Sammanfattning

It is a very important, but also a very difficult task, to establish how long a certain species has to remain unregistered before we can declare it extinct. The wrong assumption regarding species extinction could result in a type I or type II statistical error, leading to inappropriate management actions or even species extinction. Recent development of the methods for inferring the threat of extinction, when the only available information is a record of sightings, has enabled a quantitative approach to the problem. In our study we present an index that infers extinction probability based on trends in sighting intervals. Our study comprises a description of the sighting trend index, a sensitivity analysis and an application of the index to the sighting record of the black-footed ferret Mustela nigripes. The main advantage of this method could be its sensitivity to changes in sighting frequency within the sighting record. However, further testing of the method on different data sets could be important for gaining additional knowledge regarding its adequate application in the field of conservation biology

Nyckelord

black-footed ferret; extinction probability; modelling; Mustela nigripes

Publicerad i

Wildlife Biology
2010, Volym: 16, nummer: 3, sidor: 267-275

SLU författare

• Ebenhard, Torbjörn

  • Institutionen för stad och land, Sveriges lantbruksuniversitet
    

Associerade SLU-program

SLU Centrum för biologisk mångfald, CBM


Globala målen

SDG15 Skydda, återställa och främja ett hållbart nyttjande av landbaserade ekosystem, hållbart bruka skogar, bekämpa ökenspridning, hejda och vrida tillbaka markförstöringen samt hejda förlusten av biologisk mångfald


UKÄ forskningsämne

Miljö- och naturvårdsvetenskap


Publikationens identifierare

DOI: https://doi.org/10.2981/09-044

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/31146