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Bibliography of the Maurice Lamontagne Institute

Denis BERNIER

KENCHINGTON, E., C. LIRETTE, A. COGSWELL, D. ARCHAMBAULT, P. ARCHAMBAULT, H. BENOIT, D. BERNIER, B. BRODIE, S. FULLER, K. GILKINSON, M. LÉVESQUE, D. POWER, T. SIFERD, M. TREBLE, V. WAREHAM, 2010. Delineating coral and sponge concentrations in the biogeographic regions of the East Coast of Canada using spatial analyses ; Délimitation des concentrations de corail et d'éponge dans les régions biogéographiques de la côte est du Canada au moyen de l'analyse spatiale. DFO, Canadian Science Advisory Secretariat, Research Document ; MPO, Secrétariat canadien de consultation scientifique, Document de recherche, 2010/041, 208 p .

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Concentrations of sea pens, small and large gorgonian corals and sponges on the east coast of Canada have been identified through spatial analysis of research vessel survey by-catch data following an approach used by the Northwest Atlantic Fisheries Organization (NAFO) in the Regulatory Area (NRA) on Flemish Cap and southeast Grand Banks. Kernel density analysis was used to identify high concentrations. These analyses were performed for each of the five biogeographic zones of eastern Canada. The largest sea pen fields were found in the Laurentian Channel as it cuts through the Gulf of St. Lawrence, while large gorgonian coral forests were found in the Eastern Arctic and on the northern Labrador continental slope. Large ball-shaped Geodia spp. sponges were located along the continental slopes north of the Grand Banks, while on the Scotian Shelf a unique population of the large barrel-shaped sponge Vazella pourtalesi was identified. The latitude and longitude marking the positions of all tows which form these and other dense aggregations are provided along with the positions of all tows which captured black coral, a non-aggregating taxon which is long-lived and vulnerable to fishing pressures.

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

DUTIL, J.-D., C. NOZÈRES, P.-M. SCALLON-CHOUINARD, L. VAN GUELPEN, D. BERNIER, S. PROULX, R. MILLER, C. SAVENKOFF, 2009. Poissons connus et méconnus des fonds marins du Saint-Laurent. Naturaliste can., 133(2): 70-82 .

[Abstract only available in French]
Des relevés effectués au moyen de chaluts benthiques entre 2004 et 2008 dans le bas Saguenay, l'estuaire maritime et le nord du golfe du Saint-Laurent ont permis d'identifier à l'espèce plus d'un million de poissons. Les captures ont été largement dominées par quatre espèces de prédateurs d'intérêt commercial: le flétan du Groenland, deux espèces de sébaste et la morue franche, mais on a dénombré plus d'une centaine d'espèces dont la moitié peuvent être considérées rares sur les fonds chalutés. Les espèces les plus abondantes dans les captures étaient également celles qui furent répertoriées dans une plus forte proportion des stations échantillonnées. Les espèces inusitées possèdent une distribution soit boréale, soit méridionale, et fréquentent généralement le plateau continental ou même le talus continental au-dessus de la plaine abyssale dans l'Atlantique. Les données issues de ces relevés ne fournissent qu'une vision partielle des communautés de poissons dans le Saint-Laurent: les poissons pélagiques et estuariens étaient mal représentés dans nos échantillons, les fonds rocheux ou escarpés n'étant généralement pas chalutables. Ce vaste territoire d'environ I5O 000 km2 est peuplé d'une faune variée.©2009 La Société Provancher d'histoire naturelle du Canada Certains poissons sont communs, d'autres représentent des visiteurs occasionnels en provenance des profondeurs de l'Atlantique, mais tous sont fascinants. Encore aujourd'hui, l'écologie d'un grand nombre de ces espèces reste mal connue.

