| species limits and phylogeography of north american cricket frogs (acris: hylidae). | cricket frogs are widely distributed across the eastern united states and two species, the northern cricket frog (acris crepitans) and the southern cricket frog (a. gryllus) are currently recognized. we generated a phylogenetic hypothesis for acris using fragments of nuclear and mitochondrial genes in separate and combined phylogenetic analyses. we also used distance methods and fixation indices to evaluate species limits within the genus and the validity of currently recognized subspecies of a. ... | 2008 | 18462953 |
| ontogenetic body form changes in three ecological morphotypes of anuran tadpoles. | metamorphic vertebrate species are of particular interest in ecological and evolutionary studies because the decoupling of larval and adult growth patterns potentially allows adaptive diversifications of the separate stages. larval and adult growth might be much more constrained if allometric patterns were constant throughout ontogeny. to better understand how differential growth patterns might contribute to tadpole diversification, we have analyzed growth allometries in relation to interspecifi ... | 1992 | 1601574 |
| artificially induced metamorphosis acetone in acris gryllus. | | 1988 | 3408264 |
| extraoptic celestial orientation in the southern cricket frog acris gryllus. | celestial orientation and setting of the biological clock in the southern cricket frog acris gryllus can be cued by light stimuli received by extraoptic receptors in the brain. these extraoptic photoreceptors may also be used in learning new orientational directions. a mechanism for a light-activated biological clock is discussed. | 1970 | 5435900 |
| a preliminary investigation of color discrimination in the florida cricket frog. acris gryllus dorsalis (harlan). | | 1948 | 18901919 |
| urbanization interferes with the use of amphibians as indicators of ecological integrity of wetlands. | 1. wetlands are ecologically and economically important ecosystems but are threatened globally by many forms of human disturbance. understanding the responses of wetland species to human disturbance is essential for effective wetland management and conservation. 2. we undertook a study to determine (i) whether anurans can be used effectively to assess the ecological integrity of wetlands affected by groundwater withdrawal and, if so, (ii) what effect increasing urbanization might have on the uti ... | 2012 | 32367892 |