Long‐term series of measurements of eggs and chicks of Caspian terns ( Hydroprogne caspia ) breeding in Lake Chany, Western Siberia, Russia, during 1985 and 2011

Caspian terns ( Hydroprogne caspia Pallas, 1770) present a sub‐cosmopolitan but scattered distribution, and many of its colonies are in a vulnerable state. The species has been listed in the Red Data Book of the Russian Federation and is covered by the Agreement on the Conservation of African‐Eurasi...

Full description

Saved in:
Bibliographic Details
Published in:Ecological research 2023-09, Vol.38 (5), p.708-713
Main Authors: Yurlov, Alexander K., Yurlova, Natalia I., Garyushkina, Maria Yu, Selivanova, Marina A., Doi, Hideyuki
Format: Article
Language:English
Subjects:
Aquatic birds
Body weight
Breeding seasons
Chicks
Clutch size
Clutches
Colonies
Colour
Datasets
Egg shells
Eggs
Hatching
Juveniles
Lakes
Migratory birds
Nesting
Nests
Seabirds
Threatened species
Waterfowl
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Caspian terns ( Hydroprogne caspia Pallas, 1770) present a sub‐cosmopolitan but scattered distribution, and many of its colonies are in a vulnerable state. The species has been listed in the Red Data Book of the Russian Federation and is covered by the Agreement on the Conservation of African‐Eurasian Migratory Waterbirds. We observed the colonies of Caspian terns repeatedly in the breeding season from May to June on the islands of Lake Chany from 1985 to 2011. We recorded clutch size, eggshell coloration and measured egg length and width to the nearest 0.1 mm with a caliper. Furthermore, we recorded the fate and hatching date of individual eggs and determined the clutch initiation date. Head, bill, tarsus length, and body weight of newly hatched chicks were measured. Caspian tern colony size changed between years from 50 nests in 1985 to 513 in 1999; therefore, the sample size of measured eggs varied from 90 to 1045. A total of 4137 eggs and 570 chicks were measured. We provide new information for this species nesting in west Siberia, which is important to compare with other local results. The presented data set is a novel long‐term data set on an isolated population of this species in center of Eurasian continent. The complete data set for this abstract published in the Data Article section of the journal is available in electronic format in MetaCat in JaLTER at http://db.cger.nies.go.jp/JaLTER/metacat/metacat/ERDP-2023-02.1/jalter-en .
ISSN:0912-3814
1440-1703
DOI:10.1111/1440-1703.12407