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Using non-linear models to predict the developmental rate and temperature characteristics of Nabis capsiformis (Heteroptera:Nabidae)
عنوان دوره: اولین کنگره بین المللی حشره شناسی ایران
نویسندگان
چکیده
Abstract:
The effect of temperature on the N. capsiformis preimaginal development were studied at six constant temperatures ( 18, 22, 24, 28, 31 and 33 ˚C), relative humidity 65±5% and photoperiod of 16L:8D h on Acyrthosiphon pysum (Harris) in growth chamber. Assessments were conducted at each temperature whit 40 specimens. Two linear and nine nonlinear models used to model preimaginal development were tested to describe the relationship between temperature and developmental rate. The development times of all life stages were inversely related to temperature ranging from 18-28˚C. Developmental period for the egg, total development, and egg-adult were 19.94, 28.64, 48.58 days at 18˚C, 5.83, 14.34, 20.18 days at 28˚C, and 4.33, 19.55, 23.88 days at 31˚C, respectively. Linear regression and Ikemoto- Takai linear models were estimated the developmental threshold of the egg, total development, and egg-adult (15.91, 7.97, 11.42) (14.74, 10.55, 12.07˚C), respectively. Thermal constants also estimated for these stages (69.541, 242.01, 340.251) and (81.34, 226.2, 313 degree-days), respectively.
The Lamb, Hilbert & Logan, Logan-6, Stinner and Lactin models were acceptable for fit to data but the Lamb model fitted the data of egg to adult development best according to the criteria adopted for the model evaluation (R2adj, AIC,BIC, RSS, AICC). This model predicted optimum temperature development and upper threshold temperature 31˚C and 35˚C respectively.
The effect of temperature on the N. capsiformis preimaginal development were studied at six constant temperatures ( 18, 22, 24, 28, 31 and 33 ˚C), relative humidity 65±5% and photoperiod of 16L:8D h on Acyrthosiphon pysum (Harris) in growth chamber. Assessments were conducted at each temperature whit 40 specimens. Two linear and nine nonlinear models used to model preimaginal development were tested to describe the relationship between temperature and developmental rate. The development times of all life stages were inversely related to temperature ranging from 18-28˚C. Developmental period for the egg, total development, and egg-adult were 19.94, 28.64, 48.58 days at 18˚C, 5.83, 14.34, 20.18 days at 28˚C, and 4.33, 19.55, 23.88 days at 31˚C, respectively. Linear regression and Ikemoto- Takai linear models were estimated the developmental threshold of the egg, total development, and egg-adult (15.91, 7.97, 11.42) (14.74, 10.55, 12.07˚C), respectively. Thermal constants also estimated for these stages (69.541, 242.01, 340.251) and (81.34, 226.2, 313 degree-days), respectively.
The Lamb, Hilbert & Logan, Logan-6, Stinner and Lactin models were acceptable for fit to data but the Lamb model fitted the data of egg to adult development best according to the criteria adopted for the model evaluation (R2adj, AIC,BIC, RSS, AICC). This model predicted optimum temperature development and upper threshold temperature 31˚C and 35˚C respectively.
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