Abstract
IN 1969–70 1,420 adult specimens of the amphipod Gammarus lacustris were taken from 2 eutrophic ponds in the northern Zealand; 94.9% were normal in colour (grey to brown) and 5.1% were blue. Dissections showed that all the blue shrimps were infected with the final larval stage (cystacanth) of the acanthocephalan genus Polymorphus, whereas the brown shrimps were only 3.9% infected with cystacanths. This difference was statistically highly significant (χ2 = 860.2, P<0.001).
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Barrett, J., and Butterworth, P. E., Comp. Biochem. Physiol., 27, 575 (1968).
Lenel, R., Compt. Rend., 238, 948 (1954).
Denny, M., PhD thesis, Univ. Alberta, Canada (1967).
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HINDSBO, O. Effects of Polymorphus (Acanthocephala) on Colour and Behaviour of Gammarus lacustris. Nature 238, 333 (1972). https://doi.org/10.1038/238333a0
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DOI: https://doi.org/10.1038/238333a0
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