Grazing-induced plant defences that reduce palatability to herbivores are widespread in terrestrial plants and seaweeds, but they have not yet been reported in seagrasses. We investigated the ability of two seagrass species to induce defences in response to direct grazing by three associated mesograzers. Specifically, we conducted feeding-assayed induction experiments to examine how mesograzer-...

Autonomie temperature regulation in crustaceans has been the subject of various studies. These included measurements of body temperature (e.g., Edney, 1951a, 1953; Warburg, 1965), lethal limits of ambient temperature (e.g., Edney, 1964; Orr, 1955), water loss by evaporation (e.g., Edney, 1951b; Warburg, 1965), and respiratory metabolism (e.g., Demeusy, 1957; Edwards & Irving, 1943). Behavioral ...

This paper describes a study of behavioural response in terrestrial isopod Oniscus asellus when offered two food pellets of different quality. One group had a choice of sterilised food and food pellets covered with mould. The other group had a choice of uncontaminated and cadmium-dosed food. During the behavioural test, the animals were monitored by a video camera and each visit to food pellets...

Water balance of the terrestrial isopod, Armadillidium vulgare, was investigated during conglobation (rolling-up behavior). Water loss and metabolic rates were measured at 18 ± 1°C in dry air using flow-through respirometry. Water-loss rates decreased 34.8% when specimens were in their conglobated form, while CO2 release decreased by 37.1%. Water loss was also measured gravimetrically at humidi...