Lecture 12 Flashcards
(27 cards)
What kind of crickets were used in lab?
House Crickets; Acheta domesticus
Is there true copulation between crickets?
No
How does the semen in males work?
Males package semen in a packet, spermatophore that is manipulated by cerci
Female mounts the male or male mounts the female?
Female mounts the male
(Tinbergen’s 1963 Four Questions) The four main areas of behavioral research are…
Causation, Development, survival Value, Evolution
Which area(s) of behavioral research is/ are proximate mechanism(s) and which is/ are ultimate mechanism(s)?
Proximate = Causation and Development Ultimate = Survival Value and Evolution
Dominance Hierarchy based and maintained on…
his/her strength and influence over other individuals
Competitor’s strength evaluated through…
ritualized behaviors and displays that flaunt their size, songs, endurance, strength, and displays of color
What are the costs and benefits of dominance behavior?
reduce chances of injury over fights for resources
Cost to the submissive members is less access to resources
In regards to females, when males are assessing each other’s rank in a dominance hierarchy…
they may be trying to influence a female’s mate choice
What is intrasexual selection?
dominance struggle between males
What is intersexual selection?
competition to attract females
Patterns of male success include
dominant males enjoy mating advantage
male mating success unrelated to dominance
subordinate males enjoy a mating advantage
Aggressive behaviors in crickets include…
chirping, wing flaring, avoidance, biting, pushing, wrestling, and guarding
Courting behaviors in crickets include…
antenna stroking, chirping, following, guarding
The insect nervous system is organized into
segmental ganglia: ventral nerve chord
Three phases occur during an action potential
depolarization, repolarization, after-hyperpolarization
Any action or display by one animal - the ____ - that functions as a signal and affects the current or future actions/displays of another animal - the _____
sender; receiver
Where are the ears on a cricket?
on their forelegs just below the knees
Crickets are tuned to a…
species-specific syllable repetition rate
Cricket auditory interneurons that transmit the sound signal to the brain
omega neurons and ascending neurons
the instantaneous discharge rate of the neuron are ____ when short sound pulses are repeated at ____ repetition rates
low; high
the instantaneous discharge rate of the neuron are ____ when the beginning sound pulses match the duration of the species-specific sound pulses
high
Who else is listening to cricket song?
The parasitic fly Ormia ochracea depositing eggs on a male cricket.
