The effect of environmental temperature on the production of ultrasounds by isolated non-handled albino mouse pups

摘要: Albino mouse pups develop homoiothermy during the first 19 days of their life and show three distinct stages this period. From day 1 to 6 they are almost completely poikilothermic at low ambient temperatures; from 7 14 or 15 is a transitional period which medium temperatures (e.g. 22°C); 16 20 final stage when very developed. These changes closely correlated with in ultrasounds produced by isolated within Thus acoustic response cold weak 5 strong 12 13, on exposure even temperatures. onwards progressively stop producing depending temperatures, there complete cessation calling after as 2°C. In general, decreasing increases rate intensity but have an inhibiting effect 2–3°C breathing cease time varies age pups.