Lecture 6 Flashcards
Heat shock proteins
proteins produced in response to heat
Heterothermic
animals that can switch between poikilothermy and homeothermy
Frenetic movement
the constant locomotion of larvae in the mass, and high metabolism linked to digestion
Behavioural avoidance
options available for avoidance of temp. extremes, and in situ tolerance (survival in altered psychological condition)
what are the 2 processes used for freeze avoidance
- lowering overall water content of extracellular fluids (induced dehydration)
- removal of ice nucleating agents from fluids prone to freezing
What is a method of removing ICNs
purging gut prior to low temp arrival
antifreeze proteins
used to prevent expansion or further crystallization of ice crystals that already formed
Rapid cold hardening
brief low exposure to a nondamaging low temo acclimates the insect to subsequent exposure to cold temp
Fog basking
cold oceanic currents produce fog which provides mositure for beetles that present in a head down stance
What 5 points does migration also include
- persistent movement away from an original home range
- relatively straight movement in comparison with straight tendinf or zigzagging within a home range
- undistracted by stimuli from home range
- distinctive pre and post movement behaviours
- reallocation of energy within the body
what are the types of migration
seasonal, reproductive, irruptive and nomadic
What is seasonal migration
occurs with change of seasons
what is reproductive migration
to or from breeeding locations
whatis irruptive migration
occurs unpredictably and may not involve entire pop
what is nomadic migration
involves progressive movement away from home range but not to a soecific alternate location
