BIOL 2500 Lecture Notes - Lecture 7: Gerris, Allometry, Habituation

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 2500
• Professor: k

Document Summary

Individual response: responses to environmental change fall into 3 categories, developmental (years) Individual alters its development to produce a phenotype most suitable to a persistent slow change in environmental conditions e. g. wing length in european freshwater water striders (gerris spp. ) Adult lifespan is short (reproduce & die during one summer) Long winged - can fly move if pond dries up more energy into survival than reproduction. = habituation of a(cid:374) orga(cid:374)is(cid:373)"s physiologi(cid:272)al respo(cid:374)se to e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)tal (cid:272)o(cid:374)ditio(cid:374)s: acclimation applied to laboratory, acclimitization applied to nature, tolerances are not fixed but are preconditioned by recent experience with environmental conditions, e. g. Insect (cid:862)freeze a(cid:448)oida(cid:374)(cid:272)e strategy(cid:863: as temperatures start to decrease in fall convert glycogen reserves alcohol, alcohol depress the freezing point of the body freeze avoidance, freeze tolerance. Expels fluid interior of cells and controls the ice nucleation process in intercellular space. Allow their tissues to dry up when there is no available water.