Scale, Variable Density, and Conservation Planning for Mammalian Carnivores

摘要: : Many mammalian carnivores are in local or global decline. To slow this process, continued planning to protect these species is warranted, Still, the data bases that we have at our disposal do not adequately document population requirements for space scales appropriate conservation planning. illustrate problem, collected published 214 censuses of carnivores. We tested a relationship between number individuals censused and size study site entire set. conducted same test each family, which obtained sufficient qualifying census With areas ranging from less than 10 km2 over 40,000 km2, significant regression (p < .001; r2= 76%) sample as whole. examined distribution densities with increasing area found was constant but decreased noticed numbers per census-area increased slope (m 1). also sizes were unevenly distributed Only 7% studies regions larger 10,000 km2. It remains unclear what extent how density decreases scale expect extrapolations small ones likely underestimate carnivores. Resumen: Muchos mamiferos carnivoros estan disminuyendo en localidades o todo el mundo. Para disminuir la velocidad de este proceso se exige una continua planiyicacion proteccion estas especies Aun asi las datos que tenemos no documentan adecuadumente los requisitos espacio poblaciones escala apropiada para planificacion conservacion ilustrar problema, hemos recolectado publicados cmos poblacion carnivoros. Determinamos si habia relacion entre numero individuos contados y tamano del sitio estudiado, nuestro juego total Hicimos misma prueba cada familia obtuvimos censos suficientes descriptivos Las zonas estudiadas variaron menos mas 40.000 Encontramos regresion significativa 0,001; 76%)para muestra total. Examinamos distribucion densidades funcion area, encontramos era constante pero iba decreciendo. Notamos cifras censada, aumentaba con cierta pendiente Tambien notamos tenia Distribucion heterogenea Solamente un estudios nuestra inclufa 10.000 No esta claro como hasta punto disminuye densidad al aumentar Sospechamos extrapolaciones pequena gran podrin subestimar requerimientos