. Genetic adaptation to local habitats and speciation processes within the genus Gammarus (Amphipoda: Crustacea). Mar. Biol. 89, 249–255 (1985). https://doi.org/10.1007/BF00393658
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DOI: https://doi.org/10.1007/BF00393658