![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Summary
This is a summary of the results obtained in recent years on the metabolism/temperature curves (M/T or R/T curves) of six species of freshwater invertebrates, with characteristic ecological and geographical distributions: still or running water, plains or mountainous regions. The animals are two Trichoptera larvae: Micropterna testacea GMEL. And Limnephilus rhombicus (L.), and four species of Gammaridae: Gammarus pulex (L.), G. fossarum KOCH, G. roeseli GERVAIS and G. lacustris G. O. SARS. The measurements were always taken comparatively, that is to say, in the same, strictly observed, experimental conditions. A certain number of parameters were compared: coefficient of variation of the measurements at a given point, shape of the active and resting M/T curves between 5 and 25 °C, scope for activity, maximum possible metabolic variations for a given species. Even if it is impossible to draw a model M/T curve for freshwater invertebrates in general, a certain number of M/T patterns stand out. These patterns are an intrinsic characteristic of the species, and seem to be connected to their ecological and geographical distribution. In this way zones of thermal adaptation, of tolerance and of resistance or survival may be defined.