The acoustic behaviour of the European spiny lobster Palinurus elephas (Fabricius, 1787) was examined in the absence or presence of predators or conspecifics. Observations were conducted in a tank equipped with digital video and acoustic monitoring and recording systems using 25 adult lobsters and 5 common octopuses Octopus vulgaris. Single lobsters or groups of 4 lobsters were studied for 2 h....

BACKGROUND Vision loss from glaucoma has traditionally been described as loss of "peripheral vision." In this prospective study, we aimed to improve our clinical understanding of the visual symptoms caused by glaucoma by asking patients specific detailed questions about how they see. METHODS Patients who were clinically diagnosed with various types and stages of glaucoma were included. All ha...

The concentrations of six metals (Ag, Cd, Cu, Hg, Pb, and Zn) were investigated and compared in three tissues (arms, digestive gland, and mantle) of three cephalopod species from the Tunisian waters: the common octopus (Octopus vulgaris), the common cuttlefish (Sepia officinalis), and the European squid (Loligo vulgaris). Whatever the species or the sites, the digestive gland displayed the high...

The concept of 'embodiment' and its implications for the evolution of cognitive capacities is emerging as a major issue in biology. Invertebrates have immensely diverse nervous structures and body plans, revealing the variety of solutions evolved by animals living successfully in all kinds of niches. Among invertebrates, the octopus is a special case because of its high cognitive abilities and ...

With gradual decline of global finfish resources, fisheries targeting cephalopods expanded. Yet, the stock assessment and management practice are frequently lacking, existing ones often remain poorly suited for cephalopod unique life-history. In light increasing ecological disturbances in marine ecosystems worldwide, assessing exploited species’ status response becomes vital devising effective ...

In this work, the effects of visible implant elastomer (VIE) tags on survival and body growth rate juvenile red octopus Octopus maya from Yucatan Peninsula were tested under controlled conditions. Juveniles with an average weight 1.14 g not affected by VIE within 30 days, so methodology is suggested as a useful tool to study life cycle aspects important fishery species.