Podcast
Questions and Answers
What is the primary factor that differentiates migrating and non-migrating individuals within a species?
What is the primary factor that differentiates migrating and non-migrating individuals within a species?
- A physical barrier such as terrain
- A selection process (correct)
- Random chance
- Availability of food resources
Which of the following is NOT identified as a main challenge faced by long-distance migrants?
Which of the following is NOT identified as a main challenge faced by long-distance migrants?
- Finding food (correct)
- Orientation
- Navigation
- Maintaining direction
Which of the following environmental cues is NOT typically used by migrants for navigation?
Which of the following environmental cues is NOT typically used by migrants for navigation?
- Moon phases (correct)
- Skylight polarization patterns
- Sunset
- Geomagnetic field
What is the primary function of the mental map used in bicoordinate migration?
What is the primary function of the mental map used in bicoordinate migration?
Besides environmental cues and a mental map, what is another factor that influences migratory direction?
Besides environmental cues and a mental map, what is another factor that influences migratory direction?
Flashcards
Partial Migration
Partial Migration
A process where only some individuals in a population migrate, creating a split between those who do and don't.
Orientation
Orientation
The ability to determine and maintain the correct path during migration.
Navigation
Navigation
The ability to identify a specific location and travel towards it during migration.
Mental Map
Mental Map
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Genetic Determination of Migratory Direction
Genetic Determination of Migratory Direction
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Study Notes
Partial Migration
- Partial migration is a selection process that divides migrating animals from non-migrating animals.
- Timing of migration is also affected by selection.
- Long-distance migrants face challenges.
Orientation and Navigation
- Orientation is the process of determining and maintaining a proper direction.
- Navigation is the process of finding and moving towards a particular location.
- Animals can use various cues to navigate, such as the sun, stars, skylight polarization patterns, sunsets, and the geomagnetic field.
- Creating a mental map aids in navigation.
Bicoordinate Migration
- Bicoordinate migration uses a type of mental map with environmental gradients to determine direction.
- One gradient indicates north-south direction, and another indicates east-west direction.
- Migratory direction is also influenced by genes.
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