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Factors controlling the Population of the Partridge ( Perdix perdix ) in Great Britain.
Author(s) -
Middleton A. D.
Publication year - 1935
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1469-7998.1935.tb06265.x
Subject(s) - biology , emigration , population , demography , shot (pellet) , zoology , geography , archaeology , chemistry , organic chemistry , sociology
SUMMARY. The influence of various factors causing mortality among partridges is reviewed, with supporting statistics to show the losses at various stages from egg to adult. The available evidence indicates that the losses on a normal English game preserve average 22 per cent, of nests, 7 per cent. of eggs unhatched, 52 per cent, mortality among chicks, 55 per cent, of surviving birds shot, and a winter loss (probably largely due to emigration) of 40 per cent. of those left after the shooting season.