5 Written questions
5 Matching questions
- Division of Labor Among Specialists
- Inbreeding effects depend on
- Most of what is known about homing comes from studies on what species?
- Migration new info
- Groups with female dispersal
- a This feature is rare in mammals and is found only in naked mole rats.
- b The ultimate effects of inbreeding depend on past population
size and mating patterns
- c Used to be defined by round trip but now one-way travel also counts
- d Pikas,kangaroo rats, chimpanzees, African wild dogs and whitelined
- e Birds but enough has been done on mammals to show that they
use the same mechanisms. Most mammal research has been done on bats and mice.
5 Multiple choice questions
- males of polygynous species have hippocampi that were 11% larger than females whereas in monogamous species the difference was only 2% (no data for humans).
- Choice of a habitat may be limited by:
• accessibility (islands versus mainland)
• behavior patterns (i.e., prefer trees to grasslands)
• allelopathic agents (plant toxins)
• abiotic factors (temperature, moisture, light, nutrients)
- predators could approach within 3 m of solitary individuals but no closer than 300 m to grouped individuals before waves of alarm calls swept through the colony
- three types of mice:
1) Wild caught in grassland
2) Offspring of wild-caught parents
3) Grassland mice reared in the lab for 20 generations
- A group of individuals of the same species that is organized in a cooperative manner, extending beyond sexual and parental behavior.
5 True/False questions
Inbreeding Depression → It manifests itself through reduced reproductive success and
survival of offspring from closely related parents compared to
offspring of unrelated parents.
It is caused by increased homozygosity of the inbred offspring
and the resulting expression of deleterious recessive alleles.
What causes marine mammal strandings? → Many marine mammal
strandings have been associated with changes in the earth's
magnetic field possibly due to solar flares or areas of magnetic
Magnetic Compass → Many organisms use geomagnetic cues. Marine Species follow the magnetic lineation in the seafloor, which are predominantly north-south. Other lineations oriented primarily east-west intersect these
north-south lines; these east-west lines correspond to fracture zones
across the spreading ridges
Reason for dispersal (reduce Competition) → males leave (usually
before 4 years old), to become nomads or form coalitions that take
over new prides. Competition with other males is important as
most departures occur when a new coalition takes over. Some
males do leave voluntarily.
Talus → isolated patches of rock debris