One of the bigger reasons has to do with the square cube law - as the size of something increases, surface area increases by a factor of 2 but mass increases by a factor of 3, so little fishes have a surface area-to-mass ratio that is quite a bit higher than a larger fish, and they’re more susceptible to abrupt changes in temperature.
Kinda like how an ice cube will melt a lot faster than a big slab of ice, the core temperature of some small fish like a goldfish is gonna change more rapidly than the core temperature of a big fish like a trout so they tend to be a lot more finnicky in regard to significant and instantaneous changes to temperature and stuff. A larger fish might shrug off a significant change because it affects them more slowly, but that might be a totally wild an overwhelming experience for a little fish to go through
And in a similar but completely different way, the fish are being added to massive bodies of water. Home aquariums are minute in comparison, so they can’t balance out chemical swings as easily and are much more prone to higher levels of nitrites and other toxic chemicals. The larger the body of water, the more stable the water quality.
I’m confused though. Don’t people use this to talk about how small things like bugs can fall from a large height and be uninjured, but large things like a human or elephant will be injured if falling from a height? I feel like what you’re saying is backwards to what the internet has told me.
You can yeet goldfish. Carp are stupid tough. It’s the tropical fish we often keep that are kinda wimpy. Also, they’re not coming from a super healthy environment (the store) to our tanks.
One reason is because the hatcheries are in the same general area as the lakes, so conditions are pretty similar. The temperature will be about the same at the same depths as the hatchery, and the water comes from the same source.
jared@mander.xyz 3 days ago
According to the links in this post It’s 95%-99% survival.
Iheartcheese@lemmy.world 3 days ago
Then why can’t I yeet a bunch of goldfish
_bcron_@lemmy.world 3 days ago
One of the bigger reasons has to do with the square cube law - as the size of something increases, surface area increases by a factor of 2 but mass increases by a factor of 3, so little fishes have a surface area-to-mass ratio that is quite a bit higher than a larger fish, and they’re more susceptible to abrupt changes in temperature.
Kinda like how an ice cube will melt a lot faster than a big slab of ice, the core temperature of some small fish like a goldfish is gonna change more rapidly than the core temperature of a big fish like a trout so they tend to be a lot more finnicky in regard to significant and instantaneous changes to temperature and stuff. A larger fish might shrug off a significant change because it affects them more slowly, but that might be a totally wild an overwhelming experience for a little fish to go through
BanjoShepard@lemmy.world 3 days ago
And in a similar but completely different way, the fish are being added to massive bodies of water. Home aquariums are minute in comparison, so they can’t balance out chemical swings as easily and are much more prone to higher levels of nitrites and other toxic chemicals. The larger the body of water, the more stable the water quality.
TriflingToad@sh.itjust.works 3 days ago
something i love about Lemmy is that on the drop of a hat someone is willing to calculate the “surface area to fish ratio”
ziggurat@lemmy.world 3 days ago
The math actually works, and is quite simple. Just assume the fish is a sphere
dingus@lemmy.world 2 days ago
I’m confused though. Don’t people use this to talk about how small things like bugs can fall from a large height and be uninjured, but large things like a human or elephant will be injured if falling from a height? I feel like what you’re saying is backwards to what the internet has told me.
FooBarrington@lemmy.world 2 days ago
Who’s stopping you?
Image
MAKE your DREAMS come TRUE
jared@mander.xyz 3 days ago
Technique I imagine.
explodIng_lIme@lemmy.world 3 days ago
Skill issue
shalafi@lemmy.world 3 days ago
You can yeet goldfish. Carp are stupid tough. It’s the tropical fish we often keep that are kinda wimpy. Also, they’re not coming from a super healthy environment (the store) to our tanks.
skulblaka@sh.itjust.works 2 days ago
I would watch carp throwing as a competitive sport, they aren’t going to make it easy
SpruceBringsteen@lemmy.world 3 days ago
Have a pilots license?
danc4498@lemmy.world 3 days ago
Maybe 95% survive, but how many are injured in a way that might impact their quality of life?
Since these are being dropped specifically for the purpose of being caught and killed asap, quality of life might not matter.
For your sad little goldfish, please be gentle!
subtext@lemmy.world 3 days ago
Also, gotta think about whether 5% mortality rate is acceptable.
For an airdrop number of pond fish? Sure!
For your hobbyist number of expensive fish? Absolutely not
Ilovethebomb@lemm.ee 2 days ago
My understanding is these are juvenile fish that will be caught as adults, so they will live for a while.
bluewing@lemm.ee 2 days ago
You certainly can!
Anticorp@lemmy.world 3 days ago
One reason is because the hatcheries are in the same general area as the lakes, so conditions are pretty similar. The temperature will be about the same at the same depths as the hatchery, and the water comes from the same source.
Sonor@lemmy.world 3 days ago
Try to fly higher above the tank and see if it helps
zik@lemmy.world 2 days ago
I wonder what the “duck that hurt” rate is for these fish
Didros@beehaw.org 2 days ago
…that sounds to me like “survive the fall” more than “survive the week”