Captive Breeding and Release ENVS1
MAy have too much on one brainstorm.
- Created by: José
- Created on: 03-05-13 20:20
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- Captive Breeding..
- Zoos , Botanic gardens, Seed banks
- Methods of increasing success of captive breeding
- Cryopreservation, egg, sperm and embryo storage
- Deep frozen sperm can be transported long distances
- Stored sperm can also be used to produce off spring long after the parent has died
- Artificial Insemination
- Removes problems and risks of normally breeding and moving animals
- Embryo Transfer
- The gestation period ( length of pregnancy) can be reduced by Embryo Transfers
- Some surrogate mothers can greatly increase the number of young
- Micro-Propagation
- A form of tissue culture where many clusters of cells can be produced from a single young plant or tissue sample
- All are genetically identical
- Release of captive-bred animals
- They may not recognise food species or poisonous foods
- They may be poor hunters or not as good at escaping predators
- Some may have no developed hunting skills in captivity
- May have no immunity to local diseases
- May not be accepted by indigenous population
- Species like apes and monkeys, with close social structures may reject them
- Meaning they cannot breed and are less likely to have protection
- Specific behavioral patterns may not have been learnt
- Other species have colonised and taken over their niche
- Cryopreservation, egg, sperm and embryo storage
- Problems
- Captive Breeding..
- Zoos , Botanic gardens, Seed banks
- Methods of increasing success of captive breeding
- Cryopreservation, egg, sperm and embryo storage
- Deep frozen sperm can be transported long distances
- Stored sperm can also be used to produce off spring long after the parent has died
- Artificial Insemination
- Removes problems and risks of normally breeding and moving animals
- Embryo Transfer
- The gestation period ( length of pregnancy) can be reduced by Embryo Transfers
- Some surrogate mothers can greatly increase the number of young
- Micro-Propagation
- A form of tissue culture where many clusters of cells can be produced from a single young plant or tissue sample
- All are genetically identical
- Release of captive-bred animals
- They may not recognise food species or poisonous foods
- They may be poor hunters or not as good at escaping predators
- Some may have no developed hunting skills in captivity
- May have no immunity to local diseases
- May not be accepted by indigenous population
- Species like apes and monkeys, with close social structures may reject them
- Meaning they cannot breed and are less likely to have protection
- Specific behavioral patterns may not have been learnt
- Other species have colonised and taken over their niche
- Cryopreservation, egg, sperm and embryo storage
- Expensive not enough money to keep populations of endangered species in captivity
- Species with complicated interactions
- Plants with symbiotic relations, Mycorrhizal root fungi
- Stimulated Factors needed for Breeding
- Day length, light level, temperature, amount of food, amount of stored body fat, suitable site for courtship, same partner, new partner, open spaces.
- Knowledge of habitat requirements limited
- Inbreeding
- Harmful recsesive genes could be expressed and cause undesirable characteristics
- Use of stud book to track family trees of individuals to make sure they are as unrelated as possible
- Possibility of interbreeding (Hybridise) something that wouldn't naturally in the wild.
- May course unique features to be lost and future release programs would not be reintroducing the same species into the wild
- Problems with seedbanks
- Viability of the seeds declines
- Gene pool reducted
- Need to be regularly germinated, cultivated to produce more for storage, which would be expensive
- Larger seeds or fruits harder to store
- Seeds with higher water content, e'g coconuts are harder to store due to natural preservation
- Captive Breeding..
- Diffculty in providing food for species
- Problems
- Expensive not enough money to keep populations of endangered species in captivity
- Species with complicated interactions
- Plants with symbiotic relations, Mycorrhizal root fungi
- Stimulated Factors needed for Breeding
- Day length, light level, temperature, amount of food, amount of stored body fat, suitable site for courtship, same partner, new partner, open spaces.
- Knowledge of habitat requirements limited
- Inbreeding
- Harmful recsesive genes could be expressed and cause undesirable characteristics
- Use of stud book to track family trees of individuals to make sure they are as unrelated as possible
- Possibility of interbreeding (Hybridise) something that wouldn't naturally in the wild.
- May course unique features to be lost and future release programs would not be reintroducing the same species into the wild
- Problems with seedbanks
- Viability of the seeds declines
- Gene pool reducted
- Need to be regularly germinated, cultivated to produce more for storage, which would be expensive
- Larger seeds or fruits harder to store
- Seeds with higher water content, e'g coconuts are harder to store due to natural preservation
- Bamboo for pandas
- Problems
- Insects for bats
- Diffculty in providing food for species
- Bamboo for pandas
- Diffculty in providing food for species
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