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Titolo:
LIFE-HISTORY AND VIABILITY ANALYSIS OF THE ENDANGERED HAWAIIAN STILT
Autore:
REED JM; ELPHICK CS; ORING LW;
Indirizzi:
TUFTS UNIV,DEPT BIOL MEDFORD MA 02155 UNIV NEVADA,BIOL RESOURCES RES CTR RENO NV 89512 UNIV NEVADA,ECOL EVOLUT & CONSERVAT BIOL PROGRAM RENO NV 89512 UNIV NEVADA,DEPT ENVIRONM & RESOURCE SCI RENO NV 89512
Titolo Testata:
Biological Conservation
fascicolo: 1, volume: 84, anno: 1998,
pagine: 35 - 45
SICI:
0006-3207(1998)84:1<35:LAVAOT>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
POPULATION VIABILITY; CONSERVATION; DYNAMICS; OYSTERCATCHERS; METAPOPULATION; SIMULATION; SURVIVAL; MODEL; RISK;
Keywords:
HAWAIIAN STILT; HIMANTOPUS; SHOREBIRD; EXTINCTION; PVA; DEMOGRAPHIC MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
66
Recensione:
Indirizzi per estratti:
Citazione:
J.M. Reed et al., "LIFE-HISTORY AND VIABILITY ANALYSIS OF THE ENDANGERED HAWAIIAN STILT", Biological Conservation, 84(1), 1998, pp. 35-45

Abstract

The Hawaiian stilt Himantopus mexicanus knudseni is an endangered, endemic subspecies of black-necked stilt. We present life-history data required to perform population viability analysis (PVA), and the results of a series of PVAs under two scenarios, treating (a) the subspeciesas a single population, and (b) six subpopulations as a metapopulation. We performed sensitivity analyses on model parameters and used results to address various management options. Both basic models predictedthat stilts would increase to fill available habitat with no chance of a significant decline. Catastrophe, maximum age, and density-dependent reproduction had little effect on population projections. Rapid declines in the probability of stilt populations persisting occurred whenclutch failure rate or first-year mortality rate increased above 70%,or when adult mortality rate increased above 30%. Model predictions of mean population size at 200 years tracked changes in carrying capacity. If current conditions change such that rates of clutch failure or stilt mortality increase, population declines and eventual extinction becomes move likely. Managers, therefore, should maintain predator control, limit water level fluctuations, and maintain current habitat area. Downlisting is not warranted because wetland management and predator control are necessary for Hawaiian stilts to persist. Published by Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 05:12:43