The application of Bergmann's and Allen's rules to the poikilotherms
In addition, shrimp of all stages at any location and time are subject to the same temperatures, arguably the second most-important modifier of growth rates (after food availability) in poikilotherms
with low body temperature typically possess enzymes that are less rigid and thermally stable than those from warm-adapted species.
The effect of temperature changes on the activity of poikilotherms
Responses of vertebrate poikilotherms
Since fish are poikilotherms
, it ispossible that warmer temperatures will denature andinactivate AChE.
1-Temperature: All fishes are poikilotherms
('cold blooded') and are very susceptible to changes in their external environment.
Because fish are poikilotherms
and because CyHV-3 only affects fish when the water temperature is 18[degrees]C-28[degrees]C, the effect of temperature on CyHV-3 replication growth in vitro has been investigated.
One approach to this question would be to consider that many sit-and-wait predators are poikilotherms
, for which the energetic demands of active hunting would likely negate any benefit derived from that energy-expensive activity.
Paleontologists long have known of a rough correlation between a period or epoch's temperature and the size of its poikilotherms
Owing to its multiple effects (Fry 1947) on poikilotherms
such as fish, temperature has been termed the abiotic master factor (Brett 1971).
According to Sharpe & DeMichele (1977), extreme temperatures affect the catalysis of enzymes involved in the development of poikilotherms