The Hemolymph Bactericidin of American Lobster (Homarus americanus): Adsorption and Activation

1978 ◽  
Vol 35 (11) ◽  
pp. 1504-1507 ◽  
Author(s):  
Katsuyoshi Mori ◽  
James E. Stewart
Keyword(s):  
Key Words ◽  
Homarus Americanus ◽  
American Lobster ◽  
Aerococcus Viridans

The bactericidin of American lobster (Homarus americanus) hemolymph was adsorbed readily by representatives of two bacterial genera: a nonpathogen, Pseudomonas perolens, and the lobster pathogen Aerococcus viridans (var.) homari. Activation of the bactericidin by factor(s) secreted by the hemocytes can occur before adsorption and also after adsorption by bacteria. Although the lobster pathogen A. viridans (var.) homari is unaffected by the activated bactericidin, this lack of effect is not related to adsorption since this bacterium adsorbs the bactericidin as readily and completely as does the susceptible nonpathogen. Key words: lobster, Homarus americanus, plasma bactericidin, adsorption and activation, hemocytic activator, Pseudomonas perolens, Aerococcus viridans (var.) homari

Distance Chemoreception and Vision in the Selection of Prey by American Lobster (Homarus americanus)

1978 ◽  
Vol 35 (7) ◽  
pp. 1006-1008 ◽  
Author(s):  
R. W. M. Hirtle ◽  
K. H. Mann
Keyword(s):  
Response Time ◽  
Key Words ◽  
Mytilus Edulis ◽  
Sea Urchins ◽  
Carcinus Maenas ◽  
Homarus Americanus ◽  
Strongylocentrotus Droebachiensis ◽  
American Lobster ◽  
Selection Of

Lobsters responded positively to the waterborne odor of intact living crabs (Carcinus maenas), sea urchins (Strongylocentrotus droebachiensis), and mussels (Mytilus edulis). The frequency of response was higher and the response time shorter to crabs than to sea urchins or mussels. Lobsters also responded to the sight of moving crabs or moving sea urchins, but not to the sight of stationary specimens. Crabs are probably more attractive to lobsters because of their odor and their greater activity, compared with sea urchins or mussels. Key words: lobsters, prey, chemoreception, vision, crabs, sea urchins, movement, odor

Growth of juvenile American lobster Homarus americanus in a changing environment

2016 ◽  
Vol 557 ◽  
pp. 177-187 ◽  
Author(s):  
MD McMahan ◽  
DF Cowan ◽  
Y Chen ◽  
GD Sherwood ◽  
JH Grabowski
Keyword(s):  
Homarus Americanus ◽  
American Lobster ◽  
Changing Environment

Predicting bycatch hotspots based on suitable habitat derived from fishery-independent data

2020 ◽  
Vol 641 ◽  
pp. 159-175
Author(s):  
J Runnebaum ◽  
KR Tanaka ◽  
L Guan ◽  
J Cao ◽  
L O’Brien ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Gulf Of Maine ◽  
Homarus Americanus ◽  
Management Tool ◽  
American Lobster ◽  
Suitable Habitat ◽  
Climate Conditions ◽  
Suitability Index

Bycatch remains a global problem in managing sustainable fisheries. A critical aspect of management is understanding the timing and spatial extent of bycatch. Fisheries management often relies on observed bycatch data, which are not always available due to a lack of reporting or observer coverage. Alternatively, analyzing the overlap in suitable habitat for the target and non-target species can provide a spatial management tool to understand where bycatch interactions are likely to occur. Potential bycatch hotspots based on suitable habitat were predicted for cusk Brosme brosme incidentally caught in the Gulf of Maine American lobster Homarus americanus fishery. Data from multiple fisheries-independent surveys were combined in a delta-generalized linear mixed model to generate spatially explicit density estimates for use in an independent habitat suitability index. The habitat suitability indices for American lobster and cusk were then compared to predict potential bycatch hotspot locations. Suitable habitat for American lobster has increased between 1980 and 2013 while suitable habitat for cusk decreased throughout most of the Gulf of Maine, except for Georges Basin and the Great South Channel. The proportion of overlap in suitable habitat varied interannually but decreased slightly in the spring and remained relatively stable in the fall over the time series. As Gulf of Maine temperatures continue to increase, the interactions between American lobster and cusk are predicted to decline as cusk habitat continues to constrict. This framework can contribute to fisheries managers’ understanding of changes in habitat overlap as climate conditions continue to change and alter where bycatch interactions could occur.

Valorization of American lobster ( Homarus americanus ) cooking waters: preparation and characterization of a food ingredient

2021 ◽  
Author(s):  
Ariane Tremblay ◽  
Ronan Corcuff ◽  
Charles Goulet ◽  
Samuel B. Godefroy ◽  
Alain Doyen ◽  
...  
Keyword(s):  
Homarus Americanus ◽  
American Lobster ◽  
Food Ingredient

Predicting the winning or losing of symmetrical contests in the American lobster Homarus americanus (Milne-Edwards)

1997 ◽  
Vol 217 (1) ◽  
pp. 19-29 ◽  
Author(s):  
C. Vye ◽  
J.S. Cobb ◽  
T. Bradley ◽  
J. Gabbay ◽  
A. Genizi ◽  
...  
Keyword(s):  
Homarus Americanus ◽  
American Lobster
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