this post was submitted on 08 May 2024
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[–] [email protected] 58 points 6 months ago (1 children)

no one can agree why

I think most people can agree it's a combination of pollution, overfishing and climate change. Probably just unclear which one of those factors in the most.

[–] [email protected] 42 points 6 months ago* (last edited 6 months ago) (4 children)

Crazy idea, but what about fishing-driven evolutionary pressure. If all the biggest fish are getting caught and killed, won't that give smaller fish an evolutionary advantage?

[–] [email protected] 7 points 6 months ago

Nailed it. Exactly the answer I read in an article way back when. Commented on it above.

Remove the big fish, only the smaller ones that came to maturity faster get to reproduce.

[–] [email protected] 1 points 6 months ago* (last edited 6 months ago) (2 children)

If all the biggest fish are getting caught and killed, won’t that give smaller fish an evolutionary advantage?

Fishing is a little bit different than that. It's the big fish who are able to avoid getting caught, which is how they get to live to be so big.

[–] [email protected] 1 points 6 months ago
[–] [email protected] 9 points 6 months ago

Maybe if we're talking line fishing, but I'm pretty sure most commercial fishing is done with trawling nets, where everything above a certain size is caught.

[–] [email protected] 21 points 6 months ago (1 children)

Very possible, but with all things happening it's pretty hard to be sure it's that and not fish growing less because they're being poisoned by microplastics.

[–] [email protected] 7 points 6 months ago (1 children)

For sure. That's probably just a +1 on to the factors you already listed.

[–] [email protected] 6 points 6 months ago

I would list that under overfishing

[–] [email protected] 2 points 6 months ago (1 children)

Given nature's survival of the fittest, you miiight be onto something.

[–] [email protected] 0 points 6 months ago

He's not. It's the big fish that avoid getting caught.