1984
DOI: 10.1080/03078698.1984.9673839
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Bird population trends as shown by chick ringing data

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Cited by 9 publications
(8 citation statements)
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“…There may, however, be other natural factors, such as disease, of which we know nothing: there is some evidence to suggest that the decline of the song thrush may have begun before agricultural change became a major force in the environment (Mason & Hussey, 1984;Marchant et al, 1990). There may, however, be other natural factors, such as disease, of which we know nothing: there is some evidence to suggest that the decline of the song thrush may have begun before agricultural change became a major force in the environment (Mason & Hussey, 1984;Marchant et al, 1990).…”
Section: Discussionmentioning
confidence: 99%
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“…There may, however, be other natural factors, such as disease, of which we know nothing: there is some evidence to suggest that the decline of the song thrush may have begun before agricultural change became a major force in the environment (Mason & Hussey, 1984;Marchant et al, 1990). There may, however, be other natural factors, such as disease, of which we know nothing: there is some evidence to suggest that the decline of the song thrush may have begun before agricultural change became a major force in the environment (Mason & Hussey, 1984;Marchant et al, 1990).…”
Section: Discussionmentioning
confidence: 99%
“…The changes in the agricultural environment have been so immense that they are readily implicated in declines of species such as the song thrush. There may, however, be other natural factors, such as disease, of which we know nothing: there is some evidence to suggest that the decline of the song thrush may have begun before agricultural change became a major force in the environment (Mason & Hussey, 1984;Marchant et al, 1990). Whatever the causes, the song thrush in this part of eastern England now appears to be largely restricted to woodlands and gardens.…”
Section: Discussionmentioning
confidence: 99%
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“…They found that there was some recent surveillance of numbers of the great majority of species from various sources, but they did not consider methods which involve ringing. Information on the numbers of birds ringed relative to ringing effort have been used to create indices of population size (eg Mason & Hussey 1984). These can be used to estimate population trends over periods prior to the beginning of current census programmes.…”
Section: The Contribution Of Data From Ringingmentioning
confidence: 99%
“…Age ratios has been estimated (e.g. Ginn 1969, Hjort & are also determined to assess annual changes Lindholm 1978, Barlein 1981, O'Connor & in productivity, and survival is calculated Mead 1984, Mason & Hussey 1984. from retrap rates.…”
mentioning
confidence: 99%