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Three-spined sticklebacks
A linkage map for three-spined stickleback fish provides a reference for studies of morphological and behavioural changes during vertebrate evolution.
Email: Jonathan B Weitzman - jonathanweitzman@hotmail.com News from The Scientist 2001, 2(1):20011221-01
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The three-spined stickleback (Gasterosteusaculeatus) is a teleost fish that has undergone rapid adaptive evolution and speciation within the last 15,000 years. The benthic species has greatly reduced body armour, increased body depth and fewer gill rakers than the limnetic species, which more closely resemble an ancestral marine fish. In the December 20/27 Nature, Peichel et al. report the generation of a genome-wide linkage map for G. aculeatus (Nature 2001, 414:901-905).
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