Current evidence suggests that Europe's dolphins in the 1990s require urgent action to conserve them. This paper reviews the nature of the threats to these animals and outlines some measures designed to help counter them.

Wild animals are an important source of protein for the rural peoples living in or near tropical forests. However, the resource can easily be overexploited and game species can become locally depleted, or even extinct. This paper discusses attempts to measure the sustainability of hunting in tropical forests. It examines five indices of sustainability in current use and two models that attempt to model sustainability.

The saiga antelope is exploited principally for its horn. Two major factors will influence the manager's decision about the best sustainable hunting strategy for the saiga: the climatic unpredictability of the region in which it lives and the effects of highly selective hunting for males on the population dynamics of the species. This paper discusses these factors and assesses the prospects for sustainable management of the saiga.

Sabah is faced with a problem of small groups of orang-utans isolated from their parent populations in fragments of secondary forest, mainly on oil-palm plantations. The Wildlife Department has recently captured 84 such animals in three locations and translocated most of them to Tabin Wildlife Reserve, which already has a low-density population of orang-utans. The majority of animals were captured by drug immobilization, using a 5:1 ketamine/xylazine mixture at a mean dosage of 8.47 mg/kg body weight (range 3.76–22.64 mg/kg). This proved an effective and safe method. Others, mainly immatures, were captured manually. Few injuries or other problems were encountered. The cost of the rescue operations was $US175 per animal. A satisfactory way of monitoring the released orangutans is under development.

Biological studies in Guinea have been very patchy, leaving much of the country almost unsurveyed. In 1992 the Fauna and Flora Preservation Society funded a 10-day field visit to Kounounkan, a relict forest at the northern edge of the Upper Guinea Forest Block. The survey found a variety of habitats and high biodiversity, including two vulnerable and one endangered species. Hunting pressure appears to be low and the site is very well suited for the development of further conservation initiatives.

A community-based conservation scheme on the upper catchment of the Kairezi River, eastern Zimbabwe, has been based on financial returns from trout fishing. Despite consistent stocking, trout catches have been declining, which undermines the justification for conservation. Fishery managers believed that Cape clawless otters Aonyx capensis preyed on trout and competed with them for food. An analysis of otter and trout diets in 1993 indicated that this was not the case and the otter was not the cause of the lack of trout. The future of the scheme and the conservation of otters in the catchment are more likely to be threatened by poaching and uncontrolled agricultural activities.