Dallas Zoological Society Partnership : Zoo Science

Monitoring Animal Populations

Topic Overview
Quick Facts
Animals on land have padded feet in order to sneak up on their prey.
There are four types of tracks left by a snake, each representing a different method of travel – rectinilear, concertina, serpentine, and sidewinding.
The single greatest threat to green sea turtles is the development of Fibropapilloma Tumors, a disease caused by unknown reasons has reached epidemic proportions in geographic locations as distant as Hawaii, Florida and Australia.
Night vision goggles and glow-in-the-dark tracking powder can be used to track animals at night.
Black bears use the same trails over and over for generations. They tend to place their paws in exactly the same spot every time they follow the trail.
Male and female deer leave different tracks. Males have wider shoulders, so that the hind tracks (the ones on top) will tend to fall inside the line of travel. Female deer have wider hips, so that the hind tracks will fall outside the line of travel.
There are four satellites used to track animals. These satellites are part of the Argos data collection system sponsored in part by the National Oceanic and Atmospheric Administration (NOAA).
Animal scat dries from the inside out.
Salvador Dali owned a pet ocelot. He once traveled with this pet aboard the luxury cruise liner SS France.
Begin the Lesson
Animal tracking is the process of finding animals in the wild. It is important to observe animals in their natural habitat in order to measure biodiversity, estimate population size, monitor ecological interactions, and study behavior. The large variety of techniques for tracking animals includes: 1) the collection of visual and acoustic observations; 2) the analysis of footprints and other physical tracks through mud, sand, snow, and vegetation; 3) the analysis of animal scat, hair, and fur; 4) the use of live traps and camera traps; and 5) the use of radiotelemetry and satellite tracking. Radiotelemetery is particularly useful because it allows scientists to study animals without directly disrupting their habitat, providing information about location, activity, habitat use, spatial requirements, seasonal shift, and social interactions.
Whole Class Introduction to the Lesson
You will need at least one computer with Internet connectivity and a projection device, a classroom with more than one computer, or access to a computer lab. This introduction will take approximately 10 minutes to complete.
Read the introductory slide to the class and then click on “Start Tracking Game.” As a class, try to guess the five mystery animals using the tracking clues provided in the pictures and audio.
Sample Questions:
Describe the picture.
How did the animal leave this mark?
How might we tell what time the animal passed by this location?
What type of ecosystem and climate is suggested by the picture?
What does the audio tell us about the animal?
What type of animal do you believe made these tracks?
As part of the introduction, you may want to review some of the glossary terms in advance of students going online. At this point you can launch the WebLesson as whole-class activity using a projection device, or you can assign students to work individually or in teams in a computer lab.
WebLesson Sites
Introduction
Zoos give us an opportunity to see exotic animals that we would not usually see in our own communities. It would be difficult for most of us to trek across the Arctic ice to search for polar bears or to slash through the dense Colombian forest to gaze on a giant anaconda. Zoos bring animals out of the wild and into our towns and cities.

Zoos are also important as a refuge for threatened species. Human population growth and economic development have led to habitat destruction and threats to biodiversity. Many zoos around the country participate in conservation efforts to learn about animal behavior in order to preserve and restore habitats for endangered species.

In order to determine the needs of a given species and to measure trends in biodiversity, it is necessary to locate and track animal populations in the wild. Researchers have developed sophisticated methods for finding, tagging, and following animals. The analysis of animal tracks, fur, and droppings provides valuable insight into behavior and diet. Recent technology even allows satellites to trace the movement of animals.

Tracking animals can also be a pleasurable recreational activity, using simple tracking techniques to discover what types of animals roam through our backyards and parks. We can even use tracking techniques to keep track of members of our own species.

Scenario
You volunteer for the local zoo. Your team has been assigned the job of finding and locating any large injured animals in the forest. In the past you have rescued and brought back a bear and a tiger.
Lesson Pages
EEK! – Follow that footprint, paw print, hoof print…
http://www.dnr.state.wi.us/org/caer/ce/eek/nature/track.htm
Rich Media
Beartracker’s Animal Tracks Den
http://www.bear-tracker.com/index.html
Outdoor Action Guide to Animal Tracking
http://www.princeton.edu/~oa/nature/tracking.shtml
Tracking and Trailing – Animal Scat
http://www.bear-tracker.com/animalscat.html
Rich Media
WWW | Camera Traps | Gallery
http://www.worldwildlife.org/cameratrap/index.cfm
Rich Media
Crittercam – Animal Pictures, Maps, Videos, Games, More
http://www.nationalgeographic.com/crittercam/missions.html
Rich Media
The Secret Lives of Wild Animals
http://www.nsf.gov/news/special_reports/animals/index.jsp
Rich Media
Conservation Education
http://www.dallaszooed.com/
Rich Media
Conclusion & Project
Conclusion
A prerequisite for learning more about animals is to find and observe them. Both art and science contribute to animal tracking. Searching for paw prints in the snow, conjecturing about damaged vegetation, and picking through scat provide clues to recent behavior and locations of animals. Different technologies are appropriate for different species. Camera traps and Crittercams can allow direct images of animals in their native habitats. Radiotelemetry and satellite tracking provide indirect real-time tracking information on both local and global scales. Combining information obtained from these techniques will help us understand the behavior and needs of individual species as well as how humans affect the delicate interaction among species.
Project
You have just returned from your expedition to locate and bring back injured animals to the zoo from the forest. Explain the type of evidence you used to track the animals and describe any animals you located.
Glossary
track - to follow a trail made by an animal
survey - detailed gathering of data and information
forefoot - front foot of a four-legged animal
hind foot - back foot of a four-legged animal
trails - paths used frequently by many animals
runs - paths used infrequently by a specific species
ghost scale sign - signs such as tracks in morning dew or leaf depressions that disappear quickly
scat - animal droppings
territorial marking - something that identifies a piece of land as belonging to an individual animal
coprophagy - animals re-ingesting their own feces to absorb more of the vitamins and nutrients
limb dominance - use of one leg (or limb) more than another; seen in the length of stride
search and rescue - operation to find a person or animal that is lost or injured in a remote area such as a mountain or forest
camera trap - camera that can be triggered to take pictures by the motion of a nearby animal
infrared detector - instrument that can detect infrared radiation and sense motion
Crittercam - research video camera that can be attached directly to an animal
animal-borne imaging - taking pictures from the perspective of the animal itself
landscape ecology - study of animals in their natural environment and the relationship among animals, the land, and people
radiotelemetry - telecommunication of information using radio waves
predation - hunting and killing other animals for food
range - geographic distribution of a particular species
habitat - place where an animal lives, often characterized by dominant plant forms or physical characteristics
territory - area that an animal defends against intruders from its own species
radio collar - collar fitted around the neck of an animal that carries a radio transmitter
tagging - to mark an animal for tracking purposes using a tag, collar, leg band, etc.
GPS (Global Positioning System) receiver - receives information transmitted from several of 24 orbiting satellites and uses it to determine position
biodiversity - number and variation of different kinds of animal and plant species
population - group of animals of identical species that occupy the same area and have the potential to interbreed
pelagic - fish and animals that live in the open sea
travel corridor - path that animals use repeatedly to travel from one location to another