IUCN

The threatened species categories used in Red Data Books and Red Lists have been in place for almost 30 years. The Red Data Book categories provide an easily and widely understood method for highlighting those species under higher extinction risk, so as to focus attention on conservation measures designed to protect them. This document, incorporating changes recommended by IUCN members, was adopted by the IUCN Council in 1994.

These papers seek to show how environmental economics can be brought in to assist with the design and management of protected areas.

More than 1,000 species of molluscs are threatened by habitat destruction, over-collection, or predation by alien species. The nine papers and five abstracts in this volume summarise the current status of molluscan diversity.

This account of extractive reserves in the Brazilian Amazon region provides practical examples of sustainability based on first-hand reports. The historical background is followed by examination of social organization, analyses of the economic viability of reserves, the key elements in developing an extractive reserve system, establishment of legislation in Brazil, and subsequent management. It underlines the importance of community involvement.

In recent years the trade in tortoises and freshwater turtles of Southeast Asia has escalated and changed dramatically to meet international demand. This report documents the change, examining the status, distribution and exploitation of 41 species in seven Southeast Asian countries.

Written by teams from the two countries, this report presents an integrated picture of the environmental features of agriculture and the accompanying threat to biodiversity, supported by data related to the entire territory of the former Czechoslovakia. A valuable guide to agricultural policy makers and nature protectors even in an era of rapid change.