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Fig. 3. Percentage of newts swimming upstream to the site of amino acid or stream
water (control) release. Each compound was tested at 105 mol
l1; functional groups are illustrated above respective bars.
Arg, arginine; Ala, alanine; Gly, glycine; Tau, taurine; Glu, glutamate; Lys,
lysine; Cys, cysteine; Leu, leucine; Phe, phenylalanine; Met, methionine; Asp,
aspartate; Trp, tryptophan; Val, valine; WF, worm fluids with a corresponding
arginine concentration of 105 mol l1).
Asterisks denote a significant difference between larval responses to test and
control (stream water) solutions, using a Fisher exact test
(P<0.05).