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Bibliography of the Maurice Lamontagne Institute

Jean LAMBERT

LAMBERT, J., 2011. Assessment of the Estuary and Northern Gulf of St. Lawrence (areas 13 to 17, 12A, 12B, 12C and 16A) Snow Crab stocks in 2010. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2011/038, 25 p .

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LAMBERT, J., 2011. Évaluation des stocks de crabe des neiges de l'estuaire et du nord du golfe du Saint-Laurent (zones 13 à 17, 12A, 12B, 12C et 16A) en 2010. MPO, Secrétariat canadien de consultation scientifique, Avis scientifique, 2011/038, 27 P .

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ARCHAMBAULT, D., H. BOURDAGES, B. BERNIER, A. FRÉCHET, J. GAUTHIER, F. GRÉGOIRE, J. LAMBERT, L. SAVARD, 2011. Résultats préliminaires du relevé multidisciplinaire de poissons de fond et de crevette d’août 2011 dans l’estuaire et le nord du golfe du Saint-Laurent ; Preliminary results from the groundfish and shrimp multidisciplinary survey in August 2011 in the Estuary and northern Gulf of St. Lawrence. MPO, Secrétariat canadien de consultation scientifique, Document de recherche ; DFO, Canadian Science Advisory Secretariat, Research Document, 2011/112, 108 p .

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In 2011, the annual summer survey for the assessment of abundance and distribution of groundfish and shrimp in the Estuary and the northern Gulf of St. Lawrence was conducted from August 1st to 29th onboard the CCGS Teleost. One of the primary objectives was to estimate abundance indices for the main groundfish species (cod, Greenland halibut, Atlantic halibut and redfishes – Sebastes fasciatus and S. mentella -), and for the Northern shrimp, and to identify the spatial distribution and biological characteristics of these species. The two other main objectives of the survey included monitoring the biodiversity of the Estuary and the northern Gulf, and describing oceanographic conditions observed in August for the sampling area. This report describes preliminary results on the catch rates and distribution of 25 taxa, as well as their size frequency distribution. These results were compared with results from the historical survey series that began in 1990, taking into account the equivalency factors used to convert data from the tandem CCGS Alfred Needler-URI to the tandem CCGS Teleost-Campelen. In 2011, the abundance and biomass indices of many species were stable or decreased compared to 2010. In fact, the two redfish species, cod, black dogfish and longfin hake showed index values below their respective means calculated for the comparative period of 1990-2010. Even if Atlantic halibut, witch, thorny skate, hagfish, northern shrimp and snow crab indices decreased from 2010 to 2011, they were comparable or higher than the mean estimated for the 1990-2010 period. Five species (Greenland halibut, white hake, American plaice, capelin and herring) showed an increase for their indices in 2011. Except for white hake, the indices for these species were similar or higher than the 1990-2010 period means. The geographic distributions of catches recorded for the different species in 2011 showed the same pattern as in previous years. Finally, the size distributions ranges determined for each species remains relatively stable for the entire time of the historical series. However, for some species (Greenland halibut, thorny skate, white hake, witch, American plaice, hagfish and northern shrimp), some size classes observed in 2011 were clearly dominant, and their abundance well above the calculated average for the comparative period.

LAMBERT, J., 2010. Assessment of the estuary and northern Gulf of St. Lawrence (areas 13 to 17, 12A, 12B, 12C and 16A) Snow Crab stocks in 2009. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2010/029, 28 p .

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BOURDAGES, H., D. ARCHAMBAULT, D. BERNIER, A. FRECHET, J. GAUTHIER, F. GREGOIRE, J. LAMBERT, L. SAVARD, 2010. Résultats préliminaires du relevé multidisciplinaire de poissons de fond et de crevette d'août 2009 dans le nord du golfe du Saint-Laurent ; Preliminary results from the groundfish and shrimp multidisciplinary survey in August 2009 in the northern Gulf of St. Lawrence. Rapp. stat. can. sci. halieut. aquat. ; Can. Data Rep. Fish. Aquat. Sci., 1226, 84 p. .

