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6. Probabilidad de detección en función de la distancia del rebeco en la RRC de Somiedo. Como era esperable la detectabilidad se mantiene a grandes distancias, al menos hasta los 600 m, aunque el histograma que representa las observaciones reales muestra dos descensos bruscos de los animales vistos, uno a 250 m y otro a 600 m, probablemente a causa de la topografía.
Source publication
Handbook to provide easy tools to managing animal populations (mainly, but not only, mammls) to hunting or conservation projects.
Items:
Population trends: How to quantify time series.
Demography variables: How to calculate the intrinsic or observed rate of increase, demographic carrying capacity and mortality and survical rates.
Population estimat...
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Citations
... Este muestreo se ha llevado a cabo a partir de parcelas de 7 x 7 m (49 m 2 ) en las que se retiraban los excrementos presentes y se volvían a revisar las parcelas dos meses después (Figura 5). La época más adecuada para hacer los recuentos fecales es al final del invierno, entre los meses de febrero y abril (Nores et al. 2013), dada la mayor detectabilidad de las deposiciones de los ungulados forestales. En este trabajo se ha hecho recuentos con una frecuencia bimestral (n = 40 parcelas), coincidiendo con los muestreos de distancias, y se ha realizado un muestreo intensivo, duplicando el esfuerzo, en el mes de marzo (n = 80 parcelas) (Figura 5). ...
... En cuanto a la tasa de descomposición, se sustituyó ésta por el número de días entre visitas ya que el tiempo que pasaba entre una y otra no excedía del periodo de descomposición (en cada visita se eliminaban los excrementos presentes). (Mayle et al. 1999) 67 +/-42, bosque caducifolio (Torres et al. 2013) Corzo 20 (17-23) Mayle et al. (1999) Mitchell et al. (1985 113, Asturias (Nores et al. 2013 ...
The Señorío de Bértiz Natural Park (Baztan, Navarre) is a beech forest Fagus sylvatica of 2,050 ha. It has a
Management Plan which advocates for the natural evolution of the forest, without human intervention. In order to know
the absolute abundance of forest ungulates, between September 2016 and September 2017 we have: (i) carried out a
sampling of plots of feces, in order to estimate the abundance using the defecation rate; (ii) conducted nightly itineraries
with spotlight and (iii) carried out walking tours at dawn and dusk, in order to estimate abundance using Distance Sampling.
The nightly itineraries provided information on the distribution of the three species in the Park. The sampling of the
plots showed absolute densities of 3.2; 1.9 and 17.1 km-2 for deer, roe deer and wild boar, respectively. The Distance Sampling
applied to the walking itineraries showed a density of 1.3 km-2 for the red deer and could not be estimated for the
rest of the species due to its low rate of encounter. In the itineraries domestic ungulates have been spotted in a timely
manner. With respect to the estimate made in 1996/97, wild ungulates have increased and domestic ones have declined
considerably. Then the sheep were predominant and now the wild forest ungulates are more abundant.
Wild boar is an important species throughout the Iberian Peninsula, and populations exist from sea level to elevations of >2000 m in high mountain environments, which reflects its incredible ability to adapt to a wide range of natural and cultural environments. To summarize the scientific and management knowledge on this species in Portugal and Spain, we reviewed 174 published and unpublished texts written since 1914. Research has progressed from descriptive studies toward applied ecology, which has focused on the problem that species poses to its environment. We identified six main fields of study interest and potential wild boar conflict: (i) the role of the species in natural and semi-natural ecosystems, (ii) agricultural damages, (iii) car accidents, (iv) disease transmission and reservoir, (v) hunt and control, and (vi) urban wild boars.
