Field thermal ecology and water relations of gregaria phase African armyworm caterpillars, Spodoptera exempta (Lepidoptera:Noctuidae)

被引：9

作者：

Klok, CJ ^{[1
]}

Chown, SL ^{[1
]}

机构：

[1] Univ Pretoria, Dept Zool & Entomol, ZA-0002 Pretoria, South Africa

来源：

JOURNAL OF THERMAL BIOLOGY | 1998年 / 23卷 / 02期

关键词：

phase polymorphism; development time; thermoconformer; desiccation resistance; critical thermal limits;

D O I：

10.1016/S0306-4565(97)00068-5

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Thermal biology, water relations and behaviour of gregaria phase Spodoptera exempta caterpillars were examined in the field. Regression analysis indicated that these caterpillars are thermoconformers (T-b=0.218 + 1.14 T-a). Caterpillars tended to congregate at > 10 cm above the soil surface because of food availability. No evidence of behavioural thermoregulation was found. Field-collected caterpillars had a CTmin of 11.8 +/- 0.13 degrees C(mean +/- S.E.) and a CTmax of 55.9 +/- 0.45 degrees C. Caterpillars maintained reasonably constant body water contents and haemolymph osmolality (c. 330 mOsml.kg(-1)) despite fluctuations in microclimate. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：131 / 142

页数：12