ecosystems question Watch
- Study Helper
Blue tits are common British birds. Some aspects of the behaviour of blue tits at different times of the year are summarised below.
April-July Breeding season. Eggs laid and young hatch. Adult birds collect food for their young from within their territories.
(it does have different parts of the year but I dont think its necessary for the question)
question (a) and (b)(i) were about the mark-release-recapture technique. I didnt have a problem with these, but (b)(ii) was this
Suggest how the population of adult blue tits in a wood might be estimated between April and June.
The mark scheme says this, and I quote this
Gives reliable estimate of number of adult blue tits; 2
Help please, I have no idea what the mark scheme means. My answer for this question was 'Set traps which only tag the birds, not capture them, traps must contain food for the adults young'
positive rep for whoever helps, please help
M= total no. In first sample
C= total no. In second sample
R= number of marked individuals in recaptured sample
- Study Helper
To elaborate on my answer I beleve they are asking you to use this formula which is the formula which you need to estimate the population size once you've done the sampling.
(b)(i) said give two reasons why the mark-release-recapture technique would not give a reliable estimate of the blue tit population in a wood between April and June.
I had no problem with them 2, but they're both about the mark-release-recapture method, is the last question a trick one? These sort of questions annoy me, and even the mark scheme doesnt help
Thanks for trying to help