Results 101 to 110 of about 564 (149)
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Teratocytes and their functions in parasitoids
Current Opinion in Insect Science, 2014Some endoparasitoid wasps (Hymenoptera) produce teratocytes, which are a type of cell that is released into host insects when wasp eggs hatch. In this short review I first summarize the different taxa of wasps that produce teratocytes, the embryonic origin of these cells, and key features of teratocyte growth.
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Searching for Food or Hosts: The Influence of Parasitoids Behavior on Host–Parasitoid Dynamics
Theoretical Population Biology, 1997A host-parasitoid system with overlapping generations is considered. The dynamics of the system is described by differential equations with a control parameter describing the behavior of the parasitoids. The control parameter models how the parasitoids split their time between searching for hosts and searching for non-host food.
Křivan, Vlastimil, Sirot, Etienne
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Egg Load Evolution in Parasitoids
The American Naturalist, 2000Parasitic wasps lay their eggs in or on other insects. Allocation of resources to reproduction (eggs) and survival (life span) should maximize reproductive success, but stochasticity in the number of hosts encountered precludes an exact match of allocation with reproductive opportunity.
Ellers, J. +2 more
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Parasitoid Foraging and Learning
1995The diminutive size of most parasitoids undoubtedly has limited their choice as subjects for behavioral study, despite their great diversity in lifestyles and reproductive strategies. The present chapter addresses their foraging behavior as influenced by learning.
Vet, L.E.M., Lewis, W.J., Cardé, R.T.
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What determines host range in parasitoids? An analysis of a tachinid parasitoid community
Oecologia, 2003Despite the vast diversity of parasitic insects and their importance in natural and agricultural communities, our knowledge of what determines their patterns of association with hosts remains sparse. Unlike most parasites that tend to be specialized, parasitoid flies in the family Tachinidae exhibit a broad spectrum of host-specificity, with many ...
John O, Stireman, Michael S, Singer
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Dynamic Complexities in a Host-Parasitoid System with Aggregated Parasitoid
2009 First International Conference on Information Science and Engineering, 2009The effect of aggregated parasitoid on a host-parasitoid system are investigated qualitatively by computer simulation. Our numerical simulations show that the aggregation of parasitoid can stabilize the population dynamics when the density-dependent effects of host is weak, while it can also destabilize the system when the density-dependent effect of ...
Huawei Dai +3 more
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Parasitoids, polydnaviruses and endosymbiosis
Parasitology Today, 1990Symbiotic associations traditionally have been treated as evolutionary curios rather than as a major source of evolutionary innovation. Recent research on a wide variety of organisms is changing this view and is breaking down the barriers between the traditional categories of parasitism, commensalism and mutualism, to produce a more flexible view of ...
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Parasitoid Competition and the Dynamics of Host-Parasitoid Models
The American Naturalist, 1988The standard host-parasitoid models assume that each parasitized host yields the same number of parasitoid progeny; but in many parasitoid species, the number of progeny per host depends on the number of times that host was encountered. I present a family of new host-parasitoid models incorporating this encounter-density-dependent variability in ...
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Parasitoid aggregation and interference in host–parasitoid dynamics
Ecological Entomology, 20161. Parasitoids do not distribute themselves evenly among available patches, which has an important bearing on the dynamics of host–parasitoid interactions. This study examined the density‐dependent nature of aggregation of the parasitoid D irhinus giffardii
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