... with photosynthesis and photochemical efficiency ( F v /F m ) of Breviolum psygmophilum photosymbionts were measured. Thermal performance curves (TPCs) of respiration revealed a pattern of countergradient variation with RI corals exhibiting higher respiration rates overall, and specifically at 6, 15, 18, 22 and 26°C...

... in metabolic rates (metabolic cold adaptation). However, there was a countergradient variation (CnGV) for growth rate in which the highest latitudinal population exhibited greater growth rates than their counterparts from lower latitudes. Surprisingly, this CnGV pattern was accompanied by a lower apparent dry...

... is/is not limited primarily by cardiac output and locomotor muscle blood flow . J. Appl. Physiol. 100 , 2099 . Conover D. O. , Schultz E. T. ( 1995 ). Phenotypic similarity and the evolutionary significance of countergradient variation . Trends Ecol. Evol. 10 , 248 - 252 . Costa L...

...Melissa A. Storm; Michael J. Angilletta, Jr SUMMARY Selection for rapid growth and development in cold environments results in a geographic pattern known as countergradient variation. The eastern fence lizard, Sceloporus undulatus , exhibits countergradient variation in embryonic growth...

... countergradient variation similar to that in other taxa( Feder and Hofmann, 1999 ; Ulmasov et al., 1992 ; Zatsepina et al., 2001 ); i.e. the magnitude and threshold for traits correspond to the thermal environments in which the species occur. Thus, the lower-latitude species D. virilis exceeds the higher...