Bottleneck effect helps the biologists to save species nearing extinction because it helps in reestablishment of the species.
Specified, widespread violence or purposeful culling, human population planning, and other human actions such as famine, earthquakes, floods, fires, disease, and droughts can all cause population bottlenecks. Population bottlenecks can also occur owing to genetic bottlenecks. Such occurrences can lessen the genetic variety of a community, leaving just a smaller population to transmit genes to future generations of offspring through sexual reproduction.
from such a small population by continuously breeding and providing good environment the again flourishment of the species can take place.
Thus, this small population is now taken care of by biologist so that the proper sexual reproduction can take place and thus the population is maintained and thus conservation takes place.
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