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Canadian Manuscript Report of Fisheries and Aquatic Sciences No. 1695

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Canadian Manuscript Report of Fisheries and Aquatic Sciences No. 1695 DFO Library MPO B bliotheque III 11 !! 1111 II Adult Atlantic Salmon (Salmo salar) Investigations, Restigouche River System, New Brunswick, 1972-80 r) • 15 Fi J. L. Peppar I. Freshwater and Anadromous Division Fisheries Research Branch Department of Fisheries and Oceans Halifax, Nova Scotia, B3J 2S7 March , 1983 Canadian Manuscript Report of Fisheries and Aquatic Sciences No.1695 ski r7,555 'Dr/ Government of Canada Gouvernement du Canada Fisheries and Oceans Pêches et Océans Canadian Manuscript Report of Fisheries and Aquatic Sciences These reports contain scientific and technical information that represents an important contribution to existing knowledge but which for some reason may not be appropriate for primary scientific (i.e. Journal) publication. They differ from Tech- nical Reports in terms of subject scope and potential audience: Manuscript Reports deal primarily with national or regional problems and distribution is generally restrict- ed to institutions or individuals located in particular regions of Canada. No restriction is placed on subject matter and the series reflects the broad interests and policies of the Department of Fisheries and Oceans, namely, fisheries management, technology and development, ocean sciences, and aquatic environments relevant to Canada. Manuscript Reports may be cited as full publications. The correct citation appears above the abstract of each report. Each report will be abstracted by Aquatic Sciences and Fisheries Abstracts and will be indexed annually in the Department's index to scientific and technical publications. Numbers 1-900 in this series were issued as Manuscript Reports (Biological Series) of the Biological Board of Canada, and subsequent to 1937 when the name of the Board was changed by Act of Parliament, as Manuscript Reports (Biological Series) of the Fisheries Research Board of Canada. Numbers 901-1425 were issued as Manuscript Reports of the Fisheries Research Board of Canada. Numbers 1426-1550 were issued as Department of Fisheries and the Environment, Fisheries and Marine Service Manuscript Reports. The current series name was changed with report number 1551. Details on the availability of Manuscript Reports in hard copy may be obtained from the issuing establishment indicated on the front cover. Rapport manuscrit canadien des sciences halieutiques et aquatiques Ces rapports contiennent des renseignements scientifiques et techniques qui constituent une contribution importante aux connaissances actuelles mais qui, pour une raison ou pour une autre, ne semblent pas appropriés pour la publication dans un journal scientifique. Ils se distinguent des Rapports techniques par la portée du sujet et le lecteur visé; en effet, ils s'attachent principalement à des problèmes d'ordre national ou régional et la distribution en est généralement limitée aux organismes et aux personnes de régions particulières du Canada. Il n'y a aucune restriction quant au sujet; de fait, la série reflète la vaste gamme des intérêts et des politiques du Ministère des Pêches et des Océans, notamment gestion des pêches; techniques et développe- ment, sciences océaniques et environnements aquatiques, au Canada. Les Manuscrits peuvent être considérés comme des publications complètes. Le titre exact paraît au haut du résumé de chaque rapport, qui sera publié dans la revue Aquatic Sciences and Fisheries Abstracts et qui figuera dans l'index annuel des publi- cations scientifiques et techniques du Ministère. Les numéros de 1 à 900 de cette série ont été publiés à titre de manuscrits (Série biologique) de l'Office de biologie du Canada, et après le changement de la désignation de cet organisme par décret du Parlement, en 1937, ont été classés en tant que manus- crits (Série biologique) de l'Office des recherches sur les pêcheries du Canada. Les numéros allant de 901 à 1425 ont été publiés à titre de manuscrits de l'Office des recherches suries pêcheries du Canada. Les numéros 1426 à 1550 ont été publiés à titre de Rapport manuscrits du Service des pêches et de la mer, Ministère des Pêches et de l'Environnement. Le nom de la série a été changé à partir du rapport numéro 1551. La page couverture porte le nom de l'établissement auteur où l'on peut se procurer les rapports sous couverture cartonnée. Canadian Manuscript Report of Fisheries and Aquatic Sciences No. 1695 er. March, 1983 ADULT ATLANTIC SALMON (SALMO SALAR) INVESTIGATIONS RESTIGOUCHE RIVER SYSTEM, NEW BRUNSWICK, 1972-80 J.L. Peppar Freshwater and Anadromous Division Fisheries Research Branch Department of Fisheries and Oceans Halifax, Nova Scotia B3J 2S7 4 @ Minister of Supply and Services Canada 1983 Cat. No. Fs 97-4/1695 ISSN 0706-6473 iii CONTENTS LIST OF TABLES ABSTRACT/RÉSUMÉ vii INTRODUCTION 1 METHODS 1 RESULTS AND DISCUSSION 2 Wâter Temperatures Recorded at Trap 2 Relative Size, Timing and Composition of the Adult Salmon Run 2 Large Salmon Run 2 Grilse Run 2 Total Run 2 Biological Data From Salmon Sampled 3 Adult Salmon Tagging and Recapture 3 Large Salmon Data 3 Distant-Water Recaptures 3 Home-Water Recaptures 4 Grilse Data 4 Distant-Water Recaptures 4 Home-Water Recaptures 5 SUMMARY 5 ACKNOWLEDGEMENTS • . 6 REFERENCES 4 • 6 APPENDIX À - HOME-WATER RECAPTURES OF LARGE SALMON TAGGED AND RELEASED IN THE RESTIGOUCHE RIVER SYSTEM 19 APPENDIX B - DISTANT-WATER RECAPTURES OF LARGE SALMON TAGGED AND RELEASED IN THE RESTIGOUCHE RIVER SYSTEM 25 APPENDIk C - HOME-WATER RECAPTURES OF GRILSE TAGGED AND RELEASED IN THE RESTIGOUCHE RIVER SYSTEM • • • 27 APPENDIX D - DISTANT-WATER RECAPTURES OF GRILSE TAGGED AND RELEASED IN THE RESTIGOUCHE RIVER SYSTEM • • 29 APPENDIX E - STATISTICAL DIVISIONS OF THE INTERNATIONAL COMMISSION FOR THE NORTHWEST ATLANTIC FISHERIES (ICNAF) 31 APPENDIX F - NEWFOUNDLAND FISHERIES STATISTICAL • DISTRICTS 33 k LIST OF TABLES TABLE 1. Mean maximum water temperatures recorded at the Restigouche sampling trap, Dalhousie, New Brunswick, 1972-80 TABLE 2. Mean minimum water temperatures recorded at the Restigouche sampling trap, Dalhousie, New Brunswick, 1972-80 7 TABLE 3. Large-salmon catch statistics, Restigouche sampling trap, Dalhousie, New Brunswick, 1972-80 8 TABLE 4. Catches per fishing day of large salmon, Restigouche sampling trap, Dalhousie, New Brunswick, 1972-80 8 TABLE 5. Percentages of total season catches of large salmon taken during successive semi-monthly periods at Restigouche sampling trap, Dalhousie, New Brunswick, 1972-80 9 TABLE 6. Grilse catch statistics, Restigouche sampling trap, Dalhousie, New Brunswick, 1973-80 9 TABLE 7. Catches per fishing day of grilse, Restigouche sampling trap, Dalhousie, New Brunswick, 1973-80. 10 TABLE 8. Percentages of total season catches of grilse taken during successive semi-monthly periods at Restigouche sampling trap, Dalhousie, New Brunswick, 1973-80 10 TABLE 9. Average lengths and weights and sex composition, determined on a semi-monthly basis for large salmon sampled (accidental mortalities only, 1972 & 1977-80) at Restigouche sampling trap, Dalhousie, New Brunswick, during the period 1972-80 11 TABLE 10. Average lengths and weights and sex composition, determined on a semi-monthly basis for grilse sampled (accidental mortalities only, 1974-80) at Restigouche sampling trap, Dalhousie, New Brunswick, during the period 1973-80 12 TABLE 11. Scale-data analysis, average fork lengths by sex, for each sea-age group, for samples collected 1972-80, Restigouche sampling trap, Dalhousie, New Brunswick 13 vi TABLE 12. Scale-data analysis, average weights by sex, for each sea-age group, for samples collected 1972-80, Restigouche sampling trap, Dalhousie, New Brunswick 14 TABLE 13. Restigouche River adult salmon tagging at Dalhousie, 1972-77, and recaptures to January, 1981 15 TABLE 14. Recaptures from Restigouche large salmon (2- and 3-sea-winter fish) tagging, Dalhousie, New Brunswick, 1972-77; tag returns to January, 1981, by year of recapture 15 TABLE 15. Recaptures from Restigouche River large salmon (2- and 3-sea-winter fish) tagging, Dalhousie, New Brunswick, 1972-77; tag return to January, 1981, by method and year of recapture 16 TABLE 16. Sport-fishing recoveries of large salmon tagged 1972-77 at the Restigouche sampling trap, Dalhousie, New Brunswick; tag returns to January, 1981 17 TABLE 17. Recaptures from Restigouche grilse (1-sea- winter fish) tagging, Dalhousie, New Brunswick, 1973-77; tag returns to January, 1981, by year of recapture 17 TABLE 18. Recaptures from Restigouche River grilse (1-sea-winter fish) tagging, Dalhousie, New Brunswick, 1973-77; tag returns to January, 1981, by method and year of recapture 18 TABLE 19. Sport-fishing recoveries of grilse tagged 1973-77 at the Restigouche sampling trap, Dalhousie, New Brunswick; tag returns to January, 1981 18 vii ABSTRACT Peppar, J.L. 1983. Adult Atlantic salmon (Salmo salar) investigations, Restigouche River system, New Brunswick, 1972-80. Can. MS Rep. Fish. Aquat. Sci. No. 1695. viii + 33 p. Trapping and tagging of ascending adult Atlantic salmon was conducted near the head of the Restigouche River estuary (near Dalhousie, New Brunswick) each year over the period 1972-80. As part of a program of salmon investigations to collect stock-assessment data over the period of the Restigouche commercial salmon-fishing closure, this study provided a basic index of run timing, relative run size and run composition; and assessed, through tagging, the migration routes and sites of potential exploitation by home- and distant-water fisheries. The investigation also enabled the gathering
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