DUBÉ, S., D. BERNIER, C. CYR, 2007. Compte rendu de l'atelier zonal : examen de l'information dont dispose le secteur des Sciences du MPO sur le sébaste (Sebastes sp.) pour l'évaluation du COSEPAC : discrimination des stocks de sébaste des unités 1 et 2 : examen de la pêche indicatrice, 19 et 20 septembre 2007, Institut Maurice-Lamontagne, Mont-Joli, QC ; Proceedings of the zonal workshop : review of the information on redfish (Sebastes sp.) available from DFO Science sector for the COSEWIC assessment : discrimination of redfish stocks of units 1 and 2 : index fishery review, September 19th and 20th, 2007, Maurice Lamontagne Institute, Mont-Joli, QC. MPO, Secrétariat canadien de consultation scientifique, Série des comptes rendus ; DFO, Canadian Science Advisory Secretariat, Proceedings Series, 2007/040, 26 p .

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A two-day workshop on redfish was held at the Maurice Lamontagne Institute on September 19th and 20th, 2007. This meeting gathered nearly 40 participants from research to management to industry. There were three objectives on the agenda. First, review the information on redfish (Sebastes sp.) available from the Department of Fisheries and Oceans (DFO) Science sector for the assessment by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC). In fact, in its call for bids of the fall of 2006, COSEWIC was requesting that a report be produced on the status of redfish (Sebastes fasciatus and S. mentella), which triggered the assessment process for these species. The second objective was to present the recent data on the stock structure of redfish in the Northwest Atlantic in order to determine the biological relevance of management units 1 and 2. This objective followed a zonal workshop (DFO 2006) where the discussions did not lead to any consensus. The last objective of the workshop was to re-examine the relevance of maintaining the redfish index fishery in Unit 1, which has been under moratorium since 1995. Examining the information on redfish led to the discovery of complex structure patterns, but also to some reflection on the value of the data obtained and the methods used. The second objective led to a series of recommendations, including consolidating Units 1 and 2 into one unit for each of the two species: S. mentella and S. fasciatus. It was also recommended to consider the complexity of the structure patterns in the assessment process and in developing management and conservation measures. Finally, the meeting did not lead to any conclusion in terms of the relevance of maintaining the index fishery in Unit 1. It was suggested to conduct a redfish stock assessment by considering the overall data, including the index fishery data, prior to agreeing on this issue.

CYR, C., D. BERNIER, M. CASTONGUAY, 2006. Compte rendu de l'atelier zonal sur les nouveaux éléments probants concernant la question de la distinction des stocks de sébaste des Unités 1 et 2 dans le contexte du mode de gestion actuelle, 9 février 2006, Institut Maurice-Lamontagne, Mont-Joli, Qc ; Proceedings of the Zonal Workshop on new evidence regarding the issue of redfish stock discrimination between Units 1 and 2 in the context of the current management practice, 9 February 2006, Maurice Lamontagne Institute, Mont-Joli, Qc. MPO, Secrétariat canadien de consultation scientifique, Série des comptes rendus ; DFO, Canadian Science Advisory Secretariat, Proceedings Series, 2006/019, 13 p .

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A zonal workshop of one-day was held in order to examine new elements concerning the distinction of redfish stocks in Units 1 and 2 within the context of the current management approach. During the meeting held on February 9th, 2006, participants studied the most recent data concerning population structure of Northwest Atlantic redfish stocks. Specifically, genetic and geometric morphometric data as well as data on the elemental composition of otoliths were examined. The discussions that were held during the workshop were not entirely conclusive as to the biological relevance of the management units currently used for redfish. Nevertheless, it was agreed to that this point be added to the agenda of a future workshop, which should be held within a few months.

DUTIL, J.-D., R. MILLER, C. NOZÈRES, B. BERNIER, D. BERNIER, D. GASCON, 2006. Révision des identifications de poissons faites lors des relevés scientifiques annuels de l'abondance des poissons de fond et de la crevette nordique dans l'estuaire et le nord du golfe du Saint-Laurent. Rapp. manus. can. sci. halieut. aquat., 2760, 87 p .

