Some pre-emergence studies on final-instar larvae of Tetragoneuria cynosura (Odonata)

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
William Jeffrey Mantz (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site:
Paul Lutz

Abstract: Final-instar larvae of Tetragoneuria cynosura collected in Guilford Co., N.C. from October 1974 until March 1975 were subjected to experimental temperatures and photoperiods. These environmental factors were analyzed for their effects on food consumption, weight changes, and certain aspects of starvation in larvae. Animals were maintained at 11-hour and 14-hour photoperiods at temperatures of 15°C and 20°C until emergence. Three additional studies were also undertaken to investigate further the effects of photoperiodic induction on final-instar larvae. Larvae maintained at either photoperiodic condition at 15°C showed no differences in rates of food consumption; however, differences did occur with larvae on the two daylengths maintained at 20°C. The most significant differences in feeding rates occurred when larvae housed at different temperatures on a constant photoperiod were compared. Larvae maintained at the higher temperature on both photoperiodic conditions had much higher feeding rates over their short-day counterparts. Animals that were used in feeding experiments from October until March responded faster to 14-hour daylengths than to 11-hour photoperiods. Weight changes in larvae of the experimental conditions were correlated with results obtained from the feeding studies.

Additional Information

Language: English
Date: 1975
Tetragoneuria $x Larvae
Tetragoneuria $x Food
Dragonflies $x Larvae

Email this document to