Various components of swimming performance were measured in uninfected Norway lobsters (Nephrops norvegicus) and compared to animals at different stages of infection by a parasitic dinoflagellate (Hematodinium sp.). Animals showed a progressive decline in overall swimming performance as infection severity increased, with reductions in the number of tail-flips performed, the number of swimming b...

Abstract The present study investigated the potential use of defatted black soldier fly ( Hermetia illucens ) meal as a protein source in formulated feed for juvenile lobsters, Panulirus ornatus . A total 160 heads lobsters with initial weight 0.24 ± 0.01 g and length 21.77 0.32 mm were distributed evenly into 16 rectangular fiberglass aquaria kept individually 8 weeks feeding experiment. Four ...

Emamectin benzoate, the active ingredient in SLICE®, targets the nervous system of arthropods. Ingestion of high doses causes ovigerous American lobsters Homarus americanus to molt before their eggs hatch. To determine the effect of repeated exposure to doses at or below the noobserved-effect level (NOEL) of a single exposure (NOEL: 0.12 μg g–1), ovigerous lobsters were given either a single do...

Lobsters (Homarus americanus) in the wild inhabit ocean waters where temperature can vary over a broad range (0-25 degrees C). To examine how environmental thermal variability might affect lobster physiology, we examine the effects of temperature and thermal change on the acid-base status of the lobster hemolymph. Total CO(2), pH, P(CO)2 and HCO(-)(3) were measured in hemolymph sampled from lob...

In spiny lobsters and other decapod crustaceans, odorant-mediated searching behavior patterns are driven primarily by chemosensory neurons in the antennules. Two groups of antennular chemosensory neurons can be distinguished on the basis of the sensilla that they innervate and their central projections: those that innervate the aesthetasc sensilla on the lateral flagella and project into the gl...

In southern New England, USA, shell disease affects the profitability of the American lobster Homarus americanus fishery. In laboratory trials using juvenile lobsters, exclusive feeding of herring Clupea harengus induces shell disease typified initially by small melanized spots that progress into distinct lesions. Amongst a cohabitated, but segregated, cohort of 11 juvenile lobsters fed exclusi...

Necrotizing hepatopancreatitis bacterium (NHPB) is an obligated intracellular bacteria causing severe hepatopancreatic damages and mass mortalities in penaeid shrimp. The worldwide distribution of penaeid shrimp as alien species threatens the life cycle of other crustacean species. The aim of the experiment was to evaluate the possibility of experimentally infecting the American lobster (Homaru...

In 1999, American lobsters, Homarus americanus, from western Long Island Sound (WLIS) experienced a significant mortality. In 2001 and 2004, the eyes and eyestalks of lobsters from WLIS and central LIS were examined for histopathological changes. Idiopathic lesions were identified in the ommatidia and optic nerve fibers proximal to the ommatidia in 29 (56%) of the lobsters from LIS. Lesions wer...

Clumps of highly-branched red algae Laurencia spp. serve as important settling habitat for postlarval spiny lobsters Panulvus argus and as residence for early benthic-stage juveniles. G ~ v e n choice between the 2 most abundant macrophytes in Florida Bay, Laurenna spp. and the seagrass Thalassia testudinum, postlarval and juvenile lobsters chose Laurencia spp. Postlarvae apparently use intrica...

A statement in the literature” that lobsters retain their original weight even after several months of fasting led to the present investigation. The constancy of body weight may be regarded as an index of physiological equilibrium, and its fluctuations indicat’c the internal condition of the organism. By the fall in body weight the normal course of a fast may be followed from day to day, just a...