phototaxis

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Related to phototactic: Phonotactic

phototaxis

 [fo″to-tak´sis]
taxis of cells and microorganisms under the influence of light. adj., adj phototac´tic.

pho·to·tax·is

(fō'tō-tak'sis),
Reaction of living protoplasm to the stimulus of light, involving bodily motion of the whole organism toward (positive phototaxis) or away from (negative phototaxis) the stimulus. Compare: phototropism.
[photo- + G. taxis, orderly arrangement]

phototaxis

/pho·to·tax·is/ (-tak´sis) the movement of cells and microorganisms in response to light.phototac´tic

phototaxis

(fō′tō-tăk′sĭs)
n.
The movement of an organism or a cell toward or away from a source of light.

pho′to·tac′tic (-tăk′tĭk) adj.
pho′to·tac′ti·cal·ly adv.

pho·to·tax·is

(fō'tō-tak'sis)
Reaction of living protoplasm to the stimulus of light, involving bodily motion of the whole organism toward (positive phototaxis) or away from (negative phototaxis) the stimulus.
Compare: phototropism
[photo- + G. taxis, orderly arrangement]

phototaxis

the movement of a whole organism in response to a directional light stimulus. For example, movement of unicellular algae or fruit flies towards a source of light is positive phototaxis, while movement away from light if the stimulus is too strong is negative phototaxis.

phototaxis

the movement of cells and microorganisms under the influence of light.
References in periodicals archive ?
Influence of light intensity and wavelength on phototactic behaviour of larval silver perch Bidyanus bidyanus and golden perch Macquaria ambigua and the effectiveness of light traps.
Ontogeny of phototactic behavior in red drum larvae (Sciaenidae, Sciaenops ocellatus).
The procedure yields cells that are immediately motile and reproducibly phototactic.
A minimum of 15 minutes to re-equilibrate was required before another trial could be conducted (cells re-equilibrated less than 15 minutes were not consistent in their phototactic response).
Moreover, these authors documented a negative phototactic behavior of juveniles, positioning themselves under airlines, under plate racks or in corners of the aquaria during the day, especially in the unshaded aquaria, although grazing during the night was evident (cleared areas over plates).
glabratus may be considered a species-specific phototactic response to decreasing average solar radiation and decreasing average temperatures in the late afternoon.
This pattern has not been documented for postlarvae, which are generally assumed to feed all day because they do not seem to have the same negative phototactic behavior as juveniles and adults.
According to Light (1934a) most termites castes are negatively phototactic, but the alates, attracted to light, seek to emerge into openings and fly toward light.
The present study quantified the phototactic colony site selection of C.
Their brachypterous "crawlers" were clearly equivalent to Schmeider's "second form", but within the macropterous, positively phototactic group, they distinguished 2 forms that differed in their propensity for flight.
While we could easily discern 2 female forms--a long-winged, positively phototactic disperser and a short-winged non-disperser--we could not reliably distinguish between jumpers and flyers.