• norsk
    • English
  • norsk 
    • norsk
    • English
  • Logg inn
Vis innførsel 
  •   Hjem
  • Artikler, rapporter, filmer / Articles, reports, movies
  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed
  • Vis innførsel
  •   Hjem
  • Artikler, rapporter, filmer / Articles, reports, movies
  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Demographic side effects of selective hunting in ungulates and carnivores

Milner, Jos M.; Nilsen, Erlend Birkeland; Andreassen, Harry Peter
Peer reviewed, Journal article
Thumbnail
Åpne
Review.pdf (645.9Kb)
Permanent lenke
http://hdl.handle.net/11250/134170
Utgivelsesdato
2007
Metadata
Vis full innførsel
Samlinger
  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed [1666]
Originalversjon
Milner, J., Nilsen, E., Andreassen, H. (2007) Demographic side effects of selective hunting in ungulates and carnivores. Conservation Biology, 21(1), 36-47  
Sammendrag
Selective harvesting regimes are often implemented because age and sex classes contribute differently

to population dynamics and hunters show preferences associated with body size and trophy value. We

reviewed the literature on how such cropping regimes affect the demography of the remaining population

(here termed demographic side effects ). First, we examined the implications of removing a large proportion

of a specific age or sex class. Such harvesting strategies often bias the population sex ratio toward females

and reduce the mean age of males, which may consequently delay birth dates, reduce birth synchrony, delay

body mass development, and alter offspring sex ratios. Second, we reviewed the side effects associated with the

selective removal of relatively few specific individuals, often large trophy males. Such selective harvesting can

destabilize social structures and the dominance hierarchy and may cause loss of social knowledge, sexually selected

infanticide, habitat changes among reproductive females, and changes in offspring sex ratio. A common

feature of many of the reported mechanisms is that they ultimately depress recruitment and in some extreme

cases even cause total reproductive collapse. These effects could act additively and destabilize the dynamics

of populations, thus having a stronger effect on population growth rate than first anticipated. Although more

experimental than observational studies reported demographic side effects, we argue that this may reflect the

quite subtle mechanisms involved, which are unlikely to be detected in observational studies without rigorous

monitoring regimes. We call for more detailed studies of hunted populations with marked individuals that

address how the expression of these effects varies across mating systems, habitats, and with population density.

Theoretical models investigating how strongly these effects influence population growth rates are also required.
Utgiver
Blackwell
Tidsskrift
Conservation Biology

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit
 

 

Bla i

Hele arkivetDelarkiv og samlingerUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifterDenne samlingenUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifter

Min side

Logg inn

Statistikk

Besøksstatistikk

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit