Canadian Stock Assessment SecretariatOverview
Publication Timeline
Most widely held works by
Canadian Stock Assessment Secretariat
An assessment of the status of harbour seals (Phoca vitulina) in British Columbia
by Peter F Olesiuk
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Book
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3 editions published in 1999 in English and held by 5 libraries worldwide
The status of redfish in Unit 2
by D Power
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Book
)
5 editions published between 1999 and 2000 in English and held by 4 libraries worldwide This paper presents information relevant to the assessment of redfish stock status to November 2000 and the provision of redfish management advice for the 2001-02 fishing year in the Laurentian Channel area (Unit 2). It first describes management regulations (including quotas & seasonal closures) and the fishery, then presents & discusses data from the commercial fishery & research surveys including catch at length, geographic distribution, size composition, and abundance. Finally, sources of data uncertainty are discussed and a prognosis for the fishery is provided.
Follow-up assessments of Atlantic salmon in the Saint John River drainage, N.B., 1998
by T.L Marshall
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Book
)
3 editions published in 1999 in English and held by 4 libraries worldwide This document presents data background to earlier assessments, a stock outlook, & management considerations for Atlantic salmon stocks originating at & above Mactaquac on the St John River, New Brunswick, in 1999. It first reviews salmon returns destined for Mactaquac, estimated removals, conservation requirements, escapement, juvenile densities, & forecasts of returns. It then assesses adult returns to the Hammond River in 1998 and spring smolt migration from the Nashwaak River in 1998.
Preliminary estimates of harp seal by-catch in the Newfoundland lumpfish fishery
by D Walsh
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide The incidental by-catch of marine mammal species in fishing gear is a world-wide phenomenon of major conservation concern. Although the waters of Newfoundland have been intensively fished and the by-catch of marine mammals may be substantial, little effort has gone into quantifying the magnitude of the take. This research document presents preliminary estimates of the number of harp seals taken as by-catch in the Newfoundland lumpfish gill net fishery from 1970-1998. Estimates of fishing effort and the number of seals taken annually were obtained from a By-Catch Logbook Program conducted by fishermen from 1989-1998. Prior to 1989, annual seal by-catches were estimated using historic roe landings and average by-catch levels based on the Logbook Program.
Cod catch results from fall 1999 survey in NAFO division 3Ps
by John McClintock
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide This report presents the results of the 3rd Groundfish Enterprise Allocation Council survey in Division 3Ps directed at cod. It includes catch statistics, length and age distribution, and stratified analysis estimates of cod abundance and biomass, including age distribution estimates, and interpretation of results.
Rock crab off eastern Nova Scotia stock status and evaluation of exploratory fishery
by M. John Tremblay
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Book
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3 editions published in 2000 in English and held by 4 libraries worldwide This report reviews fisheries for rock crab (Cancer irroratus) off eastern Cape Breton and the eastern shore of Nova Scotia. It examines trends in landings, effort and catch rate (in kg per trap haul) to assess the potential effect of the fishery on the rock crab stocks. It also evaluates the current regulations that are in place, and assesses whether more effort is advisable.
Distribution and abundance of Atlantic cod from an acoustic survey of Bonavista Bay-Trinity Bay, Newfoundland during the fall of 1999
by John P Wheeler
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide An acoustic survey was conducted during the fall of 1999 in the coastal waters of Bonavista Bay-Trinity Bay, Newfoundland. The survey area included water depths from the coastline to the 120 metre contour. Echo integration along a series of parallel transects within the survey area provided distributional information, densities, and a biomass estimate of Atlantic cod. This paper presents & discusses those results, and makes comparisons with a similar survey conducted in the fall of 1996.
Exploratory fisheries for rock crab, Cancer irroratus, and Jonah crab, Cancer borealis, in Canadian lobster fishing areas 34, 35, 36 & 38
by David A Robichaud
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide This document describes the evolution of inshore exploratory rock crab & Jonah crab fisheries in four lobster fishing areas in the Gulf of Maine since 1995. Trends in landings, fishing effort, and catch rates (kilograms per trap haul) are analyzed to assess the potential impact that the fishery has had on the rock crab & Jonah crab resources in each fishing area. By-catch of these species in the lobster fishery is also briefly discussed.