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Long time series of data are a source of invaluable information to put a current situation in a historical perspective. The data obtained from the scientific research surveys for the assessment of demersal fish and northern shrimp abundance conducted annually in the estuary and northern Gulf of St. Lawrence are regularly used for this purpose. The validity of these data is not questioned with regard to the identification of commercial species managed by our region, but this overall statement may not apply as well to the identification of non commercial fish species. Following a workshop held at IML in 2005, a working group has determined whether the data on the identification of non commercial species and commercial species not being managed by our region and collected between 1978 and 2003 are valid. For these species, the sampling protocol varied markedly over time. Not all fish were identified to the species level and in many instances very broad taxonomic levels were used. The identification of some species was inadequate, particularly in the Cottidae, Liparidae and Zoarcidae families. Overall, this data set must be used with caution if one is interested in the rare species, in measuring biodiversity, or in studying the temporal trends in the case of the species which are not managed by our region. In this report, we identify the weaknesses and suggest solutions to improve quality in the historical data as well as in the process of acquisition of new data.

MORIN, B., B. BERNIER, H. BOURDAGES, D. BERNIER, R. CAMIRAND, 2001. L'état du stock de sébaste de l'unité 1 (golfe du Saint-Laurent) en 2000 ; The status of the redfish stock in unit 1 (Gulf of St. Lawrence) in 2000. MPO, Secrétariat canadien de consultation scientifique, Document de recherche ; DFO, Canadian Science Advisory Secretariat, Research Document, 2001/001, 73 p .

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The fishery in management unit 1 [divisions 4RST +  3Pn and 4Vn (Jan.-May)] has been closed since 1995. Before the fishery was closed, the catch was dominated by fish born in the early 1970s and around 1980. Both groups consisted of the species Sebastes mentella. The abundance of the 1988 year-class, composed mainly of S. fasciatus, has decreased rapidly since 1991. The reasons for the small size of the current stock are heavy past exploitation and lack of recruitment. Following the 1995 closure of the fishery, the stock’s abundance seems to have stabilized; the abundance index derived from DFO’s research surveys has been stable, if low. Two cohorts of juveniles were observed in DFO’s 2000 research survey: the 1996 and 1998 year-classes. Most of these redfish are S. fasciatus, and both of these yearclasses seem relatively weak compared with that of 1988. The catch rate index obtained from the Groundfish Enterprise Allocation Council (GEAC) grid surveys trended downward from 1998 to 2000. The catch per unit effort (CPUE) figures from the index fishery were similar in 1999 and 2000, but lower than those obtained before the fishery was closed in 1995. The indices from the sentinel fishery surveys have also been stable for the period 1995-1999, but the value from the summer 2000 survey amounts to only about half of the 1999 estimate. Overall, the outlook for this stock remains poor for the foreseeable future.

BERNIER, D., ALDOUS, D., F. GRÉGOIRE, 2000. Conditions printanières de température et de salinité en relation avec la migration du maquereau bleu (Scomber scombrus L.) ; Spring temperature and salinity conditions in relation to the migration of Atlantic mackerel (Scomber scombrus L.). Rapp. can. ind. sci. halieut. aquat. ; Can. Ind. Rep. Fish. Aquat. Sci., 253, 44 p .

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[Abstract only available in French]
Un relevé effectué conjointement avec le CRP, le Ministère des Pêches et de l'Aquaculture de la Nouvelle-Écosse et le Ministère des Pêches et des Océans du Canada (MPO) a été réalisé sur le banc de Georges au cours de la période du 5 au 7 mai 1998 inclusivement. L'objectif principal était de décrire certaines conditions environnementales présentes à cet endroit à un moment de l'année qui coïncide avec le retour du maquereau en eaux canadiennes. Des profils de température et de salinité ont été réalisés à 66 stations distribuées dans la région du banc de Georges. L'analyse de ces profils a démontré la présence dans la colonne d'eau de conditions thermiques différentes selon la zone échantillonnée. Les stations localisées sur le banc de Georges possédaient des conditions thermiques favorables à la présence du maquereau contrairement aux stations localisées sur sa périphérie. Lors de la migration printanière, le maquereau pourrait alors emprunter un ou des corridors de migration le détournant de cette région. Les prises accessoires de maquereau réalisées par des chalutiers, à l'extérieur du banc de Georges, à la même période que le relevé, semblent appuyer cette hypothèse.