'Fishing mortality' diaporamas de présentation

Challenges to detection of early warning signals of regime shifts

Challenges to detection of early warning signals of regime shifts. Alan Hastings Dept of Environmental Science and Policy UC Davis Acknowledge: US NSF Collaborators: Carl Boettiger , Derin Wysham , Julie Blackwood, Pete Mumby. Outline.

1.28k views • 114 slides

ICES advice for 2008

ICES advice for 2008. North Sea. Martin Pastoors (chair of the Advisory Committee on Fishery Management). short version. New timing for North Sea advice. EC requested for earlier advice for North Sea Allows more time for stakeholder inputs long-term strategies

787 views • 69 slides

553 views • 40 slides

Yield per recruit models

Yield per recruit models. Yield per recruit models. Objectives Since maximizing effort does not maximize catch, the question is if there is an optimum fishing rate that would lead to a maximum yield.

1.54k views • 39 slides

Sakari Kuikka University of Helsinki Maretarium, Kotka Content:

Use of decision analysis in the evaluation of scientific information. Sakari Kuikka University of Helsinki Maretarium, Kotka Content: Decision making in general and in fisheries Value-of-information Value-of-control Commitment: role of understandability. Main results of the talk.

462 views • 34 slides

Unusable Stock

Recruitment. Natural Deaths. Unusable Stock. Disease. Growth. Emigration Immigration. Recruitment. Natural Deaths. Usable Stock. Disease. Growth. Emigration Immigration. Yields. Dynamics of fish stock. Fishing mortality=F. Can be controlled?. R = Recruitment G = Growth

333 views • 26 slides

Training course in fish stock assessment and fisheries management

Training course in fish stock assessment and fisheries management. National Institute of Oceanography and Fisheries Fish Population Dynamics Lab 10-14 November, 2013 ns. Management plan and Reference points. Sustainability and overfishing. Recruitment overfishing

612 views • 23 slides

Reauthorization of the Magnuson-Stevens Fishery Conservation and Management Act

Reauthorization of the Magnuson-Stevens Fishery Conservation and Management Act Presentation for the Marine Fisheries Advisory Committee John H. Dunnigan Director, Office of Sustainable Fisheries January 12, 2005 Honolulu, Hawaii. Outline of Presentation. Where are we now?

403 views • 22 slides

Fisheries Reference Points (Single- and multi-species)

Fisheries Reference Points (Single- and multi-species). Fish 458, Lecture 23. (Fisheries) Reference Points. Quantities that provide guidelines for targets and limits on harvesting (are usually fishing mortality rates or biomasses). Traditional Reference Points ( B MSY / MSY ).

532 views • 21 slides

Fishery Assessment of Sardine Stock GSA01 (Northern Alboran)

313 views • 21 slides

Responsible Fisheries Workshop Athenaeum Club, London June 9 th 2008

Responsible Fisheries Workshop Athenaeum Club, London June 9 th 2008. Documentation of responsible fisheries: International developments and the Icelandic project for certification and labelling Dr. Kristján Thórarinsson Population Ecologist

288 views • 21 slides

Fishery Assessment of Sardine Stock GSA06 (Northern Spain)

324 views • 21 slides

Components of Z

Recruitment. Natural Mortality. Population Numbers. Components of Z. Fishing Mortality. Immigration. Emigration. Definitions. Instantaneous Models F = instantaneous fishing mortality M = instantaneous natural mortality Z = F + M. Definitions. Discrete (Type I) Fishery

412 views • 19 slides

NOAA Fisheries: 2004 - 2005

NOAA Fisheries: 2004 - 2005. NOAA Fisheries: 2004-2005. Mission Stewardship of living marine resources through science-based conservation and management and the promotion of healthy ecosystems. Dr. Bill Hogarth, Assistant Administrator.

187 views • 18 slides

Overfished B/Bmsy ? 0.5

Overfishing F/Fmsy ? 1. Overfished B/Bmsy ? 0.5. Overfished Declaration 2000. Rebuilding Plan 2003- no end date. Figure A1. Northeast Region barndoor skate has a controlled fishing mortality and biomass is rebuilding. B msy proxy is in kg/tow.

328 views • 18 slides

2. CRFM - Barbados Summary

2. CRFM - Barbados Summary. Multispecies. Predation. Predation. R. M. Z. r. F. G. Population dynamic models. Stock B. Environment. Fishing. Management. Climate. 2 kind of models: Individually based models Population models. Population growth.

276 views • 15 slides

EDOM EQUATIONS

EDOM EQUATIONS. Equilibrium delay-differential optimization model. Biomass and numbers. EACH PREDICTION IS A RATIO OF GAIN RATE TO LOSS RATE. Larval settlement. Recruitment. Where: a=KR o /L o b=(K-1)/L o and L o ?R o (w r +kw ? /M)/(M+k). Effort (fishing mortality) distribution.

175 views • 7 slides

Overfished MSST = B/Bmsy 0.86

Overfishing F/Fmsy ? 1. Overfished MSST = B/Bmsy 0.86. B/Bmsy = 0.14-0.17* for initial overfished declaration. Rebuilding Plan 1999-2018. Overfished Declaration. Figure D1. Highly Migratory Species bluefin tuna - North Atlantic fishing

174 views • 7 slides

Bay of Fundy scallops SPA 4

Case study. Bay of Fundy scallops SPA 4. Smith et al. 2005 Delay-difference model Data from 1983 to 2005 (23 years) Multiple data sequences Prediction under various future exploitation rates. Delay-difference model. It is assumed that weight-at-age follows the equation.

397 views • 6 slides

Bay of Fundy scallops SPA 4

Case study. Bay of Fundy scallops SPA 4. Smith et al. 2005 Delay-difference model Data from 1983 to 2005 (23 years) Multiple data sequences Prediction under various future exploitation rates. Delay-difference model. It is assumed that weight-at-age follows the equation.

173 views • 6 slides