Class Notes (836,673)
Canada (509,870)
Biology (2,156)
BIO318Y5 (33)
Lecture 7

2nd half Lecture 7

2 Pages
Unlock Document

Darryl Gwynne

Lecture 7 Dimorphism in horn size & concomitant mating tactics in dung beetles The horn type of a male is conditional not only on its own body size, but also on a cue of the level of sexual competition that the larval male is likely to encounter as an adult Because dung quality is predictable, being high when fruit is a large part of the monkey diet, male beetles can vary their development adaptively. When the quality of dung eaten is high, male larvae of a certain body size are more likely to mature hornless because the high-quality food signals that the population-wide body size of rival males will on average be higher. Quantity of food (random) + quality (predictable) => decides how the male beetles will develop. The Stalk-eyed fly male grows eyes on very long stalks to impress the females. Sexual dimorphism. Has costs to males! Tropical: found in groups on plants. Genes and individuals can be in conflict. Mate Choice and Levels of Selection goods or services -> females want for direct benefits good genes -> good for the offspring superior quality compatibility -> no inbreeding runaway issues-> not want male to run away
More Less

Related notes for BIO318Y5

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.