NZPPS   ·  Journal home   ·   Past issues  ·  This volume   ·   Previous abstract   ·   Next abstract



New Zealand Plant Protection 63 (2010): 208-213

Effect of body weight on reproductive performance of Micromus tasmaniae (Walker) (Neuroptera: Hemerobiidae)

A. Yadav, Q. Wang and X.Z. He

ABSTRACT

Micromus tasmaniae Walker is an important predator of a number of economically important pests such as aphids. The 'larger-the-better' theory predicts that reproductive fitness is positively linearly associated with body size or weight. To test whether larger insects perform better reproductively, the insect population was divided into three weight groups: light, average and heavy, and the reproductive performance of nine breeding treatments (three male weights three female weights) was assessed. The body weight of female M. tasmaniae had no significant effect on reproductive fitness in terms of fecundity, fertility, fertility rate, oviposition period and longevity, suggesting that female size variation is of secondary importance in determining reproductive fitness in this species. Male size had significant positive effect on female fecundity, fertility and fertility rate and reproductive period. This suggests that heavy males may transfer larger ejaculates that provide more sperm and male-derived nutrients to females than light males.

Keywords: Micromus tasmaniae, body weight, fecundity, fertility, reproduction.

Related articles
pdfEffect of photoperiod on development and reproduction in Tasmanian lacewing Micromus tasmaniae (Walker) (Neuroptera: Hemerobiidae)
A. Yadav, X.Z. He and Q. Wang (2008)
New Zealand Plant Protection 61: 338-342
pdfTesting for pesticide resistance in lettuce aphid
P.J. Workman, M.A.W. Stufkens, N.A. Martin and R.C. Butler (2004)
New Zealand Plant Protection 57: 239-243
pdfEffect of temperature on predation by Tasmanian lacewing larvae
S.S. Islam and R.B. Chapman (2001)
New Zealand Plant Protection 54: 244-247

Copyright © 2010 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.