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In 2009, the annual summer survey for the assessment of abundance and distribution of groundfish and shrimp in the northern Gulf of St. Lawrence was conducted from July 31 to August 31 onboard the CCGS Teleost. One of the primary objectives was to estimate abundance indices for the mam groundfish species (particularly cod, Greenland halibut and redfish), and for the Northern shrimp, and to identify the spatial distribution and biological characteristics of these species. Other objectives included monitoring the biodiversity of the nOlthern Gulf and describing oceanographic conditions obser.ved in August. This report describes preliminary results on the catch rate and distribution of 15 taxa, as well as their size frequency distribution. These results were compared with results from the historical survey series that began in 1990, taking into account the equivalency factors used to convert the data from the tandem CCGS Alfred Needler-URI with the tandem CCGS Teleost-Campelen. In 2009, the abundance and biomass indices of many species have decreased compared to the previous years. In fact, the redfish, black dogfish and longfin hake indices are among the lowest values of the series. Greenland halibut, for which indices decreased by about 30 %, shows values similar to the early 2000's. However, the indices observed in 2009 for the other species (cod, Northern shrimp, Atlantic halibut, thorny skate, white hake, American plaice, witch flounder and snow crab) are comparable to the means of the last five years even though a decrease was observed compared to last year. The geographic distributions of catches recorded for the different species in 2009 show the same pattern as we have seen over the previous seven years

LAMBERT, J., 2010. Évaluation des stocks de crabe des neiges de l'estuaire et du nord du golfe du Saint-Laurent (zones 13 à 17, 12A, 12B, 12C et 16A) en 2009. MPO, Secrétariat canadien de consultation scientifique, Avis scientifique, 2010/029, 28 p .

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LAMBERT, J., 2009. Évaluation des stocks de crabe des neiges de l'estuaire et du nord du golfe du Saint-Laurent (zones 13 à 17, 12A, 12B, 12C et 16A) en 2008. MPO, Secrétariat canadien de consultation scientifique, Avis scientifique, 2009/027, 26 p .

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LAMBERT, J., S. DUBÉ, 2009. Évaluation des stocks de buccin des eaux côtiêres du Québec, 3 mars 2009, Institut Maurice-Lamontagne ; Stock assessments on whelk in the Quebec's inshore waters. MPO, Secrétariat canadien de consultation scientifique, Série des comptes rendus ; DFO, Canadian Science Advisory Secretariat, Proceedings Series, 2009/011, 20 p .

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This document contains the proceeding from the meeting held within the regional assessment process on whelk stocks in Quebec’s inshore waters following the 2006 to 2008 fishing season. This review process was held on March 3, 2009 at the Maurice Lamontagne Institute in Mont-Joli. This meeting gathered more than twenty participants from sciences to management to industry. During this meeting, the assembly reviewed the status of the whelk stocks 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

LAMBERT, J., 2008. Assessment of the Estuary and Northern Gulf of St. Lawrence (Areas 13 to 17 and 12A, 12B and 12C) Snow Crab Stocks in 2007. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2008/043, 22 p .

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BÉRUBÉ, I. (éd.), C. CYR (éd.), LAMBERT, J., 2008. Évaluations des stocks de mye des eaux côtières du Québec en 2007, 20 novembre 2007, Institut Maurice-Lamontagne ; Stock Assessments on Softshell clam in Quebec coastal waters in 2007, November 20, 2007, Maurice Lamontagne Institute. MPO, Secrétariat canadien de consultation scientifique, Série des comptes rendus ; DFO, Canadian Science Advisory Secretariat, Proceedings Series, 2008/001, 15 p .

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This document contains the proceedings from the meeting held within the regional assessment process on softshell clam in the Quebec coastal waters in Quebec region following the 2007 fishing season. This advisory process was held on November 20, 2007 at the Maurice-Lamontagne Institute in Mont-Joli. During this meeting, the assembly reviewed the stock status of the softshell clam in the Quebec coastal waters exploited by both commercial and recreational fishery as well as certain environmental parameters that prevailed during the last fishing seasons. Therefore, these proceedings contain the essential parts of the presentations and discussions held and relate the main recommendations and conclusions that were presented during the review.

BOURDAGES, H., D. ARCHAMBAULT, B. BERNIER, A. FRÉCHET, J. GAUTHIER, F. GRÉGOIRE, J. LAMBERT, L. SAVARD, 2008. Résultats préliminaires du relevé multidisciplinaire de poissons de fond et de crevette d'août 2008 dans le nord du golfe du Saint-Laurent ; Preliminary results from the groundfish and shrimp multidisciplinary survey from August 2007 in the northern Gulf of St. Lawrence. Rapp. stat. can. sci. halieut. aquat. ; Can. Data Rep. Fish. Aquat. Sci., 1210, 84 p. .

