Host behaviour and its influence on foraging and acceptance by the solitary parasitoid wasp,Venturia canescens (Hym: Ichneumonidae)

Entomophaga ◽  
1995 ◽  
Vol 40 (2) ◽  
pp. 193-210 ◽  
Author(s):  
J. A. Harvey ◽  
D. J. Thompson
Keyword(s):  
Parasitoid Wasp ◽  
Venturia Canescens ◽  
Solitary Parasitoid ◽  
Host Behaviour

Abdominal sensory equipment involved in external host discrimination in a solitary parasitoid wasp

2011 ◽  
Vol 74 (12) ◽  
pp. 1145-1153 ◽  
Author(s):  
MarlÈne Goubault ◽  
Anne Marie Cortesero ◽  
Chrystelle Paty ◽  
Julie Fourrier ◽  
Sonia Dourlot ◽  
...  
Keyword(s):  
Parasitoid Wasp ◽  
Host Discrimination ◽  
Solitary Parasitoid

Correlation between changes in host behaviour and octopamine levels in the tobacco hornworm Manduca sexta parasitized by the gregarious braconid parasitoid wasp Cotesia congregata

1997 ◽  
Vol 200 (1) ◽  
pp. 117-127 ◽  
Author(s):  
S Adamo ◽  
C Linn ◽  
N Beckage
Keyword(s):  
High Performance Liquid Chromatography ◽  
Manduca Sexta ◽  
High Performance ◽  
Parasitoid Wasp ◽  
Tobacco Hornworm ◽  
The Body ◽  
Larval Form ◽  
Cotesia Congregata ◽  
Host Behaviour ◽  
Increased Activity

The parasitoid wasp Cotesia congregata lays its eggs within the body of its host, the larval form of the tobacco hornworm Manduca sexta. Host behaviour appeared normal until approximately 8 h prior to the emergence of the parasitoids from their host at which time M. sexta feeding and locomotion declined irreversibly. This change in host behaviour may be to the advantage of the wasp since unparasitized M. sexta presented with wasp pupae ate them. Despite the decline in feeding and locomotion, hosts with emerged parasitoids had normal reflexes and showed no other signs of debilitation. Concomitant with the change in host behaviour, octopamine concentration measured using high-performance liquid chromatography with electrochemical detection (HPLC-ED) increased from 22.2±2.1 pg µl-1 to 143.7±7.8 pg µl-1 in the haemolymph of the host. In unparasitized M. sexta, however, increased octopamine levels were correlated with increased activity. We discuss possible explanations for the co-occurrence of high haemolymph octopamine levels and low behavioural arousal in parasitized M. sexta.

scholarly journals Poor adult nutrition impairs learning and memory in a parasitoid wasp

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hossein Kishani Farahani ◽  
Yasaman Moghadassi ◽  
Jean-Sebastien Pierre ◽  
Stéphane Kraus ◽  
Mathieu Lihoreau
Keyword(s):  
Learning And Memory ◽  
Cognitive Abilities ◽  
Sucrose Solution ◽  
Parasitoid Wasp ◽  
Learning Task ◽  
Higher Learning ◽  
Memory Retention ◽  
Venturia Canescens ◽  
Sucrose Solutions

AbstractAnimals have evolved cognitive abilities whose impairment can incur dramatic fitness costs. While malnutrition is known to impact brain development and cognitive functions in vertebrates, little is known in insects whose small brain appears particularly vulnerable to environmental stressors. Here, we investigated the influence of diet quality on learning and memory in the parasitoid wasp Venturia canescens. Newly emerged adults were exposed for 24 h to either honey, 20% sucrose solution, 10% sucrose solution, or water, before being conditioned in an olfactory associative learning task in which an odor was associated to a host larvae (reward). Honey fed wasps showed 3.5 times higher learning performances and 1.5 times longer memory retention than wasps fed sucrose solutions or water. Poor diets also reduced longevity and fecundity. Our results demonstrate the importance of early adult nutrition for optimal cognitive function in these parasitoid wasps that must quickly develop long-term olfactory memories for searching suitable hosts for their progeny.

scholarly journals Offspring sex ratio shifts of the solitary parasitoid wasp, Trichopria drosophilae (Hymenoptera: Diapriidae), under local mate competition

