Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 525445
Title Bijdrage tot de biologie en de ecologie van den spreeuw (Sturnus vulgaris vulgaris L.) gedurende zijn voortplantingstijd
Author(s) Kluijver, H.N.
Source University. Promotor(en): W.K.J. Roepke. - Wageningen : Veenman - 146
Publication type Dissertation, internally prepared
Publication year 1933
Keyword(s) sturnidae - nederland - netherlands
Categories Aves
Abstract In February, March and April starlings fed in a flock on the fields near nestboxes. At night they roosted together in thousands in the reeds of a pool, 5 km from the nestboxes. In February or March each♂occupied a particular nestbox. Early in the morning they left the flock, and stayed and sang by the nestboxes for 10-30 min., then returned to the flock but returned soon. The♀visited the nestbox a few weeks later. The♂had then already started building the nest.
Later the♀largely completed it. The nests consisted of straw; during the breeding period they were lined with feathers.

The♂more often brought food to the young than the♀. An aphisigraph was used to record the number of feeds brought to the young. To determine the food of the young quantitatively and qualitatively a closely fitting collar of aluminium was placed round their necks for 4 h a day, so that they could not swallow the food. This food was removed from the oesophagus with forceps or from the nest if the young had already rejected it. The food consisted almost entirely of animals. Among 17.933 deliveries there were at least 313 species, among which 267 insect species. Earthworms were only found in minute quantities. Carnivorous arthropods formed 30 % of the food. Although plots with many Tipula larvae were more often visited by the starlings than those with fewer larvae, a colony of starlings had little influence on the population of Tipula paludosa.
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