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New species of spider wasp may use chemical signals from dead ants to protect nest

Date:
July 2, 2014
Source:
PLOS
Summary:
A new species of spider wasp, the 'Bone-house Wasp,' may use chemical cues from dead ants as a nest protection strategy. Wasps use a wide variety of nest protection strategies, including digging holes or occupying pre-existing cavities such as in wood.

This image depicts a 'bone house' wasp nest protection overview
Credit: Staab et al, doi:10.1371/journal.pone.0101592; CC-BY

A new species of spider wasp, the 'Bone-house Wasp,' may use chemical cues from dead ants as a nest protection strategy, according to a recent study published July 2, 2014 in the open-access journal PLOS ONE by Michael Staab from University of Freiburg, Germany, and his colleagues from China and Germany.

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Wasps use a wide variety of nest protection strategies, including digging holes or occupying pre-existing cavities such as in wood. Previous studies showed that the nests of cavity-nesting wasps contain several brood cells separated by thin walls of plant debris, resin, or soil. Once the females have finished constructing the nest, laying eggs, and providing food, they construct an outermost vestibular cell to close the nest. After construction, female wasps abandon the brood and do not care for their offspring anymore. Nest protection strategies play a central role in brood survival, and in this study, scientists interested in better understanding these strategies collected ~800 nests of cavity-nesting wasps with ~1900 brood cells belonging to 18 species in South-East China.

The scientists found a nesting behavior previously unknown in the entire animal kingdom: in over 70 nests they found an outer vestibular cell filled with dead ants. The species constructing these ant-filled vestibular cell was so far unknown to science and was described in the same study as the 'Bone-house Wasp' (Deuteragenia ossarium), after graveyard bone-houses or ossuaries. The scientists also found lower parasitism rates in "Bone-house" nests than in nests of similar cavity-nesting wasps. The authors suggest that D. ossarium nests are less vulnerable to natural enemies, potentially supporting the outer cell's role in defense, which most likely involves chemical cues emanating from the dead ants used as nest-building material.

Dr. Staab added, "Our discovery demonstrates in an impressive way, what fascinating strategies of offspring-protection have evolved in the animal kingdom."


Story Source:

The above story is based on materials provided by PLOS. Note: Materials may be edited for content and length.


Journal Reference:

  1. Michael Staab, Michael Ohl, Chao-Dong Zhu, Alexandra-Maria Klein. A Unique Nest-Protection Strategy in a New Species of Spider Wasp. PLoS ONE, 2014; 9 (7): e101592 DOI: 10.1371/journal.pone.0101592

Cite This Page:

PLOS. "New species of spider wasp may use chemical signals from dead ants to protect nest." ScienceDaily. ScienceDaily, 2 July 2014. <www.sciencedaily.com/releases/2014/07/140702151425.htm>.
PLOS. (2014, July 2). New species of spider wasp may use chemical signals from dead ants to protect nest. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2014/07/140702151425.htm
PLOS. "New species of spider wasp may use chemical signals from dead ants to protect nest." ScienceDaily. www.sciencedaily.com/releases/2014/07/140702151425.htm (accessed December 22, 2014).

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