Human male sperm count failed 60 per cent since 1970s, so the effect is almost the same. Something is killing small things! Seriously, may be there is unidentified toxin which slowly affects both sperm and insects?
And, like with sperm, it may be that there were many more insects than needed to fulfill their role? Like, if 20 sperm reach an egg, you can lose 95% of them and end up just as pregnant.
Human male sperm count failed 60 per cent since 1970s, so the effect is almost the same. Something is killing small things! Seriously, may be there is unidentified toxin which slowly affects both sperm and insects?
https://www.researchgate.net/blog/post/sperm-counts-in-the-western-world-have-declined-nearly-60-percent-since-the-1970s
And, like with sperm, it may be that there were many more insects than needed to fulfill their role? Like, if 20 sperm reach an egg, you can lose 95% of them and end up just as pregnant.
Not entirely true; low sperm counts are associated with low male fertility in part because sperm carry enzymes which clear the way for other sperm—so a single sperm isn’t going to get very far.
95% of the sperm reaching the endpoint, then, if they’re not independent.