Notes on Glossina fusca, Walk., in North Nyasa

Notes on walk-counting

th th 0 1 1 2 2 1 0 1 ij ij m m m m 1 Walks and graphs v e v i e v v m v j Let 0 be a nite, undirected, simple graph with vertices. We will use the notation to indicate that two v ertices and in 0 are joined by a n edge. Let be an adjacency matrix for 0. That is, is an matrix with rows and columns indexed by t h e v ertices o f 0 , a n d [ ] = 1 if 0 if We use the notation [ ] to denote the ent...

Ventilation of Lake Malawi / Nyasa

A tracer study was conducted on Lake Malawi/Nyasa, one of the deepest and largest lakes in the world, in order to quantify the renewal rates of the deep water. For this purpose, concentrations of the anthropogenic trace gas chlorofluorocarbon-12 (CFC-12) were measured in water samples which were collected in glass ampoules and analyzed by a new gas chromatographic separation method. Based on me...

Assessing mating performance of male Glossina pallidipes (Diptera: Glossinidae) using a walk-in field cage.

To monitor the quality of male tsetse for use in the sterile insect technique (SIT), a field cage test was developed and evaluated. Mating competitiveness was tested with male Glossina pallidipes Austen that emerged from pupae stored for different periods at 15 degrees C. Control males emerged from pupae stored at 23-24 degrees C and emerged at 26.5 degrees C. Each sample of test males was divi...

Notes on Lactuca saligna in Iran

In the identification process of weed materials available in "IRAN" herbarium, a specimen belonging to the genus Lactuca (Asteraceae) had the following characteristics: Plant annual, many stemmed from base; stem erect-slightly procumbent, slender, glabrous, whitish and leafy. Basal leaves dried; stem leaves ca. 7 × 0.5 cm, glabrous, linear-lanceolate, entire at margin, sessile, auriculate, auri...

Nutrient Cycling in Lake Malawi/Nyasa