scholarly journals Egg Development Trajectories of Early and Late-Spawner Lobsters (Homarus Americanus) in the Magdalen Islands, Québec

2009 ◽  
Vol 29 (3) ◽  
pp. 356-363 ◽  
Author(s):  
Louise Gendron ◽  
Patrick Ouellet
Keyword(s):  
Homarus Americanus ◽  
Egg Development ◽  
Development Trajectories ◽  
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.

Migratory Movements of Ovigerous Lobsters, Homarus americanus, Tagged off Grand Manan, Eastern Canada

1986 ◽  
Vol 43 (11) ◽  
pp. 2197-2205 ◽  
Author(s):  
Alan Campbell
Keyword(s):  
Homarus Americanus ◽  
Shallow Waters ◽  
Bay Of Fundy ◽  
Degree Days ◽  
Eastern Canada ◽  
Egg Development ◽  
Sufficient Degree ◽  
Positive Correlations ◽  
Hatching Eggs ◽  
Migratory Movements

A total of 2139 ovigerous lobsters, Homarus americanus, were tagged and egg development recorded off Grand Manan, eastern Canada, during 1982–83. Recaptures during August 1982 to January 1984 totaled 1877, representing 1046 individuals including 457 that were captured 2–10 times. The single recapture data indicate that the majority (75%) of the lobsters moved < 15 km. Use of distance moved information from single recaptures of lobsters at liberty for long periods can be misleading, since exact distance moved between tag release–recapture points usually is unknown. Multiple recapture and depth at recapture data gave more information on the movements of the lobsters. Many lobsters showed seasonal shallow-deep migrations of > 20 km with recaptures in shallow (< 20 m) water during summer–fall and in deep (> 200 m) water during winter–spring. Many ovigerous females returned to the Grand Manan area the following summer. A few (7%) moved north > 30 km into the Bay of Fundy and south as much as 322 km along the coastline of Maine. Examination of the multiple recapture data between months indicated positive correlations between change in depth, distance moved, and water temperature. The seasonal depth migrations of ovigerous lobsters appear to be associated with maximizing temperatures which provide sufficient degree-days for completion of egg development. Also, hatching eggs in relatively warm shallow waters may confer a survival advantage for pelagic lobster larvae by decreasing development time to the benthic stage.

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.

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
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