2018 ◽  
Vol 29 (2) ◽  
pp. 97-104 ◽  
Author(s):  
Jing Li ◽  
Yu Wang ◽  
Cheng-Jie Zhu ◽  
Min Zhang ◽  
Hao-Yuan Hu
Keyword(s):  
Sex Ratio ◽  
Parasitoid Wasp ◽  
Female Offspring ◽  
Mate Competition ◽  
Offspring Sex Ratio ◽  
Pupal Parasitoid ◽  
Offspring Sex ◽  
Local Mate ◽  
Solitary Parasitoid ◽  
Single Foundress

Localmate competition (LMC) models predict a female-biased offspring sex ratio when a single foundress oviposits alone in a patch and an increasing proportion of sons with increasing foundress number. We tested whether the solitary pupal parasitoid, Trichopria drosophilae (Hymenoptera: Diapriidae), adjusted offspring sex ratio with foundress number when parasitizing Drosophila melanogaster pupae. Mean number of female offspring was higher than that of males, with a male proportion of 26 ± 16% when only one foundress oviposited. However, male proportion reached 58 ± 26%, 48 ± 22%, and 51 ± 19% in three-, five and seven-foundress cohorts. That the male proportion of offspring increased with foundress number is consistent with LMC models.

scholarly journals Diploid male production correlates with genetic diversity in the parasitoid wasp Venturia canescens: a genetic approach with new microsatellite markers

2016 ◽  
Author(s):  
Marie Collet ◽  
Chloé Vayssade ◽  
Alexandra Auguste ◽  
Laurence Mouton ◽  
Emmanuel Desouhant ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Sex Determination ◽  
Extinction Risk ◽  
Habitat Type ◽  
Parasitoid Wasp ◽  
Habitat Destruction ◽  
Diploid Male ◽  
Diploid Males ◽  
Venturia Canescens ◽  
Captive Populations

AbstractSex determination is ruled by haplodiploidy in Hymenoptera, with haploid males arising from unfertilized eggs and diploid females from fertilized eggs. However, diploid males with null fitness are produced under Complementary Sex Determination (CSD), whenindividuals are homozygous for this locus. Diploid males are expected to be more frequent in genetically eroded populations (such as islands and captive populations), as genetic diversity at the csd locus should be low. However, only a few studies have focused on the relation between population size, genetic diversity and the proportion of diploid males in the field. Here, we developed new microsatellites markers in order to assess and compare genetic diversity and diploid male proportion in populations from three distinct habitat types (mainland, island or captive), in the parasitoid wasp Venturia canescens. Eroded genetic diversity and higher diploid male proportion were found in island and captive populations, and habitat type had large effect on genetic diversity. Therefore, diploid male proportion reflects the decreasing genetic diversity in small and isolated populations. Thus, Hymenopteran populations can be at high extinction risk due to habitat destruction or fragmentation.

scholarly journals Poor Adult Nutrition Impairs Learning and Memory in a Parasitoid Wasp

2021 ◽  
Author(s):  
Hossein Kishani Farahani ◽  
Yasaman moghaddassi ◽  
Jean-Sebastien Pierre ◽  
stephane kraus ◽  
Mathieu Lihoreau
Keyword(s):  
Learning And Memory ◽  
Cognitive Abilities ◽  
Sucrose Solution ◽  
Parasitoid Wasp ◽  
Learning Task ◽  
Higher Learning ◽  
Memory Retention ◽  
Fitness Costs ◽  
Venturia Canescens ◽  
Sucrose Solutions

Abstract Animals have evolved cognitive abilities whose impairment can incur dramatic fitness costs. While malnutrition is known to impact brain development and cognitive functions in vertebrates, little is known in insects, whose small brain appears particularly vulnerable to environmental stressors. Here, we investigated the influence of diet quality on learning and memory in the parasitoid wasp Venturia canescens. Newly emerged adults were exposed for 24h to either honey, sucrose solution 20%, sucrose solution 10%, or no food, before being conditioned in an olfactory associative learning task in which an odor (orange) was associated to a reward (host larvae). Wasps fed honey showed 3.5 times higher learning performances and 1.5 times longer memory retention times than wasps fed sucrose solutions and starved wasps. Poor diets also reduced longevity and fecundity. Our results demonstrate the importance of early adult nutrition for optimal cognitive function in these parasitoid wasps that must quickly develop olfactory memories for choosing high quality hosts for their progeny.

Sign in / Sign up

Export Citation Format

Share Document