107k views
4 votes
Why does sewage decrease the number of mayfly larvae??

User Kemba
by
8.9k points

2 Answers

2 votes
it damages the mayfly larvae. hope this helps
User Mittal Varsani
by
8.3k points
1 vote
The sewage is full of bacteria which uses a lot of oxygen and the mayfly larvae might not have enough oxygen to live if they live by sewage
User Joshayers
by
8.7k points