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!!!
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!
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
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?
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
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.
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. ☺
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!
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.
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!
This completely explained the formula I'd been trying to learn for my lab practical, thank you from the bottom of my heart
You're welcome! Thanks for taking the time to comment.
Very clear explanation, thank you!
+Aleksandr Hovhannisyan Thanks. I'm glad I could help.
today is my final ecology lab terminal nd this help me alot thank you
I'm glad I could be helpful! You're welcome.
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!!!
It is quite clear to me that you know much more about the subject than I do. Good luck!
Here because of AP biology❤ thx!
great video! I have to look over it a couple more times, but the explanation is very clear. THANK YOU :)
Thanks so much!
thank you. How can i calculate the 95% confidence interval in the repeated mark-recapture case?
Journal of the American Statistical Association, 2015, p.1491-1499
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!
I'm probably too late but th-cam.com/video/FWpQvwVcPRM/w-d-xo.html
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
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?
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?
Mr Cullian Appreciates your video
Thanks, Mr. Cullian!
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
Recapture. In the past I’ve used permanent marker on mouse tails. Different colors each day.
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?
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.
What is the difference between the C & R variables in the equation? I found the slides defining them to be confusing.
Nevermind! Thank you!
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. ☺
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.
@@haykmkrtchian5784 Thanks for this. Will do. 🙂
Very well explained.But for greater accuracy would( M1C1+M2C2+M3C3+MnCn)/R1+R2+R3+Rn be logical?
yes
Is this lincoln method or schnabel method
No idea, my apologies. Just my summary of the process from what I remembered learning.
what if zero marked organisms are present in the second capture???
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!
thank you for your reply :)
You're welcome!
I learned a lot thank you
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.
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!
I'm here because I want to know how many bugs are there in my program
I'm afraid I can't help you there...
Thank you so much. This was so useful!❤️
I'm happy to help! Thanks!
thank you, this video help and save time a lot
Good luck with the tasks :)
Glad it helped!
how do you do this for more captures? Im not great at maths aha. I did 6 visits
Just keep on going with the same pattern. It sure gets a bit ugly, but it works and (should get) more accurate.
if I'm counting for m4, should i take the number from m2 or m3 to add to the new individuals?
see john bingham question.
Thank you for your help; you explain very well.
Thank you! I'm glad I could help.
Thanks for the video
No problem!
Population ecology brought me here
Thanks for watching!
Thank you
so good. Gracias
Glad to help! De nada!
Nice 👊
Thanks!
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
we lost bro
this did not help
Sorry about that! This concept is definitely a tough one.
this is so bad
real
real
real