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In 2008, the annual summer survey for the assessment of abundance and distribution of groundfish and shrimp in the northern Gulf of St. Lawrence was conducted from July 24th to August 25th onboard the CCGS Teleost. One of the primary objectives was to estimate abundance indices for the principal groundfish species, including the three fish species targeted by the survey (cod, Greenland halibut and redfish), and for the Northern shrimp, identify for each of them their spatial distribution and biological characteristics. One of the other objectives, the survey aimed at providing a concurrent portrait of environmental conditions observed in August in the Gulf. This report describes for 14 species the preliminary results for their catch rate and distribution, as well as their size frequency distribution. These results were compared with results from the historical survey series that began in 1990, taking into account the equivalency factors used to convert the data from the tandem CCGS Alfred Needler-URI with the tandem CCGS Teleost-Campelen. While the biomass index in 2008 is still increasing for Atlantic halibut, the indices obtained for the other species are comparable to the means of the last three years. The geographic distributions of catches recorded for the different species in 2008 show the same pattern as for the five previous years.

BOURDAGES, H., D. ARCHAMBAULT, B. BERNIER, A. FRÉCHET, J. GAUTHIER, F. GRÉGOIRE, J. LAMBERT, L. SAVARD, 2008. Résultats préliminaires du relevé multidisciplinaire de poissons de fond et de crevette d’août 2007 dans le nord du golfe du Saint-Laurent ; Preliminary results from the groundfish and shrimp multidisciplinary survey from August 2007 in the northern Gulf of St. Lawrence. MPO, Secrétariat canadien de consultation scientifique, Document de recherche ; DFO, Canadian Science Advisory Secretariat, Research Document, 2008/046, 77 p .

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In 2007, the annual summer survey for the assessment of abundance and distribution of groundfish and shrimp in the Quebec region was conducted from August 3rd to September 1st in the estuary and northern Gulf of St. Lawrence on board the CCGS Teleost. One of its primary objectives was to estimate abundance indices for the main groundfish species, including the three species targeted by the survey (cod, Greenland halibut, redfish) and Northern shrimp (also targeted by the survey), identify spatial distribution and their biological characteristics. Among the other objectives, the survey aimed at providing a concurrent portrait of environmental conditions in the Gulf for 7 of the Gulf’s 8 geographic regions considered in the assessment of the Gulf’s physical conditions. This report describes for 14 species the preliminary results for catch rate and distribution, as well as their size frequency distribution. These results were compared with the results from the historical survey series introduced in 1990, taking into account the equivalency factors used to convert the data from the tandem CCGS Alfred Needler-URI with the tandem CCGS Teleost-Campelen. None of the species showed much variation compared with the two previous years, except for Atlantic halibut with a still increasing abundance index in 2007. The geographic distribution of catches recorded for the different species in 2007 can be compared to the five previous years. In 2007, the temperatures recorded for surface waters and for the cold intermediate layer (CIL) were generally colder for the entire covered area compared with the temperatures recorded in 2006. The layers <1°C and <0°C of the CIL were much thicker in 2007 than in 2006. However, the temperatures recorded for deep water (300+m) were similar during these two years. Concentrations of dissolved oxygen in the Estuary waters were still considered hypoxic in 2007.

LAMBERT, J., 2008. Évaluation des stocks de crabe des neiges de l'estuaire et du nord du golfe du Saint-Laurent (zones 13 à 17 et 12A, 12B et 12C) en 2007. MPO, Secrétariat canadien de consultation scientifique, Avis scientifique, 2008/043, 22 p .

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LAMBERT, J., 2007. Assessment of the estuary and northern Gulf of St. Lawrence (areas 13 to 17, 12A, 12B, 12C and 16A) snow crab stocks in 2008. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2009/027, 25 p .

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LAMBERT, J., 2007. Assessment of the Estuary and northern Gulf of St. Lawrence (areas 13 to 17 and 12A, 12B and 12C) snow crab stocks in 2006. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2007/017, 22 p .

