Why has Japan been banned from Antarctic Whaling?

[Confused Ape]

I’d set sustainable quotas on Australians international waters too, but people would get emotional about that…

WWA - Bluefin Tuna

There are three species of bluefin: Atlantic (the largest and most endangered), Pacific, and Southern. Most catches of the Atlantic bluefin tuna are taken from the Mediterranean Sea, which is the most important bluefin tuna fishery in the world.

Lack of knowledge about the biology and migratory behavior of Atlantic bluefin has hindered successful fishery management plans.

PIRATE FISHING
Illegal fishing of Atlantic bluefin is a big problem and the fishery has been plagued by lack of enforcement and control.

and

Bluefin tuna populations have declined severely from overfishing and illegal fishing over the past few decades –not just Atlantic bluefin tuna, but also Pacific bluefin tuna and Southern bluefin tuna. Population declines have been largely driven by the demand for this fish in high end sushi markets.

So, what is a sustainable quota for an endangered species under these circumstances?