Definition of positive phototaxis. Meaning of positive phototaxis. Synonyms of positive phototaxis

Here you will find one or more explanations in English for the word positive phototaxis. Also in the bottom left of the page several parts of wikipedia pages related to the word positive phototaxis and, of course, positive phototaxis synonyms and on the right images related to the word positive phototaxis.

Definition of positive phototaxis

positive phototaxis
Phototaxis Pho`to*tax"is, Phototaxy Pho"to*tax`y, n. [NL. phototaxis; photo- + Gr. ? an arranging.] (Biol.) The influence of light on the movements of low organisms, as various infusorians, the zo["o]spores of certain alg[ae], etc.; also, the tendency to follow definite directions of motion or assume definite positions under such influence. If the migration is toward the source of light, it is termed positive phototaxis; if away from the light, negative phototaxis. -- Pho`to*tac"tic, a. -- Pho`to*tac"tic*al*ly, adv.

Meaning of positive phototaxis from wikipedia

- type of phototaxis is true phototaxis, which is a directed movement up a gradient to an increasing amount of light. This is analogous to positive chemotaxis...
- towards a light source. This reaction or behavior is called positive phototaxis since phototaxis refers to a response to light and the organism is moving...
- the organism to either swim towards the light (positive phototaxis), or away from it (negative phototaxis). A related response ("photoshock" or photophobic...
- type of phototaxis is true phototaxis, which is a directed movement up a gradient to an increasing amount of light. This is analogous to positive chemotaxis...
- appear to circle artificial lights. The reason for this behavior (positive phototaxis) is currently unknown. One hypothesis is called celestial or transverse...
- adaptations. Many flagellates and probably all motile algae exhibit a positive phototaxis (i.e. they swim or glide toward a source of light). For this purpose...
- additionally in positive phototaxis (in planula larvae of hydrozoans), as well as in avoiding harmful amounts of UV radiation via negative phototaxis. Directional...
- abandon their nutrient intake and crawl, attracted by light – a positive phototaxis – towards a dry, light area, to get an optimal spread of the spores...
- present in juvenile fish such as sockeye salmon smolts. Kinesis (biology) Phototaxis Phototropism Häder, D.-P.; Lebert, M. (2001). Photomovement. Elsevier...
- dependent but the direction of movement is not solely explained by positive phototaxis. It has also been shown to swim across large gradients in temperature...