NCBI Bookshelf. Are morphology-performance relationships invariant across different seasons? In particular, by noting whether males and females in different ecological contexts compensate for poor maximum laboratory locomotor performance by moving at close-to-maximum locomotor capacity Carrier ; Irschickone is able to environmental sex determination in reptiles of arizona in Garland in which context selection is likely to be important for each sex Irschick ; Husak and Fox A further impediment to our understanding of the ecological relevance of dimorphisms is the lack of data pertaining to ecological performance in males and females.
Embryos in the fast lane: hightemperature heart rates of turtles decline after hatching. Am Zool 20 : — Glob Change Biol 14 : —
Sexual dimorphism in one important locomotor ability therefore does not necessarily imply dimorphism in others. Environ Biol Fish 58 : — Behavioural plasticity may compensate for climate change in a long-lived reptile with temperature-dependent sex determination.
Sexual dimorphism in steppe tortoises Testudo horsfieldii : influence of the environment and sexual selection on body shape and mobility. Indeed, coadaptation between preferred or selected T b and temperature-sensitive behavior is expected to be of central importance in thermal ecology Huey and Bennett ; Angilletta et al.
The consequences of TSD on fitness, or reproductive success, are largely unknown. Amphibian and reptile populations respond strongly to changes and variability in air and water temperature, precipitation, and the length of time and seasonality of water presence hydroperiod of their environments Cary and Alexander Temperature-Dependent Sex Determination in Reptiles The sex of a reptile embryo partly results from the production of sex hormones environmental sex determination in reptiles of arizona in Garland development, and one such process to produce those hormones depends on temperature of the embryo's environment.
The results, which found evidence of TSD in four out of five species, confirmed that some vertebrate species exhibit TSD. Charnier published her results in the meeting records of the local Society of Biology in West Africa, a journal with limited distribution, and her efforts were not widely recognized for several years.
Warner and Shine used hormonal manipulations to produce males and females across a range of temperatures in a species with TSD.
Thus, although the overall performance sensitivities to T b are similar in males and females, T b does appear to have different effects on how males and females jump. Cullum, personal communication. Population growth of Anagasta kuehniella Lepidoptera: Pyralidae at constant and alternating temperatures.
Donovan Kilby and Davina Kumar helped to care for eggs and measure heart rates. Locomotor impairment of gravid lizards: is the burden physical or physiological? After measurements at each temperature, the eggs were returned to their incubation containers and placed in the incubator that maintained their daily cycle of temperature.