Potential climate change impacts on Atlantic cod (Gadus morhua) off the northeastern USA

  • Michael FogartyEmail author
  • Lewis Incze
  • Katherine Hayhoe
  • David Mountain
  • James Manning
Original Article


We examined the potential impacts of future climate change on the distribution and production of Atlantic cod (Gadus morhua) on the northeastern USA’s continental shelf. We began by examining the response of cod to bottom water temperature changes observed over the past four decades using fishery-independent resource survey data. After accounting for the overall decline in cod during this period, we show that the probability of catching cod at specified locations decreased markedly with increasing bottom temperature. Our analysis of future changes in water temperature was based on output from three coupled atmosphere–ocean general circulation models under high and low CO2 emissions. An increase of <1.5°C is predicted for all sectors under the low emission scenario in spring and autumn by the end of this century. Under the high emission scenario, temperature increases range from ∼2°C in the north to >3.5°C in the Mid-Atlantic Bight. Under these conditions, cod appear vulnerable to a loss of thermal habitat on Georges Bank, with a substantial loss of thermal habitat farther south. We also examined temperature effects on cod recruitment and growth in one stock area, the Gulf of Maine, to explore potential implications for yield and resilience to fishing. Cod survival during the early life stages declined with increasing water temperatures, offsetting potential increases in growth with warmer temperatures and resulting in a predicted loss in yield and increased vulnerability to high fishing mortality rates. Substantial differential impacts under the low versus high emission scenarios are evident for cod off the northeastern USA.


Climate change impacts Gulf of Maine Cod Bottom water temperatures 



We thank Nick Wolff, Michelle Traver and Loretta O’Brien for data and analyses and Adrienne Adamek for GIS support. The support and encouragement of Erika Spanger-Siegfried, the Union of Concerned Scientists, and the Census of Marine Life are also gratefully acknowledged.


