Lect 1 Flashcards
Rosie wolf snail
-native
- Native to the SE US and introduced into Hawaii
- The snails in Hawaii were naive to these sorts of predators
Rats and cats
- Have the caused the extinction of birds
- mostly on islands
There are reduced populations of other things through competition
Example
Zebra mussels
There are reduced populations of other things through competition
- zebra mussels
- live
-Live in freshwater where other few mussels live
-They will even grow on top of things
-Native to Asia
-Well into the Mississippi Watershed, Eerie Watershed
Its not yet established in the susquehanna watershed
There are reduced populations of other things through competition
- zebra mussels
- what they do
- They reproduce so quickly so they take over the place where other mussels grow
- Cost the US millions of dollars
- They eat all the food before other things even have a chance to get to it
There are reduced populations of other things through competition
- zebra mussels
- good
The good is that they filter the water
There are reduced populations of other things through competition
- zebra mussels
- bad
The bad is that you don’t get many other mussels
There are reduced populations of other things through competition
- zebra mussels
- to detect them
To detect Zebra mussels you take a water sample and look for zebra mussel DNA using barcoding
When you introduce them they can breed with the native species
Our mallard ducks (genus is anas) are super aggressive.
-species
Anas is a huge genus that has alot of species. The boundaries between species are not very strong so they hybridize all the time
Our mallard ducks (genus is anas)
-problem
- The problem is we have taken them to places.
- took them to new Zealand.
Mallard ducks
-genetic swamping
- Genetic swamping is when you keep back crossing to the point where the distinction between the two species is gone.
- The female hybrids almost always reproduce with mallards. So now the population is largely 75% mallard. Those females will now mate with mallards again making it approximately 82%. You get to the point where its 99.9999%
Human health and invasions
Two examples
1 Aedes japonicus
Invasive mosquito
2 Ades egypticus
Mosquito
Ades egypticus
Mosquito
- Primary vector for malaria
- –It is the most competent mosquito to carry malaria
- It is here
- To be a competent vector means you can carry it and be a good definitive host
primary culprits for malaria:
Vivax, falciparum, plasmodium
Aedes japonicus
Invasive mosquito
- Asian tiger mosquito is the albo pictus
- Vectors for the really nasty flavy viruses
Family of viruses that cause alot of diseases
Yellow fever, west vile, triple E
-They come out during the day and night