Gelatinous organisms apparently play a central role in deep pelagic ecosystems, but lack of observational methodologies has restricted information on their behaviour. We made acoustic records of diel migrating jellyfish Periphylla periphylla forming small, ephemeral groups at the upper fringe of an acoustic scattering layer consisting of krill. Groups of P. periphylla were also documented photo...

In July 2020, Michael Taborsky officially retired as Professor in Behavioural Ecology at the University of Bern, Switzerland. His scientific life has been, and still is devoted to revealing fundamental principles social evolution by natural selection, based on conflict cooperation among individuals. Colleagues, collaborators students celebrate this occasion with a symposium behaviour September ...

credence goods market is one of the markets that the asymmetric information has transformed it to a missing market. those goods and services that the applicant cannot determine the exact amount of their expenses due to the asymmetric information are called credence goods. from the economists' perspective, transaction in a market where participants are ignorant about each other is a game wi...