The economic recovery has not revived population growth in those areas and, according to an analysis by William Frey, a demographer at the Brookings Institution, has only served to flatten it further.
Massive captive breeding of Houbara bustards in artificial environments has been attempted, but to date has not been successful in reviving population numbers.
Captive breeding programmes have, hitherto, been unsuccessful in reviving population numbers and thus radical technological solutions are essential for the long term survival of this species.
For each block, revived population samples were cultured alongside for two generations under common environmental conditions.
'The old saying is that elephants have good memories,' says Jonathan, 'but this is really true, and is the reason citrus fruits are forbidden in Addo.' To try to revive a population decimated by landowners protecting their property, the first rangers supplied oranges to encourage the elephants to stay within park boundaries.
At one point, I was tagging lobsters as part of an effort to find ways to revive depleted populations.
In parts of northeastern and southwestern Kazakhstan, where commercial fishing collapsed as a result of industrial and agricultural pollution, efforts to revive fish populations have shown some success.
He said that reviving the population of a large woodpecker requiring a big range, with the habit of moving over large distances, would be very difficult.
It is not the first time that there have been plans and promises to revive the shellfish population.
A ban on the use of such chemicals would not be enough on its own to revive the honeybee population, which Walker said have also been affected by habitat loss, disease and parasites.
