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Auteur I. Newton |
Documents disponibles écrits par cet auteur (19)
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Academic Press London (GBR) 976p illOuvrage
Oxford University Press Oxford (GBR) 386pOuvrage
Academic Press London (GBR) 668p illOuvrage
Academic Press San Diego (USA) 597p illArticle
R.W. Ashford ; I. Wyllie ; I. Newton 1990J Natur Hist 24 p1101-1107Ouvrage
Academic Press London (GBR) 479p illOuvrage
Poyser Calton (GBR) 396p 90fig 63tabl 24phot dessinsArticle
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I. Newton, Auteur ; P. Rothery, AuteurDans Ardea (86(1) 1998)Overall, female Sparrowhawks improved in the mean number of young they raised per year up to the 5th year of life, and then declined. An attempt is made to find to what extent this mean trend is caused by similar trends in the breeding of indivi[...]Article
I. Newton, AuteurPopulations of migratory birds are usually considered to be limited by conditions in breeding or wintering areas, but some might be limited by conditions encountered on migration. This could occur at stopover sites where competition for restrict[...]Article
I. Newton, AuteurDans Ardea (89(1) 2001)Most Sparrowhawks Accipiter nisus were present on particular territories for only one breeding season, but others were present on the same territory for up to eight seasons. Short periods of occupancy were due partly to mortality and partly to a[...]Article
I. Newton, AuteurThis paper is concerned mainly with the differences between obligate and facultative migration in birds. Obligate migration is considered "hard-wired", in that the bird seems pre-programmed to leave its breeding area at a certain time each year,[...]Article
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I. Newton, Auteur ; P. Rothery, AuteurRing recoveries were used to explore the effect of early experience on the subsequent survival and dispersal of young Sparrowhawks in two areas in south Scotland. Young raised on high grade territories were recovered in greater proportion than y[...]Article
I. Newton, AuteurA major perceived cost of migration in birds is the associated mortality. This mortality has proved difficult to measure and separate from mortality during stationary periods of the annual cycle. This paper reviews some major recorded mortality [...]