한국의 멸종위기종인 꼬마잠자리(Nannophya pygmaea Rambur: 잠자리과, 잠자리목) 알의 발육과 온도의 관계

Abstract

This study was conducted to estimate relationship between temperature and egg development of Nannophya pygmaea, an endangerd dragonfly species in Korea, using eight different temperature conditions (17, 20, 22, 25, 28, 30, 33, and 36℃). Eggs of N. pygmaea were collected from female adults inhabited a small wetland in Mungyeong-si, Gyeongsangbuk-do, Korea, in June 2007. As a result, hatching rates were 2.86, 17.09, 24.32, 39.67, 34.43, 40.57, 44.79, and 1.75% at 17, 20, 22, 25, 28, 30, 33, and 36℃, respectively. The nonlinear model of the temperature related to egg development was well fit to the modified Sharpe and DeMichele model. The derived lower developmental threshold temperature for egg hatching was 14.02℃(y=0.005988x-0.084, r2=0.99), and the derived optimal development temperature was 30~35℃.