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Evolution of populations of terns in the Delta Area (Zeeland) : Breeding Success
The data are withheld from general circulation and disclosure but access may be obtained on a case-by-case basis through negotiation
In Zeeland (Delta area) a number of (breeding) biological parameters were determined from Tern and Common Tern. The dataset is the result of determining breeding success of 25 to 50 marked nests of Tern and Common Tern in a number of colonies in the Delta area (Zeeland).
Marine, Brackish water, Terrestrial, Birds, Breeding success, Clutch size, Marine birds, ANE, Netherlands, Delta Area, Netherlands, Zeeland, Sterna hirundo, Sterna sandvicensis
ANE, Netherlands, Delta Area [Marine Regions]
Netherlands, Zeeland [Marine Regions]
1 May 2009 - 1 August 2011
Breeding success: Count of eggs per nests
Number of eggs per nest are counted in 30 to 40 individual enclosed nests in a representative area of the colony. Counted nests are marked and counted eggs are marked.
Clutch size: Count of % of hatched eggs that actually fledged
Cause of loss is noted: predation, found death (starvation or dehydratation). Rule for success of fledging is that winglength exceeds 160 mm for Common tern and 180 mm for Sandwich tern and Black headed gull.
Egg size: Count of percentage of hatched eggs
Cause of loss are noted: predation, trampling, flooding. Hachlings are ringed individually within 3 days from hatching.
Vlaamse overheid; Beleidsdomein Leefmilieu, Natuur en Energie; Instituut voor Natuur- en Bosonderzoek (INBO), more, data owner
Vlaamse overheid; Beleidsdomein Leefmilieu, Natuur en Energie; Instituut voor Natuur- en Bosonderzoek; Afdeling Biodiversiteit en Natuurlijk Milieu; Onderzoeksgroep Ecosysteemdiversiteit, more, data creator
Evolution of populations of coastal breeders in the Delta Area (Zeeland): Egg size, more
Dataset status: In Progress
Data type: Data
Data origin: Monitoring: field survey
Metadatarecord created: 2012-01-27
Information last updated: 2012-11-14