Mark recapture population estimation

[@elysiumcosplays]

This completely explained the formula I'd been trying to learn for my lab practical, thank you from the bottom of my heart

[@SiouxScience]

You're welcome! Thanks for taking the time to comment.

[@hovhadovah]

Very clear explanation, thank you!

[@SiouxScience]

+Aleksandr Hovhannisyan Thanks. I'm glad I could help.

[@mohizahmadd]

today is my final ecology lab terminal nd this help me alot thank you

[@SiouxScience]

I'm glad I could be helpful! You're welcome.

[@Ireallylovelasagnasomuch]

Here because of AP biology❤ thx!

[@michaellyons4758]

Any chance you could point me in the direction of a paper that uses the repeated mark-recapture formula given here? Or the name of the formula? Trying to use this formula for a class paper. Thanks!

[@kunjuskunj4991]

Can you please list out the indices of mark recapture model. I need a list like Lincoln Peterson estimate, Schnabel index like that.. so that it'll be very helpful for doing a dissertation on this topic for the completion of my masters degree

[@davidnoville1796]

thank you. How can i calculate the 95% confidence interval in the repeated mark-recapture case?

[@ww45435]

Journal of the American Statistical Association, 2015, p.1491-1499

[@retrodude7503]

great video! I have to look over it a couple more times, but the explanation is very clear. THANK YOU :)

[@SiouxScience]

Thanks so much!

[@syahiryusof98]

Thank you, sir! the repeat mark-recapture is also known as Schnabel estimate. Meanwhile, Chapman estimate is a modified version of the Lincoln-Petersen estimate that is widely used for capture-recapture. Pray for my bachelor fyp guys!!!

[@SiouxScience]

It is quite clear to me that you know much more about the subject than I do. Good luck!

[@josea413]

Hi! Thanks a lot for yout video its very clear, i have one question, if in a repeat mark-recapture model you register an individual on day 3 that was marked on day one, you count it normally as a recapture or this need an special treatment? Thanks a lot again

[@SiouxScience]

Recapture. In the past I’ve used permanent marker on mouse tails. Different colors each day.

[@SeihaHUN]

I would like to estimate population of giant land snails in a protected area, what is there any ways to mark snails that last for 1 year?

[@SiouxScience]

I can't think of anything that would last a year, to be honest. The only thing I can think of is fingernail polish covered with something waterproof... but over that period of time I think it would wear off or result in greater rates of predation?

[@johnbingham6355]

Very well explained.But for greater accuracy would( M1C1+M2C2+M3C3+MnCn)/R1+R2+R3+Rn be logical?

[@joshhyyym]

yes

[@colebirkett5856]

Mr Cullian Appreciates your video

[@SiouxScience]

Thanks, Mr. Cullian!

[@idwak2120]

The only thing that I do not understand here is how do you find Cn and Rn. Are they just picked randomly or they are defined by something?

[@josecantu8195]

What is the difference between the C & R variables in the equation? I found the slides defining them to be confusing.

[@josecantu8195]

Nevermind! Thank you!

[@silasvanbekkum4573]

I'm doing a research in which I got a trap happy mouse which got in my traps all 6 trapping nights. I'm wondering if there is a correction for that since my calculated population size now is lower than it probably is in reallity.

[@socioisbackapparently661]

Hi, I have a question re: a repeat-mark-recapture method. I will be using a jolly-seber model for trapping palm civets. If I design the trapping for 3 sampling sessions (2 wks apart) and each session will be 2-days straight. If I caught a civet during the 1st day and released it the same day but then got caught (and released) again the 2nd day, how would I treat the animal as data for the jolly seber model? I am confused since the 2 days would be treated as one session in the jolly-seber method. Thanks. Hope my question is clear. ☺

[@haykmkrtchian5784]

Keep them isolated. So if you caught them, hold on to them for the following day. Release all of them at once when the capturing is over.

[@socioisbackapparently661]

@@haykmkrtchian5784 Thanks for this. Will do. 🙂

[@windowcleaner7]

I learned a lot thank you

[@elepi30]

Hello, I was working with dogs, to try to stimate the quantity of dogs free on the street and see their movement dinamyc, we worked 2 day, doing 2 observantions each day. How can I apply your formula? Can I add M4 and C4 to formula? and Which is your bibliographic source?. Thanks.

[@SiouxScience]

You can definitely add a M4 and C4. I don't have a specific source that I've used for this formula - I believed it to be of relatively common use and practice. Most textbooks I have observed that cover the topic exhibit something to this extent. Interesting to study dogs and movement dynamics!

[@nazemabdrabo2584]

what if zero marked organisms are present in the second capture???

[@SiouxScience]

The R2 value would be zero. This suggests that you have an exceptionally large population or a sample size that is insufficient. It would probably indicate that your results as-is are questionable. Thanks for the great question!

[@nazemabdrabo2584]

thank you for your reply :)

[@SiouxScience]

You're welcome!

[@farhafareed6745]

Is this lincoln method or schnabel method

[@SiouxScience]

No idea, my apologies. Just my summary of the process from what I remembered learning.

[@sirilak1995]

thank you, this video help and save time a lot

[@sharoondaud9604]

Good luck with the tasks :)

[@SiouxScience]

Glad it helped!

[@halima7974]

Thank you so much. This was so useful!❤️

[@SiouxScience]

I'm happy to help! Thanks!

[@HayleyRobinsonhale]

how do you do this for more captures? Im not great at maths aha. I did 6 visits

[@SiouxScience]

Just keep on going with the same pattern. It sure gets a bit ugly, but it works and (should get) more accurate.

[@Crazy09starkillor]

if I'm counting for m4, should i take the number from m2 or m3 to add to the new individuals?

[@johnbingham6355]

see john bingham question.

[@BerniceWesselink]

Thank you for your help; you explain very well.

[@SiouxScience]

Thank you! I'm glad I could help.

[@franklineodhiambo2622]

Thanks for the video

[@SiouxScience]

No problem!

[@HUGODTHERO]

I'm here because I want to know how many bugs are there in my program

[@SiouxScience]

I'm afraid I can't help you there...

[@VictorGonzalez-xy3dh]

so good. Gracias

[@SiouxScience]

Glad to help! De nada!

[@Urianhans]

Thank you

[@TrueTalk_podcast]

Nice 👊

[@SiouxScience]

Thanks!

[@NaJaeminBakeshopSaKantoForSale]

Population ecology brought me here

[@SiouxScience]

Thanks for watching!

[@endeavor8850]

My fam, remember to subscribe to Pewdiepie and unsub from T-Series. We must win the raise, M E M E R E V I E W! YEEET lol

[@mugen7954]

we lost bro

[@TimesRemorse]

this did not help

[@SiouxScience]

Sorry about that! This concept is definitely a tough one.

[@capybatman-qr2oz]

this is so bad

[@wihi1829]

real

[@rohitmarem7133]

real

[@mayhem9504]

real