Stimulated by a female pheromone, a crab male will grasp a female and carry her, thus protecting her during the period around her moulting. Mating is possible only during a short time after the moult.
With the antennae to the ground, the female shore crab hunts for prince charming. The olfactory organs are contained within the antennae of crabs. To the shore crab, odours and tastes form the letters of the language of love. The role of chemical communication in the love life of shore crabs has been charted in a new dissertation from Lund University in Sweden.
Mattias Ekerholm at the department of Cell and Organism Biology, Lund University in Sweden has studied the role of odours in shore crab mating. The female needs to find a male quickly, since she can only mate during a brief period directly after shedding her old shell ( i.e. moulting). She sniffs her way to a group of males competing for dominance. Following the scent trail of a dominant male, she also tries to avoid other males. Once near the male, she is overwhelmed by his odour, and rises up on tip-toe at the same time as she pumps her urine towards him. The female urine contains a pheromone that immediately makes the male respond. Mattias describes mating the following way:
- Now the male also starts walking around on tip-toe. With claws extended, he tries to look as impressive as possible. He has picked up the scent of the female. He then sniffs and tastes his way along her scent trail and, after a while he manages to find her.
Göran Frankel | alfa
Listening in: Acoustic monitoring devices detect illegal hunting and logging
14.12.2017 | Gesellschaft für Ökologie e.V.
How fires are changing the tundra’s face
12.12.2017 | Gesellschaft für Ökologie e.V.
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
14.12.2017 | Health and Medicine
14.12.2017 | Physics and Astronomy
14.12.2017 | Life Sciences