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Tuna species popular in sashimi and poke bowls in sharp decline

phys.org

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Re: Tuna species popular in sashimi and poke bowls in sharp decline

#111

Post by AndrewKemendo »

thfuran wrote: post #26
rolobio wrote: post #12

I watched a documentary years ago about jellyfish invading Japan. Basically, the jellyfish population was exploding because the fish didn't exist to eat the baby jellyfish and keep them under control. The Japanese fishermen were furious that they kept catching jellyfish, rather than the fish that they wanted. They were the cause of their own suffering. Sounds like things haven't changed... I hesitate to think that Ja…

They could start eating jellyfish to pick up the slack.

Unfortunately not

They are not even remotely substitutes nutritionally

Re: Tuna species popular in sashimi and poke bowls in sharp decline

#112

Post by morkalork »

alecthomas wrote: post #75
morkalork wrote: post #56

Earlier quoted context omitted.

Probably a dumb question but why hasn't cod rebound on the east coast? The fishing moratorium has been in place for decades now, shouldn't the population have increased exponentially since then?

This paper [1] (PDF) indicates it is likely a complex interaction between multiple parts of the ecosystem. One example is that large cod are apex predators, competing with seals and when those cod were removed, seal populations increased, and predation on small cod increased correspondingly. [1] https://oceansfirstjournal.files.wordpress.com/2016/08/ocean...

Thanks, that was surprisingly interesting. It also talks about capelin the sibling comment mentioned.

Re: Tuna species popular in sashimi and poke bowls in sharp decline

#113

Post by xutopia »

thfuran wrote: post #27
0xbadcafebee wrote: post #13

https://en.wikipedia.org/wiki/Passenger_pigeon Passenger pigeons were hunted by Native Americans, but hunting intensified after the arrival of Europeans, particularly in the 19th century. Pigeon meat was commercialized as cheap food, resulting in hunting on a massive scale for many decades. There were several other factors contributing to the decline and subsequent extinction of the species, including shrinking of th…

Maybe. Cod suddenly collapsed by like 98% but never went extinct.

Cod benefited by a moratorium on fishing in the areas with the most stock (eastern Canada). Without it there would have been a complete disappearing of cod.

Re: Tuna species popular in sashimi and poke bowls in sharp decline

#114

Post by tw04 »

MichaelZuo wrote: post #97
tw04 wrote: post #78

Earlier quoted context omitted.

Citation? Because as best I can tell Japan has been doing what they can to prevent fish obtained by illegal means from hitting their market. https://www.seafoodsource.com/news/supply-trade/japanese-leg...

How could Japan be having its jellyfish problem, stemming from overfishing allegedly, if the rules were actually enforced?

There's a very, very big difference between "we're exhausting the fish supplies off our coastal waters" and "we have an entire dark fleet we send to South America to pillage their waters because they can't defend themselves".

The question wasn't about whether Japan is appropriately managing their fish stocks, the question was whether or not they had massive illegal fleets gutting the ocean around the world (which China is currently doing).

Re: Tuna species popular in sashimi and poke bowls in sharp decline

#115

Post by butlike »

racl101 wrote: post #80

Heh, poke bowls are already $20 where I live. Maybe we should make them $30 or $40 and save the fish.

You get a punch card. 5 per year. Every time you eat a tuna dish, youy get a punch.

Oversimplifying the problem for a punch line, since there's only a few viable solutions, as I see it now.

Re: Tuna species popular in sashimi and poke bowls in sharp decline

#117

Post by yongjik »

rolobio wrote: post #12

I watched a documentary years ago about jellyfish invading Japan. Basically, the jellyfish population was exploding because the fish didn't exist to eat the baby jellyfish and keep them under control. The Japanese fishermen were furious that they kept catching jellyfish, rather than the fish that they wanted. They were the cause of their own suffering. Sounds like things haven't changed... I hesitate to think that Ja…

> If they stopped over-fishing, that would just attract Chinese fishermen who would fill the gaps.

Maybe that's true, but isn't this the exact same argument used by Americans: "Why should I stop driving my SUV, when China will burn that gas anyway?"

Re: Tuna species popular in sashimi and poke bowls in sharp decline

#118

Post by AndrewKemendo »

Tuna are Megafauna

Humans deterministically deplete ingenious populations of megafauna to extinction

The counter to this to date was megafauna herding via property boundary permanence. aka fencing for cattle

So the only solution would be to figure out how to do ocean megafauna herding because reducing consumption is unlikely. Which would require massive scale 3 or 4 dimensional fencing.

Sounds like a technical problem that can be solved if extremely difficult

Also the externalities would be bonkers most likely

Edit: Looks like this is starting to happen for tuna as of last year https://www.sojitz.com/caravan/en/special/tuna/1.html

Re: Tuna species popular in sashimi and poke bowls in sharp decline

#119

Post by [deleted] »

tastyfreeze wrote: post #63
tw04 wrote: post #37

Earlier quoted context omitted.

>That is something that can be done at a local level without global cooperation. You're assuming some foreign operator won't come to your local waters to illegally fish. China has shown they will fish literally anywhere they can get away with it. https://www.nytimes.com/interactive/2022/09/26/world/asia/ch...

That is what a military is for...

[deleted]
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