... mice; female offspring previously experiencing high temperatures have a significant fitness disadvantage. Hot temperature Heat dissipation limit Lactation Offspring Reproductive performance Swiss mice Life on Earth is facing increasing temperatures and increasing variability...

...James K. Kagya-Agyemang; Lobke M. Vaanholt; Catherine Hambly; Elzbieta Król; Sharon E. Mitchell; John R. Speakman ABSTRACT Maximal animal performance may be limited by the ability of an animal to dissipate heat: the heat dissipation limitation (HDL) theory. Because the incidental heat produced...

...., 1990 ; Sadowska et al., 2013 ) suggests that limits are imposed by the uptake capacity of the alimentary tract. The ‘peripheral limitation hypothesis’ ( Hammond et al., 1996 ) posits the limit resides in the capacities of the tissues where the energy is expended. The ‘heat dissipation limit (HDL...

... these data, it has been suggested that SusEI may be limited by the capacity of the female to dissipate body heat – the ‘heat dissipation limit (HDL)’ theory ( Speakman and Król, 2005 ; Speakman and Król, 2010 ). Under the HDL theory, cold exposure resulted in a relaxation of the limitation on the heat...

...Elzbieta Król; Samuel A. M. Martin; Ilpo T. Huhtaniemi; Alex Douglas; John R. Speakman SUMMARY It has been proposed that the performance of lactating animals is limited by the capacity of the female to dissipate body heat – the heat dissipation limit (HDL) theory. This theory predicts that milk...

...T. G. Valencak; K. Hackländer; T. Ruf SUMMARY It has been suggested that maximum sustained metabolic rate (SusMR) in mammals as reached, for instance, during lactation, is due to a limited capacity for heat dissipation. Here, we experimentally tested whether heat dissipation limitation (HDL) also...

... or extrinsic limits to SusEI at peak lactation and provide strong support for the heat dissipation limit hypothesis. More generally, we see many situations where heat dissipation may be a previously unrecognised factor constraining the evolution of endothermic animals – for example, the latitudinal...

... limitation hypothesis. Here, we present a novel hypothesis that the limits to sustained energy intake at peak lactation are imposed by the capacity of the animal to dissipate body heat generated as a by-product of processing food and producing milk. To test the heat dissipation limit hypothesis we challenged...

... temperatures, while the heat dissipation limit hypothesis predicts a decline in milk energy output as temperature increases. Since estimates of milk energy output in small mammals can vary depending on the calculation method used, we evaluated the milk energy output of mice ( N =24) using four different...

... had substantially larger mammary glands than mice at 21°C or 30°C (2.450 g, 1.115 g and 0.956 g dry mass, respectively), which argues against the peripheral limitation hypothesis and is consistent with the heat dissipation limit hypothesis. In addition, cold exposure resulted in greater masses...