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Providing evidence to improve practice

Individual study: Differences in survival for grey partridge Perdix perdix released at different times and in different-sized groups

Published source details

Rantanen E.M., Buner F., Riordan P., Sotherton N. & Macdonald D.W. (2010) Habitat preferences and survival in wildlife reintroductions: an ecological trap in reintroduced grey partridges. Journal of Applied Ecology, 47, 1357-1364


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Release birds in ‘coveys’ Bird Conservation

A replicated study on four farms in Gloucestershire and Oxfordshire, England, in 2007 (Rantanen et al. 2010) found that grey partridge Perdix perdix released in coveys in autumn had significantly higher survival (78% survival of 92 monitored birds over 13 days) than adult birds released in pairs in spring (42% survival for 70 birds). The authors suggest that the differences were due to different habitat use: spring-released birds spent a lot of time in fields and field margins, whilst autumn birds spent more time in game cover crops. Use of field margins was negatively associated with survival, whilst use of crops was positively associated.

 

Create uncultivated margins around intensive arable or pasture fields for birds Bird Conservation

A replicated study on four farms in Gloucestershire and Oxfordshire, England, in 2007 (Rantanen et al. 2010) found that grey partridge Perdix perdix released in pairs in the spring used field margins more frequently than birds released as family groups in the autumn. This study is discussed in detail in ‘Captive breeding, rearing and releases (ex situ conservation)’.

 

Plant wild bird seed or cover mixture Bird Conservation

A replicated study on four farms in Gloucestershire and Oxfordshire, England, in 2007 (Rantanen et al. 2010) found that grey partridge released in coveys in the autumn used cover crops more frequently than birds released in pairs in the spring. This study is discussed in ‘Captive breeding, rearing and releases (ex situ conservation)’.

 

Plant wild bird seed or cover mixture Farmland Conservation

A replicated study on four farms in Gloucestershire and Oxfordshire, England, in 2007 (Rantanen et al. 2010) found that grey partridge Perdix perdix released in coveys in the autumn used cover crops more frequently than birds released in pairs in the spring. Four farms were studied. Birds were radio-tagged and their positions marked on a 1:5000 map.

 

Create uncultivated margins around intensive arable or pasture fields Farmland Conservation

A replicated study in 2007 in Gloucestershire and Oxfordshire, England (Rantanen et al. 2010) found that grey partridge Perdix perdix released in pairs in the spring used field margins more frequently than birds released in coveys in the autumn. Four farms were studied. Birds were radio-tagged and their positions marked on a 1:5000 map.