Navigation Links
Survival of the fittest: Predator wasps breed at the expense of spider juveniles
Date:2/4/2013

Two wasp species, Calymmochilus dispar and Gelis apterus, have been recorded as parasitoids on ant-eating spiders in a study published in the open access journal ZooKeys. The host spider, Zodarion styliferum, belongs to the largest genus of predominantly ant-eating spiders. Their distribution area includes Europe, Asia and North Africa, significantly with at least 35 species reported for the Iberian Peninsula only, marking a record in numbers in Portugal, where this study was conducted.

Available data on the biology of the host spider shows that all species of the genus Zodarion are compulsory ant eaters. What is interesting is that these spiders perform aggressive mimicry, i.e. disguise as ants to help them in their hunt and to capture their prey. These crafty hunters are often nocturnal wanderers and mainly active in twilight.

During the day, these spiders remain hidden in carefully built igloo-shaped stone retreats that are attached to the underside of rocks or dead wood. The igloos provide protection against unfavourable environmental conditions and enemies such as ants.

Despite these evolutionary advancements in the fight for survival, however, the Z. styliferum spider turns out to be an easy victim for wasp species in their strive for reproduction.

The predatory wasp attacks during daylight when the spiders are inactive. The females of the parasitoid species attack the hosts in the shelter of their igloo, penetrating the walls with their long ovipositors. When collected for this study, the wasp larvae were attached to the abdomen of an immobilised spider juvenile, which they used as food for their own development.

Apart from feeding on the juveniles, the peculiar home of the ant-eating host provides another convenience for the parasites. The larva of G. apterus makes a cocoon inside the spider igloo before pupation. The other species (C. dispar), however, does not create a cocoon. Rather, it takes advantage of the already built spider igloo to help protect the bare larvae inside.

Such parasitoid behavior is common among wasp species. The author of the original research article, Dr. Korenko from the Department of Agroecology and Biometeorology of the Czech University of Life Sciences explains: "Several groups of Hymenoptera develop on spider hosts feeding on the flesh of the spider or on its eggs. The parasitoids attack a number of spiders ranging from ground dwelling and fast moving hunters like wolf spiders to web spiders such as orb-web weavers that stay on webs during most of their life."


'/>"/>

Contact: Stanislav Korenko
korenko.stanislav@yahoo.com
Pensoft Publishers
Source:Eurekalert  

Related biology news :

1. Survival of the fittest -- ESF hosts session on the challenges of life in extreme environments
2. UC research: Saving habitat key to songbirds survival
3. Researchers have identified a gene with a key role in neuronal survival
4. Intensive kidney dialysis indicates better survival rates than conventional dialysis
5. Selenium impacts honey bee behavior and survival
6. Cardio fitness levels of breast cancer patients may affect survival
7. B cell survival holds key to chronic graft vs. host disease
8. Nanoparticles added to platelets double internal injury survival rate
9. Survival without water: A key trait of an aquatic invader to spread
10. Scientists identify new gene that influences survival in ALS
11. Antibiotic residues in sausage meat may promote pathogen survival
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Survival of the fittest: Predator wasps breed at the expense of spider juveniles
(Date:5/24/2016)... IRVINE, Calif. , May 24, 2016 Ampronix facilitates superior patient care ... LMD3251MT  3D medical LCD display is the latest premium product recently added to ... ... ... Sony 3d Imaging- LCD Medical Display- Ampronix News ...
(Date:5/9/2016)... 9, 2016 Elevay is currently ... expanding freedom for high net worth professionals seeking travel ... globally connected world, there is still no substitute for ... duplicate sealing your deal with a firm handshake. This ... taking advantage of citizenship via investment programs like those ...
(Date:4/26/2016)... BANGALORE, India and LONDON ... Infosys Finacle, part of EdgeVerve Systems, a ... ), and Onegini today announced a partnership to ... banking solutions.      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ... banks to provide their customers enhanced security to ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... ... launch of the Supplyframe Design Lab . Located in Pasadena, Calif., the ... future of how hardware projects are designed, built and brought to market. , ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... In a ... Hospital in Denmark detail how a patient who developed lymphedema after being treated for ... The results could change the paradigm for dealing with this debilitating, frequent side effect ...
(Date:6/23/2016)... June 23, 2016  Blueprint Bio, a company dedicated ... the medical community, has closed its Series A funding ... . "We have received a commitment from ... we need to meet our current goals," stated ... the runway to complete validation on the current projects ...
(Date:6/23/2016)... On Wednesday, June 22, 2016, the NASDAQ Composite ... Jones Industrial Average edged 0.27% lower to finish at 17,780.83; ... has initiated coverage on the following equities: Infinity Pharmaceuticals Inc. ... NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ARLZ ), ... more about these stocks by accessing their free trade alerts ...
Breaking Biology Technology: