Fraser River Sockeye Fisheries and Fisheries Management - Cohen ...

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Total rows from all these tables because I cannot see how one could make a decent attempt ataveraging qualitative indices across such diverse fisheries.LGL Response: The “Total” row reflects the quality of the estimates for the majorcomponents of the catch or the average of the quality rating for the different catchestimates. We agree that it is difficult to average qualitative indices across diversefisheries, but these averages are useful for summarizing our findings. The addition of the“Total” row with average ratings does not detract from the other details provided in thereport, so they have not been removed.Personal communications typically require more information than what is presented in the report(e.g., (Ionson, pers. comm.) ).LGL Response: This was the only pers. comm. reference that did not have the individual’sfull name and affiliation. It will be expanded to “(Bert Ionson, retired DFO AboriginalFisheries Program Manager, Vancouver, BC, pers. comm.)”.List of typos and editorial comments:P32L13: "follow" needs and "ing" Response: Corrected.P34L1: The company is "…Marine Research…" Response: Corrected.Table 15: insert "commercial" before "allocations" Response: Corrected.Table 15: the table entries needs to be better explained in the caption. Response: Corrected.Table 16: It would be interesting to show the % recreational of Fraser River fisheries.Response: These %s are provided in the Table.P45-50: Much of this section on Non-Retention Fisheries seems like academic review andchatter that could have been condensed and focused on a couple of main points. Response: Wewere asked to describe and summarize the consequences of non-retention fisheries onsockeye physiology, survival and abundance. There is a fair amount of literature onsockeye physiology but few direct measures of the consequences fish capture and release onsockeye survival. Most of this section focuses on the results of a few recent studies thathave provided some direct estimates survival for sockeye caught and released by anglers,beach seines, fishwheel and tangle nets.P53L18: insert "female" before "parents" Response: Corrected.P53L19: substitute "from the ocean" in place of "to spawn" Response: Corrected.P55L11-13: reword Response: Corrected.P55L16: insert "middle" before "50" Response: No, positive and negative confidence limitsare not symmetrical, so 50 is not in the middle.P55L15-24: the text and figure captions explain the 25-75% interval differently, which made meM-36
flip back and forth here. Response: Text has been edited to be consistent with captions.P56-57: Figures 5-8 seem to show the same statistics, but the figure titles differ: some have"Precision" in the title and others have "Accuracy". The captions should also be re-worded toaccurately describe the contents of the figure as well as providing an indications as to whichyears were Good, Fair, etc. Response: Text has been added, figure titles have beencorrected. Finally, these figures are all cited out of order in the text. Figures 9-10 are cited first.Response: Corrected.Figures: none of the color-schemes can be used when printed in black-and-white. Response:We have kept the number of color figures to a minimum and adjusted several of the colorfigures so they can be interpreted if printed in black and white.P68L1-24: needs to be explained more clearly and consistently with Figure 11. The text says thatestimates are biased low, but the figure shows errors that are positive. I can see that it is correct,but one needs to jump through some mental hoops to get on with interpreting the results shownin the figures. Response: Corrected.P73L12: delete one of the "in September"s. Response: Corrected.P74L19: replace "bean" with "beam" Response: Definitely.P75L17: "throughout"? Response: Corrected.P78L1: does "exceeded by a considerable margin" mean that precision was < 25%? Response:Clarified.P79L38: insert "wide" after "m" Response: Corrected.P82L31-32: Is this statement correct, or do I misunderstand it? Capping the exploitation ratemeans that there is no upper bound to escapement. Response: Corrected.Table 24: change "run size" to recruitment and "log" to "logarithm". Response: This table wasextracted from a DFO report so the headings were not changed.Table 25: indicate the units (1,000s of fish). Response: Corrected.Figure 21: the caption should re-state that enroute losses were not estimated prior to 1992.Response: Corrected.P100L3: why has "Sockeye" suddenly become capitalized everywhere? Response: Corrected.P100L28-29: I would delete "with certainty" here, unless one knows the long-term gains, but isjust uncertain. Response: Corrected.P101L11-12: I think that Bradford is just being honest, not pessimistic. Response: edited.P103L25: This short section on Recovery Objectives should appear at the beginning of thissection on P100. It would have provided some important context for the section. Response:edited.M-37
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Fraser River Sockeye Fisheriesand F
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EXECUTIVE SUMMARY1. Catch Monitorin
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implement harvest rate ceilings to
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Table of ContentsEXECUTIVE SUMMARY
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List of TablesTable 1 Annual estima
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List of FiguresFigure 1 Fraser sock
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Figure 21 Estimates of total catch,
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List of AppendicesAppendix A Statem
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used to (1) estimate catch for each
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FISHERIES HARVESTINGOverview of Fis
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Figure 1 Fraser sockeye marine migr
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Table 2 Summary of available inform
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Table 3 provides the annual estimat
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Table 4 Summary of available inform
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season update teleconference meetin
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Catch Estimation MethodsThe procedu
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catch estimates was detected using
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of precision. The overall rating fo
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1998-00 - No agreements with Sto:lo
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initiation of the AFS Agreements in
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Table 12 Comparison of annual socke
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Table 13 Annual estimates of the ha
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Canadian Commercial FisheriesThe pr
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logbook systems. In addition to the
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Table 15 Fraser River sockeye salmo
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Available catch estimates for the r
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Table 17 Summary of available infor
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anged from less than 100 to over 30
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Washington State Recreational Fishe
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equirements have been applied to se
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salmon were biopsied or tagged with
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Stellako-Late Stuart and 531 Adams)
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FISHERIES MANAGEMENTOverview of Pre
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parents of the recruits). Effective
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within the confidence limits. For e
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Ratio of Return to Forecast5.04.03.
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Ratio of Return to Forecast5.04.03.
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Table 20 Pre-season forecast models
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different from the straight line),
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Prediction ability of ForecastsProp
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Stock MAPEReturn Explainedby Foreca
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test fisheries are analyzed in-seas
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Inputs to the cumulative-normal mod
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eginning of the runs, but by mid-ru
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Median Absolute Percent Error (1997
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variety of hydroacoustic techniques
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enefited from improved technologies
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Post-season estimates of Escapement
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precision achieved was considerably
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m 3 /sec during the sockeye run. Fi
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Escapement TargetsOur evaluations r
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20% of the average of the 4-year se
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Table 24 Low escapement benchmarks
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Table 25 Comparison of post-season
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fisheries have been permitted to ta
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sub-dominant cycle years (e.g., 200
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SummaryLow Escapement Benchmarks (L
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Extent of OverharvestingThe estimat
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2,000,0001,800,000Early StuartCatch
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Cultus Lake Sockeye Recovery Effort
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Figure 23 Number of adult sockeye e
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Recovery ObjectivesIn anticipation
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2008 the escapement estimate was 34
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BRISTOL BAY, ALASKA SOCKEYE FISHERY
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accurate, precise, and timely, (2)
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The Bay is subjected to large tidal
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activity (Bocking and Peterman 1988
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% of total run45%40%35%30%25%20%15%
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Harvest estimation methodsTotal har
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Millions of sockeyeYearFigure 27 Hi
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management structure complements th
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1.5Togiak4.03.5NushagakMillions of
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Millions of sockeye7.06.05.04.03.02
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logical given the dynamics of the r
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1.61.4Number of fish (millions)1.21
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Pre-season forecastsAs noted above,
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8.0y = 0.79x + 1.59R² = 0.417.8Log
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12010080MAPE60402001971-1980 1981-1
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Median percent error (MPE)3020100-1
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Table 28 Average age composition of
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dampeners to reduce surface turbule
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current year’s run is accounted f
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and 1999 Revised Annexes. This inte
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Bristol Bay was in 1997 when there
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upon by managers to determine when
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STATE OF THE SCIENCECatch Monitorin
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2006) due to concerns regarding the
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RECOMMENDATIONS1. DFO needs to ensu
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LITERATURE CITEDAdkison, M.D. and R
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Beacham, T.D., M. Lapointe, J.R. Ca
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CSAS. 2007 Pre-season run size fore
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Evans, D.G., J.B. Browning and B.G.
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Hardie, D.C., D.A. Nagtegaal, K. He
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Pacific Salmon Commission. 1998. Re
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Robichaud, D., J.J. Smith, K. K. En
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Valderrama, D. and J.L. Anderson. 2
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Appendix A Statement of Work.Cohen
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All sectors3.7 The Contractor will
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“State of the Science”. Comment
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3.3 The Contractor will review and
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Appendix BList of requests to DFO b
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DFO Request 15: Recent CSAS documen
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Item Description DateRequestedReque
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Appendix CFirst Nation catch monito
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Table C-1 Summary of information re
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Table C-2 Weekly catch monitoring e
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Table D-1 Summary of information re
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community of Port Renfrew. The area
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IPrecision ( + % of the estimate)10
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Table E-2 Annual Strait of Georgia
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Table E-4 Annual Johnstone Strait e
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Table E-6 Lower Fraser River recrea
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0 would mean that the forecast does
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the general ups and downs of the ob
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Appendix G Graphical representation
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Early Stuart Timing GroupEarly Stua
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Summer-run Timing GroupSummer run7.
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Fraser River Indicator Stocks (list
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Appendix H Pre-season forecast: sum
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ManagementGroup(IndicatorStock)MAPE
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ManagementGroup(IndicatorStock)MAPE
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Appendix I Methods of In-season Sto
Page 262 and 263: Marine Gillnet Test FisheriesThe gi
Page 264 and 265: Expansion line (x1000)9080706050403
Page 266 and 267: Table I-2 Mean values for purse sei
Page 268 and 269: Figure I-5 Map of test fishing loca
Page 270 and 271: Appendix J The Hydroacoustics progr
Page 272 and 273: An SEF project was secured in 2007
Page 274 and 275: Conservation action Comments Partne
Page 276 and 277: Table K-2 Summary of actions to rec
Page 278 and 279: Table L-1 Catch and escapement of s
Page 280 and 281: Table L-3 Performance criteria of p
Page 282 and 283: Ratio of annual return to the avera
Page 284 and 285: Appendix M Reviewer comments on the
Page 286 and 287: Request #5: Sockeye allocations by
Page 288 and 289: utility of pre-season forecasts. Pr
Page 290 and 291: 3. Are there additional quantitativ
Page 292 and 293: made via tagging and experimentatio
Page 294 and 295: Page 60: The authors make extensive
Page 296 and 297: ensure the reader does not assume t
Page 298 and 299: The reported excerpts from Bradford
Page 300 and 301: (budgets, legal issues, pseudo-cons
Page 302 and 303: REVIEW 3/3Reviewer Name: Dr Sean Co
Page 304 and 305: season forecasts that eventually co
Page 306 and 307: allocation shows "No agreement", an
Page 308 and 309: size.Figures showing errors for pre
Page 310 and 311: Goals can easily generate confusion
Page 314 and 315: Exploitation Rate100%90%80%70%60%50
Page 316 and 317: Exploitation RateEarly Stuart90%80%
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