scholarly journals Growth of juvenile lobster Homarus americanus off the Magdalen Islands (Quebec, Canada) and projection of instar and age at commercial size

2006 ◽  
Vol 326 ◽  
pp. 221-233 ◽  
Author(s):  
K Gendron ◽  
B Sainte-Marie
Keyword(s):  
Homarus Americanus ◽  
Commercial Size ◽  
Magdalen Islands

L'incidence d'Aerococcus viridans var. homari dans le stock naturel de homards (Homarus americanus) des îles de la Madeleine (Québec), suite à une épidémie de gaffkémie dans un élevage in situ

1987 ◽  
Vol 44 (2) ◽  
pp. 368-372 ◽  
Author(s):  
Jacques Ménard ◽  
Bruno Myrand
Keyword(s):  
Homarus Americanus ◽  
Private Facility ◽  
La Madeleine ◽  
Magdalen Islands

In 1982, gaffkemia appeared in a private lobster (Homarus americanus) culture facility located in House Harbour lagoon in Magdalen Islands (Quebec, Canada). It caused the death of about 40 000 lobsters. The outbreak did not expand to the natural stock despite the fact that conditions seemed favourable for the spread of gaffkemia. In June 1983, only 2% of the lobsters sampled around the islands (6/300) were contaminated. By June 1984, no infected individuals were found either in the natural stock or from the private facility. Lobster fishing data from 1979 to 1985 confirm that gaffkemia did not affect natural stock.

Modified Lobster Traps for Catching Crabs and Keeping Lobsters Out

1975 ◽  
Vol 32 (12) ◽  
pp. 2515-2520 ◽  
Author(s):  
Aivars B. Stasko
Keyword(s):  
Laboratory Tests ◽  
Homarus Americanus ◽  
Cancer Irroratus ◽  
Pass Through ◽  
Commercial Size ◽  
Trap Entrance

Before redesigning lobster traps for capturing crabs and excluding lobsters, laboratory tests were done to determine the ability of both crabs Cancer irroratus and lobsters Homarus americanus to pass through simulated trap entrances and escape holes of various sizes and shapes. A long rectangular opening 44.5 mm (1.75 inches) wide allowed most crabs to enter, yet prevented passage of most legal-size lobsters. For use as escape holes in traps, round openings were found to be more effective than square ones to allow escape of lobsters while retaining commercial-size crabs.Lobster traps were then modified by closing the fishing heads and providing a long rectangular entrance at the top of the trap. Trap entrance widths of 44.5 and 51 mm (1.75 and 2.0 inches) fished crabs equally well; traps with a 38-mm (1.5-inch) entrance, and unmodified lobster traps caught fewer crabs. No lobsters were caught in the modified traps with entrance at the top.

A Shell Disease in Lobsters (Homarus americanus) Caused by Chitinovorous Bacteria

1937 ◽  
Vol 3 (4) ◽  
pp. 358-362 ◽  
Author(s):  
Ernest Hess
Keyword(s):  
Prince Edward Island ◽  
Homarus Americanus ◽  
Cape Breton ◽  
Shell Disease ◽  
Characteristic Manner ◽  
Saline Medium ◽  
Magdalen Islands

Chitinovorous bacteria have been isolated from lobsters (Homarus americanus) showing a peculiar shell disease. Cases are reported (1936) from ten widely separated localities in Cape Breton, Prince Edward Island and Magdalen islands. A regular epidemic occurred in a lobster pound at Yarmouth, N.S. All isolated strains attack strips of purified chitin in Benecke's saline medium in a characteristic manner.

Correlations between Seasonal River Discharge and Local Landings of American Lobster (Homarus americanus) and Atlantic Halibut (Hippoglossus hippoglossus) in the Gulf of St. Lawrence

1973 ◽  
Vol 30 (6) ◽  
pp. 856-859 ◽  
Author(s):  
W. H. Sutcliffe Jr.
Keyword(s):  
River Discharge ◽  
Homarus Americanus ◽  
American Lobster ◽  
Atlantic Halibut ◽  
Age At Maturity ◽  
Hippoglossus Hippoglossus ◽  
Monthly Discharge ◽  
Positive Correlations ◽  
Commercial Size ◽  
St Lawrence River

Positive correlations are found between monthly discharge of the St. Lawrence River and annual regional catch of American lobster (Homarus americanus) and Atlantic halibut (Hippoglossus hippoglossus). Lag periods to account for age at maturity or commercial size permit some predictive possibilities.

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.

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