Notes taken by Dr Balko during lecture.
Routine Class Matters ~
Reading assignments for Today
Chp 35, thereafter Ch 36 and 37.
Prelim II results will be posted on BLACKBOARD by tomorrow.
Summary slide of the 5 questions of behavior.
Foraging behavior of Jaguars… [Figure 37.12D]
Given the following characteristics of the
following two prey species, we see that predation has potential costs that trade-off with the
• Nine-Banded Armadillos, only about 5kg of food for the Jaguar, are
abundant and easy to catch
• 200 kg Baird’s Tapirs are less abundant and run quickly
• To forage optimally, a jaguar can do better by searching for armadillos,
long as they are common
, and eating tapirs if it happens on a good
• So, what are the potential
of foraging behavior?
(ppt) Clicker Question.
Which of the following would you expect to be true of a specialized carnivorous mammal
that eats only rare, relatively large, aggressive long-horned cattle?
(a) High search costs, high risks, high pay-off per item
(b) Low search costs, low risks, low pay-off per item
(c) High search costs, low risks, low pay-off per item
(d) High search costs, high risks, low pay-off per item
(e) Low search costs, low risks, high pay-off per item
Answer = a
Social behavior &
Sociobiology ~ read about this in the text
[Figure 35.13 –
mouth brooding fish]
• Mating behaviors obviously enhance reproductive success, and mating systems
promiscuous, monogamous, or polygamous
studies social behavior, the interactions of two or more animals, in
an evolutionary sense
• The needs of offspring and certainty of paternity help explain differences in
mating systems and parental care by males