The effects of global warming will be seen in the short term at the scale of the most common species. tuna and swordfish, which will be significantly reduced. AZTI technology center based in the Basque Country, In all predicted climate scenarios, tuna stocks by 2050 Average 36% reduction in productivity and 15% reduction in sizeDue to the impact of climate change, the demand, price and benefits of this fishery will also be affected.
This work, combined impact of climate change and fisheries pressure may affect the productivity and size of major commercial tuna and swordfish species in the future. A team of professionals in research and modeling from Europe and Canada participated in the research, published in the prestigious journal. Global Planetary Change.
“We wanted to know how climate change and fisheries pressure will impact some of the most commercially important species in order to make decisions that secure the future of resources,” said Maite Erauskin-Extramiana, AZTI researcher and coordinator of the study.
Work, climate change and fishing pressure will affect the future productivity of major commercial tuna species and swordfish. The analyzed populations are expected to reduce their overall potential productivity by an average of 36% by 2050.
The results show that high trophic species will be more affected by fisheries pressure from climate change if they stay close to Maximum Sustainable Yield levels or current fishing pressure. “Only Pacific bluefin tuna show slight increase in future. “Five species, Atlantic and southern bluefin tuna, swordfish, lark, and albacore are estimated to have declined at different rates in biomass and size,” Erauskin-Extramiana said.
This will affect the price and demand of the species.
Regarding size, the model is a 15% global decline by 2050 due to climate change. However, there are also stocks, such as yellowfin and Pacific fisherman, where, on the contrary, a slight increase in size is expected. Azti added it The price and demand for fish depends in part on the size of the fish. and therefore, climate change and fishing could potentially reduce the income of the fishing industry, even for the catch of stocks whose productivity is predicted to increase.
“The fishing industry must take measures to adapt to climate change. increasing the value of fish through sustainability certifications and reducing fuel consumption and time spent at sea through greater use of digitalisation. This Reducing fuel consumption can also be considered a climate change mitigation measure, because tuna fishing accounts for 5% of the total fuel used in the world’s fisheries and reduces CO2 emissions”, concluded Erauskin-Extramiana.
Reference work: https://www.azti.es/la-productividad-y-el-tamano-de-las-especies-de-atun-disminuiran-due-to-cambio-climatico/
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