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photopositive

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photopositive [¦fōd·ō′päz·əd·iv]
(electronics)
Having positive photoconductivity, hence increasing in conductivity (decreasing in resistance) under the action of light; selenium ordinarily has photopositivity.
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Light traps are taxon-selective because they target fishes that are photopositive and able to swim to and enter the trap (Thorrold, 1992; Choat et al.
Effects of current speed and turbidity on stationary light-trap ... by Lindquist, David C.; Shaw, Richard F. / Fishery Bulletin
For example, at relatively high current velocities, settlement-stage larvae that are photopositive but that have limited swimming speeds may not have the ability to respond to a light cue and swim into a light trap as they are carried past the sampling device.
Current velocity and catch efficiency in sampling settlement-stage ... by Anderson, Todd; Bartels, Claudine T.; Hixon, Mark A.; Bartels, Erich; Carr, Mark H.; Shenker, Jonath / Fishery Bulletin
 
 
 
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