THE INFLUENCE OF HOST SIZE ON SEX-RATIOS IN THE PARASITOID DIGLYPHUS-BEGINI (HYMENOPTERA, EULOPHIDAE)

被引：31

作者：

HEINZ, KM ^{[1
]}

PARRELLA, MP ^{[1
]}

机构：

[1] UNIV CALIF RIVERSIDE,DEPT ENTOMOL,RIVERSIDE,CA 92521

来源：

ECOLOGICAL ENTOMOLOGY | 1990年 / 15卷 / 04期

关键词：

differential mortality; Diglyphus begini; Leafminer; Liriomyza trifolli; male‐biased sex ratio;

D O I：

10.1111/j.1365-2311.1990.tb00822.x

中图分类号：

Q96 [昆虫学];

学科分类号：

摘要：

Abstract. 1. Sex ratio in the ectoparasitoid, Diglyphus begini (Ashmead), attacking larvae of the dipterous leafminer Liriomyza trifolii (Burgess) in glasshouse marigolds, is best depicted by a model where sex ratio varies as a function of host size. 2. Male D. begini progeny are produced in hosts significantly smaller in size than those producing female progeny. 3. Female wasps attack and oviposit on the largest leafminer larvae available and whether a host is large or small depends upon the size of the other hosts attacked. 4. Diglyphus begini females adjust the thre:shold size for the change‐over in sex allocation relative to the size of hosts attacked; however, the sex ratio is maintained at between 60% and 70% males. 5. The patterns observed in these glasshouse studies are not due to sex‐specific differential mortality or superparasitism. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：391 / 399

页数：9

共 39 条

[1] SEX-RATIO EVOLUTION WHEN FITNESS VARIES [J].