Metapopulation theory and northern cod population structure interdependency of subpopulations in recovery of a groundfish population
by R. Kent Smedbol
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide This paper applies metapopulation theory to the Atlantic cod (Gadus morhua) population inhabiting the coastal & offshore regions of eastern Newfoundland & Labrador. Evidence for subpopulation structure is drawn from studies of spawning time & locations, morphometrics, and genetic differentiation. Putative subpopulations are identified which are associated with spawning areas near offshore banks & in coastal bays. The historical northern cod population is first represented as an unfinished metapopulation in a model which is then modified to include the influence of fishing harvest on subpopulation extinction. Validation of the metapopulation theory, which predicts that fewer spawning areas are occupied as the population declines, is illustrated for Saglek, Nain, Makkovik, and Harrison banks. The model has implications for the effects of a continued fishery moratorium on the promotion of recolonization and acceleration of the recovery of the overall metapopulation.
Status of monkfish in 4VWX5Zc
by Diane Beanlands
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide This report represents the first assessment of the status of monkfish (Lophius americanus) on the Scotian Shelf & Georges Bank since the completion of a five-year exploratory fishery. It first reviews the fishery since 1964, then discusses the status of the monkfish resource as investigated from research vessel surveys, the length frequency distribution of monkfish as determined from surveys, results from a joint industry/government survey on monkfish distribution & abundance, estimated catch rates & other data from the commercial fishery, and results of other surveys & biological studies. The final section uses the traffic light approach to summarize indicators of stock status and give an overall summary.
Physical and biological monitoring at Prince 5 during 1998 a preliminary analysis
by F.H Page
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide This is a preliminary summary of the physical & biological monitoring conducted at the Prince 5 sampling station in 1998. The sampling effort is described along with preliminary results. At the time of preparation, analyses of all phytoplankton & zooplankton, & some nutrient & chlorophyll samples had not been completed. Some results may change.
Origins of two recruitment pulses of 0-group Atlantic cod (Gadus morhua) in Bonavista Bay, Newfoundland during 1999, determined from genetic variation
by Terry D Beacham
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide The question of whether the northern population of Atlantic cod is a single randomly-breeding aggregate or a complex of sub-populations with little genetic exchange between them has been hotly debated. The genetic structure of the northern population of Atlantic cod has been investigated since the 1970's. This study investigates the origins of 2 recruitment pulses of 0-group Atlantic cod using genetic variation. The authors examined variation at microsatellite loci & the synaptophysin locus. Variation was compared with 4 offshore & 5 inshore aggregations of adult cod.
Newfoundland and Labrador Atlantic salmon (Salmo salar) stock status summary for 1999, and methods to address possible causes for continuing low abundance and survival
by J.B Dempson
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide This report examines the status of Atlantic salmon stocks of Newfoundland & Labrador using information on annual returns to rivers and spawning escapements relative to conservation requirements, abundance of smolts, and trends in marine survival. Overall, 22 rivers in insular Newfoundland are assessed relative to conservation requirements. Factors potentially contributing to low abundance of some stocks & overall poor marine survival are identified along with suggestions as to how some of the factors could be further investigated.
Management of the Nova Scotia sea urchin fishery a nearly successful habitat based management regime
by R. J Miller
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide In the Nova Scotia green sea urchin (Strongylocentrotus droebachiensis) fishery, licensees fish either competitively, usually limited to the waters adjacent to one county, or fish restricted zones with only one license per area. There are no seasons and only a small area is regulated by quota. This paper describes the features of this fishery, discusses the advantages & drawbacks of its habitat-based management regime, and describes & presents results of sea urchin fishery surveys & monitoring. Finally, it discusses the effects on this fishery of sea urchin disease, the potential for new licenses, the fishery management plan implemented in 1995, the development & implementation of restricted fishing zones, the quota management system in Digby County, the kelp/urchin cycle, fishery management options, the sustainability of the urchin resource, research needs, and sea urchin fishery management in other North American jurisdictions.
Assessment of the status, vulnerability and prognosis for Atlantic salmon stocks of the Southern Upland of Nova Scotia
by P. G Amiro
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Book
)
3 editions published in 2000 in English and held by 4 libraries worldwide This paper assesses the stock status, vulnerability to extirpation, and prognosis for Atlantic salmon populations of the Southern Upland of Nova Scotia with respect to the impact of acidification & the recent 15 years of low marine survival. Management measures & techniques that may enhance the persistence and provide harvests of salmon in the Upland are evaluated. Measures involving stocking & pH manipulation to enhance the probability of persistence of the stocks and to provide harvests are assessed numerically. Outlooks for the stocks are forecast using the ASRAM simulation program and a deterministic model that estimates optimum parr density based on mean winter pH.
