MYTUTOR SUBJECT ANSWERS

848 views

What are the steps involved in the mark-release-recapture technique and which factors does it rely upon?

Mark-release-recapture is a technique used to estimate the size of a population of a particular species. The steps involved are:

1. Capture and count animals.

2. Mark them in a way which is not toxic/harmful to them.

3. Release them back into the community.

4. Capture a second sample and count them.

5. Record the number of marked individuals recaptured.

The estimated population size is:

(total no. in 1st sample x total no. in 2nd sample) / no.of marked individuals recaptured

However, this technique only works if the following factors are in place:

1. There are few births and deaths in the population.

2. The population has a definite boundary; there is no emigration or immigration.

3. The proportion of marked:unmarked individuals in the second sample is the same as the proportion in the population as a whole.

4. Marked individuals from the first sample distribute themselves evenly amongst the rest of the population and have sufficient time to do so.

5. The method of marking is non toxic / does not make them more conspicuous to predation.

6. The method of marking is not lost / rubbed off during the investigation.

Aditi A. GCSE Biology tutor, A Level Biology tutor, GCSE Chemistry tu...

2 years ago

Answered by Aditi, an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

164 SUBJECT SPECIALISTS

£20 /hr

Charlotte C.

Degree: Biological Sciences (Masters) - Durham University

Subjects offered:Biology

Biology

“Hi! If you're looking at my profile, you're probably finding Biology a bit tricky and just need a hand understanding some of the (admittedly complicated!) parts of the course. You'll be relieved to hear that I was once in your shoes -...”

Ollie W. 13 Plus  Maths tutor, A Level Maths tutor, 11 Plus Maths tut...
£20 /hr

Ollie W.

Degree: Biochemistry (Masters) - Oxford, Lady Margaret Hall University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
Chemistry
-Oxbridge Preparation-

“I'm Ollie and I'm a friendly, engaging and enthusiastic Biochemistry student at Oxford, whose aim is to support and stretch students in their science studies!”

£20 /hr

Michal D.

Degree: Medicine (Bachelors) - Newcastle University

Subjects offered:Biology, Human Biology+ 4 more

Biology
Human Biology
Chemistry
.UKCAT.
-Personal Statements-
-Medical School Preparation-

“I am a third year Medical Student at Newcastle University, currently undertaking a clinical placement year in hospital. While at Sixth form I was able to gain experience in tuition by helping out other students in their GCSEs and A-Le...”

About the author

Aditi A.

Currently unavailable: for regular students

Degree: Medicine (Bachelors) - Oxford, Hertford College University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
Chemistry
-Medical School Preparation-

“Hi, I'm Aditi and I'm currently studying Medicine at Oxford. I'd love to help out with Sciences, Maths and any Medical School Applications!”

You may also like...

Posts by Aditi

What are the key steps in the light dependent reaction of photosynthesis?

What are the steps involved in the mark-release-recapture technique and which factors does it rely upon?

Other A Level Biology questions

How do I answer a 'Describe and Explain' question?

What are the different stages of Mitosis?

Outline how cystic fibrosis leads to recurrent lung infecions

What is homeostasis?

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok