AIS Notes Flashcards
1
Q
What makes a species invasive?
A
- are not native to the ecosystem
- out compete the native species for resources
- have very few predators
- reproduce quickly
2
Q
How many eggs can 1 female zebra muscle produce per year?
A
1 million eggs per year
3
Q
How do zebra muscle attach to hard surfaces?
A
Using byssal threads
(Fibres which come out of their valve area)
4
Q
What are zebra muscle larvae called? How long are they in the larval stage until they attack to a substrate?
A
Veligers
Are larvae for 2-3 weeks
5
Q
What are some impacts of zebra muscles?
A
- altered food chain
- decrease in native mussel population
- reduced recreational potential (sharp shells in water and on land)
- clogs water pipes and disrupts water supply
- increase in toxic algae
6
Q
Where in Canada were zebra muscles first discovered. When?
A
Lake Erie - 1986
