In two species of lobster, application of the biogenic amine, histamine (HA), to the soma of olfactory receptor cells suppressed both spontaneous and odour-evoked activity, as shown by electrophysiological recording from single cells. The action of HA was graded, reversible, specific to HA, and had a threshold between 0.1 and 1 mumol l-1. HA increased the conductance of the membrane, primarily ...

American lobsters Homarus americanus were exercised on an underwater treadmill at speeds from 1.7 to 8 m min-1 to determine the effects of exercise on heart rate, ventilation rate and acid-base status. Heart and ventilation rates showed almost instantaneous increases at the start of exercise, but the magnitude of the increase was not related to speed. Maximum heart rate was approximately 80-90 ...

An outbreak of shell disease in American lobster (Homarus americanus) over the past several years has generated a great deal of attention and concern regarding its causes and spread into New England coastal waters. An examination of the disease within Massachusetts state waters was conducted from 2000 through 2004. The overall average incidence observed in our data was 3% males and 8% females. ...

Our laboratory has developed several methods for the quantification of stress in crustaceans. An ELISA was developed for the crustacean hyperglycemic hormone (CHH) from the American lobster (Homarus americanus). It is sensitive to as little as 0.2 fmol of peptide. Increases in hemolymph CHH were observed under conditions of hypoxia, elevated temperature, and altered salinity. In addition, eleva...

Abstract Assessing size at maturity for European lobster Homarus gammarus across the North East Atlantic remains a fundamental knowledge gap this commercially valuable fishery. This study first time collates existing data on physiological of female H. Atlantic, including new from Scotland, Wales, and Isle Man. Physiological estimates were undertaken using 1309 lobsters 11 locations standardized...