It is revealed that yellowfin tuna in the Indian Ocean has decreased by 70% in the past 70 years
by
Tuna is essential for dishes such as sushi, sashimi, and poke . Yellowfin tuna, which has a lower fat content than bluefin tuna and southern bluefin tuna, is an edible fish that is consumed not only in Japan but all over the world, but in recent years, research has announced that yellowfin tuna in the Indian Ocean has been drastically decreasing.
Multiple lines of evidence highlight the dire straits of yellowfin tuna in the Indian Ocean. - ScienceDirect
https://www.sciencedirect.com/science/article/pii/S0964569123004271
Tuna species popular in sashimi and poke bowls in sharp decline in the Indian Ocean
https://phys.org/news/2024-01-tuna-species-popular-sashimi-bowls.html
There are four populations of yellowfin tuna: the Eastern Pacific, Western Pacific, Atlantic, and Indian Oceans, which are managed by the Regional Fisheries Management Organization (RFMO) for Bonito and Tuna. Heydrich and his team used the RFMO time series and biomass assessment results to estimate annual fluctuations from 1950 to 2020.
by
The research team also applied the ``CMSY++ approach,'' which evaluates the status of fish stocks based on the amount of fish caught. Additionally, 955 records of yellowfin mauna were obtained from fisheries-independent sampling using the Baited Remote Underwater Video System (BRUVS), which records biological and ecological data such as species size and abundance. I analyzed it.
As a result, RFMO data revealed that the population of yellowfin tuna has decreased by 70% over the 70 years from 1950 to 2020. Data from BRUVS also revealed that since 2014, the population of yellowfin tuna in the Indian Ocean has been at its lowest.
by
The CMSY++ approach found that over the past 10 years, yellowfin tuna catch rates in the eastern Pacific, western Pacific, and Atlantic Oceans have slightly exceeded limits based on maximum sustainable production, but they are not overfished. Meanwhile, it has become clear that overfishing of yellowfin tuna continues to occur in the Indian Ocean.
'Recent years have shown that global yellowfin tuna populations have continued to decline, although management interventions have stabilized them in the Western Pacific,' said Christina Heidrich, a marine researcher at the University of Western Australia and lead author of the paper. Populations are declining around the world.'
'Yellowfin tuna contribute more than $16 billion annually to the global economy, and they also contribute significantly to the functioning of marine ecosystems,' said Daniel Polley, co-author of the paper and principal investigator at the University of British Columbia. is an apex predator that plays a critical role in fisheries, productivity, and overall health.The risk of population collapse is high if current management is not applied.Reducing overall fishing capacity and overfishing 'Strict management limits need to be placed on yellowfin tuna fishing to rebuild populations and avoid collateral damage to other species, such as sharks.'
Heydrich asserts, ``In order to halt the dramatic decline of yellowfin tuna in the Indian Ocean, it is urgently necessary to reduce the catch by 30% from 2020 levels.''
Related Posts:
