EVPP 110 Lab: lab report peer review process predator-prey interactions: Activity 1 – learning the rules activity 2 – coyotes go hunting Week of March 26th 2017 Version 1.0. Last updated: 11/10/2018 11:06:03 PM11/10/2018 11:06:03 PM

Formal Lab Report – Peer Review Process Grade the lab reports of two other students in the class using the grading rubric. Staple completed grading rubric to top of the hard copy of the lab report and turn it in (or take a picture and upload to BlackBoard with your Weekly Data Sheets). Graded lab reports will be returned to authors.

Predator-Prey Interactions – Activity 1: Learning the Rules of the Community

Number of hares (thousands) Predators/prey interactions are important for: 1) Determining populations of both predators and prey; 2) Determining and maintaining community structure. Hare Lynx Number of hares (thousands)

Mice population, survival and reproduction In each generation, there will always be at least 10 mice on the plate. The number of mice may be higher as determined by previous generation, but cannot be lower than 10 or higher than 100. For example, if you end a generation with 4 mice, doubling its population would only bring you to 8. You must add 2 so that you start the next generation with 10. If doubling would result in >100 mice, only count 100.

Coyote population At the beginning of each generation there must always be at least one coyote (a spoon), presumed to have arrived there by immigration. If all your coyotes from a given generation fail to survive, or decide to emigrate, start each new generation with one coyote, presuming that it has recently migrated to the area.

Coyote survival and reproduction Success: For a coyote to survive, it must capture at least 5 mice in each generation. For every 5 mice that a coyote catches in a given generation, the coyote will reproduce and generate 1 offspring, which will then be available to hunt at the beginning of the next generation. Failure: If a coyote captures 4 or fewer mice, it fails to survive, or decides to emigrate, and will not be present at the beginning of the next generation.

Hunting Coyotes hunt for mice by “running” through the field. Simulate the hunt by slowly swiping a spoon across the plate once per generation, attempting to scoop up beans (mice), with no assistance from other hands, spoons, etc. The number of beans scooped up in the spoon represent the number of mice caught by the coyote for that generation. Example: if a generation begins with a single coyote in the community, slowly swipe one spoon across the plate one time and scoop up as many beans as possible, without any other assistance. If there are 2 coyotes in the population, swipe two spoons sequentially.

Predator-Prey Interactions Activity 2 – Coyotes Go Hunting

# of mice caught by each coyote (#1-17) Generation # 1 2 3 4 5 6 7 8 9 10 Initial # mice 18 30 48 76 Initial # coyotes # of mice caught by each coyote (#1-17) X 11 12 13 14 15 16 17 # mice captured # mice surviving # coyote surviving # coyote offspring Table 2.1. Number of mice caught by coyote, survivors and coyote population data for generations 1-10 (p. 481) Begin with generation 5, with 76 mice and 2 coyotes, (Table 2.1).

# of mice caught by each coyote (#1-17) Generation # 11 12 13 14 15 16 17 18 19 20 Initial # mice Initial # coyotes # of mice caught by each coyote (#1-17) 1 2 3 4 5 6 7 8 9 10 # mice captured # mice surviving # coyote surviving # coyote offspring Table 2.2. Number of mice caught by coyote, survivors and coyote population data for generations 11-20 (p. 485)

What’s Due Weekly Data Sheets (due today): P. 481 and 485. Weekly Write-Ups (due next class): P. 489-490. PowerPoint available at https://eeltown.org/evpp-110-spring-2018/