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LAMBERT, J., 2007. Évaluation des stocks de crabe des neiges de l'estuaire et du nord du golfe du Saint-Laurent (zones 13 à 17 et 12A, 12B et 12C) en 2006. MPO, Secrétariat canadien de consultation scientifique, Avis scientifique, 2007/017, 22 p .

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LAMBERT, J., 2006. Assessment of the Estuary and Northern Gulf of St. Lawrence (areas 13 to 17 and 12A, 12B and 12C) snow crab stocks in 2005. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2006/019, 21 p .

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PAILLE, N., J. LAMBERT, N. SIMARD, S. PEREIRA, 2006. Le crabe vert (Carcinus maenas) : revue de littérature et situation aux Îles-de-la-Madeleine. Rapp. can. ind. sci. halieut. aquat., 276, 36 p .

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The green crab (Carcinus maenas) was identified in the Magdalen Islands for the first time in 2004. Seven crabs were observed by an eel fisherman near the Great Entry harbour, two of which were brought to the local Fisheries and Oceans Canada (DFO) office. Intensive sampling campaigns were undertaken in the summers of 2004 and 2005 to evaluate the regional status of this species. Two further crabs were caught by DFO during the 2004 campaign and none were captured in 2005. The geographic location and environmental conditions in the Magdalen Islands make the area at risk to invasion and monitoring should be continued. The potential ecological impacts of a C. maenas population becoming established in the Magdalen Islands are unknown. Monitoring of potential vectors of introduction, annual surveys, and the development of a rapid response plan are measures that must be put into place in order to limit the risks of introduction and subsequent impacts of a green crab invasion. The present document outlines the biology, ecology, and risks associated with the establishment of a green crab population. Specific recommendations with respect to control options for this species in the Magdalen Islands are also presented.

LAMBERT, J., 2006. Évaluation des stocks de crabe des neiges de l'estuaire et du nord du golfe du Saint-Laurent (zones 13 à 17 et 12A, 12B et 12C) en 2005. MPO, Secrétariat canadien de consultation scientifique, Avis scientifique, 2006/019, 21 p .

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CAMPAGNA, S., J. LAMBERT, P. ARCHAMBAULT, 2005. Abondance et distribution du concombre de mer (Cucumaria frondosa) et prises accidentelles obtenues par dragage entre Matane et Cap-Gaspé (Québec) en 2004. Rapp. tech. can. sci. halieut. aquat., 2620, 70 p .

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The results of an abundance survey aimed to determine the potential of a sea cucumber (Cucumaria frondosa) fishery on the north shore of the Gaspésie peninsula are presented. Abundance of C. frondosa was high between 10 and 40 m, with more than 50 % of the estimated biomass located at a 10 m depth. The drag used, LGS type (Light Green Sweep Urchin Drag), was not very selective and bycatch was abundant. Based only on abundance estimates, a commercial exploitation could be possible. Such a fishery would have to be developped cautiously

LAMBERT, J., 2005. Le crabe commun des eaux cotières du Québec. MPO, Secrétariat canadien de consultation scientifique, Avis scientifique, 2005/030, 12 p .

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LAMBERT, J., 2005. The Saguenay Fjord winter sport fishery in 2005. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2005/045, 11 p .

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LAMBERT, J., 2005. Rock crab of the costal [i.e.] coastal waters of Quebec. DFO, Canadian Science Advisory Secretariat, Science Advisory Report, 2005/030, 12 p .

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LAMBERT, J., 2004. Rock crab of the inshore waters of Quebec in 2003. Science, Stock Status Report, 2004/029, 9 p .

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LAMBERT, J., 2004. Le crabe commun des eaux côtières du Québec en 2003. Rapport sur l'état des stocks, 2004/029, 9 p .

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LAMBERT, J., 2003. Le crabe commun des eaux cotières du Québec en 2002. Rapport sur l'état des stocks, 2003/012, 11 p .

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LAMBERT, J., 2003. Rock crab of the inshore waters of Quebec in 2002. Science, Stock Status Report, 2003/012, 10 p .

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LAMBERT, J., 2002. Rock crab of the inshore waters of Quebec. Science, Stock Status Report, C4-02, 8 p .

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LAMBERT, J., 2002. Le crabe commun des eaux côtières du Québec. Rapport sur l'état des stocks, C4-02, 9 p .

