If this traditional migration is hindered it could lead to a serious decline in fish reproduction which will unbalance the delicate food chain on which this ecosystem depends.

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We don't yet know which species will benefit, and which will suffer in response to the changes, but because each species plays a specific ecological role on the tundra, the downfall of one species or proliferation of another could have a domino effect that disrupts the tundra's delicate food web.

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That level of decline could wreak havoc on the delicate Antarctic food chain.

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"It's one of the best foods in the world for a couple of reasons, and I think it's because it has this very unique trait which is that it is on one side, extremely rich, but on the other, extremely delicate, " Ariane Daguin, the CEO and founder of D'Artagan, a gourmet food company that started 25 years ago supplying Americans with foie gras.

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Some restaurants, like the Ning Po Residents Association, require a nominal annual fee (around 200 Hong Kong dollars), but in return you gain access to excellent food (in this case, recipes from the city of Ningbo, near Shanghai, such as delicate, juicy soup dumplings and sweet-and-sour fish), in an exclusive but usually unpretentious setting.

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