Males of the African phaneropterine Gonatoxia helleri seem even to imitate the spectrum of the female response to disturb eavesdropping rivals (Heller and Hemp in prep.).
The most common snake was the southern Pacific rattlesnake (Crotalus oreganus helleri) (n = 53 independent observations), whereas the least common were the San Diego nightsnake (Hypsiglena ochrorhyncha klauberi), D.
The recorded distribution within the area was extended for Urotrygon reticulata, Anchoa helleri, Cathorops steindachneri, Bollmannia stigmatura and Sphoeroides kendalli.
A study with green swordtail (Xiphophorus helleri) has been the only to report some beneficial effect on fish growth for humic substances (MEINELT et al., 2004).
Liemann, "Effects of rank order fights on whole-body and blood concentrations of androgens and corticosteroids in the male swordtail (Xiphophorus helleri)," Zeitschrift fur Tierpsychologie, vol.