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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.
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 (cold-blooded creatures).
Owing to its multiple effects (Fry 1947) on poikilotherms such as fish, temperature has been termed the abiotic master factor (Brett 1971).