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1973 iucn yearbook

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years, and has sponsored regular meetings of polar bear scientists at<br />

which cooperative research and management programmes are worked<br />

out. The Agreement requires ratification, approval or accession by three<br />

states before it will enter into force. In practice, however, many of its<br />

features have already been put into effect.<br />

Red Data Book<br />

Accumulation and evaluation of data on threatened species is an<br />

essential operation in planning priorities and strategies, and in this<br />

effort production of the Red Data Book is of first importance. Heretofore,<br />

five volumes have been published, each dealing with a major group<br />

of endangered species.<br />

In early <strong>1973</strong> a comprehensive revision of Volume 1, Mammalia, was<br />

published. The revision involved a recasting of the format of the data<br />

sheets, adoption of redefined categories of threatened species, and<br />

introduction of data sheets for species in the "vulnerable" class.<br />

A similar revision of Volume 2, Aves, was undertaken by Warren B.<br />

King for the International Council for Bird Preservation (ICBP) and it<br />

is hoped this will be ready for issue in 1974 or early 1975.<br />

The compiler of Volume 3, Amphibia and Reptilia, René E. Honegger,<br />

is currently working with the Secretariat on the preparation of revised<br />

data sheets in the new format. It is expected that this revision also will<br />

be ready issue next year.<br />

Following discussions with the compiler of Volume 5, Angiospermae,<br />

Ronald Melville, it has been decided to adopt a different approach and<br />

to substitute for that volume a Red Data Book Volume on plants.<br />

Instead of issuing a data sheet for each species, separate compilations<br />

listing threatened species of plants in a specific area, together with notes<br />

relating to conservation action needed, will be prepared. In addition it<br />

is proposed occasionally to prepare a compilation dealing with the<br />

threatened members of a family or other natural group of plants.<br />

Approaches have been made to a number of specialists in various<br />

parts of the world, and it appears that a much larger effort in compiling<br />

these volumes will be feasible. Several units in the new format are<br />

currently being prepared.<br />

Primates<br />

A meeting of invited experts to define action priorities and plans for<br />

primate conservation was hosted by the Medical Research Centre,<br />

79

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