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LAMBERT, J.-D., S. BÉRUBÉ, 2002. La pêche sportive hivernale dans le fjord du Saguenay. Rapp. tech. can. sci. halieut. aquat., 2445, 58 p .

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Ice fishing on the Saguenay Fjord attracts more than 50,000 fishermen-days annually, leading to different interventions to assure resource conservation as well as its sustainable development. A biological program was initiated in 1995 from a partnership between associations of local fishers, the Societe touristique du fjord, the Societe d'electrolyte et de chimie Alcan Ltee., the Societe de la faune et des parcs du Quebec, the Societe des etablissements de plein air du Quebec and the Department of Heritage Canada (Parks Canada) comanager of the Saguenay-St. Lawrence Marine Park, and the Dept. of Fisheries and Oceans, responsible for the scientific study. The biological program consisted of two working parties that required the participation of 32 volunteers from the local population. The first team consisted of eight samplers who collected catch and effort data on 20 occasions throughout the fishing season. The second team was composed of 24 fishermen who registered the length-weight, and condition of captured fish.

LAMBERT, J., 2001. Rock crab of the inshore waters of Quebec. Science, Stock Status Report, C4-02, 8 p .

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LAMBERT, J., 2001. Le crabe commun des eaux côtières du Québec. Rapport sur l'état des stocks, C4-02, 8 p .

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LAMBERT, J., 2000. Le Crabe commun des eaux côtières du Québec en 1999. Rapport sur l'état des stocks, C4-02, 9 p .

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LAMBERT, J., 2000. Rock Crab of the Inshore Waters of Quebec in 1999. Science, Stock Status Report, C4-02, 9 p .

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LAMBERT, J., P. GOUDREAU, 1999. Indices de croissance de la mactre de Stimpson (Mactromeris polynyma). Rapp. tech. can. sci. halieut. aquat., 2269, 39 p .

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Individual growth indices for Stimpson's surf clams (Mactromeris polynyma) on the middle north shore of the Gulf of St. Lawrence were obtained by three different methods : by examining growth rings on the shells or chondrophores, by following the growth of surf clams kept in tanks and by following the growth of clams in their natural habitat. Estimates of length at age, using growth ring age determinations, suggest that Stimpson's surf clams in the Moisie and Riviere-au-Tonnerre areas reach a length of 80 mm only after an average of 13 and 14 years, respectively. The average growth rate of clams from the same beds kept in tanks was higher than that observed for clams captured from the beds and aged by the number of growth rings. Growth rate of clams in tanks was strongly affected by density and biomass. In following clams in tanks, the formation of two growth rings in a single year was observed on several occasions, which would result in over-estimating their age by examining the number of rings. Differences were also observed for individuals between 70 and 90 mm in comparing the growth rates of clams in their natural habitat with the results of growth ring aging. Clams of this size from the natural habitat grew an average of 5 mm per year, while growth ring aging indicates a more pronounced slowing of growth rate at this size.

LAMBERT, J., 1999. Petite plongée dans le monde de la crevette nordique. Naturaliste can., 123(3): 66-68 .

LAMBERT, J., 1998. Shrimp of the estuary and the gulf of St. Lawrence. Science, Stock Status Report, C4-06, 12 p .

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LAMBERT, J., 1998. La crevette de l'estuaire et du golfe du Saint-Laurent. Rapport sur l'état des stocks, C4-06, 13 p .

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LAMBERT, J., H. BOUCHARD, L. SAVARD, 1998. État des populations de crevettes nordiques (Pandalus borealis) de l'estuaire et du golfe du Saint-Laurent (divisions 4RST de l'OPANO). MPO, Secrétariat canadien pour l'évaluation des stocks, Document de recherche, 98/102, 34 p .

Data from research surveys and commercial fishery for northern shrimp in the Gulf of St. Lawrence were analyzed and results are presented to show overall tendencies in the abundance of shrimp and the impact of harvest on the stocks. The abundance index for shrimp in the Gulf and Estuary has fluctuated since the 1980s. However, assessment results indicate that the populations were in good condition at the end of the 1997 fishing season. Fluctuations in abundance can be explained by the strength of the year-classes supporting the fishery. Thus, the high abundance indices of 1994, 1995, 1996 and 1997 are due to the contribution of the strong year-classes produced in the early 1990s. Shrimp in the size-class 19 to 21 mm that were hatched mainly in 1994, should reach sizes that are fully retained by trawls in 1998. This year-class, along with the strong 1993 year-class, should maintain catches at high levels in 1998.

