Production of Coho Salmon from the Unuk River, 1998–1999

Production of Coho Salmon from the Unuk River, 1998–1999

Fishery Data Series No. 01-10 Production of Coho Salmon from the Unuk River, 1998–1999 by Edgar L. Jones III Scott A. McPherson and Amy B. Holm July 2001 Alaska Department of Fish and Game Division of Sport Fish Symbols and Abbreviations The following symbols and abbreviations, and others approved for the Système International d'Unités (SI), are used in Division of Sport Fish Fishery Manuscripts, Fishery Data Series Reports, Fishery Management Reports, and Special Publications without definition. All others must be defined in the text at first mention, as well as in the titles or footnotes of tables and in figures or figure captions. Weights and measures (metric) General Mathematics, statistics, fisheries centimeter cm All commonly accepted e.g., Mr., Mrs., alternate hypothesis HA deciliter dL abbreviations. a.m., p.m., etc. base of natural logarithm e gram g All commonly accepted e.g., Dr., Ph.D., catch per unit effort CPUE hectare ha professional titles. R.N., etc. coefficient of variation CV kilogram kg And & common test statistics F, t, c2, etc. At @ kilometer km confidence interval C.I. liter L Compass directions: correlation coefficient R (multiple) meter m east E correlation coefficient r (simple) north N metric ton mt covariance cov milliliter ml south S degree (angular or ° millimeter mm west W temperature) Copyright ã degrees of freedom df Weights and measures (English) Corporate suffixes: divided by ÷ or / (in cubic feet per second ft 3/s Company Co. equations) foot ft Corporation Corp. equals = gallon gal Incorporated Inc. expected value E Inch in Limited Ltd. fork length FL mile mi et alii (and other people) et al. greater than > ounce oz et cetera (and so forth) etc. greater than or equal to ³ pound lb Exempli gratia (for e.g., harvest per unit effort HPUE quart qt example) less than < yard yd id est (that is) i.e., less than or equal to £ Spell out acre and ton. latitude or longitude lat. or long. logarithm (natural) ln monetary symbols (U.S.) $, ¢ logarithm (base 10) log Time and temperature months (tables and Jan,...,Dec logarithm (specify base) log2, etc. day d figures): first three mideye-to-fork MEF letters degrees Celsius °C minute (angular) ' number (before a # (e.g., #10) degrees Fahrenheit °F number) multiplied by x hour (spell out for 24-hour clock) h pounds (after a number) # (e.g., 10#) not significant NS minute min registered trademark â null hypothesis HO second s trademark ä percent % Spell out year, month, and week. United States (adjective) U.S. Probability P United States of USA Probability of a type I a Physics and chemistry America (noun) error (rejection of the null hypothesis when all atomic symbols U.S. state and District of use two-letter true) alternating current AC Columbia abbreviations abbreviations (e.g., AK, DC) probability of a type II b ampere A error (acceptance of calorie cal the null hypothesis direct current DC when false) hertz Hz second (angular) " horsepower hp standard deviation SD hydrogen ion activity pH standard error SE parts per million ppm standard length SL parts per thousand ppt, ‰ total length TL volts V variance Var watts W FISHERY DATA SERIES NO. 01-10 PRODUCTION OF COHO SALMON FROM THE UNUK RIVER, 1998–1999 by Edgar L. Jones III Division of Sport Fish, Douglas Scott A. McPherson Division of Sport Fish, Douglas and Amy B. Holm Division of Sport Fish, Ketchikan Alaska Department of Fish and Game Division of Sport Fish 333 Raspberry Rd. Anchorage, AK 99518-1599 July 2001 This investigation was partially financed by the Federal Aid in Sport Fish Restoration Act (16 U.S.C. 777- 777K) under Projects F-10-13 and F-10-15, Job No. S-1-8. The Fishery Data Series was established in 1987 for the publication of technically oriented results for a single project or group of closely related projects. Fishery Data Series reports are intended for fishery and other technical professionals. Fishery Data Series reports are available through the Alaska State Library and on the Internet: http://www.sf.adfg.state.ak.us/statewide/divreports/html/intersearch.cfm This publication has undergone editorial and peer review. Edgar L. Jones IIIa Alaska Department of Fish and Game, Division of Sport Fish Region I P.O. Box 240020, Douglas, AK 99824-0020, USA Scott A. McPherson Alaska Department of Fish and Game, Division of Sport Fish, Region I P. O. Box 240020, Douglas, AK 99824-0020, USA Amy B. Holm Alaska Department of Fish and Game, Division of Sport Fish, Region I 2030 Sea Level Drive, Suite 205, Ketchikan, AK 99901, USA a Author to whom all correspondence should be addressed: e-mail: [email protected] This document should be cited as: Jones, E. L III, McPherson, S. A. and A. B. Holm. 2001. Production of coho salmon from the Unuk River, 1998– 1999. Alaska Department of Fish and Game, Fishery Data Series No. 01-10 Anchorage. The Alaska Department of Fish and Game administers all programs and activities free from discrimination based on race, color, national origin, age, sex, religion, marital status, pregnancy, parenthood, or disability. The department administers all programs and activities in compliance with Title VI of the Civil Rights Act of 1964, Section 504 of the Rehabilitation Act of 1973, Title II of the Americans with Disabilities Act of 1990, the Age Discrimination Act of 1975, and Title IX of the Education Amendments of 1972. If you believe you have been discriminated against in any program, activity, or facility, or if you desire further information please write to ADF&G, P.O. Box 25526, Juneau, AK 99802-5526; U.S. Fish and Wildlife Service, 4040 N. Fairfax Drive, Suite 300 Webb, Arlington, VA 22203 or O.E.O., U.S. Department of the Interior, Washington DC 20240. For information on alternative formats for this and other department publications, please contact the department ADA Coordinator at (voice) 907-465-4120, (TDD) 907-465-3646, or (FAX) 907-465-2440. TABLE OF CONTENTS Page LIST OF TABLES ......................................................................................................................................................................... ii LIST OF FIGURES ....................................................................................................................................................................... ii LIST OF APPENDICES .............................................................................................................................................................. ii ABSTRACT .................................................................................................................................................................................... 1 INTRODUCTION.......................................................................................................................................................................... 1 METHODS .................................................................................................................................................................................... 4 Smolt capture, coded-wire tagging, and length-weight sampling ............................................................................ 4 Estimate of smolt abundance.......................................................................................................................................... 4 Radiotelemetry .................................................................................................................................................................. 5 Estimate of escapement ................................................................................................................................................... 5 Age, sex, and length composition..................................................................................................................................... 9 Estimate of harvest.............................................................................................................................................................. 9 Mean date of harvest........................................................................................................................................................... 9 Estimates of total run, exploitation, and marine survival.......................................................................................... 10 RESULTS ...................................................................................................................................................................................... 10 Smolt capture, coded-wire tagging, and sampling...................................................................................................... 10 Estimate of smolt abundance.......................................................................................................................................... 11 Radiotelemetry .................................................................................................................................................................. 12 Estimate of escapement ................................................................................................................................................... 12 Estimates of age, sex, and length composition............................................................................................................ 16 Estimates of harvest, mean date of harvest, total run, exploitation rate, and marine survival............................ 17 DISCUSSION ..............................................................................................................................................................................

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