WorldCat Identities

Canadian Stock Assessment Secretariat

Overview
Works: 665 works in 1,483 publications in 2 languages and 9,798 library holdings
Genres: Surveys 
Publication Timeline
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Most widely held works by Canadian Stock Assessment Secretariat
Effects of soak time on catch per unit effort using longline and gillnets for the Northern Gulf of St. Lawrence cod stock = Effets du temps d'immersion sur les prises par unité d'effort des filets maillants et de la palangre pour le stock de morue du nord du golfe du Saint-Laurent by Marthe Bérubé( Book )

6 editions published in 2000 in English and French and held by 6 WorldCat member libraries worldwide

In the case of Northern Gulf cod, the catch per unit effort (CPUE) values for gillnets and longlines under the Sentinel Fisheries Program are used as a complementary index to the abundance assessment. The aim of this study was to determine the effect of soak time on the CPUE for these gear types. The data used came from the results of the Sentinel Fisheries Program between 1995 and 1999, and from the Index Fishermen's Program for 19990-1993. The study provides a more current picture of a potential significant link between the soak time and the CPUE by drawing a trend curve, and by performing non-linear regressions on aggregated data. Then, by using a multiplicative model of variance, it tests the integration of the soak time in the model and the effect of data suppression on the model
Assessment of the 1999 snow crab, Chionoecetes opilio, fisheries off western Cape Breton, Areas 18 and 19 by P Degrace( Book )

6 editions published in 2000 in English and French and held by 6 WorldCat member libraries worldwide

This stock assessment of western Cape Breton snow crab fisheries was done based on the information collected from fishermen's logbooks and processor's sales slips, at-sea and port sampling, and post-season trawl surveys. The report provides a description of the fisheries, discusses the results of the assessment, provides biomass and recruitment estimates, and suggests exploitation rates
A Review of the 1999 Newfoundland and Labrador scallop fishery by K. S Naidu( Book )

6 editions published in 2000 in English and held by 5 WorldCat member libraries worldwide

This document reviews by area recent trends in the Newfoundland scallop fishery. The main section presents catch & landed size frequencies, research survey results, and estimated biomass for the Strait of Belle Isle. The other sections review fishery activity in the St. Pierre Bank, Grand Bank, and Labrador zones
Assessment of NAFO Division 4T winter flounder by Roderick Morin( Book )

6 editions published in 1998 in English and held by 5 WorldCat member libraries worldwide

Winter flounder is a flatfish species distributed in the Northwest Atlantic from southern Labrador to Georgia. This document describes the current status of the 4T winter flounder resource. It reviews events in the 1997 and 1998 fisheries and biological information originating from the commercial fishery and from research surveys. It also discusses such issues as the need for improved landing statistics for winter flounder, including logbooks for fixed gear fisheries, the need for additional surveys to sample winter flounder in shallow water, and the appropriateness of regulations on minimum mesh size in the mobile gear fisheries
Status in 1999 of coho stocks adjacent to the Strait of Georgia by K. S Simpson( Book )

5 editions published in 2000 in English and held by 4 WorldCat member libraries worldwide

This paper presents an assessment of the coho salmon stocks in the Georgia Basin, defined as Canadian drainages that empty into the Strait of Georgia, including the Fraser River system as far upstream as Hope. The assessment relies on using some stocks to represent others in the same area. These indicator stocks include all wild & most hatchery stocks that have reliable smolt release, catch, and escapement data. Interpretation of data obtained from indicator stocks is supplement with extensive assessments of fry densities. Estimates of some escapements use analyses of counts from multiple visits. Results are presented regarding juvenile abundance, catch, catch distribution, escapement, exploitation, and marine survival
A preliminary review of a new model based on test fishing data analysis to measure abundance of returning chum stocks to the Fraser River by W. J Gazey( Book )

5 editions published in 2000 in English and held by 4 WorldCat member libraries worldwide

A test fishery has operated at Albion on the Fraser River since 1978 to provide the means for an index of chum salmon abundance (escapement) within a season. Recent degradation of the accuracy & consistency of escapement estimates has seriously undermined the potential of this test fishery to evaluate a stepped harvest rate management strategy (known as clockwork management) for Fraser River chum salmon. The purpose of this paper is to cast the in-season estimation problem into a Bayesian framework that incorporates preseason knowledge of run size & migration timing, in-season information on migration timing, and a predictive regression to calibrate run size to the historical record. The paper describes the test fishery data collected and the subsequent calculation of the cumulative catch per unit effort statistic, which is used as an unbiased index of abundance. A time density model for fish passage at Albion is then described and parameters of interest & available data are defined. Finally, a predictive posterior model is presented and all the ensuing distributional components are specified
Assessment of Pacific cod in Hecate Strait, Nov. 2000 by Alan Sinclair( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This assessment of Pacific cod in Hecate Strait, British Columbia begins with a description of the fishery since the mid-1950s. This is followed by a detailed analysis of the spatial & seasonal characteristics of the fishery since 1994. A catch per unit effort time series is presented for 1954 to 2000 and used as an index of abundance for the stock in an analytical assessment. New data from a 2000 groundfish assemblage survey are included as well as a surplus production analysis of stock status. Results of that analysis are discussed in relation to biological reference points for management and uncertainties in the assessment are noted
Harvesting Methuselah's clam's-Is the geoduck fishery sustainable, or just apparently so? by J. M Orensanz( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

Geoducks (Panopea abrupta) are very large, long-lived bivalves with potential life-spans well beyond 100 years. Such life-spans should be expected to confer great stability to these populations. This paper re-examines information about the ecology & dynamics of geoduck populations in Washington State & British Columbia, and explores the implications for stock assessment & management. It reviews geoduck biology & the fishing process, identifies strengths & shortcomings of two management systems, and highlights urgently-needed information. Analyses are presented to show long-term recruitment trends over a large spatial scale and to compare recent recruitment with that during the 1930's. Recommendations are provided regarding the most urgently needed research
Quota options for the Geoduck Clam (Panopea abrupta) fishery in British Columbia for 2001 and 2002 by C. M Hand( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This report presents calculations of quota options for geoduck clams (Panopea abrupta) for the 2001 & 2002 fisheries presented by Geoduck Management Area for the North Coast Region, West Coast of Vancouver Island Region, and Inside Waters Region of British Columbia. The calculations use new parameter estimates and a habitat-based approach continued from previous assessments where, for each geoduck bed, virgin biomass is estimated as the product of the spatial area of geoduck beds, estimated virgin densities, and mean geoduck weights. Error ranges in each parameter estimate were combined to provide a range of biomass estimates, and a harvest rate of 1% was applied to derive quota options
Feasibility of a bottom trawl survey for three slope groundfish species in Canadian waters by P. J Starr( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This paper evaluates the feasibility of conducting research surveys using commercial bottom trawl gear targeted at three slope groundfish species located on the Pacific coast of Canada. The objectives of such a survey are to generate comparable indices of population size over time which can be used as inputs into population assessment models for each of the species (longspine & shortspine thornyheads, Pacific Ocean perch). This feasibility analysis is based on the calculation of the variability in catch per hour for each species from commercial catch & effort data to determine the amount of stratification by depth and the number of tows required in each stratum to achieve a target level of precision. Several alternative options for number of strata & suggested levels of precision are presented, ranging from under 150 tows to nearly 400 tows for the entire survey, along with estimates of relative costs
Review of the 1999 return of Barkley Sound Sockeye salmon and forecasts for 2000 by Kim D Hyatt( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This paper provides a brief update of Barkley Sound (west coast Vancouver Island) sockeye salmon forecasts which focusses on: appraisal of the performance of the 1999 forecasts relative to actual returns; provision of return year 2000 forecasts; and commentary on the implications of the 1999 & 2000 forecasts for year 2000 harvest planning. Three forecast techniques are discussed: the survival stanza method, the sea survival/salinity method, and the salmon enhancement biostandard method
Estimated bycatch in the British Columbia shrimp trawl fishery by N. H Olsen( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

The focus of this paper is to provide information on the bycatch in the British Columbia shrimp trawl fishery, other than the bycatch of halibut & euchalon. The information was gathered from bycatch sampling conducted over 1997-99 in 20 different shrimp management areas, with most sampling carried out on otter trawlers off the west coast of Vancouver Island and in Queen Charlotte Sound. Coverage of beam trawlers was more limited and focussed on inshore areas and the Strait of Georgia. Results are presented & discussed with regard to bycatch observer coverage, bycatch composition & amount, variations in bycatch per unit effort, and bycatch & bycatch management strategies used in other fisheries
Persistent Organic Pollutants (POPs) in British Columbia harbour seals and killer whales by R. F Addison( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This paper summarizes current knowledge of persistent organic pollutants (POPs) in Pacific marine mammals, with an emphasis on British Columbia. POPs include insecticides, dioxins, furans, and industrial polychlorinated biphenyls. Most of the data presented refer to harbour seals (Phoca vitulina) and killer whales (Orcinus orca). The focus is on two aspects of the subject: trends in POP concentration, both spatial & temporal; and impacts on marine mammals in terms of sub-lethal effects. Background information is also included on the sources & environmental behaviour of POPs and the factors affecting POP distribution in marine mammals
Status in 1999 of coho stocks on the west coast of Vancouver Island by D Dobson( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This paper provides scientific advice concerning the overall status of coho salmon populations on the west coast of Vancouver Island (WCVI). The purpose is to evaluate the impact of recent management actions on stock abundance and to assess, in a general sense, what level of exploitation can be sustained given current productivity. The assessment information includes survival & exploitation rates of indicator stocks, catch & distribution of fisheries, and abundance data from juvenile & escapement surveys
Lingcod stock assessment and recommended yield options for 2001 by J. R King( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This report assesses lingcod (Ophiodon elongatus) stocks in the Strait of Georgia, south-west & north-west coasts of Vancouver Island, Queen Charlotte Sound, Hecate Strait, and the west coast of the Queen Charlotte Islands. For each area, information is presented on the fishery & its management, catch, climate & ocean regime considerations, stock condition, and yield options. Interpretation of stock condition relies on recent trends in catch statistics and limited age composition data from the commercial trawl fishery. The report also includes information on lingcod biology, the history of the British Columbia lingcod fishery, and climate/ocean regimes in the north Pacific
Structure of yelloweye rockfish (Sebastes ruberrimus) populations in British Columbia by Kae Lynne Yamanaka( Book )

5 editions published in 2000 in English and held by 3 WorldCat member libraries worldwide

This report describes & presents results of genetic analyses of about 2,500 yelloweye rockfish at 13 microsatellite loci. Samples were collected from north-west Vancouver Island to south-east Alaska as well as Bowie Seamount. The analysis of the distribution of genetic variation within & among samples is provided along with a summary of biological data collected in conjunction with the genetic samples. Implications of the results for fishery management are discussed
Evaluation of horse clam stock dynamics for a directed subtidal horse clam (Tresus capax and tresus nuttallii) fishery in British Columbia by Z Zhang( Book )

4 editions published in 2000 in English and held by 1 WorldCat member library worldwide

Biological information essential for addressing ecological concerns, assessing population stock dynamics, and evaluating fishing strategies for a directed fishery proposed for horse clams were examined. The depth distribution of horse clams appeared to extensively overlap with geoducks in the subtidal zones. The possible detrimental effect caused by horse clam exploitation on geoduck populations is, at present, unknown and should be examined in the future. The current depth restriction for horse clam and geoduck fishing, which is shallower than 10 feet below chart datum, appears to be inadequate to sufficiently protect the eelgrass habitat in some areas. A general survey protocol was outlined for obtaining biological and ecological information, such as horse clam biomass, natural mortality rate, growth, and eelgrass distribution. A computer stochastic model was developed to evaluate the effect of alternative fishing schemes and exploitation rates on the reproduction potential of horse clam populations, based on known natural mortality and growth rates and age at vulnerability of fishing. Highly precautionary biological reference points were recommended for the initial phase of the directed fishery
Assessment of rivers and Smith inlet sockeye salmon, with commentary on small sockeye salmon stocks in statistical area 8 by D. T Rutherford( Book )

4 editions published in 2000 in English and held by 1 WorldCat member library worldwide

Rivers Inlet (Owikeno Lake) and Smith Inlet (Long Lake) sockeye salmon stocks have shown recent dramatic declines in total abundance. Similar declines in total abundance of sockeye originating from Statistical Area 8 are also documented. All available data indicate that the critically low sockeye returns to both Rivers and Smith Inlet in 1999 and 2000 resulted from very poor marine survival for three consecutive brood years (1994-1996), not a failure in freshwater productivity. Marine survival indices for Owikeno and Long Lake indicate that marine survival has generally been poor for all brood years entering the ocean in 1992-1998. The critically low escapements in 1999 and 2000 are a result of the compounding effect of poor marine survival and low brood year escapements. If marine survival continues to be poor for rivers and Smith Inlet sockeye, drastic measures may be required to prevent a downward spiral to extirpation. On the other hand, if marine survival returned to normal for sea-entry year 1999, returns to Rivers Inlet will exceed the escapement target in 2001 as a result of the above target escapement in 1997. This is not the case for Smith Inlet where escapements have been well below target since 1995
Development of a fishery for Tanner crab (Chionoecetes tanneri) off the coast of British Columbia by G. D Workman( Book )

4 editions published in 2000 in English and held by 1 WorldCat member library worldwide

This paper constitutes a progress report on the ongoing Phase 1 prerequisites for the development of a fishery for the deep water Tanner crab. Brief summaries of the methods and results of a DFO trawl survey and an Industry trap survey of Tanner crab are presented. Methods employed to estimate the abundance of Tanner crab and calculate total allowable removals (TAR) or harvest are described. The paper also identifies other sources of by-catch and mortality identified through data mining projects. The benefits and shortcomings of the current assessment methodology are discussed, as are the potential gear conflicts and habitat/ecosystem impacts of deep-water fisheries and possible management approaches to the fishery. Finally, recommendations for the future development of the fishery are presented and further research needs are identified
Stock assessment of rock sole and English sole in Hecate Strait for 2000/2001 by J Fargo( Book )

4 editions published in 2000 in English and held by 1 WorldCat member library worldwide

In this document, biological information is summarized and the results of catch-age analysis for stocks of rock sole and English sole in Hecate Strait are presented. A state space catch-age model is used to reconstruct stock history for both species. The results of the catch-age analysis are compared to those obtained using swept-area expansions of commercial and research survey catch rate data. Yield recommendations are estimated by applying target fishing mortality reference points to the most current estimates of biomass. This information is synthesized to provide advice to managers on harvest levels for the 2001/2002 fishing year
 
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Alternative Names

controlled identityCanada. Department of Fisheries and Oceans

controlled identityCanadian Science Advisory Secretariat

Canada. Canadian Stock Assessment Secretariat

Canada. Department of Fisheries and Oceans. 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

Languages
English (98)

French (2)