NDLI: Demography of grey partridges Perdix perdix in Poland in the years 1991

Content Provider	Springer Nature Link
Author	Panek, Marek
Copyright Year	2005
Abstract	Grey partridge Perdix perdix populations were monitored in the years 1991–2004 in ten agricultural areas (100–200 km2 each) located in various regions of Poland. Spring density (call counts in March/April) and parameters describing reproductive success (counts of adult and young birds in coveys found in August) were estimated, and annual survival rate of adult birds was calculated. In the 1990s, the mean spring density of grey partridge in Poland showed a threefold decrease. In 1993 (the year of the highest mean density), from 4.6 pairs/km2 to 20.0 pairs/km2 were found in individual areas; whereas in 2004, there were from 0.4 pairs/km2 to 8.3 pairs/km2. The mean brood-production rate in individual years ranged from 29% to 49% (overall mean 36.8%), the chick-survival rate from 31% to 56% (43.1%), the young production from 1.6 to 2.8 young per adult (2.32 young/adult) and the annual survival rate of adult birds from 25% to 33% (28.3%). The population decrease in the 1990s was connected with the drop of reproductive success, including both the brood-production rate and the chick-survival rate, as well as with the decline of annual survival rate of adult birds. The decrease of brood-production rate and adult-survival rate probably resulted mainly from increased abundance of nest and incubating female predators (particularly foxes). Fluctuations in chick-survival rate were related to weather conditions, but also slight long-term decline was recorded, probably due to more intensive pesticide use.
Starting Page	14
Ending Page	18
Page Count	5
File Format	PDF
ISSN	16124642
Journal	European Journal of Wildlife Research
Volume Number	51
Issue Number	1
e-ISSN	14390574
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-02-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Density changes Reproductive parameters Survival Population dynamics Monitoring
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics Management, Monitoring, Policy and Law Nature and Landscape Conservation

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