Sea Surface Temperature and Tuna Catch in the Eastern Pacific Ocean Under Climate Change

39 Pages Posted: 22 Sep 2020

See all articles by Hanny John Mediodia

Hanny John Mediodia

affiliation not provided to SSRN

Viktoria Kahui

University of Otago - School of Business - Department of Economics

Ilan Noy

Victoria University of Wellington

Date Written: 2020

Abstract

The increase in sea surface temperature (SST) is one of the primary consequences of climate change and has the potential to impact tuna fisheries. This paper theoretically models and then applies the production function approach to establish a positive but non-linear relationship between catch and SST using gridded data for yellowfin and skipjack tuna catch in the Eastern Pacific Ocean. We test different forms of relationship between SST and the carrying capacity of tuna fisheries. By considering area, species and fishing methods, we provide spatially and biologically relevant information for the management of tuna in response to warming oceans. The increase in yellowfin tuna catch is higher in the Northern Hemisphere compared to the Southern Hemisphere, while the reverse is true for skipjack tuna. We also find that there is a nonlinear (i.e. logarithmic and quadratic) relationship between the SST and the carrying capacity of tuna fisheries.

Keywords: production function, sea surface temperature, tuna

JEL Classification: Q22, Q54

Suggested Citation

Mediodia, Hanny John and Kahui, Viktoria and Noy, Ilan, Sea Surface Temperature and Tuna Catch in the Eastern Pacific Ocean Under Climate Change (2020). CESifo Working Paper No. 8533, Available at SSRN: https://ssrn.com/abstract=3689455

Hanny John Mediodia (Contact Author)

affiliation not provided to SSRN

No Address Available

Viktoria Kahui

University of Otago - School of Business - Department of Economics ( email )

PO Box 56
Dunedin
New Zealand

Ilan Noy

Victoria University of Wellington ( email )

P.O. Box 600
Wellington, 6140
New Zealand

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