Feeds

Crayfish enjoy a bit of sub-dom: official

Scientists probe 'humping' behaviour

Secure remote control for conventional and virtual desktops

Scientists from Georgia State University have rather splendidly discovered that crayfish "act out elaborate rituals of dominance and submission", Reuters reports.

Specifically, Fadi Issa and Donald Edwards found said crustaceans "display... a complex ritual, when two males engaged in pseudocopulatory behaviour to signify their dominance relationship" which was followed by "a reduction in aggression and an increased likelihood of the subordinate's survival".

Indeed, this is not just a bit canine rolling on your back when the top dog's around - it's a matter of life or death for crayfish. The researchers noted that "lower-ranking crayfish that did not go along with another male's overtures were killed, dismembered, and partially eaten".

Issa and Edwards, who monitored sub-dom behaviour among a group of 20 males, said it was "most common when two strange males first met, and appeared to defuse tensions after a few days". They further explained: "These effects are similar to those of copulation between male and female crayfish, and such copulation can also begin with an aggressive encounter and has been seen as an extension of male dominance behaviour. Moreover, if the female refuses the male's attempts to mate, she can be killed."

The scientists concluded by saying "the findings in invertebrates showed such behaviour was common in the animal world and may have evolved more than once over time". This suggests a bit of sub-dom is "useful for survival", they added.

Issa and Edwards' findings are available in the journal Current Biology. We look forward to their forthcoming paper on Promiscuous lesbianism among spider crabs as a mechanism for social harmony. ®

Next gen security for virtualised datacentres

More from The Register

next story
Gigantic toothless 'DRAGONS' dominated Earth's early skies
Gummy pterosaurs outlived toothy competitors
Vulture 2 takes a battering in 100km/h test run
Still in one piece, but we're going to need MORE POWER
TRIANGULAR orbits will help Rosetta to get up close with Comet 67P
Probe will be just 10km from Space Duck in October
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
'Leccy racer whacks petrols in Oz race
ELMOFO rakes in two wins in sanctioned race
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
NASA's rock'n'roll shock: ROLLING STONE FOUND ON MARS
No sign of Ziggy Stardust and his band
Why your mum was WRONG about whiffy tattooed people
They're a future source of RENEWABLE ENERGY
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.