Navigation Links
White silk wrappings key to female spider's heart
Date:2/3/2014

It's not only what's inside the nuptial gift that a potential suitor brings to a female Paratrechalea ornata spider that counts. It's the whole package, white silk wrappings and all, that can give one male spider the edge over another. So say Mariana Trillo, Valentina Melo-Gonzlez and Mara Jos Albo of the Instituto de Investigaciones Biolgicas Clemente Estable in Uruguay, who carried out the first study to look at the role of silk wrappings during the courtship and mating of this South American semi-aquatic spider. The findings were published in Springer's journal Naturwissenschaften The Science of Nature.

The Paratrechalea ornata spider is one of many animals and especially invertebrates that use nuptial gift-giving during courtship and mating. During mate searching, males of this species walk with vibrating forelegs and feeler-like pedipalps, while carrying prey wrapped in white silk in their mouth parts.

To find out more about this ceremony, Trillo's team collected spiders from the Santa Lucia River in Uruguay and ran a set of experiments in their laboratory in Montevideo. In one experiment, the mouth parts of some males were painted white, and others not. Females exposed to males with white mouth parts were more active, showed more physical contact and spent more time in front of them. They also accepted the matings earlier, and with more frequency than those exposed to males without paint.

The researchers therefore believe that the white coloring of the silk itself holds the big appeal for female spiders. This highlights the importance of visual cues during courtship and mate choice in Paratrechalea ornata. Also, Trillo's team does not believe that white is just a random choice for this spider. Members of this species are most active during sunset and at night, when bright or white objects stand out over longer distances compared to black ones. The white wrapping therefore could make it easier for a female to spot a male over a distance and to see if he is carrying a gift or not.

Trillo's team also found that gift wrapping is indeed a way in which females can judge a male's body condition, and therefore its suitability to mate with. Males in poor condition produced poorly constructed and wrapped gifts, while males in better shape added more silk to the package, which made it also appear whiter.

"Females evaluate the physical condition of a male based on his silk wrapping performance, and how the gifts he brings look," Trillo summarizes. "Also, silk wrapping is a condition dependent trait and most probably allows a Paratrechalea ornata female to acquire information about her potential mate, including body condition and quality."


'/>"/>
Contact: Joan Robinson
joan.robinson@springer.com
49-622-148-78130
Springer
Source:Eurekalert  

Related biology news :

1. White House lauds ONR-funded researchers for early success
2. New study finds extreme longevity in white sharks
3. Radiocarbon dating suggests white sharks can live 70 years and longer
4. Genome scale view of great white shark uncovers unexpected and distinctive features
5. Defending food crops: Whitefly experimentation to prevent contamination of agriculture
6. Fungus that causes white-nose syndrome in bats proves hardy survivor
7. How cancer spreads: Metastatic tumor a hybrid of cancer cell and white blood cell
8. DNA sequencing uncovers secrets of white cliffs of Dover
9. Dont judge the nutrient content of white vegetables by color alone
10. Positive effect of white button mushrooms when substituted for meat on body weight and composition changes during weight loss and weight maintenance
11. Great white sharks
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
White silk wrappings key to female spider's heart
(Date:4/19/2016)... 2016 The new GEZE SecuLogic ... web-based "all-in-one" system solution for all door components. It ... the door interface with integration authorization management system, and ... The minimal dimensions of the access control and the ... installations offer considerable freedom of design with regard to ...
(Date:4/15/2016)... April 15, 2016 Research ... Gait Biometrics Market 2016-2020,"  report to their offering.  ... ) , ,The global gait biometrics market is ... during the period 2016-2020. Gait analysis ... can be used to compute factors that are ...
(Date:4/13/2016)... 13, 2016  IMPOWER physicians supporting Medicaid patients in ... new clinical standard in telehealth thanks to a new ... higi platform, IMPOWER patients can routinely track key health ... mass index, and, when they opt in, share them ... to a local retail location at no cost. By ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... NC (PRWEB) , ... June 23, 2016 , ... In ... University Hospital in Denmark detail how a patient who developed lymphedema after being treated ... tissue. The results could change the paradigm for dealing with this debilitating, frequent side ...
(Date:6/23/2016)...  Blueprint Bio, a company dedicated to identifying, protecting ... has closed its Series A funding round, according to ... "We have received a commitment from Forentis Fund that ... meet our current goals," stated Matthew Nunez . ... complete validation on the current projects in our pipeline, ...
(Date:6/23/2016)... 2016 On Wednesday, June 22, 2016, ... 0.22%; the Dow Jones Industrial Average edged 0.27% lower to ... down 0.17%. Stock-Callers.com has initiated coverage on the following equities: ... (NASDAQ: NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ... BIND ). Learn more about these stocks by accessing their ...
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory Compliance Associates® Inc. (RCA), ... free webinar on Performing Quality Investigations: Getting to Root Cause. ... no charge. , Incomplete investigations are still a major concern to the Regulatory ...
Breaking Biology Technology: