On the plus side they’re gonna have a bigger ocean!They're gonna need a colder ocean.
Unfortunately, short of a nuclear winter, they're not going to get it.
Perhaps humans weren't destroying their food supply back then.Haven't these mesothermic fish been around for much longer than the current ice age?
So what did these fish do 35 million years ago, when earth was much warmer and without ice caps?
Have these animals evolved to cope with the lower temperatures we currently have? Or were they restricted to the polar regions back then?
Edited for clarity
Adaptation is easier in response to millions of years of climate change compared to hundreds of years of unnatural acceleration.Haven't these mesothermic fish been around for much longer than the current ice age?
So what did these fish do 35 million years ago, when earth was much warmer and without ice caps?
Have these animals evolved to cope with the lower temperatures we currently have? Or were they restricted to the polar regions back then?
Edited for clarity
From the gist of the article it really does seem to be the two-pronged attack on their energy budget that is the real problem. 35 million years ago they were undisputed apex predator species. Warmer waters may have imposed limitations on them, but that was likely the only significant limitation they were dealing with - now they are also second fiddle to industrial humans in the competition for food.Perhaps humans weren't destroying their food supply back then.
Earthshark kind much anticipate Urban Labyrinths Ocean Expansion Pack.On the plus side they’re gonna have a bigger ocean!
If the climate were stable they’d be fine. The problem is the rapid changes, which means they are now evolved for warmer temperatures than they’re experiencing, and same with their food web. All of it needs to find a new equilibrium, on evolutionary timescales.Haven't these mesothermic fish been around for much longer than the current ice age?
So what did these fish do 35 million years ago, when earth was much warmer and without ice caps?
Have these animals evolved to cope with the lower temperatures we currently have? Or were they restricted to the polar regions back then?
Edited for clarity
They might not have been fine due to all the other stresses. Things like petrochemical based toxins, lack of food due to strip mining of fish stocks.If the climate were stable they’d be fine. The problem is the rapid changes, which means they are now evolved for warmer temperatures than they’re experiencing, and same with their food web. All of it needs to find a new equilibrium, on evolutionary timescales.
Add on top of that humans essentially mining ocean biomass rather than sustainably harvesting it, and they are under severe stress.
35 million years ago?They might not have been fine due to all the other stresses. Things like petrochemical based toxins, lack of food due to strip mining of fish stocks.
I did! Then I discovered that actually the problem is that great white humans are overeating.Am I the only one that glanced at the title and read "Great White Sharks are Overeating"?
Of course not!Am I the only one that glanced at the title and read "Great White Sharks are Overeating"?
It's not JUST the warming waters.Haven't these mesothermic fish been around for much longer than the current ice age?
So what did these fish do 35 million years ago, when earth was much warmer and without ice caps?
Have these animals evolved to cope with the lower temperatures we currently have? Or were they restricted to the polar regions back then?
Edited for clarity
They're gonna need a colder ocean.
Unfortunately, short of a nuclear winter, they're not going to get it.
Haven't these mesothermic fish been around for much longer than the current ice age?
So what did these fish do 35 million years ago, when earth was much warmer and without ice caps?
Have these animals evolved to cope with the lower temperatures we currently have? Or were they restricted to the polar regions back then?
If the climate were stable they’d be fine. The problem is the rapid changes, which means they are now evolved for warmer temperatures than they’re experiencing, and same with their food web. All of it needs to find a new equilibrium, on evolutionary timescales.
What I have trouble understanding is how they could not enjoy wildlife enough to at least want some nice things so they can go on photo safari or whatever, and knowing that even zoos don't really do the job of maintaining the world in a suitable condition so they should want to save the environment.Wait, is this why the ultra rich class keeps building bunkers and hideaways?
You're not going to tell me they knew they're dooming the planet and, instead of helping, they just created safe places for themselves.. right?
You beat me to it!oh phew... i misread and thought they were overeating.
User name checks outoh phew... i misread and thought they were overeating.
That'll be the American sharks...oh phew... i misread and thought they were overeating.
I remember seeing a news item about tuna being ‘fish farmed’ in large tanks. The tanks were huge, and had curved walls, and the rooms that the tanks were in were kept as quiet as possible. The reason was that when tuna were startled, then reacted with a sudden burst of energy and moved forward rapidly. A loud noise or accident could result in many of the tuna smashing themselves against the edge of the pool, and being injured or even dying. Perhaps something similar happens in the wild? (Although you mention deep muscle tissue, and I would have thought that blunt force injuries would have been nearer the surface)Doing fish dissections in the mid 2010s a lab teacher who worked with state fish & wildlife mentioned large tuna being caught and they had abnormally injured or necrotic deep muscle tissue causing premature loss of quality and lower valued carcasses and they didn't know why. I wonder if this has anything to do with it.
Oh, right, I flipped it accidentally.I think you mean "cooler", not warmer waters. Doubtless they can probably adjust to changing temps over time, but it takes time for them to reset their internal thermostat (generations, probably), and lack of foresight/greed aren't giving them anything like the time they've had in the past.
Did you even bother to read the article? Or do you just jump right to the comments whenever a headline mentions warming? The article says:They're gonna need a colder ocean.
Unfortunately, short of a nuclear winter, they're not going to get it.
I get the obsession with climate change, I really do, but far and away the most biodiversity loss now and throughout human history is from habitat destruction. Unlike with climate change, huge international agreements aren't needed to produce meaningful results. They would certainly help, especially for migratory animals, but governments can start protecting habitat on their own territory any time they wish.Declines of great white sightings in False Bay, Mossel Bay, and Gansbaai, however, are multifaceted. Though thermal relocation may be a contributor, their population decline is also linked to a history of overfishing, shark netting, and habitat destruction.
Indeed, though warming waters heighten mesotherms’ vulnerability worldwide, other manmade harms exert the most danger. “If we had to say what is the one thing that we need to urgently address for these animals, it’s the fishing problem,” said Payne. “The most acute, urgent crisis these animals face is from overfishing, and particularly now from bycatch.”