  1. Altieri AH, Witman JD (2006) Local extinction of a foundation species in a hypoxic estuary: integrating individuals to ecosystem. Ecology 87(3):717–730CrossRefGoogle Scholar
  2. Barnett TP, Pierce DW, AchutaRao KM et al (2005) Penetration of human-induced warming into the world’s oceans. Science 309:284–287CrossRefGoogle Scholar
  3. Behrenfeld MJ, O’Malley RT, Siegel DA et al (2006) Climate-driven trends in contemporary ocean productivity. Nature 444:752–755CrossRefGoogle Scholar
  4. Brander K (1995) Effect of temperature on growth of Atlantic cod (Gadus morhua L). ICES J Mar Sci 52:1–10CrossRefGoogle Scholar
  5. Brander K (2000) Effect of environmental variability on growth and recruitment of Atlantic cod (Gadus morhua L) using a comparative approach. Oceanologica Acta 23:485–496CrossRefGoogle Scholar
  6. Clark RA, Fox CJ, Viner D, Livermore M (2003) North Sea cod and climate change-modeling the effects of temperature on population dynamics. Global Change Biol 9:1669–1680CrossRefGoogle Scholar
  7. Dai A, Hu A, Meehl WM, Washington WM, Strand WG (2002) Atlantic thermohaline circulation in a coupled general circulation models: unforced variations versus forced changes. J Climate 18:3270–3293CrossRefGoogle Scholar
  8. Delworth TL, Broccoli AJ, Rosati A, Stouffer RJ, Balaja V, Beesley JA, Cooke WF, Dixon KW, Dunne J, Dunne KA, Durachta JW, Findell KL, Ginoux P, Gnanadesikan A, Gordon CT, Griffies SM, Gudgel R, Harrison MJ, Held IM, Hemler RS (2006) GFDLs CM2 global coupled climate models. Part 1 – Formulation and simulation characteristics. J Clim 19:643–674CrossRefGoogle Scholar
  9. Drinkwater KF (2005) The response of Atlantic cod (Gadus morhua) to future climate change. ICES J Mar Sci 62:1327–1337CrossRefGoogle Scholar
  10. Dutil J-D, Brander K (2003) Comparing productivity of North Atlantic cod (Gadus morhua) stocks and limits to growth production. Fish Oceanogr 12:502–512CrossRefGoogle Scholar
  11. Fogarty M, Incze L, Wahle R, Mountain D, Robinson A, Pershing A, Hayhoe K, Richards A, Manning J (2007) Potential climate change impacts on marine resources of the northeastern United States. Report to Union of Concerned ScientistsGoogle Scholar
  12. Glantz MH (1990) Does history have a future? Forecasting climate change effects on fisheries by analogy. Fisheries 15:39–44CrossRefGoogle Scholar
  13. Greene CH, Pershing AJ (2001) The response of Calanus finmarchicus populations to climate variability in the Northwest Atlantic: basin-scale forcing associated with the North Atlantic Oscillation (NAO). ICES J Mar Sci 57:1536–1544CrossRefGoogle Scholar
  14. Harvell CD, Mitchell CE, Ward JR et al (2002) Climate warming and disease risks for terrestrial and marine biota. Science 296(5576):2158–2162CrossRefGoogle Scholar
  15. Helmuth B, Harley CD, Halpin PM et al (2002) Climate change and latitudinal patterns of intertidal thermal stress. Science 298:1015–1017CrossRefGoogle Scholar
  16. Hoagland P, Jin D, Thunberg E, Steinback S (2005) Economic activity associated with the Northeast shelf large marine ecosystem: application of an input–output approach. In: Hennessy TM, Sutinen JG (eds) Large marine ecosystems, vol 13, pp 157–179Google Scholar
  17. Hosmer DW, Lemeshow S (2000) Applied logistic regression, 3rd edn. Wiley, New York, p 375Google Scholar
  18. IPCC (2001) Intergovernmental Panel on Climate Change: Climate change 2001: synthesis report. Summary for Policy Makers. Third Assessment ReportGoogle Scholar
  19. Kurlansky M (1997) Cod: a biography of the fish that changed the world. Walker, New York, p 294Google Scholar
  20. McKenzie RA (1934) Cod and water temperature. Biol Board Can Atlantic Progress Report 12:3–6Google Scholar
  21. McKenzie RA (1938) Cod take smaller bites in ice cold water. Fish Res Board Can Atlantic Progress Report 22:12–14Google Scholar
  22. Murawski SA (1993) Climate change and marine fish distributions: forecasting from historical analogy. Trans Am Fish Soc 122:667–658CrossRefGoogle Scholar
  23. Nakienovi N, Alcamo J, Davis G et al (2000) Special report on emissions scenarios: a special report of Working Group III of the Intergovernmental Panel on Climate Change. Cambridge Univ Press, Cambridge, UKGoogle Scholar
  24. Pershing AJ, Greene CH, Jossi JW et al (2005) Interdecadal variability in the Gulf of Maine zooplankton community with potential impacts on fish recruitment. ICES J Mar Sci 62:1511–1523CrossRefGoogle Scholar
  25. Planque B, Fredou T (1999) Temperature and the recruitment of Atlantic cod (Gadus morhua). Can J Fish Aquat Sci 56:2069–2077CrossRefGoogle Scholar
  26. Pope VD, Gallani ML, Rowntree PR, Stratton RA (2000) The impact of new physical parameterizations in the Hadley Centre climate model – HadCM3. Clim Dyn 16:123–146CrossRefGoogle Scholar
  27. Quinn TJ, Deriso R (1999) Quantitative fish dynamics. Academic, New YorkGoogle Scholar
  28. Ratz H-J, Lloret J (2003) Variation in fish condition between Atlantic cod (Gadus morhua) stocks, the effect on their productivity and management implications. Fish Res 60:369–380CrossRefGoogle Scholar
  29. Rose GA (2005) On distributional response of North Atlantic fish to climate change. ICES J Mar Sci 62:1360–1374CrossRefGoogle Scholar
  30. Sarmiento JL, Slater R, Barber R et al (2004) Response of ocean ecosystems to climate warming. Global Biogeochem Cycles 18:GB3003CrossRefGoogle Scholar
  31. Serchuk FM, Grosslein MD, Lough RG et al (1994) Fishery and environmental factors affecting trends and fluctuations in the Georges Bank and Gulf of Maine Atlantic cod stocks: an overview. ICES Mar Sci Symp 198:77–109Google Scholar
  32. Smith TD (2002) The Woods Hole bottom-trawl resource survey: development of fisheries-independent multispecies monitoring. ICES Mar Sci Symp 215:480–488Google Scholar
  33. Steinback S, Gentner B, Castle J (2004) The economic importance of marine angler expenditures in the United States. NOAA Prof. Pap NMFS 2 167 ppGoogle Scholar
  34. Stenseth NC, Mysterud A, Ottersen G et al (2002) Ecological effects of climate fluctuations. Science 297:1292–1296CrossRefGoogle Scholar
  35. Sutton RT, Hodson DLR (2005) Atlantic Ocean forcing of North American and European summer climate. Science 309:115–118CrossRefGoogle Scholar
  36. Washington WM, Weatherly JW, Meehl GA et al (2000) Parallel climate model (PCM) control and transient simulations. Clim Dyn 16:755–774CrossRefGoogle Scholar
  37. World Wildlife Fund (2005) Implications of a 2°C global temperature rise for Canada’s natural resourcesGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Michael Fogarty
    • 1
    Email author
  • Lewis Incze
    • 2
  • Katherine Hayhoe
    • 3
  • David Mountain
    • 1
  • James Manning
    • 1
  1. 1.National Oceanic and Atmospheric AdministrationWoods HoleUSA
  2. 2.University of Southern MainePortlandUSA
  3. 3.Department of GeosciencesTexas Tech UniversityLubbockUSA

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