monday 2/24
DESCRIPTION
Monday 2/24. Pop Quiz #6 Review Prickly Pear math questions See Salamanders and Lizards – Quiz M 3/3 Chapter 9 – L-P population estimates Due today: all of Prickly Pear Case Study Exam postmortem due Wednesday!!. Class Amphibia. Order Anura – frogs and toads - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/1.jpg)
![Page 2: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/2.jpg)
Monday 2/24
1. Pop Quiz #62. Review Prickly Pear math questions3. See Salamanders and Lizards – Quiz M 3/34. Chapter 9 – L-P population estimates
5. Due today: all of Prickly Pear Case Study
6. Exam postmortem due Wednesday!!
![Page 3: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/3.jpg)
Class Amphibia• Order Anura – frogs and toads• Order Caudata – salamanders and newts• Order Apoda – caecilians
Class Reptilia• Order Testudines - turtles, terrapins, and
tortoises• Order Squamata - lizards and snakes• Order Crocodilia - crocodiles and alligators
![Page 4: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/4.jpg)
Missouri Lizards and Salamanders
All images are from Wikimedia Commons, unless otherwise
identified
![Page 5: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/5.jpg)
![Page 6: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/6.jpg)
Common mudpuppyNecturus maculosus
![Page 7: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/7.jpg)
HellbenderCryptobranchus alleganiensis
![Page 8: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/8.jpg)
Ringed salamanderAmbystoma annulatum
![Page 9: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/9.jpg)
Tiger salamanderAmbystoma tigrinum
![Page 10: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/10.jpg)
Spotted SalamanderAmbystoma maculatum
![Page 11: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/11.jpg)
Eastern newt, red-spotted newtNotophthalmus viridescens
![Page 12: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/12.jpg)
Broad-headed skinkPlestiodon laticeps
![Page 13: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/13.jpg)
American five-lined skinkPlestiodon fasciatus
![Page 14: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/14.jpg)
Little brown skinkScincella lateralis
![Page 15: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/15.jpg)
Prairie lizard, eastern fence lizardSceloporus undulatus
![Page 16: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/16.jpg)
Not on quizAxolotl
Ambystoma mexicanum
![Page 17: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/17.jpg)
Chapter 9 – Population Distribution and Abundance
• What are some methods of counting populations?
![Page 18: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/18.jpg)
Chapter 9 – Population Distribution and Abundance
• What are some methods of counting populations?– What if the individuals are mobile?– Hidden/“cryptic”?– What if we only have a sample?
![Page 19: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/19.jpg)
Required variables
• N = n1n2/m2
• N = estimated population size• n1 = number of individuals marked in first
sample.• n2 = number of individuals marked in second
sample.• m2 = number of individuals captured in second
sample, that were marked in the first.
![Page 20: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/20.jpg)
This method only works IF:
• Probability of survival is equal• Births and deaths are insignificant between
release and recapture• Immigration and emigration are nonexistent or
insignificant• Marked individuals re-mix randomly• The mark makes it no easier or more difficult to
recapture• Marks are permanent
![Page 21: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/21.jpg)
Practice
A biologist nets 45 largemouth bass from a farm pond, tags their fins, and releases them unharmed. A week later, she nets 58 bass from the pond, including 26 tagged. Based on the L-I index, estimate the size of the population.
![Page 22: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/22.jpg)
Mark-Recapture
• m2 / n1 = probability that an animal will be captured.
• So, how large is the population?• n2 is really the portion of N that we expect to
capture. • This is N*p = n2 where p is m2/n1.
![Page 23: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/23.jpg)
Population Density
• So, N*p = n2
• N = n2 / p
• N = n2 / (m2 / n1) = n1n2 / m2
• But, this is only part of the problem. We also need some estimate of area since Density, D = N / A.
![Page 24: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/24.jpg)
Population Density
• Imagine we study rodents using a trapping grid w/ 15m trap spacing.
• We trap the animals over a series of nights, always noting the identity and location of each animal.
• Then, we can estimate how far each individual moved between captures.
![Page 25: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/25.jpg)
Population Density
• Now, if an organism can travel from one station to the next, we can assume that it could travel half the distance to the next station as well.
• Thus, the ‘effective area’ of our sample is the area of our grid, plus a border region around the grid, with a width of half the distance between stations.
![Page 26: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/26.jpg)
Population Density
![Page 27: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/27.jpg)
Area?
• What is the area of the grid?• Ag = W2
• How about the 4 rectangles?• Ab = 4 * W * (0.5 * D)
• How about the 4 corners?• This is essentially the area of a circle.• Ac = (0.5D)2
![Page 28: Monday 2/24](https://reader036.vdocument.in/reader036/viewer/2022062305/56815d0b550346895dcb0d88/html5/thumbnails/28.jpg)
Population Density
• Finally, density can be estimated as
D
n nm
W WD D
1 2
22 22 05 ( . )