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Bibliography of the Maurice Lamontagne Institute

Jean LANDRY

SIMARD, Y., I. McQUINN, M. MONTMINY, C. LANG, C. STEVENS, F. GOULET, J.-P. LAPIERRE, J.-L. BEAULIEU, J. LANDRY, Y. SAMSON, M. GAGNÉ, 2000. CH2 : Canadian Hydroacoustic data analysis tool 2 user's manual (version 2.0). Can. Tech. Rep. Fish. Aquat. Sci., 2332, 123 p .

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CH2 is the acronym for Canadian Hydroacoustic data analysis tool 2. It is a Windows 95 Multiple Document Interface (MDI) C++ application, developed by the Department of Fisheries and Oceans within the framework of the Data Analysis Tools (DAT) project of its National Hydroacoustic Program (NHP). It is dedicated to the display and processing of the standard HAC (Simard et al. 1997) multi-channel (multiple frequencies or beams) multi-echosounder acoustic data produced by the CH1 acquisition and real-time monitoring module (Simard et al. 1998). Data can originate from various analog or digital echosounders (e.g. Biosonics 102 type, Simrad EK500, or EY500). CH2 version 2.0 includes several editing TOOLS, to edit, eliminate, ignore, threshold, filter, or correct the raw HAC data, without erasing any original information. It also incorporates multi-channel classification tools, to partition the acoustic data into echo categories according to user decisions, and multi-channel echointegration capabilities for each echo category. The user can always track the various processing steps that have been applied to the original raw data. CH2 holds full undo and redo facilities for the various operations applied to the raw data. Edited files can be saved under the standard HAC format and contain the raw data plus the parameters of the editing/classification operations. The echointegration data are exported in ASCII text files that are directly usable by common data analysis or visualisation packages such as worksheets, statistical packages, and 2-D and 3-D mapping packages.

GRÉGOIRE, F., R. MORNEAU, H. BOUCHARD, J. LANDRY, 1997. Analyse des captures de capelan (Mallotus villosus) associées aux programmes Pêcheur-Repères du capelan et de la crevette (Pandalus borealis). MPO, Secrétariat canadien pour l'évaluation des stocks, Document de recherche, 97/14, 30 p .

In 1996, 39 % to 63% of the catches made by the capelin fishermen from the Index-Fisherman program were not landed. The most important reasons cited for the discards were the small number of females in the catches and also their small size. The profile of the daily catches suggests a variable availability of the capelin to the fishery. The fishing season is short, just the time of the spawn because the market is directed to the ovigerous female. Fishermen from the shrimp Index program caught less capelin in 1996 than during the previous years. It has been suggested that the gradual movement of their fleet towards the south of the Gulf of St. Lawrence explains this reduction.

GRATTON, Y., B. PETTIGREW, B. PELCHAT, D. GILBERT, M. COUTURE, J. LANDRY, 1994. Overview of the environmental conditions in the Gulf of St. Lawrence in 1993. DFO, Atlantic Fisheries, Research Document, 94/55, 45 p .

D'AMOURS, D., J.G. LANDRY, T.C. LAMBERT, 1990. Growth of juvenile (O-group) Atlantic mackerel (Scomber scombrus) in the Gulf of St. Lawrence. Can. J. Fish. Aquat. Sci., 47: 2212-2218 .

D'AMOURS, D., J. LANDRY, 1989. Capture and husbandry of juvenile (0-year) Atlantic mackerel (Scomber scombrus). Can. Tech. Rep. Fish. Aquat. Sci., 1679, 11 p .

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Juvenile (0-year) Atlantic mackerel (Scomber scombrus) were captured in August 1988 in the Gulf of St. Lawrence. Early in the month, more fish were captured with a beach seine inside a semi-enclosed tidal pond then from a beach on the open ocean. Juvenile mackerel were also captured in open water with gill-nets later in the month. Some fish were kept alive in a holding tank for at least a month, and fed chopped fish at a rate of ca. 24 % wet body weight/day; the gross efficiency (mass gained/mass consumed) was 31.6 %. The captive fish grew from means of 95 mm and 8 g on August 14, to 144 mm and 29 g on September 4 (fork length and wet body weight, respectively). Quinaldine sulfate was an effective sedative at a concentration of 3 p.p.m. Fish preserved in anhydrous alcohol shrank by 3.9 % and lost 19 % of their wet weight. The condition factor was higher for the detained than for the wild fish, but lengths were similar at corresponding dates. A one-cycle Gompertz curve was fitted to the length data of the captive fish and the parameters were : Loo=186 mm, K=0.053, and to (julian day)=220 (August 7). From extrapolation on the growth curve of the captive fish, date at hatching length was July 11. Given the water temperature prevailing near this date, spawning had occurred 9 days earlier on July 2. Juvenile Atlantic mackerel grow rapidly, are easily caught with simple fishing gears, and support detention well at least up to a length of 145 mm : they are an ideal species for testing various growth related hypotheses.

LANDRY, J., I.H. McQUINN, 1988. Guide to microscopic and macroscopic identification of the sexual maturity stages of the Atlantic herring (Clupea harengus harengus L.). Can. Tech. Rep. Fish. Aquat. Sci., 1655, 71 p .

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Precise histological identification criteria associated with each of the eight macroscopic sexual maturity stages of Atlantic herring (Clupea harengus harengus) from the Canadian Atlantic Fisheries Scientific Advisory Committee (CAFSAC) classification key are described. The histological study also permitted a more detailed subdivision of the gonadal development cycle of herring (11 stages for males, 12 for females), and enabled the incorporation of several improvements to the macroscopic staging key. Notably, gonad corlour should only be used, even with fresh samples, to separate the beginning of stage VIII from stage II (the wine red tint being more pronounced in stage VIII). For females, the distinction between stages VIII and III must be made foremost from the visibility of the eggs with the naked eye in stage III. Gonad length relative to that of the coelomic cavity was added (or corrected in the case of stage IV) to the existing descritions. The priority accorded to each criteria was more clearly established, maturity stage identification most often resting principally on the relative width and length of the gonads. However, the establishment of criteria priorities does not generally diminish the imprecisions of the macroscopic key, but rather offers the possiblility of standardizing its utilization.

LANDRY, J., I.H. McQUINN, 1988. Guide d'identification microscopique et macroscopique des stades de maturité sexuelle du hareng de l'Atlantique (Clupea harengus harengus L.). Rapp. tech. can. sci. halieut. aquat., 1655, 71 p .

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Precise histological identification criteria associated with each of the eight macroscopic sexual maturity stages of Atlantic herring (Clupea harengus harengus) from the Canadian Atlantic Fisheries Scientific Advisory Committee (CAFSAC) classification key are described. The histological study also permitted a more detailed subdivision of the gonadal development cycle of herring (11 stages for males, 12 for females), and enabled the incorporation of several improvements to the macroscopic staging key. Notably, gonad corlour should only be used, even with fresh samples, to separate the beginning of stage VIII from stage II (the wine red tint being more pronounced in stage VIII). For females, the distinction between stages VIII and III must be made foremost from the visibility of the eggs with the naked eye in stage III. Gonad length relative to that of the coelomic cavity was added (or corrected in the case of stage IV) to the existing descritions. The priority accorded to each criteria was more clearly established, maturity stage identification most often resting principally on the relative width and length of the gonads. However, the establishment of criteria priorities does not generally diminish the imprecisions of the macroscopic key, but rather offers the possiblility of standardizing its utilization.

CASTONGUAY, M., J. LANDRY, 1987. Le maquereau bleu (Scomber scombrus Linné) du nord-ouest de l'Atlantique, sous-régions 2 à 6 de l'OPANO. CSCPCA doc. rech., 87/47, 34 p .