LAMBERT, J., P. GOUDREAU, 1997. Biologie et exploitation de la mactre de Stimpson (Mactromeris polynyma) sur les côtes du Québec. MPO, Secrétariat canadien pour l'évaluation des stocks, Document de recherche, 97/101, 44 p .

Stimpson's surf clam (Mactromeris polynyma) has been exploited in Quebec since the beginning of the 1990s. Thirteen fishers has access to the resource in 1996 and the total allowable catch was set at 903 tons. Landings have fluctuated greatly and the highest catch was recorded in 1994 at 639 tons. Catch per unit effort (CPUE) has remained high since 1993 on the main exploited beds. Twelve surf clam beds are fished so far and their areas vary from 2.5 to more than 30 km2. The mean density of clams on these beds is generally between 2 and 4 clams/m2. The mean size of comercially caught clams has remained high since the beginning of the fishery and varies between the beds from 93 to 117 mm. During scientific sampling using a lined hydraulic dredge, 8 to 22 % of the clams caught were prerecruits smaller than 50 mm. On the North Shore of Quebec, growth to 80 mm takes from 11 to 14 years. Reproduction in clams occurs mainly at 62 mm or larger. The sex ratio of clams larger than 80 mm shows a clear predominance of females.

GRÉGOIRE, F., J. LAMBERT, C. LÉVESQUE, M.-F. BEAULIEU, 1997. Évaluation de la biomasse du maquereau bleu (Scomber scombrus L.) pour 1996 par la Méthode de la Production Totale d'oeufs ; Assessment of the Atlantic mackerel (Scomber scombrus L.) biomass for 1996 by the Total Eggs Production Method. MPO, Secrétariat canadien pour l'évaluation des stocks, Document de recherche ; DFO, Canadian Science Advisory Secretariat, Research Document, 97/71, 29 p .

The 1996 survey to assess the Atlantic mackerel biomass began three days later than planned, on June 18. On the first set, surface water temperatures were noted to be higher than during the initial sets of previous surveys. Furthermore, eggs at later development stages and mackerel larvae were more numerous. Daily egg production for the two sets was evaluated at 0.6604 x 1013 and 0.6129 x 1013 eggs, with corresponding spawning biomass values of 259,842 t and 241,318 t. The biomass values fell to 211,023 t and 206,566 t when the egg densities at each station were corrected for the oversampling that occurs at the end of tows. When these corrected densities were applied in the geostatistical approach, daily production values of 0.6068 x 1013 and 0.6366 x 1013 eggs were obtained for the sets, yielding biomass values of 238,897 t and 250,628 t. Using this approach, it was also determined that there is a close relationship between egg density and water temperature. This relationship can be used to improve abundance estimates in the future. Because the timing of the survey and spawning were not well synchronized and owing to the method used to derive the seasonal egg production curve, the abundance estimate for 1996 should be considered a minimal value.

LAMBERT, J., 1996. La mactre de Stimpson du Québec. MPO, Pêches de l'Atlantique, Rapport sur l'état des stocks, 96/7, 8 p .

LAMBERT, J., P. GOUDREAU, 1996. Performance of the New England hydraulic dredge for the harvest of Stimpson's surf clams (Mactromeris polynyma). Can. Ind. Rep. Fish. Aquat. Sci., 235, 28 p .

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The New England hydraulic dredge has been used recently in the commercial harvest of Stimpson's surf clams in the Gulf of St. Lawrence. We undertook a study to determine the harvesting efficiency of this fishing gear and its immediate impact on the mollusc populations.

LAMBERT, J., 1996. Québec Stimpson's surf clam. DFO, Atlantic Fisheries, Stock Status Report, 96/7, 8 p .

LAMBERT, J., P. GOUDREAU, 1995. Stimpson's surf clams and razor clams on the Québec coast. Pages 90-99 in L. Savard (ed.). Status report on invertebrates in 1994 : crustaceans and molluscs on the Québec coast, northern shrimp and zooplankton in the estuary and Gulf of St. Lawrence. DFO (Can. Manuscr. Rep. Fish. Aquat. Sci., 2323) .

