Navigation Links
Aggression prevents the better part of valor ... in fig wasps

Published online in the Royal Society journal Biology Letters, the study confirms that placid male pollinator fig wasps work together to chew an escape tunnel for their females, before crawling back into the fig to die the non-pollinating variety are too busy fighting each other to help.

"Male insects can cooperate to attract the attention of females or to ensure that they are successful in mating, but I don't know of any other male insects which exhibit post-mating teamwork like this," says Dr Steve Compton from the Faculty of Biological Sciences.

Fig trees are vital for rainforest ecosystems. Producing fruit all year, more birds and animals feed on them than on any other plant in the rainforest. There are more than 850 types of fig tree, each pollinated by a single uniquely adapted type of fig wasp.

The research team examined some 60,000 individual fig flowers in the laboratory, each containing either pollinating fig wasps or parasitic fig wasps. All figs contained many females but alongside these, some contained a single male and others contained several males.

The hatched young of both types mate with each other before the females attempt to escape, leaving the males to die inside the fig. "Neither type of fig wasp female is strong enough to make their own way out, so they need help from the males to do this," says Dr Compton.

Escape rates for pollinator wasps were consistently high and increased when more males were present. When only one parasitic fig wasp was present, it was just as successful as the pollinators in chewing an escape route after mating, but when several males were present, the success rates plummeted.

The study also suggests that the ability of males to cooperate is hampered by innate aggression. Of the two groups of fig wasps those that pollinate fig trees and non-pollinators, which are parasites of the tree only the parasitic wasps fight more for the right to mate with females, and this group were far less able to work together.

"It would seem that male parasitic fig wasps are unable to switch off the hard-wired aggression needed to successfully mate to cooperate with each other, even when their genetic investment is at stake," says Dr Compton. "Pollinators' teamwork may be prompted because of the likelihood of genetic connection to the mated females, but the parasitic fig wasps were in the same situation."

Dr Compton believes the successful collaboration between the pollinating male fig wasps studied is likely to be normal for all pollinator fig wasps. He hopes to study a highly aggressive species of pollinators, where males fight intensely, often to death. "This will shed light on whether the cooperation is present in all pollinators, or if aggressive behaviour is too difficult to switch off after mating," he says.


Contact: Jo Kelly
University of Leeds

Related biology news :

1. Good relationship with teacher can protect first graders from aggression
2. Squid pheromone sparks extreme aggression on contact
3. Researchers find link between sugar, diabetes and aggression
4. Fearless children show less empathy, more aggression
5. Tryptophan-enriched diet reduces pig aggression
6. Small male chimps use politics, rather than aggression, to lead the pack, U of Minnesota study says
7. The Evolution of Human Aggression: Feb. 25-27 conference
8. U of Minnesota researcher finds link between aggression, status and sex
9. Enzyme boosts metabolism, prevents weight gain in mice
10. A coating that prevents barnacles forming colonies
11. Powerful antioxidant resveratrol prevents metabolic syndrome in lab tests: U of A study
Post Your Comments:
Related Image:
Aggression prevents the better part of valor ... in fig wasps
(Date:10/27/2015)... 27, 2015 In the present market scenario, ... for various industry verticals such as banking, healthcare, defense, ... growing demand for secure & simplified access control and ... as hacking of bank accounts, misuse of users, , ... as PC,s, laptops, and smartphones are expected to provide ...
(Date:10/27/2015)... SAN JOSE, Calif. , Oct. 27, 2015 /PRNewswire/ ... human interface solutions, today announced that Google has adopted ... family of touch controller solutions to power its newest ... Nexus 6P by Huawei. --> ... ecosystem partners like Google to provide strategic collaboration in ...
(Date:10/26/2015)... and LAS VEGAS , Oct. 26, ... , an innovator in modern authentication and a founding ... the launch of its latest version of the Nok ... organizations to use standards-based authentication that supports existing and ... Authentication Suite is ideal for organizations deploying customer-facing applications ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... Nov. 24, 2015  Asia-Pacific (APAC) holds the ... (CRO) market. The trend of outsourcing to low-cost ... but higher volume share for the region in ... however, margins in the CRO industry will improve. ... ( ), finds that the market ...
(Date:11/24/2015)... , Nov. 24, 2015 Halozyme Therapeutics, Inc. (NASDAQ: ... in New York on Wednesday, December 2 ... Torley , president and CEO, will provide a corporate overview. ... York at 1:00 p.m. ET/10:00 a.m. PT . ... relations, will provide a corporate overview. --> th ...
(Date:11/24/2015)... ... November 24, 2015 , ... ... the year and one of the premier annual events for pharmaceutical manufacturing: 2015 ... 8–11 November 2015, where ISPE hosted the largest number of attendees in more ...
(Date:11/24/2015)... 24, 2015 --> ... report "Oligonucleotide Synthesis Market by Product & Services (Primer, ... Diagnostic, DNA, RNAi), End-User (Research, Pharmaceutical & Biotech, Diagnostic ... the market is expected to reach USD 1,918.6 Million ... a CAGR of 10.1% during the forecast period. ...
Breaking Biology Technology: