Department of Fisheries and Oceans Ministère des pêches et océan s Canadian Stock Assessment Secretariat Secrétariat canadien pour l'évaluation des stocks Research Document 97/11 8 Document de recherche 97/11 8 Not to be cited without Ne pas citer sans permission of the authors ' autorisation des auteurs' Stock Status of Atlantic Salmon on the Eastern Shore of Nova Scotia, Salmon Fishing Area 20, in 199 5 by S .F. O'Neil, C .J . Harvie, and D.A. Longard Diadromous Fish Divisio n Department of Fisheries and Oceans P.O . Box 550 Halifax, Nova Scotia B3J 2S7 1 This series documents the scientific basis for 1 La présente série documente les bases the evaluation of fisheries resources in Canada . scientifiques des évaluations des ressources As such, it addresses the issues of the day in halieutiques du Canada . Elle traite des the time frames required and the documents it problèmes courants selon les échéanciers contains are not intended as definitive dictés. Les documents qu'elle contient ne statements on the subjects addressed but doivent pas être considérés comme des rather as progress reports on ongoing énoncés définitifs sur les sujets traités, mais investigations . plutôt comme des rapports d'étape sur les études en cours. Research documents are produced in the Les documents de recherche sont publiés dans official language in which they are provided to la langue officielle utilisée dans le manuscrit the Secretariat . envoyé au secrétariat. 2 TABLE OF CONTENTS ABSTRACT . .. ... ... .. .. .. .. ... ... .. ... .. ... .. .. ... ... .. ... ... ... .. ... .. ... ... .. .. ... .. ... .. .. ... .. ... .. ... .. .. ... ... .. ..3 SUMMARY SHEET FOR LISCOMB RIVER .. .. .. ... ... ... ... ... ... .. ... .. ... ... .. .. ... .. ... .. .. ... ... .. .. .. ... ... .. .. .4 SUMMARY SHEET FOR ST. MARY'S RIVER .. ... ... ... ... ... ... .. .. ... .. ... .. ... ... .. .. ... .. ... .. ... ... ... .. ... ... ... ... .5 INTRODUCTION . .. .. ... ... .. ... .. ... .. .. ... ... ... .. .. .. ... .. .. ... .. .. ... .. ... ... ... ... .. .. ... .. ... .. .. ... ... .. .. .7 EAST RIVER, SHEETI-IARBOUR . .. .. .. .. .7 LISCOMB RIVER . .. .. .. .. ô SALMON RIVER, GUYSBOROUGH . .. .8 ST . MARY'S RIVER . .. .. .H WESTRIVER, SHEETI-IARBOUR . .9 DESCRIPTION OF FISHERIES AND FISHERY DATA ... .. ... .. .. ... ... .. ... .. ... .. .. ... ... .. .. .. ... ... .. .. ... .. ... .9 EAST RIVER, SHEET HARBOUR . .. .. 10 ST. lV1ARY'S RIVER . .. .. 10 CONSERVATION REQUIRE MENTS .. ... .. .. .. ... .. .. ... .. ... ... .. ... .. .. .. ... ... .. .. ... .. ... .. .. ... ... .. .. .. .. ... .11 SFA 20. .. .. I 1 LISCOMB IZIVER . .. .. .. 1 1 ST. MARY'S RIVER . .. .. .. .. .. 1 1 Habitat area estimation : On-site versus remote measure . .11 Egg and adult reguirements . .12 WEST RIVER, SHEET HARBOUR . .. .. 12 RESEARCH DATA . .. ... ... ... .. ... .. ... ... .. .. .. ... .. ... ... .. ... .. .. ... .. ... .. ... ... .. .. ... .. ... .. ... ... ... .. .. ... .12 ST . MARY'S RIVER . .. .. .. 12 PROCEDURES FOR FORECASTING ADULT RETURNS . ... .. ... .. ... ... .. .. .. ... ... .. .. ... .. ... .. .. ... ... .. .. .12 SFA 20 . .. .. .. .. .12 LISCOMB RIVER . .. .. .. 12 ST. MARY'S RIVER . .. .. .. .13 ASSESSMENT RESULTS AND DISCUSSION . .. .. ... .. ... ... ... ... ... .. ... .. .. .. ... ... .. .. .. .. ... .. .. ... ... .. ... .13 SFA 20 . .. .. ..