LAMBERT, J., P. GOUDREAU, 1995. Performance de la drague hydraulique de type Nouvelle-Angleterre pour la récolte de la mactre de Stimpson (Mactromeris polynyma). Rapp. can. ind. sci. halieut. aquat., 235, 28 p .

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The New England hydraulic dredge has been used recently in the commercial harvest of Stimpson surf clam (Mactromeris polynyma) in the Gulf of St. Lawrence. A study was undertaken to determine the harvesting efficiency of this type of fishing gear and its immediate impact on the mollusc populations. The study was carried out in two parts; first, in 1993, the experiment took place abord a commercial clamming boat. The second, in 1994, was conducted abord a research vesse1 of the Department of Fisheries and Oceans. The sampling of each set has been done with an hydraulic dredge and with the assistance of a professional divers team. For both trips, Stimpson surf clams that were big enough to be retained in the hydraulic dredge bucket were harvested with an efficiency greater than 90 %. Of the clams that were left on the bottom, almost two-thirds were damaged by the dredge. A small percentage of other mollusc species that were not harvested were damaged. More than 20 % of the clams harvested by dredge showed signs of damage. Clams smaller than 66 mm were rare on the study site, thus it was not possible to assess gear selectivity or the effect of dredging on small individuals. However, by using a lining in the dredge, consisting of 19 mm mesh plastic vexatm netting, a better indication of the range of sizes of surf clams present in the area was obtained.

LAMBERT, J., G. PRÉFONTAINE, 1995. Le pétoncle d'Islande (Chlamys islandica) au Nunavik ; The Iceland scallop (Chlamys islandica) in Nunavik. Rapp. tech. can. sci. halieut. aquat. ; Can. Tech. Rep. Fish. Aquat. Sci., 2071, 40 p .

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Over the past few years the Inuit communities of Nunavik have shown an interest in harvesting non-traditional marine resources such as the Iceland scallop. In order to determine the distribution and abundance of Iceland scallops in this northern region, 2084 dredge tows were made between 1984 and 1992.

LAMBERT, J., P. GOUDREAU, 1995. Mactre de Stimpson et couteau des côtes du Québec. Pages 93-103 in L. Savard (éd.). Rapport sur l'état des invertébrés en 1994 : crustacés et mollusques des côtes du Québec, crevette nordique et zooplancton de l'estuaire et du golfe du Saint-Laurent. MPO (Rapp. manus. can. sci. halieut. aquat., 2323) .

LAMBERT, J., 1995. La mactre de Stimpson : vous connaissez?. Naturaliste can., 119(1) : 47-48 .

LAMBERT, J., 1994. Mollusques bivalves (mactre de Stimpson, mye commune, couteau) dont les pêcheries sont en développement sur les côtes du Québec. Pages 93-102 in L. Savard (éd.). Rapport sur l'état des invertébrés en 1993 : crustacés et mollusques des côtes du Québec et crevette nordique de l'estuaire et du golfe du Saint-Laurent. MPO (Rapp. manus. can. sci. halieut. aquat., 2257) .

LAMBERT, J., M. GIGUÈRE, 1994. Développement de la pêche à la mactre de Stimpson (Mactromeris polynyma) au Québec et efficacité de la drague hydraulique de type Nouvelle-Angleterre. Pages 73- 81 in L. Gendron & S. Robinson (ed.). The development of underutilized invertebrate fisheries in eastern Canada. Dept. of Fisheries and Oceans (Can. Manus. Rep. Fish. Aquat. Sci., 2247) .

LAMBERT, J., 1994. Bivalve molluscs (Stimpson's surf clam, softshell clam, razor clam) with developing fisheries on the Québec coast. Pages 82-90 in L. Savard (ed.). Status report in invertebrates 1993 : crustaceans and molluscs on the Québec coast and northern shrimp in the Estuary and Gulf of St. Lawrence. DFO (Can. Manuscr. Rep. Fish. Aquat. Sci., 2257) .

McQUINN, I.H., J. LAMBERT, 1991. A review of the west coast of Newfoundland (NAFO division 4R) herring fishery data up to 1990. CAFSAC Res. Doc., 91/65, 28 p .

