ENVIRSCI 214 Lecture 6: Env sci 214 2:3:17
14 Feb 2017
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Lengthy torpor- seasonally dependent hibernation (winter) / aestivation(summer) Torpor can occur for low/high temp, desiccation, hunger. Desiccation- lack of water- found in drought conditions. During torpor- low rates of metabolism, heart beat, and respiration. (energy conserved through reduction of metabolic rates) Ectotherm- body heat derived from the environment- reptiles, amphibians, fish, insects. (most lack the physiological means to generate heat) tegu lizard- escaping domestic households and making populations in florida. Moth thorax achieves fast, powerful flight by warming up its muscles by shivering. Ectotherms- dark color increases heat gain, basking in sun burrowing seeking shade, adjust periods of being in the sun. The blue butterfly example- the soil (cid:449)ould(cid:374) t (cid:449)ar(cid:373) up fro(cid:373) the grass (cid:271)ei(cid:374)g too lo(cid:374)g, killi(cid:374)g off the ants and in turn, the blue butterfly as well once the ant food source was gone. Some amphibians will simply freeze and shut down their heart and organs completely in torpor without destroying their cell structure.
