environment
TRANSCRIPT
What is environment?• a : the complex of physical, chemical, and biotic factors (as climate, soil,
and living things) that act upon an organism or an ecological community and ultimately determine its form and survival b : the aggregate of social and cultural conditions that influence the life of an individual or community
Effects of Prenatal Stress
• The number of stress receptors in the brain and their activation profiles may be determined in the embryo
• So how you respond as an adult to stress may be determined quite early on
Experimental Design
•Collect embryos daily
•N =12 pairs at start
•Served as LD controls throughout experiment
LD Control LD SD SD LD
0h 0800h 1800h 2400h0h 0800h 2400h
0h 0800h 2400h
16L:8D12 days 33 days 20 days
•Collect embryos daily
•When egg laying stopped, N =6 males sacrificed
•GSI determined
•TN-GnRH neuron electrophysiology recorded
•Collect embryos daily
•When egg laying reached control levels, N =6 males sacrificed
•GSI determined
•TN-GnRH neuron electrophysiology recorded
Social
• Social environment is very important– Fish that change sex when other fish act like it is
male/female; queen bee; naked mole rat roles; monogamy• How does social environment shape us?• How is this different now?• How do social networking sites alter society?• Twitter campaign in the middle east• Elections? Democracy?• What about friendship – has the word been redefined?• What is privacy?
Social regulation of GnRH• Cichlid fish (Haplochromis burtoni)• Social factors growth and reproduction
How our environment affects us
• Development• Adaptation• Habituation/Facilitation• Social Responses• Evolution