Herring stocks are exploited in NAFO Division 4R from April to December, by both fixed and mobile gears. Landings reached only 17,000 t in 1990, despite a tAC of 35,000 t, mainly due to poor market and late-fall weather conditions. A limited market demand for gill netted herring has reduced the fixed gear landing to less than 20 % of the total since 1985. The traditional U.S. barrelled-product market has been slowly replaced by over-the-side sales to the Soviet Union, and frozen-round products for the Japanese. Spring spawners have been prevalent in the annual catch since 1973. Historically, this spawning group has been dominated by the 1968 and 1974 year-classes. Since 1985, the 1980 and 1982 year-classes have comprised greater than 68 % of the catch in numbers. The fall spawners had been dominated by the 11+ age group until 1983, when the 1979 year-class became the single most important cohort in the catch. The spring index-fishermen gillnet catch-rate series showed a significant increase from 1984 to 1986, and a subsequent decreasing trend to 1988 and stability to 1990. The fall-spawner series showed a major increase to 1986, and has followed a declining trend to 1990. Cohort analysis were not attempted as the population numbers were unconverged in last years assessment. However, the 1987 spring-spawner year-class, and 1986 fall-spawner cohort, have appeared in the fall purse seine catches in numbers not seen since the 1980 cohort recruited to the fishery. This is a promising sign for the continued good health of these stocks.

GAGNÉ, J.A., J. LAMBERT, F. MONGEAU, L. FORTIER, 1991. Population dynamics of herring in the St. Lawrence Estuary : a test of the Member/Vagrant hypothesis. Pages 103-106 in Proceedings of the International Herring Symposium, Anchorage, Alaska, USA, October 23-25, 1990. University of Alaska, Alaska Sea Grant College Program (Alaska Sea Grant report, 91-01) .

McQUINN, I.H., J. LAMBERT, 1990. A review of the west coast of Newfoundland (NAFO division 4R) herring fishery and biological trends in 1989. CAFSAC Res. Doc., 90/76, 20 p .

Concentrations of herring are exploited in NAFO Division 4R from April to December, by both fixed and mobile gears. Landings reached only 17,700 t in 1989, despite a TAC of 37,000 t, mainly due to poor market and weather conditions. A limited market demand for gillnetted herring has reduced the fixed gear landings to less than 20 % of the total since 1985. The traditional barrelled-product market has been slowly replaced by over-the-side sales to the Soviet Union, and frozen-round products for the Japanese. Spring spawners have dominated the annual catch since 1973. Historically, this spawning group has been dominated by the 1968 and 1974 year-classes. Since 1985, the 1980 and 1982 year-classes have comprised greater than 68 % of the catch in numbers. The fall spawners had been dominated by the 11+ age group until 1983, when the 1979 year-class became the single most important cohort in the catch. Abundance indices were estimated, for both spring and fall spawners, from commercial gillnet catch and effort data, and indexed gillnet fishermen logbooks. The spring catch-rate series showed a significant increase from 1981 to 1986-1987, and a subsequent decreasing trend to 1989. The fall-spawner series showed a major increase to 1986, followed by a decline to 1989. Population estimates from the cohort analysis were considered unreliable due to the unconverged population numbers and high values in the correlation matrices. However, it is notable that the mean age for these stocks is now 8 years old, suggesting that recent catch levels have not been detrimental to these populations. Also, it is implicit from the non-converged population estimates that fishing mortalities have been low in recent years.

SAVARD, L., Y. LAVERGNE, J. LAMBERT, 1988. Évaluation des stocks de crevette (Pandalus borealis) du golfe du Saint-Laurent. CSCPCA doc. rech., 88/60, 49 p .

Shrimpo (Pandalus borealis) landings in the Gulf of St. Lawrence almost reached 12 000 tons in 1987 which is an increase of 25 % relative to 1986. All area catches increased in variable proportions and quotas were caught in the North-Anticosti and Estuary areas. The status of the northern Gulf of St. Lawrence shrimp populations seems to be good. Commercial fleet catch rates have been stable whithin years. Spring biomass estimates obtained from an experimental survey done in 1987 have not shown a decrease in the abundance of populations. Demographic structures obtained in the abundance of populations. Demographic structures obtained from commercial sampling have not shown strong changes in these population dynamics. However, in Sept-Iles, sex inversion happened at a smaller size in 1987 than in 1982. Given that catches have continued to increase for all areas, that catch rates have been stable and, that spring biomass has been relatively high, recommanded TAC's in 1987 should still be appropriate for the 1988 fishing season.