behavior: repellent effects of cigarette beetle, Lasioderma serricorne (Coleoptera: Anobiidae), to light-emitting diodes.
In addition, the phototactic
response of larval and juvenile fishes may be lower at lower light intensities (Gehrke, 1994; Stearns et al., 1994).
We found that the control comb jelly was able to compensate for the disorienting effects of altered gravity by using its phototactic
The positive relationship between density and percent cloud cover may have been a phototactic
response to decreasing light conditions.
A note on phototactic
behaviour and on phoretic associations in larvae of Mecistogaster ornata Rambur from northern Costa Rica (Zygoptera: Pseudostigmatidae).
Live zooplankters (principally copepods) for isotopic analysis were separated from suspended detritus by settling and decanting, or by phototactic
behavior in the absence of fish kairomone as well as the change in phototactic
behavior in response to the presence of fish kairomone are studied.
The larvae of both species of Antipathes in Hawaii are known to be negatively phototactic
which explains why they are not found at shallow depths (< 30 m) and are most abundant beneath overhangs and on other dimly lit surfaces (Grigg, 1965).
Consistent with this finding, adult Limulus exhibit a positive phototactic
response when their MEs are illuminated with UV light but no response when their MEs are illuminated with visible light.
Observations of the fly in the field strongly suggest it is positively phototactic
, as during mornings more flies are usually seen at sunlit than shady sides of trees (Frick et al.
If pelagic larvae are positively phototactic
and become negatively phototactic
during the settlement stage it is likely that light conditions would have had an influence on [??][O.sub.2], as has been shown for juvenile individuals (Ahmed et al.
Responses of Larvae from the Marine Sponge Xestospongia proxima.