Articles | Volume 6-osr9
https://doi.org/10.5194/sp-6-osr9-8-2025
https://doi.org/10.5194/sp-6-osr9-8-2025
30 Sep 2025
 | OSR9 | Chapter 3.1
 | 30 Sep 2025 | OSR9 | Chapter 3.1

Relationship between variations in sea bottom temperature and American lobster catch rate off southwestern Nova Scotia during 2008–2023

Adam M. Cook, Youyu Lu, Xianmin Hu, David Brickman, David Hebert, Chantelle Layton, and Gilles Garric

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Cited articles

Brickman, D., Hebert, D., and Wang, Z.: Mechanism for the recent ocean warming events on the Scotian Shelf of eastern Canada, Cont. Shelf Res., 156, 11–22, https://doi.org/10.1016/j.csr.2018.01.001, 2018. 
Cook, A. M., Hubley, P. B., Denton, C., and Howse, V.: 2018 Framework Assessment of American Lobster (Homarus americanus) in LFA 27–33. DFO Can. Sci. Advis. Sec. Res. Doc. 2020/017, vi + 251 pp., https://waves-vagues.dfo-mpo.gc.ca/library-bibliotheque/40946204.pdf (last access: 21 August 2024), 2020. 
Crossin, G. T., Al-Ayoub, S. H. Jury, S. H., Howell, W. H., and Watson, W. H.: Behavioral Thermoregulation in the American Lobster Homarus Americanus, J. Exp. Biol., 201, 365–374, https://doi.org/10.1242/jeb.201.3.365, 1998. 
DFO: Oceanographic Conditions in the Atlantic Zone in 2022, DFO Can. Sci. Advis. Sec. Sci. Advis. Rep. 2023/019, https://waves-vagues.dfo-mpo.gc.ca/library-bibliotheque/41188792.pdf (last access: 15 August 2024), 2023. 
Drévillon, M., Fernandez, E., and Lellouche, J. M.: EU Copernicus Marine Service Product User Manual for the Global Ocean Physics Reanalysis, GLOBAL_MULTIYEAR_PHY_001_030, Issue 1.5, Mercator Ocean International, https://catalogue.marine.copernicus.eu/documents/PUM/CMEMS-GLO-PUM-001-030.pdf (last access: 19 March 2024), 2023a. 
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Short summary
Ocean bottom temperatures from a global ocean reanalysis product are found to be consistent with in situ observations on the Scotian Shelf. Statistical analysis reveals a positive relationship between changes in lobster catch rate and ocean bottom temperature off the southwest coast of Nova Scotia during 2008–2023. A standardized lobster catch rate index with the influence of bottom temperature included is more consistent with available stock biomass compared to the index without such an influence.
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