Navigation Links
Aussie wasp on the hunt for redback spiders
Date:9/11/2012

University of Adelaide researchers say a small wasp that scientists had forgotten about for more than 200 years is now making a name for itself as a predator of Australia's most common dangerous spider, the redback.

The wasp (Agenioideus nigricornis) was first described scientifically in 1775 by Danish entomologist Johan Christian Fabricius, thanks to samples collected in Australia during Captain Cook's first great voyage (1768).

"Since then, scientists have largely forgotten about the wasp," says Professor Andy Austin from the University of Adelaide's Australian Centre for Evolutionary Biology & Biodiversity. "It is widespread across Australia and can be found in a number of collections, but until now we haven't known the importance of this particular species."

The wasp is now being dubbed the "redback spider-hunting wasp" after a family in Beaconsfield, Western Australia, discovered one of them with a paralyzed redback spider in their back yard.

Florian Irwin, then aged 9, spotted the wasp dragging the spider several meters to its nest, and his father, Dr Peter Irwin, photographed the event and kept the specimens. Peter, who is an Associate Professor at Murdoch University, contacted the Western Australian Museum about the discovery; the Museum alerted Professor Austin and research fellow Dr Lars Krogmann at the University of Adelaide.

"The Museum knew we were doing research into the Agenioideus, which belongs to the family Pompilidae, the spider-hunting wasps. Little is known about them, despite various species of Agenioideus being distributed throughout the world," Professor Austin says.

"We're very excited by this discovery, which has prompted us to study this species of wasp more closely. It's the first record of a wasp preying on redback spiders and it contributes greatly to our understanding of how these wasps behave in Australia."

With a body less than a centimeter in length, an adult redback spider-hunting wasp is no bigger than its prey. It stings and paralyses the redback spider and drags it back to its nest, where the wasp lays an egg on it. The spider remains alive but is paralyzed. Once the egg hatches, the larval wasp feeds on the spider.

The redback spider (Latrodectus hasselti) is an Australian relative of North America's black widow spider.

"The redback spider is notorious in Australia, and it has spread to some other countries, notably Japan and New Zealand. Redbacks are one of the most dangerous species in Australia and they're mostly associated with human dwellings, which has been a problem for many years," Professor Austin says.

"The redback spider-hunting wasp is doing its part to keep the population of redback spiders down, but it doesn't hunt all the time and is unlikely to completely eradicate the spiders."


'/>"/>
Contact: Professor Andy Austin, University of Adelaide
andy.austin@adelaide.edu.au
61-883-138-240
University of Adelaide
Source:Eurekalert  

Related biology news :

1. Flying jewels spell death for baby spiders
2. Crabs, insects and spiders vulnerable to oil spill, but also resilient
3. Velvet spiders emerge from underground in new cybertaxonomic monograph
4. Vampire jumping spiders identify victims by their antennae
5. Are brown widows displacing black widow spiders around southern California homes?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Aussie wasp on the hunt for redback spiders
(Date:3/28/2017)... , March 28, 2017 The ... Hardware (Camera, Monitors, Servers, Storage Devices), Software (Video Analytics, ... Region - Global Forecast to 2022", published by MarketsandMarkets, ... 2016 and is projected to reach USD 75.64 Billion ... and 2022. The base year considered for the study ...
(Date:3/24/2017)... 24, 2017 The Controller General of Immigration from ... Abdulla Algeen have received the prestigious international IAIR Award for the ... Continue Reading ... ... Controller Abdulla Algeen (small picture on the right) have received the IAIR ...
(Date:3/23/2017)... The report "Gesture Recognition and Touchless Sensing Market by Technology (Touch-based ... to 2022", published by MarketsandMarkets, the market is expected to be worth USD ... 2022. Continue Reading ... ... ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... and LAGUNA HILLS, Calif. , Oct. ... Cancer Research, London (ICR) and University ... SKY92, SkylineDx,s prognostic tool to risk-stratify patients with multiple myeloma ... MUK nine . The University of Leeds ... partly funded by Myeloma UK, and ICR will perform the ...
(Date:10/10/2017)... ... 2017 , ... San Diego-based team building and cooking events company, Lajollacooks4u, has ... The bold new look is part of a transformation to increase awareness, appeal to ... period. , It will also expand its service offering from its signature gourmet cooking ...
(Date:10/10/2017)... 10, 2017 International research firm Parks Associates announced ... at the TMA 2017 Annual Meeting , October 11 in ... residential home security market and how smart safety and security products impact ... Parks Associates: Smart Home ... "The residential security market has ...
(Date:10/9/2017)... DIEGO , Oct. 9, 2017  BioTech ... biological mechanism by which its ProCell stem cell ... critical limb ischemia.  The Company, demonstrated that treatment ... amount of limbs saved as compared to standard ... the molecule HGF resulted in reduction of therapeutic ...
Breaking Biology Technology: