WorldCat Identities

Canadian Stock Assessment Secretariat

Overview
Works: 674 works in 1,460 publications in 1 language and 8,282 library holdings
Genres: Surveys 
Publication Timeline
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Most widely held works by Canadian Stock Assessment Secretariat
Catch-at-age of northwest Atlantic harp seals by Garry B Stenson( Book )

8 editions published between 1999 and 2000 in English and held by 9 WorldCat member libraries worldwide

Information on catch levels and the age structure of the catch (catch-at-age) is necessary for accurate population estimation and responsible management of the harp seal (Phoca groenlandica) in the Northwest Atlantic. Harp seals are hunted off southern Labrador and the northeast coast of Newfoundland (the Front), in the Gulf of St. Lawrence, along west and southeast Greenland, and the eastern Canadian Arctic. This report summarizes available harp seal catch and catch-at-age statistics from 1952 to 1999 for each of these areas
Assessments of Atlantic salmon stocks in southwest New Brunswick, 1999 by T. L Marshall( Book )

6 editions published in 2000 in English and held by 7 WorldCat member libraries worldwide

This paper reviews the status of Atlantic salmon habitat, stocks, returns, and projected outlook for stocks in the following south-east New Brunswick rivers: St. John (upstream of Mactaquac), Nashwaak, Kennebecasis, Hammond, Magaguadavic, and St. Croix. The degree to which each river's stock has met its conservation requirement is also noted and fishery management considerations are discussed
The status of redfish in Unit 2 by D Power( Book )

7 editions published between 1999 and 2000 in English and held by 7 WorldCat member 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
1999 pup production of harp seals (Phoca groenlandica) in the northwest Atlantic by Garry B Stenson( Book )

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

The objective of this study was to estimate the pup production of harp seals in the Northwest Atlantic. Aerial surveys were conducted off southern Labrador and eastern Newfoundland (the Front), and in the northern and southern Gulf of St. Lawrence during March 1999. Whelping concentrations were located, and photographic and visual surveys were conducted on these concentrations. Photographic counts were corrected for misidentified pups by comparing multiple readings of photographs made by 2 or more readers. Survey estimates were also corrected for pups absent from the ice at the time of the survey using the occurrence of distinct age-related developmental stages
Estimating pup production and population size of the northwest Atlantic harp seal (Phoca groenlandica) by B.P Healey( Book )

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

The objective of this study is to estimate current population size of Northwest Atlantic harp seals using an age structured population model, incorporating recent estimates of reproductive rates, unreported mortality, and pup production. Replacement yields (in units of total removals) and the corresponding levels of reported catch in the Canadian Front and Gulf that would provide such yields are calculated, assuming that other hunt components take the same number of animals as each component did in 1999. In addition, the study presents an estimate of population size in 2005 and 2010 if these replacement yields are taken in the intervening period. Uncertainty in these estimates was determined incorporating the error associated with the available pup production estimates
Distribution and abundance of demersal juvenile cod (Gadus morhua) on the northeast Newfoundland Shelf and the Grand Banks, divisions 2J3KLNOP implications for stock identity and monitoring by G. R Lilly( Book )

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

Ontogenetic changes in distribution have been described for most cod stocks. For northern cod, occupying waters off southern Labrador & eastern Newfoundland, the historic model has been that of spawning offshore, advection of pelagic stages to the inshore, & gradual adoption of seasonal migration. The purpose of this paper is to examine ontogenetic changes in the distribution of juvenile cod in offshore & nearshore waters. Data from autumn surveys are examined together, as are data from spring surveys. The autumn surveys cover the stock areas of 2 cod stocks & the spring surveys cover the stock areas of 2 other cod stocks & parts of 2 additional stocks. These geographic scales are broader than those usually considered during assessments of individual stocks & may provide additional insight into stock affinities
Trawl and acoustic survey in southern Bonavista Bay observations on demersal distribution of Atlantic cod by J. T Anderson( Book )

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

Historically, the inshore bays along the northeast of Newfoundland have been the predominant refugia for demersal juvenile cod. Surveying fish distribution and abundance in the inshore area requires innovative techniques that combine high resolution acoustic technology with trawls adapted to sampling relatively small areas over rough bottom. This report contains the preliminary results from an acoustic and trawl survey in southern Bonavista Bay in November and December of 1999
The Stock status of Atlantic salmon (Salmo salar L.) in Paradise River, Labrador in 1999 by D. G Reddin( Book )

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

This report describes & presents results of an Atlantic Salmon assessment project completed in 1999 on Paradise River, Labrador. This was the first successful assessment of a salmon stock in southern Labrador since 1996. The number of salmon entering Paradise River was estimated by mark recapture. Salmon were captured & marked in the estuary and then recaptured upstream at a tributary counting fence and in salmon traps set out in a pond in the main stem of the system. In total, about 800 salmon were caught at all sites. Results are presented with regard to total river returns, spawning escapement, egg deposition, salmon counts, conservation requirements, and accessible habitat
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( Book )

5 editions published in 2000 in English and held by 6 WorldCat member 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
Results of data conversions for American plaice in div. 2J and 3K from comparative fishing trials between the Engel otter trawl and the Campelen 1800 shrimp trawl by M. Joanne Morgan( Book )

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

In fall 1995, the Dept. of Fisheries & Oceans changed its survey trawl from an Engel 145 high rise otter trawl with bobbin gear to a Campelen 1800 shrimp trawl using rockhopper gear. In the Labrador to north-east Newfoundland coast area, there was also a change in research vessels. In order to establish a link between the two sets of survey data, comparative fishing trials were conducted in 1995 to develop length-based conversion factors between the two fishing gear/vessel combinations. This report describes the development & application of conversion factors from those trials along with tables of data showing the results
Status of the Rocky and Little Rivers stocks of Atlantic salmon (Salmo salar L.) of the Newfoundland Region in 1999 by Charles Edward Bourgeois( Book )

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

This paper reviews the status of Atlantic salmon stocks in two southern Newfoundland watersheds that have undergone enhancement/fry stocking activities. Results of research are presented with regard to egg deposition, smolt counts, smolt to adult survival, egg/fry to smolt survival, spawning distribution, parr survival, and adult returns
The Status of redfish in division 3O by D Power( Book )

6 editions published between 1999 and 2000 in English and held by 6 WorldCat member libraries worldwide

This report presents data on redfish based on both commercial and research survey data, including nominal catches, catch at length, abundance estimates, and recruitment. It discusses environmental considerations, industry perspectives and sources of uncertainty. Includes prognosis
Lower bounds on the exploitation of cod (Gadus morhua) in NAFO divs. 3KL and subdiv. 3Ps during 1997-99 from tagging experiments by Noel G Cadigan( Book )

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

This report describes & presents results from a model developed to estimate exploitation rates (fraction of stock removed by the fishery) using tags returned from the commercial fisheries for Atlantic cod in NAFO Divisions 3KL & Subdivision 3Ps & adjacent areas during 1997-99. The model involves length- and gear-based exploitation rates and incorporates methods to estimate tagging mortality, tag loss, tag reporting rates, and fish growth. This model is used to estimate weekly exploitation rates in 3KL & 3Ps, but the focus is on exploitation in 3KL during the two time periods in which most of the commercial catch in 1999 was taken. The model's estimates represent the fraction of the tagged population exploited by the fishery if there was no migration. Using the reported landings for the two periods, the biomass of fish in 3KL is also estimated
Estimation of cod (Gadus morhua) growth in NAFO subdiv. 3Ps and divs. 3KL in 1997-99 from tagging experiments by Noel G Cadigan( Book )

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

This report describes & presents results from a model used for estimating growth of Atlantic cod in NAFO Subdivision 3Ps and Divisions 3KL during 1997-99. Information from tag returns from the commercial, sentinel, & food fisheries in these regions during 1997-99 is used to estimate growth based on known lengths-at-release & times-at-liberty. The model incorporates the Von Bertalanffy growth model, modified to accommodate seasonal variations in growth, as well as a measurement bias component. The basic approach has been studied fairly extensively in the fisheries literature, and the paper presents a review of this literature. Important biases in estimating growth from tagging data are identified, and the magnitude of the bias in the analysis is estimated using a simple simulation. The estimated model is used to predict cod growth for times-at-liberty ranging from 0 to 3 years, and for fish lengths ranging between 40 & 90 centimetres
Distribution and biomass of capelin, Arctic cod and sand lance on the northeast Newfoundland Shelf and Grand Bank as deduced from bottom-trawl surveys by G. R Lilly( Book )

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

Small planktivorous fish might influence recruitment to stocks of Atlantic cod (Gadus Morhua) in 2 major ways. As predators they may consume the eggs, larvae or small juveniles of the cod. As prey, them may influence the quantity of food consumed by mature cod. To assist in study of the effect that changes in the biomass of small pelagics might have had on the dynamics of northern cod, the relative abundance & distribution of small pelagics is described from their by-catch during standard resource assessment bottom-trawl surveys. This paper documents changes in the relative biomass & distribution of capelin, Arctic cod & sand lance
Status of the Exploits River stock of Atlantic salmon (Salmo salar L.) in 1999 by Charles Edward Bourgeois( Book )

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

This paper reviews the status of the Atlantic salmon stock in the Exploits River, the largest watershed in insular Newfoundland. Methods used include enumeration of fish at three fishway locations, an angling survey, collection of biological data, and determination of egg depositions. Results are presented regarding smolt & adult characteristics, freshwater escapement, recreational catch, run timing, and percent of conservation requirement achieved
Ecosystem effects on pre-recruit survival of cod in the southern Gulf of St. Lawrence by D. P Swain( Book )

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

The recruitment rate of cod in the southern Gulf of St. Lawrence was remarkably high from the mid-1970s to the early 1980s, a rate that contributed to the rapid recovery of this stock from low levels of abundance. This report attempts to find an explanation for this unusually high recruitment rate by examining relationships between apparent pre-recruit survival of southern Gulf cod and ecosystem factors that might be expected to influence early survival, such as climate variables and potential predators of cod eggs & larvae (pelagic fishes) or cod juveniles (seals). The effects of these factors are tested by including them as covariates in the stock-recruitment relationship of southern Gulf cod. The research uses two independent time series of recruitment & spawning biomass, one based on mean catch per tow in research surveys and one estimated using sequential population analysis. Ecosystem effects were tested using statistical methods
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( Book )

5 editions published in 2000 in English and held by 5 WorldCat member 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
Northern cod recruitment before, during and after collapse by Peter A Shelton( Book )

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

This paper shows that recruitment signals are present in the research vessel & commercial catch at age data for northern cod from extension of jurisdiction to moratorium. There have been 3 main periods of strong recruitment, preceded & followed by brief periods of much lower recruitment. SPA provides good model fits to the 1st two pulses but is unable to reconcile survey & catch data with respect to the 3rd pulse, under standard assumptions. This document uses a diagnostic formulation that estimates unaccounted for deaths in the early 1990s to evaluate recruitment before & during the collapse. It reconstructs a relative recruitment strength series for the post-collapse period from a number of indices using an iterative reweighting procedure
Recruitment, pre-recruit survival and mortality in three Newfoundland cod stocks northern (2J3KL), southern Grand Banks (3NO) and St. Pierre Bank (3Ps) by J. T Anderson( Book )

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

Indices of recruitment, spawning stock biomass, survival and modelled estimates of mortality based on research vessel survey data were examined from the most recently available assessment documents. This paper represents a summary of these indices for the 3 cod stocks in the Newfoundland region. To gain insight into the role of environmental factors that may affect survival, 3 different environmental indices were examined and related to the Newfoundland cod survival indices
 
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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 (109)