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Species diversity and seasonal abundance in tropical Sphingidae (Lepidoptera)

Autor: D. F. Owen

Publikováno v: Proceedings of the Royal Entomological Society of London. Series A, General Entomology. 44:162-168

Synopsis An account is given of species diversity in two samples of Sphingidae obtained by different methods of trapping in Freetown, Sierra Leone. Seasonal abundance and resulting seasonal changes in diversity are discussed.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36ce6c1acfeb23020c5d6040edca5e99
https://doi.org/10.1111/j.1365-3032.1969.tb00823.x

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Species diversity and seasonal abundance in Charaxes butterflies (Nymphalidae)

Autor: D. F. Owen, D. O. Chanter

Publikováno v: Journal of Entomology Series A, General Entomology. 46:135-143

SYNOPSIS Species diversity in Charaxes butterflies trapped in gardens at Freetown, Sierra Leone, is calculated by two different methods. There is little evidence of seasonal changes in diversity and in abundance.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::222745522a049f0556a2003f93540408
https://doi.org/10.1111/j.1365-3032.1972.tb00119.x

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LAND-AND SEA-BIRD MIGRATION IN NORTH-WEST SPAIN, AUTUMN 1954

Autor: D. F. Owen, D. W. Snow, R. E. Moreau

Publikováno v: Ibis. 97:557-571

SUMMARY. 1 Between 28 September and 31 October 1954 a visit was paid to N.W. Spain to study the autumn migration and also to collect local information about migrants. Much of the coast between the mouth of the Mino and Santander was visited. 2 We saw

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8316735f6bb52800bbffff6ae65e0fce
https://doi.org/10.1111/j.1474-919x.1955.tb04982.x

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THE FOOD OF THE HERON ARDEA CINEREA IN THE BREEDING SEASON

Autor: D. F. Owen

Publikováno v: Ibis. 97:276-295

Summary. 1 Food samples were collected from nestlings at three heronries by forcing them to regurgitate recent meals. 2 Young Herons are fed about 3–4 times in 24 hours when one parent is feeding and about twice as often when both are feeding. Feed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9dcecbbf37aa95a38c82ff21648c3a7b
https://doi.org/10.1111/j.1474-919x.1955.tb01915.x

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THE BREEDING SEASON AND CLUTCH-SIZE OF THE ROOK CORVUS FRUGILEGUS

Autor: D. F. Owen

Publikováno v: Ibis. 101:235-239

Summary. 1 Annual variations in the breeding season of the Rook near Oxford could be correlated with mean air temperatures in the period prior to egg-laying. 2 The most frequent clutch-size was four to five, and in five out of six years, broods start

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d4666012ec908f8a21aa21500d39478
https://doi.org/10.1111/j.1474-919x.1959.tb02377.x

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THE WINTER WEIGHTS OF TITMICE

Autor: D. F. Owen

Publikováno v: Ibis. 96:299-309

Summary 1 1500 weights of tits were obtained in the winter 1951–52 and in November and December 1952. 2 On average the birds weighed least in the early morning and most just before going to roost in the late afternoon. The increase in weight slacke

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d257138a0a3b866d443ef45196a64eaa
https://doi.org/10.1111/j.1474-919x.1954.tb04130.x

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