Results 241 to 250 of about 7,986 (258)

Mating systems of parasitoid wasps

1997
ABSTRACT Parasitoid wasps are a large group of hymenopteran insects whose larvae develop by feeding on the bodies of other insects. The spatial distributions of both the hosts and the parasitoid larvae influence the mating systems found in these wasps.
James M. Cook, H. C. J. Godfray
openaire   +2 more sources

Reproductive Strategies in Parasitoid Wasps

The American Naturalist, 1973
In an effort to explain different reproductive strategies among parasitoid wasps, differences in potential fecundity of members of the family Ichneumonidae were compared in relation to the availability of the host and the probability of survival of the parasitoid once it was associated with the host.
openaire   +2 more sources

African fig wasp parasitoid communities

1994
Abstract What are fig trees and fig wasps? Fig trees are a group of approximately 850 species placed in the genus Ficus (Moraceae), and are characterized by their unique inflorescence-the fig. Around 105 Ficus species are found in Africa, where they range in size from small shrubs to huge rain forest emergents (Berg 1990; Berg and Wiebes
Compton, S.G., Rasplus, Jean Yves, Ware, A.B.   +2 more
openaire   +2 more sources

Short Interval Time Measurement by a Parasitoid Wasp [PDF]

Science, 1987
The number of eggs laid by the parasitoid wasp Trichogramma varies with host volume. The duration of the wasp's initial transit across the host surface during host examination is used to determine the number of eggs laid.
J. J. B. Smith, J. M. Schmidt
openaire   +2 more sources

Mixed sex allocation strategies in a parasitoid wasp

Oecologia, 1997
The sex allocation strategy of the parasitoid Laelius pedatus (Hymenoptera: Bethylidae) on different-sized hosts was investigated. The wasp lays from one to five eggs, and clutch size increases with host size. On the smallest hosts, single male eggs are laid, while on slightly larger hosts single female eggs are laid.
H. C. J. Godfray, Peter J. Mayhew
openaire   +3 more sources

Taxonomy of parasitoid wasps in China: An overview

Biological Control, 2014
Abstract The parasitoid Hymenoptera are one of the most important groups of natural enemies of agriculture and forestry pests and have been used as biological control agents in IPM programs for a long time. The systematic research on parasitoids and their associations with hosts lays a solid base for biological control of pests. Here we summarize the
Xue-Xin Chen, Jun-Hua He, C. van Achterberg, Jie Zeng, Pu Tang   +4 more
openaire   +2 more sources

Sperm stock and mating of males in a parasitoid wasp

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2007
AbstractHymenoptera are haplodiploid insects, consequently sex ratio depends on female's sperm management which itself arises from the reproductive capacity of neighbouring males. To study the influence of ageing on male reproductive potential, laboratory experiments were conducted on Dinarmus basalis (Hymenoptera, Pteromalidae) males, a tropical wasp ...
Christophe Bressac, David Damiens, Claude Chevrier   +2 more
openaire   +3 more sources

Selective information use in parasitoid wasps

Animal Biology, 2006
Abstract Foraging animals frequently have to decide where to search, what host or prey to accept, and when to leave a patch. To achieve optimal patch exploitation rates, foragers can base their decisions on information about the quality of the current patch and on an estimate of the quality of the entire habitat.
Thomas S. Hoffmeister, Andra Thiel
openaire   +2 more sources

Microsatellites for the parasitoid wasp Hyposoter horticola

Conservation Genetics Resources, 2015
We developed 14 microsatellite loci for the solitary parasitoid wasp Hyposoter horticola, an egg-larval endoparasitoid specialist of the Glanville fritillary butterfly Melitaea cinxia, in the Aland islands, Finland. The microsatellites were developed from a 454 sequencing enriched library.
Perttu Seppä, S. van Nouhuys, S. van Nouhuys, Christelle Couchoux, Christelle Couchoux   +4 more
openaire   +2 more sources

Sexual size dimorphism in parasitoid wasps

Biological Journal of the Linnean Society, 1987
Sexual dimorphism in body length and proportion of overlap between the ranges of body length for males and females were estimated for 361 species of parasitoid wasps from 21 families. In most species, females are generally larger than males, though the range of male and female sizes overlap. Species in the family Ichneumonidae differ significantly from
openaire   +2 more sources