Conductivity is the intrinsic property of sea water from which salinity can be determined, and measurement a regulatory requirement. This work aimed at developing conductivity sensor for Ocean Observation applications. The concept capacitive coupling attempted in combination with contact electrodes while designing probe eliminates polarization lead, or electrode contamination issues associated ...

—Three species of nephropid lobsters have been recognized in the genus Homarus: the American and European lobsters, H. americanus and H. gammarus of the northwestern and northeastern Atlantic, respectively, and the Cape lobster of South Africa, H. capensis, few specimens of which have been studied until recently. Analysis of new specimens allows reconsideration of the systematic status of this ...

Epizootic shell disease (ESD) in American lobsters Homarus americanus is the bacterial degradation of the carapace resulting in extensive irregular, deep erosions. The disease is having a major impact on the health and mortality of some American lobster populations, and its effects are being transferred to the economics of the fishery. While the onset and progression of ESD in American lobsters...

SYNOPSIS. The Earth’s magnetic field provides a pervasive source of directional information used by phylogenetically diverse marine animals. Behavioral experiments with sea turtles, spiny lobsters, and sea slugs have revealed that all have a magnetic compass sense, despite vast differences in the environment each inhabits and the spatial scale over which each moves. For two of these animals, th...

This study examined whether serotonin levels in the brain of the American lobster, Homarus americanus, are under circadian control. Using high-performance liquid chromatography and semi-quantitative immunocytochemical methods, we measured serotonin levels in the brains of lobsters at six time points during a 24-h period. Lobsters were maintained for 2 weeks on a 12 h:12 h light:dark cycle follo...

In this study we describe, the first microsporidian parasite from nephropid lobsters. Metanephrops challengeri were captured from an important marine fishery situated off the south coast of New Zealand. Infected lobsters displayed an unusual external appearance and were lethargic. Histology was used to demonstrate replacement of skeletal and other muscles by merogonic and sporogonic stages of t...