Marking animals in general is still also one of the most common methods for
estimating and modeling population changes (size and demographics). Unless
the population is particularly tiny, some form of mark and recapture is the
main way to measure population size, age classes, gender ratios, change of
population etc. (Using logic and statistics, over time you can get a good
estimate of real population from mark and recaptures).
This kind of information can be very useful for conservation efforts
because you can predict future population sizes based on age and gender
ratios. Thus you can often measure the success or failure of conservation
plans much earlier than the results from mere counts.
Of course whether some form of marking is a good thing also depends on the
specifics of each case, and I know nothing about whether mortality changes
for banded birds. I imagine different species are affected differently.
There has been lots of research on some types of marking animals in general
and sometimes it can increase mortality, while other times it doesn't.
Jeremy
On 24/02/2013 9:31 PM, "Chris Cooper" <> wrote:
> In relation to benefits of bird banding; at one point people thought we
> knew everything there was to know about physics. Lord Kelvin (1824- 1907)
> said:
>
> "There is nothing new to be discovered in physics now, All that remains is
> more and more precise measurement."
>
> It difficult to imagine anything further from the truth. The point is we
> don't know what we don't know and we will never know unless we do the
> research.
>
> I addition to proving points in relation to developments, knowing the
> birds movements better and their habitat preferences has to help with
> conservation.
>
> Chris Ross
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