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400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

bbc.com

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Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#91

Post by frutiger »

dredmorbius wrote: post #81
frutiger wrote: post #60

Earlier quoted context omitted.

> removed a significant percentage of its inhabitants I was actually curious if anyone could help answer the following: (a) how one would define inhabitant (including bacteria?) (b) what the net %age change actually would be given a suitable choice of (a)

Most studies tend to look at biomass, either on a single-species or multi-species basis. Humans have displaced over 90% of all terrestrial vertebrate biomass (land animals with a backbone). http://peakoilbarrel.com/wp-content/uploads/2016/01/Terrestr... Most of the human + livestock biomass is utterly dependent on Haber-Bosch process derived nitrogen fertiliser, produced via nonrenewable natural gas (methane, a fossi…

What does displaced mean? Why are terrestrial vertebrates preferred in this analysis? Why is the horizontal scale in that chart nonlinear? What is peakoilbarrel.com?

The goalposts seem to have shifted from the person I replied to.

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#92

Post by CryptoPunk »

dnhz wrote: post #61
grawprog wrote: post #11

Earlier quoted context omitted.

Heartrate has been found to play a big part. https://pubmed.ncbi.nlm.nih.gov/9316546/ Animals with slower heart rates tend to be longer lived. An interesting sidenote are bats, which have heart rates about the same as similarly sized small mammals like mice, but due to their nightly torpor state where their heart rate is significantly lowered, they tend to live 20-25 years opposed to the 3-4 mice usually live.

Birds are metabolically much more active than mammals yet many have long lifespans. This prompted another finding that the number of cortical neurons can explain a large part of the variation in lifespan across species. https://www.labroots.com/trending/cell-and-molecular-biology...

Flight gives birds greater protection from predation, which makes evolution towards biologies that pay a higher metabolic cost for greater longevity more advantageous. The same thing applies to larger animals, like cows, which tend to have longer lifespans once you normalize for heart/metabolic rate.

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#93

Post by [deleted] »

practicalpants wrote: post #87
aloer wrote: post #42

Earlier quoted context omitted.

Related: there’s a new documentary on Netflix called Seaspiracy It has some staggering numbers regarding the amount of by-catch caught every day

I already know it doesn't bring up China's global fishing flotillas, who overfished China so roam the world stripping other coastlines, even protected areas like the Galapagos. One of the top reason for overfishing today. Or does it talk about this?

[deleted]

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#94

Post by raducu »

rubicon33 wrote: post #80
raducu wrote: post #23

Earlier quoted context omitted.

Welp... guess I'll die young. My heart rate when sleeping is 65bpm, and I can't focus on anuthing if my heart rate is below 90bpm during the day.

For what it's worth - I'm a firm believer that what is always healthy for your body, is not always healthy for your mind. Some of the most productive people I know eat nothing but donuts and coffee, and don't exercise at all. They're smart, driven, and highly successful. Meanwhile, I know a lot of people who put exercise and food as a priority, and don't seem nearly as sharp or as successful. Maybe this all washes ou…

I did see a cardiologist after COVID-19, he did prescribe some medicine to "calm my heart down a bit", I don't meet actual criteria for tachycardia and he agree in the end that I can postpone medicine if I start any aerobic exercise -- which I still didn't, except for VR games, which can be really intense, but alas, I don't have the time for or discipline.

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#95

Post by LordDragonfang »

Zenst wrote: post #69
IgorPartola wrote: post #50

Earlier quoted context omitted.

I saw the preview for this last night and on the one hand I want to watch it because I feel that it’s important to know this stuff, but on the other hand I really just want to bury my head in the sand. Over the past year I’ve realized just how much we are killing the planet and how powerless I am so do anything at all about it and it’s depressing me every time I think about it and not in a figurative sense.

You are not powerless - ethical buying, if everybody did that then things would change as companies run on money, so vote with your wallet. Effort to research and may find in some area's it's down to picking the best of a bad choice, but little by little mindsets are changing and you do have the power. Business runs on money - vote with your wallet as that is your power, use it, don't loose it.

>vote with your wallet as that is your power, use it, don't loose it.

When you tell people to "vote with your wallet", you are implicitly admitting that people with bigger wallets have more votes. Literally millions of times more, in many cases.

Don't vote with your wallet. involve yourself in local government, because legislation is the only way to solve problems like this.

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#96

Post by pvaldes »

1over137 wrote: post #72
IgorPartola wrote: post #50

Earlier quoted context omitted.

I saw the preview for this last night and on the one hand I want to watch it because I feel that it’s important to know this stuff, but on the other hand I really just want to bury my head in the sand. Over the past year I’ve realized just how much we are killing the planet and how powerless I am so do anything at all about it and it’s depressing me every time I think about it and not in a figurative sense.

>how powerless I am so do anything at all about it Don't eat seafood. The more that don't, the less fishing humanity will do.

> Don't eat seafood

Advice that tor several millions of people in this planet, will translate directly to "live less, die younger" or "starve your family to death, is good for your karma" (and your suicide will be highly appreciated for my own family).

Lets get serious, please. Stopping to eat seafood overnight would mean having a mass genocide in the planet in less than a year. Moreover, all cultures having many very long-lived people eat lots of seafood products. Is among the best human food known in the planet. This advice is totally out of any sensible discussion about our future.

Changing the subject, I have previously explained here how difficult and error prone is to study age in sharks, and my opinion has not changed a millimeter. I still would suggest to take this 400-yo values with a ton of arctic salt.

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#97

Post by pvaldes »

mannerheim wrote: post #18

The Icelandic dish of hákarl (fermented shark) is often made using Greenland shark.

I can't stand the ammonia flavor of Chondrichthyes, plus the bioaccumulation of heavy metals, mercury, ciguatoxins, the toxic amounts of vitamin A in liver...

There are many excellent seafood but this is dog-food grade at best, not decent food for humans unless you haven't anything else. Cooking with urine would be healthier providing the same flavor without the extra-poisons. Pretty disgusting stuff.

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#99

Post by throw14082020 »

LordDragonfang wrote: post #95
Zenst wrote: post #69

Earlier quoted context omitted.

You are not powerless - ethical buying, if everybody did that then things would change as companies run on money, so vote with your wallet. Effort to research and may find in some area's it's down to picking the best of a bad choice, but little by little mindsets are changing and you do have the power. Business runs on money - vote with your wallet as that is your power, use it, don't loose it.

>vote with your wallet as that is your power, use it, don't loose it. When you tell people to "vote with your wallet", you are implicitly admitting that people with bigger wallets have more votes. Literally millions of times more, in many cases. Don't vote with your wallet. involve yourself in local government, because legislation is the only way to solve problems like this.

Everyone votes (not specifically with their wallet) but with their choices. Perhaps there are some people who worry about the planet but continue to do it harm and not consider changing their behaviour. i would also translate voting with your wallet "put your money where your mouth is", instead of any concept of power differences between people, but thats just me.

Re: 400-year-old Greenland shark ‘longest-living vertebrate’ (2016)

#100

Post by rscho »

IgorPartola wrote: post #50
aloer wrote: post #42

Earlier quoted context omitted.

Related: there’s a new documentary on Netflix called Seaspiracy It has some staggering numbers regarding the amount of by-catch caught every day

I saw the preview for this last night and on the one hand I want to watch it because I feel that it’s important to know this stuff, but on the other hand I really just want to bury my head in the sand. Over the past year I’ve realized just how much we are killing the planet and how powerless I am so do anything at all about it and it’s depressing me every time I think about it and not in a figurative sense.

If you want to save the planet, start by unsubscribing from Netflix and stop using your phone for multimedia.
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