What determines the number of juvenile instars in the tropical grasshopper Cornops aquaticum (Leptysminae: Acrididae: Orthoptera)?

被引：23

作者：

Adis, J

Lhano, M

Hill, M

Junk, WJ

Marques, MI

Oberholzer, H

机构：

[1] Max Planck Inst Limnol, Trop Ecol Working Grp, D-24302 Plon, Germany

[2] Univ Republica, Fac Ciencias Entomol, Montevideo, Uruguay

[3] Rhodes Univ, Dept Zool & Entomol, ZA-6140 Grahamstown, South Africa

[4] Univ Fed Mato Grosso, Inst Biociencias, Cuiaba, Brazil

[5] Plant Protect Res Inst, Weeds Res Div, ZA-0001 Pretoria, South Africa

来源：

STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT | 2004年 / 39卷 / 02期

关键词：

sunshine; insolation; distribution; macrophytes; Cornops; Eichhornia; Pontederiaceae; South America;

D O I：

10.1080/01650520412331271729

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

Cornops aquaticum (Brunei) is host specific on Eichhornia spp. and Pontederia spp. (Pontederiacae). Its present distribution ranges from Mexico to Argentina. The number of juvenile instars (5-7) apparently mirrors the photoperiod and temperature pulses of different climatical conditions in the respective geographical regions. Based on life-history data, three working hypotheses are proposed for forthcoming studies. These will test whether the varying number of juvenile instars represents a phenotypic plasticity of a single genotype or an adaptation that is genetically fixed, due to an evolutionary relationship of the host with its host-plant.

引用

页码：127 / 132

页数：6

共 31 条

[1] Feeding impact and bionomics of the grasshopper Cornops aquaticum on the water hyacinth Eichhornia crassipes in Central Amazonian floodplains [J].