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Bibliography of the Maurice Lamontagne Institute

Jean-Jacques MAGUIRE

MAGUIRE, J.-J., S. DUBE, 2009. Évaluation des stocks de crabe des neiges de l'estuaire et du nord du golfe du Saint-Laurent, 2 au 4 février 2009, Institut Maurice-Lamontagne ; Stock assessments on snow crab in the Estuary and Northern Gulf of St. Lawrence, February 2 to 4, 2009, Maurice Lamontagne Institute. MPO, Secrétariat canadien de consultation scientifique, Série des comptes rendus ; DFO, Canadian Science Advisory Secretariat, Proceedings Series, 2009/016, 29 p .

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This document contains the proceeding from the meeting held within the regional assessment process on Snow Crab in the Estuary and Northern Gulf of St. Lawrence following the 2008 fishing season. This review process was held on February 2 to 4, 2009 at the Maurice Lamontagne Institute in Mont-Joli. This meeting gathered about sixty participants from sciences to management to industry. During this meeting, the assembly reviewed the status of the Snow Crab commercially exploited in the Quebec Region. Therefore, this proceeding contains the essential parts of the presentations and discussions held and relates the main recommendations and conclusions that were presented during the review

GRÉGOIRE, F., J.-J. MAGUIRE, 1995. Description de la pêche au maquereau bleu (Scomber scombrus L.) en 1994 et essai d'application de ICA ; Description of the 1994 Atlantic mackerel (Scomber scombrus L.) fishery and trial application of ICA. MPO, Pêches de l'Atlantique, Document de recherche ; DFO, Atlantic Fisheries, Research Document, 95/111, 115 p .

In 1994, commercial landings of mackerel for the entire northwest Atlantic were roughly 25,000 t. According to the quota report, Canadian landings amounted to 19,000 t, which compares with 12,474 t based on the preliminary catch file established from logbook and purchase slip data. U.S. commercial and recreational landings stood at 5,000 t and 500 t, respectively. On the Scotian Shelf, a total of 44 t of mackerel was caught by Canadian and foreign vessels, with most of this quantity taken by a single Cuban boat. Among Canadian catches, the dominant year-classes were those of 1988, 1990, 1987 and 1991, in that order. The mean age and weight of these fish were 5.7 years and 533 g. A new technique was tested as a means of adjusting virtual population analysis (VPA) using abundance indices. This method, called Integrated Catch Analysis (ICA), was used with the egg index and a U.S. abundance index derived from a spring bottom trawl survey. With ICA, the spawning biomass and the total biomass of the northern population, which spawns mainly in the Gulf of St. Lawrence, and the southern population, which spawns chiefly along the U.S. coast, were estimated at 2 and 3 million tonnes, respectively. These estimates are similar to the figures obtained by some U.S. colleagues, who used a different method of calculation.

MORIN, B., B. BERNIER, D. CHABOT, J.J. MAGUIRE, 1995. Évaluation et biologie du flétan du Groenland (Reinhardtius hippoglossoides) du golfe du Saint-Laurent (4RST) en 1994. MPO, Pêches de l'Atlantique, Document de recherche, 95/59, 47 p .

Since 1992, Greenland halibut of Divisions 4RST is managed as a distinct population on the basis of yield per recruit. The main concentrations of Greenland halibut in the Gulf of St. Lawrence during the summer are found on the west side of Anticosti Island and to a lesser extent north of this Island and in the Esquiman Channel near the west coast of Newfoundland. Preliminary results on sexual maturity of Greenland halibut in the estuary of the St. Lawrence River had showed that the length where 50 % of the male and the female were mature were 39 and 56 cm respectively in 1993-94. Landings of 4RST Greenland halibut have increased from 2,800 t to 3,600 t between 1993 and 1994. Gillnet is the main fishing gear used in this fishery since the middle of the 1970's. The size of fish caught by gillnet in 1994 was mainly between 41-45 cm and 70 % of these fishes were female. Thus, the majority of the catch were immature fish. Abundance indices showed that the biomass of Greenland halibut is low but relatively stable since 1990. Exploitation rate is probably high and the low number of large fish results in the concentration of this exploitation on the annual recruitment. Thus, it is important to protect juveniles in order to allow the spawning biomass to increase.

GRÉGOIRE, F., J.-J. MAGUIRE, C. LÉVESQUE, 1994. Mackerel (Scomber scombrus L.) fishery situation in NAFO subareas 2-6 in 1993 ; Situation de la pêche au maquereau (Scomber scombrus L.) dans les sous-régions 2-6 de l'OPANO en 1993. DFO, Atlantic Fisheries, Research Document ; MPO, Pêches de l'Atlantique, Document de recherche, 94/62, 82 p .

MAGUIRE, J.-J., Y.C. CHAGNON, M. CASTONGUAY, B. MERCILLE, 1987. A review of mackerel management areas in the Northwest Atlantic. CAFSAC Res. Doc., 87/71, 31 p .

The history of the stock unit presently used for management of Northwest Atlantic mackerel is reviewed. Although two spawning populations were known to exist, the management area was defined on the basis of mixing of the two populations on overwintering grounds where most of the fishery was then occurring. The biological basis for the definition of the management unit is reviewed and shows that tagging data were the main factor in defining the management area. Recent genetic analyses do not suggest modifying the currently used management area.