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Title:Velikost legla, velikost jajc in fenologija prihoda na gnezdišče pri navadni čigri Sterna hirundo v SV Sloveniji
Authors:ID Janžekovič, Franc (Author)
ID Štumberger, Borut (Author)
ID Denac, Damijan (Author)
Files:URL http://www.dlib.si/details/URN:NBN:SI:doc-1A7OZV3X
 
Language:Slovenian
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:PEF - Faculty of Education
Abstract:Navadne čigre Sterna hirundo so se v gnezdilni okoliš na območju Drave vračale v začetku aprila. V članku predstavljamo meritve 471 jajc iz 184 gnezd navadne čigre. Povprečna velikost legla je bila 2,55 (mediana = 3, min = 1, max = 4) jajc na gnezdo, povprečna velikost jajc je bila 41,1 x 30,3 mm. Med dvo-, tro- in štirijajčnimi legli ni bilo značilne razlike v povprečni dolžini jajc, v povprečni širini jajc pa so se značilno razlikovala predvsem legla s štirimi jajci. Korelacija med dolžino in širino jajc je bila zelo ohlapna (r = 0,25, p < 0,0001). Dolžina jajc je bila variabilnejša spremenljivka (CV%EL = 4,33) od širine (CV%EB = 2,96). Velikostni vzorci jajc v leglih navadnih čiger se ravno ne ujemajo s hipotezo manjšanja legla (brood-reduction hypothesis), pokateri je vsako izleženo jajce znotraj enega gnezda manjše od predhodnega.
Keywords:ptice, čigre, navadna čigra, Sterna hirundo, prvi pomladanski prihod, velikost legla, velikost jajc, Slovenija severovzhodna Slovenija
Publication status:Published
Publication version:Version of Record
Place of publishing:Ljubljana
Publisher:Društvo za opazovanje in proučevanje ptic Slovenije
Year of publishing:2003
Number of pages:str. 61-66
Numbering:Letn. 24, št. 117
PID:20.500.12556/DKUM-53081 New window
UDC:598.8(497.4)
ISSN on article:0351-2851
COBISS.SI-ID:13071368 New window
NUK URN:URN:SI:UM:DK:WRMNUWBC
Publication date in DKUM:10.07.2015
Views:1632
Downloads:134
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:Acrocephalus
Shortened title:Acrocephalus
Publisher:Društvo za opazovanje in proučevanje ptic Slovenije
ISSN:0351-2851
COBISS.SI-ID:7679234 New window

Secondary language

Language:English
Title:Common Tern's Sterna hirundo clutch size, egg dimensions and phenology of its arrival to the breeding site in NE Slovenia
Abstract:Common Terns Sterna hirundo began to return to their breeding sites on the Drava river in early April. The article presents the measurement of 471 Common Terns' eggs from 184 nests. Average clutch size was 2.55 (median = 3, min = 1, max = 4) eggs per nest, with an average egg size of 41.1 x 30.3 mm. There was no characteristic difference in the average egg length between the two-, three- and four-egg clutches. Concerning the average breadth of eggs, characteristic differences were noted particularly in four-egg clutches. Correlation between egg length and breadth was very loose (r = 0.25, p 0.0001). Egg length was more variable (CV%EL =4.33) than egg breadth (CV%EB = 2.96). Size patterns in Common Terns' clutches were not quite consistent with the brood-reduction hypothesis, according to which every egg laid in a single nest is smaller than the previous one.
Keywords:birds, common tern, Sterna hirundo, first spring arrival, clutch size, eggs size, Slovenia, North-eastern Slovenia


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