I wonder whether the lives of those moths were net negative. If the population was rising, then the number of moths dying as larvae might’ve been fairly small. I assume that OPs apartment doesn’t have many predatory insects or animals that eat insects, so the risk of predation was fairly small. That leaves five causes of death: old age, hunger, thirst, disease and crushing.
Death by old age for moths is probably not that bad? They don’t have a very long life, so their duration of death also doesn’t seem very long to me, and couldn’t offset the quality of their life.
Hunger and thirst are likely worse, but I don’t know by how much, do starved moths die from heart problems? (Do moths have hearts?)
Disease in house moth colonies is probably fairly rare.
Crushing can be very fast or lead to long painful death. Seems the worst of those options.
I think those moths probably had a better life than outside, just given the number of predatory insects; but I don’t think that this was enough to make their lives net-positive. But it’s been a while since I’ve read into insect welfare, so if most young insects die by predation, I’d increase my credence in those moths having had net-positive lives.
I think it’s right to at least be open minded about the possibility that their lives might be generally good, all things considered.
To answer your question: insects don’t have hearts because they don’t have blood. Oxygen is transported to their cells by many tiny tubes (tracheae) extending from holes (spiracles) all over their thorax and abdomen.
I wonder whether the lives of those moths were net negative. If the population was rising, then the number of moths dying as larvae might’ve been fairly small. I assume that OPs apartment doesn’t have many predatory insects or animals that eat insects, so the risk of predation was fairly small. That leaves five causes of death: old age, hunger, thirst, disease and crushing.
Death by old age for moths is probably not that bad? They don’t have a very long life, so their duration of death also doesn’t seem very long to me, and couldn’t offset the quality of their life.
Hunger and thirst are likely worse, but I don’t know by how much, do starved moths die from heart problems? (Do moths have hearts?)
Disease in house moth colonies is probably fairly rare.
Crushing can be very fast or lead to long painful death. Seems the worst of those options.
I think those moths probably had a better life than outside, just given the number of predatory insects; but I don’t think that this was enough to make their lives net-positive. But it’s been a while since I’ve read into insect welfare, so if most young insects die by predation, I’d increase my credence in those moths having had net-positive lives.
More:
Speculations on Invertebrate Population Dynamics Relevant to Reducing Suffering (Brian Tomasik, 2019), sections Should we err on the side of not squishing healthy insects due to r-selection? and Should we (humanely) squish non-predator insects?
Killing Animals and Turnover (Brian Tomasik, 2014)
I think it’s right to at least be open minded about the possibility that their lives might be generally good, all things considered.
To answer your question: insects don’t have hearts because they don’t have blood. Oxygen is transported to their cells by many tiny tubes (tracheae) extending from holes (spiracles) all over their thorax and abdomen.