Light Sense in Nematodes

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Science  21 Jan 1966:
Vol. 151, Issue 3708, pp. 337-338
DOI: 10.1126/science.151.3708.337


The stimulating effect of daylight on the oxygen uptake of the infective larvae of Haemonchus contortus and Nippostrongylus basiliensis, measured at constant temperature, provides the first proof of a dermal light sense in the Nematoda. Nippostrongylus larvae are less sensitive than those of Haemonchus and require very high light intensities before a significant effect can be detected.