Selected Abstracts 147

tion and documents the subsequent establishment of the new population. Seychelles warbler will soon no longer be a globally threatened species. -from Authors

92Z/00020 The Seychelles paradise flycatcher Terpsi- phone corvina on La Digue: population size, habitat requirements and management options J. Watson, Bird Conservation International, 1(2), 1991, pp 107-122. The population on the western plateau has changed little in 10 yr, with o n e p a i r less but more individuals; there has been a small (<5%) decline in preferred breeding habitat. The number of pairs using the special reserve was unchanged from 1978. The carrying capacity is small (c6 pairs). Only one significant trend was isolated in an inves- tigation of ten habitat variables, suggesting that more birds occurred where trees were larger. The reserve boundary should be redrawn to include a significant part of the main freshwater marsh. -from Author

92Z/00021 Gentle giants: the gray whale 's r emarkab le recovery from the br ink of extinction B. Obee, Canadian Geographic, 110(6), 1991, pp 22-30. In 1946 Eschrichtius robustus was protected and by the 1970s the population had increased to >10 000.

-R.C.Medler

922;/00022 Application of the experimental population designation to recovery of endangered red wolves W . T . Parker & M. K. Phillips, Wildlife Society Bulletin, 19(1), 1991, pp 73-79. In 1982 Congress amended the Endangered Species Act to allow introduced populations of endangered species to be designated experimental. The utility of the experimental designation was tested by a project to introduce endangered Canis rufus to the Alligator River National Wildlife Refuge, NE North Carolina. Because population viability analysis indicated animals chosen for introduction were not essential to the continued survival of the species, the introduced population was further classified as nonessential. -from Authors

92Z/00023 Race against time R. McKie, Green Magazine, 2(5), 1991, pp 26-30. Presents the debate between 'hightech' and 'low tech' zoologists over the best method of improving the poor reproductive success of the cheetah Acinonyax jubatus. The former favour large-scale use of invasive in-vitro tech- niques on captive animals while the latter believe better management of the animals and knowledge of their behaviour would have the desired effect. They aim to have a stock of captive cheetahs to re-stock rapidly declining wild populations. -M.Dean

92Z/00024 Feral horse fertility control: potential and l imitations R . A . Garrott, Wildlife Society Bulletin, 19(1), 1991, pp 52-58. A deterministic age-structured model was used to simulate feral Equus cabaUus populations with annual growth rates varying from 5-20%. Fecundity was decreased by model- ing mare contraception with life spans of 3, 5, and 10 yr. Results of the simulations indicate that contraceptive pro- grams could substantially reduce population growth rates. Cessation of growth in populations with initial annual

growth rates of >15% was not possible without a con- current removal program. -from Author

Regional 92Z/00025 Restorat ion of a wildlife sanc tuary in an urban setting P. F. Rice, Journal of Arboriculture, 17(1), 1991, pp 21-25. Coates Paradise has been designated by the Province of Ontario as an Area of Natural and Scientific Interest and a Class 1 wetland, and an Environmentally Sensitive Area within the Regional Municipality of Hamilton-Wentworth. The Royal Botanical Garden's Board has adopted a p r i - mary po l i cy objective to manage the area as an uman wildlife sanctuary and to promote strategies that would sustain and enhance the diversity of the habitats.

-from Author

92Z/00026 Phoenix from the ashes S. Fuller, Geographical Magazine, 63(3), 1991, pp 8-10. Outlines the controversy and subsequent effects of the forest fire that swept through a lmnstha l f of Yellowstone National Park in 1988. The current state of forest regen- eration is examined in the light of the let-it-bum policy.

-R.C.Medler

92Z/00027 Evaluat ing wetland losses with hydric soils K . K . Moorhead, Wetlands Ecology & Management, 1(3), 1991, pp 123-129. Soils were digitized from county soft surveys and wetlands were digitized from National Wetlands Inventory maps for two adjacent coastal counties in North Carolina. Wetland losses since settlement were calculated to be 65% for Washington County and 38% for Tyrrell County. Wetland losses for both counties occurred primarily on mineral hydric soils and the current wetlands distribution well with the distribution of organic soils. -from Author

92Z/00028 Back for the future C. Norris, Green Magazine, 2(6), 1991, pp 16-20. Discusses the pros and cons of reintroduction of extinct native species into Britain. -M.Dean

92Z/00029 Effects of common proper ty resource utili- zation on wildlife conservation in Nigeria G.J . Osemeobo, Gee Journal, 23(3), 1991, pp 241-248. Wildlife was managed through traditional regulations to meet subsistence requirements for food, income, recreation and health care, but the conditions under which common property resource utilization thrived were almost disin- tegrated by changes in land use and social attitudes.

-from Author

92Z/00030 Conservat ion and management of the r ivers of the Kruger National Pa rk : suggested methods for calculating ins t ream flow needs J. O'Keeffe & B. Davies, Aquatic Conservation, 1(1), 1991, pp 55-71. Describes the development of initial protocols for the assessment of instream flow needs for the Luvuvhu and Sahie Rivers. The proposed impoundment and agricultural development of the Sahie River, in particular, is an inap- propriate use of this unique resource, and the catchment would be more advantageously developed for tourism, recreation, and nature conservation. -from Authors

92Z/00031 The Aral Sea: recent limnological changes and their conservation significance W. D. Williams & N. V. Aladin, Aquatic Conservation, 1(1), 1991, pp 3-23. Important changes include the decreased water-level (15 m), the recession of the shoreline (up to 120 km in places), the exposure of large areas of lake bed, the increased salin- ity (from e l0 to 30 g l"t), and the marked alteration in the nature of the lacustrine biota involving decreases in diver- sity and biomass and the introduction of species. Fish have virtually disappeared from the lake and the diversity of associated wildlife communities has decreased.

-from Authors