Spawning stock characteristics and cod recruitment success in the southern Gulf of St. Lawrence
by D. P Swain
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Book
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3 editions published in 2000 in English and held by 4 libraries worldwide This paper tests two predictions related to the effects of spawner characteristics on recruitment rate for cod in the southern Gulf of St. Lawrence. Analyses are presented regarding correlations between recruitment rate & measures of the age of spawners (mean age, proportion of older fish, age diversity) and between recruitment rate and measures of the mean size & condition of spawners.
Background information on the southern Gulf of St. Lawrence cod stock for the Fisheries Oceanography Committee workshop on the cod recruitment dilemma
by D. P Swain
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Book
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3 editions published in 2000 in English and held by 4 libraries worldwide This document presents background information on recruitment & other population parameters for the Gulf of St. Lawrence cod stock. Data are taken from recent stock assessment documents and sequential population analysis estimates of abundance mainly use the formulation accepted by Chouinard et al. (1999), updated to include 1999 data. Results are presented & discussed with regard to trends in spawning stock biomass, recruitment, recruitment rate, adult mortality, and growth rates.
Status of the Atlantic salmon (Salmo salar L.) stocks of Lomond River, Torrent River and Western Arm Brook, Newfoundland, 1999
by C. C Mullins
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Book
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3 editions published in 2000 in English and held by 4 libraries worldwide This publication assesses the status of Atlantic salmon stocks on three north-west Newfoundland rivers based on data from the recreational fishery and fish counting facilities. The effect of a commercial fishery moratorium & other management changes on adult salmon returns is examined based on fish count trends. Changes in spawning escapements are also evaluated relative to established conservation requirements. In addition, marine survival of smolts is evaluated relative to pre-moratorium years and possible causes of variable marine survival are discussed.
An Assessment of the cod stock in NAFO divisions 2J+3KL
by George R Lilly
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Book
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3 editions published between 1999 and 2000 in English and held by 2 libraries worldwide This report updates the status of the cod stock off southern Labrador & eastern Newfoundland, based on catch rates from the re-opened inshore fishery and an additional year of bottom-trawl research surveys, pre-recruit surveys, acoustic surveys in specific areas, sentinel surveys, and returns from tagging studies. Information on stock status is provided separately for the inshore & offshore. Sections of the report cover cod biology (stock structure, genetics, distribution, conceptual models of stock), the fishery & catch data, resource status, other considerations affecting cod stocks (sea temperature, predation), and the future outlook for the stock. more
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Audience Level
 Related IdentitiesAssociated Subjects
Atlantic cod Atlantic herring Atlantic herring fisheries Atlantic Ocean--Bay of Fundy Atlantic Ocean--Bonavista Bay Atlantic Ocean--Georges Bank Atlantic Ocean--Gulf of Saint Lawrence Atlantic salmon Atlantic salmon fisheries British Columbia Canada Canada--Atlantic Coast Canada--Atlantic Provinces Capelin Channel bass Clam fisheries--Management Clams Cod fisheries Coho salmon Crab fisheries Fisheries Fishery management Fishery resources Fishing surveys Fish populations Fish stock assessment Harp seal Lobster fisheries Mackerel fisheries Marine plankton Maritime Provinces Nekton New Brunswick Newfoundland and Labrador Newfoundland and Labrador--Gander River North Atlantic Ocean Nova Scotia Ocean temperature Periodicals Pollock Predation (Biology) Québec Salinity Scallop fisheries Sealing Shrimp fisheries Statistics Striped bass Surveys Witch flounder
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Alternative Names
Canada. Canadian Stock Assessment Secretariat
Canada. Dept. of Fisheries and Oceans. Canadian Stock Assessment Secretariat
Canada. Dept. of Fisheries and Oceans. Science. Canadian Stock Assessment Secretariat
Canada. Ministère des pêches et des océans. Sciences. Secrétariat canadien pour l'évaluation des stocks
Canada. Ministère des pêches et des océans. Secrétariat canadien pour l'évaluation des stocks
Canada. Secrétariat canadien pour l'évaluation des stocks
CSAS
SCÉS
Secrétariat canadien pour l'évaluation des stocks
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