Evolution des dépenses énergétiques chez le rat Zucker au cours de la première semaine de la vie. Effet de l'heure des mesures

摘要: Gas exchanges were measured in 2, 5 and 7-day old fa/fa Fa/fa rats for two hours (10.30-12.30 h) at five different temperatures: 35, 33, 30, 28 26 degrees C. In 2-day pups, no significant difference between genotypes was found either temperatures. At the age of 7 days, gas significantly lower than but only temperatures below 33 These results differ from those a previous study where afternoon (16.30-18.30 (Planche Joliff, 1985). Thus, our findings show that very early life there are diurnal variations level according to genotypes. Consequently, estimation deficit energy expenditure observed present during first week should be modulated emphasis laid on effect hour measurement, even days life, result metabolic studies.