Dewi M Prawiradilaga
Unknown Affiliation

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search
Journal : MEDIA KONSERVASI

Review of The Origin and Evolution of Social Signals in Ducks; in Particular The Function of Courtship Displays Dewi M Prawiradilaga
Media Konservasi Vol 2 No 3 (1989): Media Konservasi
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (876.427 KB) | DOI: 10.29244/medkon.2.3.%p

Abstract

Recently, there has been an increase in the use of behavioural characteristics, especially courtship behaviour, in evolutionary studies. This is because such behaviour is thought to be of fixed pattern and species specific.In waterfowl, the study of the courtship behaviour was pioneered by Heinroth (191 1). His study has been elaborated by Lorenz (1941). Following this, Johnsgard (1962) and McKinney (1975) also have contributed much in this field of study. In the beginning, Heinroth and Lorenz used the evolution of courtship displays in waterfowl as indicators of taxonomic relationships. Then, Johnsgard investigated the distribution of homologous display repertoires of Anatidae and found out the relationships of all species. Since then, the study has been directed towards the search forfactors which have been responsible for the evolution af spec if^ differences, such as the difference in frequency, in the order of displays linked in sequences and in the degree ofelaboration of plumage features reinforcing signal movements. As examples, Johnsgard (1960a) studied the courtship displays in North American black duck (Anas nrbripes) and mallard (Anas platyrhynchos), McKinney (1970) observed four species of bluewinged ducks (Anas cyanopteta, A. discors, A. clypeata and A. smithi) and Prawiradilaga (1985) investigated the grey teal (Anas gibberifrons) and chestnut teal (Anas castanea).So far, not all of these specific factors have been brought up.It is the aim of this review to examine and discuss aspects of evolution of courtship displays which have been presented; in particular the origin and evolutioh of social signals in ducks, especially those referred to specifically as courtship displays.
Role of Birds on Population Control of Destructive Insects Dewi M Prawiradilaga
Media Konservasi Vol 3 No 1 (1990): Media Konservasi
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (398.363 KB) | DOI: 10.29244/medkon.3.1.%p

Abstract

Approximately 331 species of birds or 67% of the total number of buds on Java island are primary and secondary insectivores. These buds were found to feed on 14 orders of insects (72%) which are potential as crop destructives. The orders of Coleoptera, Lepidoptera and of Orthoptera were eaten by more than 100 birds species. In order to promote the use of birds to control destructive- insect population, it is important to study the bio-ecology of insectivorous buds in details.
Basal Metabolic Rate and Ecology of Some Passerine Birds in Indonesia Asep S Adhikerana; Dewi M Prawiradilaga
Media Konservasi Vol 3 No 3 (1991): Media Konservasi
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (648.164 KB) | DOI: 10.29244/medkon.3.3.%p

Abstract

Although the value of basal metabolic rate (BMR) is believed to be used as a basic reference in comparing several biological aspects of birds such as morphology, phylogeny, and ecology, its relationships with these aspects is hardly discussed. The paper is aimed to analyse relationships betwen the value of BMR and ecological aspects of some families of passerine birds in Indonesia whicch include nest type, primary food, primaly habitat, stratification of living site and foraging behavior. The results indicate that nest type, primexy food and foraging behavior have aclose relationship with the value of BMR of twenty five families of passerine birds; whereas the stratification of living site separate these birds families into two groups: arboreal and terrestrial groups. However, further research is still needed to verify these results.