pop~agenda~culture

“His response was to fight it with the only weapons at hand—passive resistance and open displays of contempt.” ― Kurt Vonnegut, The Sirens of Titan

Popular Science: Copulation with immature females increases male fitness in cannibalistic widow spiders | Biology Letters

http://rsbl.royalsocietypublishing.org/content/12/9/20160516 I bet the late model 40-70 something white feminists and Hillary voters are spinning webs round this story. Then, they’ll probably eat it.

Are brown widow male spiders all rapist pedohiles?! Or are they resisting their female peers tenency to eat them alive?


Copulation with immature females increases male fitness in cannibalistic widow spiders
M. Daniela Biaggio, Iara Sandomirsky, Yael Lubin, Ally R. Harari, Maydianne C. B. Andrade

Published 20 September 2016.DOI: 10.1098/rsbl.2016.0516

ArticleFigures & DataInfo & MetricseLetters PDF

Abstract
Copulatory cannibalism of male ‘widow’ spiders (genus Latrodectus) is a model example of the extreme effects of sexual selection, particularly in L. hasselti and L. geometricus where males typically facilitate cannibalism by females and mate only once. We show that these males can increase their reproductive success by copulating with final-instar, immature females after piercing the female’s exoskeleton to access her newly developed sperm storage organs. Females retain sperm through their final moult and have similar fecundity to adult-mated females. This is an adaptive male tactic because immature mating increases insemination success relative to adult mating (which predicts higher paternity) and moreover, rarely ends in cannibalism, so males can mate again. Although successful only during a brief period before the female’s final moult, males may employ this tactic when they associate with final-instar females in nature. Consistent with this, one-third of L. hasselti females collected as immatures in nature were already mated. Immature mating alters sexual selection on these otherwise monogynous males, and may explain male traits allowing facultative polygyny in Latrodectus. Since male cohabitation with immature females is common among invertebrates, immature mating may be a widespread, previously unrecognized mating tactic, particularly when unmated females are of high reproductive value.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Information

This entry was posted on September 25, 2016 by in Uncategorized.

We’re all so meta that the NSA targets our intellectual detritus.

MISCREANTS WHO DEFY ZIO-CHRISTO-ISLAMO MEDIA CONTROLL NARRATIVES OF ENDLESS WAR

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 14 other followers

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 14 other followers

Archives

Follow pop~agenda~culture on WordPress.com

THE TREASURE TROVE OF OBSCURE RAMBLINGS

Member of The Internet Defense League

%d bloggers like this: