History of Marine Animal Populations

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History of Marine Animal Populations. HMAP Executive Committee. Chair: Poul Holm Trinity Long Room Hub, Trinity College Dublin Andrew A. Rosenberg Institute for the Study of Earth, Oceans and Space and Department of Natural Resources, University of New Hampshire Brian R. MacKenzie - PowerPoint PPT Presentation

Text of History of Marine Animal Populations

  • HMAP Executive CommitteeChair: Poul HolmTrinity Long Room Hub, Trinity College DublinAndrew A. RosenbergInstitute for the Study of Earth, Oceans and Space and Department of Natural Resources, University of New HampshireBrian R. MacKenzieNational Institute for Aquatic Resources, Department of Marine Ecology and Aquaculture, Technical University of Denmark,Anne H. MarboeDepartment of Environmental, Social and Spatial Change, Roskilde University, DenmarkBo Poulsen Department of Environmental, Social and Spatial Change, Roskilde University, Denmark

  • Preliminary Synthesis Conclusions: Big conclusions Huge changes in marine life, regime shiftsHuman impact of ancient origin

    Few species have become extinct through overfishingBut many species have become commercially extinct, some marine ecosystems have been depleted beyond recovery

    Pristine nature is lost But we may hope to rebuild ecosystemsand historical baselines will inform us of potential

  • Preliminary Synthesis Conclusions: key patterns or trendsChanges are attributed to climatic and human forcesModelling and testing historical hypotheses are possibleHistorical patterns of resource exploitation are key to identifying what has actually been lost in the habitat An essential part of developing and implementing recovery plans for depleted marine ecosystems and ecosystem attributes

  • DistributionAtlantic and North Pacific right whalesText book assumptions on distribution and abundance have been correctedThe causes of failure of North Pacific right whale to recover numerically and spatially after severe depletion of the 1840s unknownNorth Atlantic range of TunaNorth Sea abundance revealedClimate or human exploitation?Global habitat changes2000 year trajectoriesDetailed studies of recoveries are needed

  • AbundanceNorthwest Atlantic: 1850s Cod Biomass Estimate on the Scotian Shelftotal removals 200,000 t per year1850s adult cod biomass estimate of 1.26 million t1990s annual biomass estimate of 50 000 t

    Baltic cod: extension of time-series to 16th C

  • AbundanceNorth Sea herring 1600-2000fishing power of North Sea herring fishing vessels from the 16th 20th century measured as cpue of hoeker-units stock abundance ten times higher in the 1600s than in the 1950sby the 1800s it had dropped to 5060% of the level of the 1600sBo Poulsen, submitted

  • AbundanceReturns in yearly catch and money value per unit of capital, Denmark 1895-2000

    Catch values relative to investments (V/C) declined steadily through 20th CFalling catch volumes relative to investments offset by industrial fisheries (fishmeal) by mid-20th C but stagnating / declining since 1980

    Holm 2007Technology gainsEconomic gains

    Diagram1

    3991.7541295.37910883.5921148.4759491.07795.5478766.2675392.6510

    3183.1015612.4148610.27451282.74416422.592107.9914731.583321.9643737.1455

    6996.152751052.39516483.0421887.27426888.8765808.978217.2185481.1044804.469

    8542.42752370.17311344.1911693.59719691.2791526.110510332.7841106.0293361.8025

    17711.9223354.7416747.3674434.41744565.6184572.04112961.854645.3123815.053

    15408400011369392016287125653316975610

    23035268018796257415000155565375497729

    31061499226766.86884620.757622789.9843447.7447761.5687306549

    22038775231582.95444502.578421950.5841637.8328238.39215265248

    27045.652825374.21236420.4322793.625612674.5442175.98413434.7361784.07210897

    46805.620816980.259244779.36563207.18430148.243664.84814078.97613325396

    50929.339250863.0463505.843169.4839785.1124458.99214928.872233923777

    159122.28111840.251422.8081850.04831711.3044407.89623428.98417228904

    333404.22492451.26461797.3282256.49629234.4163752.94431479.384816.7687222

    4797981465759102011993697666073033624586682

    931762713639533012053535859353900211896983

    128067514584516798011723853763186314912805187

    138752818724012546410222413310793972126871516

    11536801997991444695818464100107662656646533

    99392118234958043389925931068640106586385

    137571021071047016441172765010566096376496

    90654686165354921032869492013422550564903

    1134342929023552920002000200016951420002000

    Nordsen

    Skagerrak

    Kattegat

    Sundet

    Blthavet

    stersen(vestlige del)

    stersen(stlige del)

    Ringkbing og Nissum fjorde

    Limfjorden

    r

    Farvande i tons

    Fangster mngdevis fordelt efter farvande

    Diagram2

    17986033842815531433411506193390

    16745514614776515533411555503051

    29046164813809555066214084683078

    21275154724847492252016585182818

    22925404608738511462316225602722

    25775994863672513862715883102344

    26335734799701472759413608401619

    31876975368754493554313789861523

    33017665511648528155514767881210

    29717585233691389344912905841206

    37189415345677373841314345541272

    37389314923604302738414815491222

    3698998424942427393541439562994

    358913223808369271432514646751050

    3199.5155624864691725425.51297.519801980

    281017901164569736526113119851985

    25921695111450471249194319901990

    239813481119566123876086819951995

    Nordsen

    Skagerrak

    Kattegat

    Sundet

    Blthavet

    stersen(vestlige del)

    stersen(stlige del)

    Ringkbing og Nissum fjorde

    Limfjorden

    Antal fiskere fordelt efter farvande

    Diagram3

    15.82783176312.2117459095

    11.76304053582.1393981501

    5.2883321120.8337205008

    3.59108820371

    4.02033676611.1564788978

    0.44096892490.7768004701

    0.76873497550.8947984579

    4.09954626171.8115556998

    3.22386495270.7486948627

    6.03976457870.925665421

    4.34461176251.2580663405

    4.61008988180.8548851981

    6.30533150550.9113094358

    5.49121906420.729050115

    7.27712175210.894288281

    8.79247662310.7050061662

    8.76542199180.5181681557

    1980

    11.98185448890.8190963873

    8.93667926140.5890262614

    16.41417356990.6310865957

    11.6983529798

    Returns in total catch per unit of capital

    Returns in value per unit of capital

    Diagram4

    0.98452596341.26866822175.23236907131.36110520092.44708896821.54611111111.2496839072.3680027068

    0.64119058150.87478016514.71248857681.19500702953.52058565892.02346760071.58335213711.813318949

    1.02367936351.06118939350.69860518860.77926975850.76379055940.97850545760.66383050351.5391551585

    11111111

    2.14444444444.02535211270.81589643231.52137468570.96130141890.97664543520.91024930751.1103863522

    0.63398857533.00941176470.56466060181.21179537310.84248565680.61356565031.03294046540.8044563965

    1.47982928563.67201426020.55948553050.75562283740.83142609870.8833634720.73744818060.8795423957

    2.7126426126.42618741981.26200391961.28630460451.72407857432.02861815211.5269882661.5256410256

    1.22045380352.03347280330.46390345130.99397590360.63863569544.66666666670.67958030670.5843007186

    1.06235820324.41391721660.6046742420.99887450760.79310950960.77167019031.17595978060.6960885229

    1.74780535691.90146231720.66147281920.94928335171.11249219241.0626050421.86285714291.2527370137

    0.84146770182.91926345610.41796796150.81571194760.75682224870.8454600121.6085025980.9231852315

    1.30694601084.07379283490.38950764270.36158641730.63960286020.62108922361.11469282880.4456352023

    0.98746747421.00606327630.33636971360.30346149960.63064171340.57791181961.23754954070.3877864211

    1.33526710991.39047619050.46507062640.27079984690.53220736390.7213821071.01902577020.3189279036

    1.16204600070.34329590950.35829229970.20998326830.48809416660.61481221070.66615847540.315774577

    0.67229633340.33488837880.36740432410.17664468390.3777238940.46606509830.7841989210.2013154221

    19751975197519751975197519751975

    0.95827947240.53325281780.82011096010.22471232121.079943297519801.01734215391980

    0.61361331660.46953333340.54077708390.17889743220.596980850819850.82820142951985

    0.69056418960.44328936810.4655016680.24346340220.960732391319900.92555348241990

    19951995199519951995199519951995

    Nordsen

    Skagerrak

    Kattegat

    Sundet

    Blthavet

    stersen(vestlige del)

    stersen(stlige del)

    Limfjorden

    Vrdiudbytteefter fangstomrde

    tonsfangst

    Fangst, 1000 kg (+ beregnet sild og andre fisk)

    NordsenSkagerrakKattegatSundetBlthavetstersen(vestlige del)stersen(stlige del)Ringkbing og Nissum fjordeLimfjordenAndre farvandeDel af fangsten landet i britiske havneDel af fangsten landet i andre udenlandske havnetotal

    18880074631702195667460600000036376

    18900010535699694956964270000032784

    1895399212951088411489491968766393000036065

    1900318361286101283164231084732322373700039010

    190569961052164831887268898098217481480400067620

    191085422370113441694196911526103331106336200059968

    1915177123355167474434445664572129626453815000108808

    19201540840001136939201628712565331697561000063878

    19252303526801879625741500015556537549772903972078456

    193031061499226766.86884620.757622789.9843447.7447761.5687306549046200127134.9224

    193522038775231582.95444502.578421950.5841637.8328238.39215265248045780103296.5408

    194027045.652825374.21236420.4322793.625612674.5442175.98413434.7361784.07210897000144007.2584

    194546805.620816980.259244779.36563207.18430148.243664.84814078.976133253960185360166395.4936

    195050929.339250863.0463505.843169.4839785.1124458.99214928.872233923777789380530261639.6752

    1955159122.28111840.251422.8081850.04831711.3044407.89623428.9841722890407780358394409.52

    1960333404.22492451.26461797.3282256.49629234.4163752.94431479.384816.76872220800340562414.824

    1965479798146575910201199369766607303362458668202884841801651

    19709317627136395330120535358593539002118969837371129622061188864

    197512806