A cephalometric study to ascertain the use of nasion as a guide in locating the position of orbitale as an anterior reference point among a population of South Coastal Karnataka.

Context: To ascertain the use of nasion as a guide in locating the position of orbitale as an anterior reference point in the face-bow transfer records in individuals having different facial types.

Aims: This study evaluated the distance from the nasion to the orbitale using cephalometric measurements to ascertain the use of nasion as a guide in locating the position of orbitale as an anterior reference point in individuals having different facial types among a population of South Coastal Karnataka.

Subjects And Methods: Anthropometric measurements were made on 61 subjects and they were classified into mesoprosopic, euryprosopic and leptoprosopic facial type groups based upon the prosopic index.

Indirect and mitigated effects of pulsed resources on the population dynamics of a northern rodent.

Pulsed resources have significant effects on population and community dynamics in terrestrial ecosystems. Mast seeding is an important resource pulse in deciduous forests; these boom and bust cycles of seed production generate strong lagged population responses by post-dispersal seed predators such as rodents, which then cascade through multiple trophic levels and regulate population dynamics of their predators and prey. However, similar interactions in another major pulsed system, coniferous forests, are inconsistent, and the effects of interannual variation in conifer seed production on many consumer populations are largely unknown.