Bottom Trawl Surveys - Proceedings of a Workshop Held at Ottawa ...

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TABLE OF CONTENTS/TABLE DES MATIERES
Abstract/Resume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Opening Remarks/ Allocution d'ouverture
by/de M.C. Mercer ............................................................ .
Workshop Report/Rapport de !'atelier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
List of Participants/Liste des participants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Historical Review and Impact of Surveys on Management Advice/Revue historique des
releves et leur incidence sur les avis de gestion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
A History of Canadian Groundfish Trawling Surveys and Data Usage in ICNAF Divisions
4 TVWX, by R. G. Halliday and P.A. Koeller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
A Critique of Research Vessel Otter Trawl Surveys by the St. John's Research and
Resource Services, by T.K. Pitt, R. Wells and WD. McKone.......................... 42
A Brief Historical Review of the Woods Hole Laboratory Trawl Survey Time Series, by
T. R. Azarovitz ...................... , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Abundance Estimates of the Trawlable Resources around the Islands of St. Pierre and
Miquelon (NAFO Subdiv. 3Ps): Methods used During the French Research Surveys and
Discussion of Some Results, by A Forest and J.P. Minet............. . . . . . . . . . . . . . . . . . 68
Use of Trawl Survey Data in Assessments, by S.H. Clark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Catch Projections and their Relation to Sampling Error of Research Surveys, by
D. Rivard ........... : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Survey Design/Schemas d'echantillonnage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lll
A Brief Review of Survey Methodology with regard to Groundfish Stock Assessment
by B.M. Leaman ............................................................ , .. 113
Groundfish Survey Techniques as Applied to Abundance Surveys for Shrimp, by
D. G. Parsons and E.J. Sandeman ................................................. 124
Estimation/Estimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7
Abundance Estimators Based on Stratified Random Trawl Surveys, by M. Pennington
and B.E. Brown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
A Comparison of Estimators of Location for Skewed Populations, with Applications to
Groundfish Trawl Surveys. by S.]. Smith ......................... , , ........ , , . . . . . . 154
A Method of Estimating the Abundance of Survivors of an Exploited Fish Population
Using Commercial Fishing Catch at Age and Research Vessel Abundance Indices, by
W.O. Doubleday... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164