Navigation and Senses
Combined with a compass, this two-part Earth feature, inclination and intensity, lets sea turtles tell locations apart.
What is the magnetic field?
This type of migration is the result of different species fighting over limited resources.
What is Competition?
This type of animal migrates across the Serengeti and consumes large portions of grass
What are Wildebeest?
This is a persistent, directed form of animal movement.
What is migration?
Some animals rely on this natural feature of Earth to help navigate during long-distance migrations.
What is Earth's magnetic field?
In planetarium experiments, birds learned to orient using the pattern of these, rotating around a point near the North Star.
What are stars?
In the Serengeti, this migrating species benefits from the regrowth of wildebeest grazing, demonstrating facilitation.
What are Thomson's Gazelles?
This is the type of plant did the Wildebeest eat
What is grass?
Unlike foraging, migrating animals may temporarily ignore these two things.
What are food and other resources?
These three animals were studied in the Serengeti to understand why they migrate through similar areas at different times.
What are zebras, wildebeests, and Thomson's gazelles?
Salmon returning to their home stream are thought to rely on this sense to detect chemical signatures unique to the water where they hatched.
What is smell?
The rainfall and plant growth leads to this result between two competing species.
What is decreased competition of resources?
This happened to the grass after the Wildebeest grazed the area
What is regrowth/increased biomass/increased/nutrient density?
Migration begins as a behavior at this level before affecting entire populations.
What is the individual level?
Researchers used these two technologies to track animal migration in the Serengeti.
What are GPS tracking and camera traps?
Some scientists believe that migration patterns are an extension of ______ behaviors?
What are early life and learned routine behaviors?
Increased competition between two species in extreme cases can lead to these effects.
What is speciation, adaption, or extinction?
This herbivore benefits from the nutrient dense vegetation created by wildebeest grazing
What are Gazelles?
This evolutionary process allows beneficial migratory traits to become more common over generations.
What is natural selection?
Although migration can affect food webs and population regulation, the presentation emphasizes that migration does not automatically make an animal this type of species.
What is a keystone species?
Light-sensitive proteins in the eye called these are leading candidates for how birds sense Earth’s magnetic field.
What are cryptochromes?
This type of competition occurs when migrating species and resident species compete over the same food sources.
What is interspecific competition?
This is the ecological term for when one species improves environmental conditions for another species?
What is facilitation?
These three factors interact to influence migration patterns: an animal's genes, its migratory traits, and this external factor.
What are environmental conditions?
McNaughton's researchers monitored changes in grazed vegetation over this many days.
What is 32 days?