- No special provisons required - well adapted.
- Both species and habitat are conserved - chance of population recovery far greater.
- Difficult to control - vast areas to guard - difficult to control poachers, predators and climate change.
- Species not accepted by other members of the species already present.
- Enviroment controlled
- Predation anf hunting can be monitored and managed easily. - Health monitored, treat diseases etc. - Manipulate breeding ( hormones, artificial insemination, artificial selection) - reintroduce species that have migrated to other areas. - Study rare species at close range.
- Only a small number can be catered for.
- Difficult and expensive.
- Less successful then In Situ - stressful for species.
- Species cannot adapt when introducced to natural environment.
To help increase success of Ex Situ:
- Choose individuals from different areas - increases gene pool.
- Choose unrelated individuals - less risk of inbreeding.