Computer Aided Interactive Classification and Mapping of Aquatic Areas

Classification and mapping of aquatic vegetation is an important task in limnology. In this paper we will present a new computer aided and interactive method for this purpose. It is similar to older techniques in that the classification relies on the judgement of the human eye. The precision is increased by using a linear diode array scanner and the evaluation times are reduced by introducing computer vision techniques. Combining these in an interactive environment gives the operator a powerful tool for the classification. The results from a mapping of aerial infrared colour photographs will be presented.     

Partitioning the effects of secular trend and ageing on adult stature

A group of 16 captive-born hairy-faced, white-lipped, black-mantled tamarins, Saguinus nigricollis, were observed from birth to maturity. The data for the parameters, body weight, head-body length, right foot length and dental eruption age was recorded at monthly intervals. Linear growth was complete at approximately 12 months of age. Body weight reached the level of the wild-caught parents at 16 to 17 months of age. Deciduous dentition was complete at eight weeks of age and all permanent teeth were present by 41 weeks of age. While this sampling is too small for statistical verification, the data provides guidelines on the parameters recorded.     

Evidence of X-linkage of tibial length and body length

Sister-sister, brother-brother and sister-brother similarities in both tibial length and stature from one month through 10 years are in accord with the hypothesis of partial X-linkage, they reject the hypothesis of selective inactivation of an X chromosome, and they indicate that the complex that is body length is suited to simplistic analysis.