Males more considerate than imagined
Male worms plug females after copulation as a form of 'gift', rather than to prevent them from mating again, as had previously been thought. Researchers writing in BioMed Central's open access journal Frontiers in Zoology found that plugged females mated just as often and were just as attractive as those who were unplugged, and that plugging ultimately improved female fitness. Nadine Timmermeyer worked with a team of researchers from the University of Tuebingen, Germany, to investigate the effects of copulatory plugs in the nematode worm Caenorhabditis remanei. She said, "Our results indicate that plugging neither affects the likelihood that a female is located by males, nor whether or not mating ensues. However, we found that plugging has a significant positive effect on egg production, suggesting that plugs may represent a beneficial act of a male towards its female partner rather than a competitive act between males".
Mating plugs have been documented for a broad range of animal groups, including insects, arachnids, reptiles, and rodents. In the worms studied, plugs consist of gelatinous mass deposited by the male onto the female's vulva at the end of copulation, which then hardens like glue. Speaking about possible ways that such a seal may benefit both males and females, Timmermeyer said "A plug may act as a seal, keeping sperm inside the female and preventing the entry of harmful pathogens. It may also contain substances that stimulate the female, or that have nutritious or antimicrobial properties".
Source: BioMed Central
- Males more considerate than imaginedfrom Science CentricTue, 2 Nov 2010, 11:10:32 EDT
- ScienceShot: Thanks for the Plugfrom Science NOWMon, 1 Nov 2010, 20:20:14 EDT
- Males more considerate than imaginedfrom PhysorgMon, 1 Nov 2010, 19:30:46 EDT
- Males more considerate than imagined -- at least, in nematode wormsfrom Science DailyMon, 1 Nov 2010, 19:20:12 EDT
Latest Science NewsletterGet the latest and most popular science news articles of the week in your Inbox! It's free!
Learn more about
Check out our next project, Biology.Net
From other science news sites
Popular science news articles
- Hearing quality restored with bionic ear technology used for gene therapy
- NASA satellites show drought may take toll on Congo rainforest
- Superconducting qubit array points the way to quantum computers
- Scientists identify source of mysterious sound in the Southern Ocean
- From liability to viability: Genes on the Y chromosome prove essential for male survival
- Criticism of violent video games has decreased as technology has improved, gamers age
- Hummingbirds' 22-million-year-old history of remarkable change is far from complete
- Research clarifies health costs of air pollution from agriculture
- Ancient 'spider' images reveal eye-opening secrets
- New research finds 'geologic clock' that helps determine moon's age