Large-scale releases of native species: the mallard as a predictive model system

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Söderquist, PärSwedish University of Agricultural Sciences,Högskolan Kristianstad,Forskningsmiljön Man & Biosphere Health (MABH),Avdelningen för miljö- och biovetenskap,Avdelningen för Naturvetenskap,Sveriges lantbruksuniversitet,Institutionen för vilt, fisk och miljö,Department of Wildlife, Fish and Environmental Studies (författare)

Large-scale releases of native species : the mallard as a predictive model system

BokEngelska2015

Förlag, utgivningsår, omfång ...

Umeå :Sveriges Lantbruksuniversitet,2015
55 s.
electronicrdacarrier

Nummerbeteckningar

LIBRIS-ID:oai:DiVA.org:hkr-19214
ISBN:9789157682482
ISBN:9789157682482
ISBN:9789157682499
ISBN:9789157682499
urn:nbn:se:hkr:diva-19214urn
urn:nbn:se:hkr:diva-13751urn
http://www.slu.se/subweb/bibliotek/slupub/publ/?publ_id=65623URI
http://pub.epsilon.slu.se/id/eprint/11972URI

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Språk:engelska
Sammanfattning på:engelska

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Serie

Acta Universitatis agriculturae Sueciae,1652-6880 ;2015:25

Anmärkningar

gratis
Human alteration of natural systems, and its consequences are of great concern and the impact on global ecosystems is one of the biggest threats that biodiversity stands before. Translocations of invasive species, as well as intraspecific contingents with non-native genotypes, whether they are deliberate or unintentional, are one such alteration and its consequences are continuously being assessed. The mallard (Anas platyrhynchos) is the most numerous and widespread duck in the world and a flagship in wetland conservation. It is also an important game species which is heavily restocked for hunting purposes, especially in Europe where over three million ducklings are released every year. Because of its hunted status, its abundance, and the number of released individuals, it can serve as a model species to study effects of releases, both for conservation and restocking for hunting, on wild populations. In this thesis the status of the mallard was assessed in the Nordic countries and the effects of releases on the wild populations were studied by mining historical ringing data, comparing morphology of present-day wild, farmed, and historical mallards, and analyzing phylogeography of wild and farmed mallards in Europe. The status of the mallard population in the Nordic countries are generally good, however, a joint effort of European countries is needed to monitor and manage the population. A significant difference between wild and farmed mallards concerning longevity, migration, bill morphology and genetic structure was also found, together with signs of cryptic introgression of farmed genotypes in the wild population with potential fitness reduction as a result. The effect is however limited by that only a fraction of released farmed mallards reach the breeding season due to low survival. A natural captive environment is crucial to keep individuals wild-like with high survival rates after release. However, with an introgression of potentially maladapted farmed genotypes leading to a reduction in fitness, a low survival of released mallards would favor the wild population. A legislative change regarding obligation to report numbers, provenance, and release sites of farmed mallard should be considered, together with practical solutions of ringing and genetic monitoring of released mallards.

Ämnesord och genrebeteckningar

NATURAL SCIENCES Biological Sciences hsv//eng
NATURVETENSKAP Biologiska vetenskaper hsv//swe
NATURAL SCIENCES Biological Sciences Zoology hsv//eng
NATURVETENSKAP Biologiska vetenskaper Zoologi hsv//swe
AGRICULTURAL SCIENCES Other Agricultural Sciences Fish and Wildlife Management hsv//eng
LANTBRUKSVETENSKAPER Annan lantbruksvetenskap Vilt- och fiskeförvaltning hsv//swe
NATURVETENSKAP Biologi hsv//swe
LANTBRUKSVETENSKAPER Annan lantbruksvetenskap hsv//swe
AGRICULTURAL SCIENCES Other Agricultural Sciences hsv//eng
Anas platyrhynchos
Farmed
Hunting
Introgression
Longevity
Mallard
Migration
Morphology
Population genetic
Restocking
SNPs
Sweden

Biuppslag (personer, institutioner, konferenser, titlar ...)

Högskolan KristianstadForskningsmiljön Man & Biosphere Health (MABH) (creator_code:org_t)
Sveriges lantbruksuniversitet

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Av författaren/redakt...: Söderquist, Pär

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Biologiska veten ...

NATURVETENSKAP: NATURVETENSKAP; och Biologiska veten ...; och Zoologi

LANTBRUKSVETENSKAPER: LANTBRUKSVETENSK ...; och Annan lantbruksv ...; och Vilt och fiskefö ...

NATURVETENSKAP: NATURVETENSKAP; och Biologi

LANTBRUKSVETENSKAPER: LANTBRUKSVETENSK ...; och Annan lantbruksv ...

Delar i serien: Acta Universitat ...

Av lärosätet: Högskolan Kristianstad

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