Pesitsusaegsete soorollide jaotus väike-konnakotkastel
Laen...
Kuupäev
2025
Kättesaadav alates
01.09.2025
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Väike-konnakotkas (Clanga pomarina) on üks viiest Eestis pesitsevast
kotkaliigist ning kuulub I kaitsekategooriasse, mis tähendab, et tegemist on äärmiselt ohustatud
ning looduskaitse seisukohast väga olulise liigiga. Kuigi mitmete röövlindude pesitsusaegseid
soorolle on põhjalikult uuritud, puuduvad seni vastavad uuringud väike-konnakotka kohta.
Käesoleva töö eesmärk oli selgitada välja pesitsusaegsete tegevuste ajaline jaotus väikekonnakotka
emas- ja isaslindude vahel ning selle varieeruvus erinevates pesitsuspaikades. Töö
aluseks olid väike-konnakotkaste pesade juurde paigaldatud rajakaamerate jäädvustused.
Andmeid koguti 2023. aastal Tartumaalt ning kokku analüüsiti 54 479 rajakaamera pilti.
Uurimistöö käigus määratleti emas- ja isaslinnu peamised pesitsusülesanded ning analüüsiti
nende muutumist pesitsusperioodi jooksul. Samuti toodi välja tegevusjaotuse erinevused kahe
pesakoha – Sojamaa ja Karijärve – vahel. Uuring näitas, et emaslindude roll oli domineeriv nii
haudumisel kui poja toitmisel, samas kui isaslindude peamine panus seisnes saagi hankimises.
Pesaehitusse panustasid mõlemad vanalinnud, kuid erinevatel pesitsusperioodi etappidel.
The Lesser Spotted Eagle (Clanga pomarina) is one of five eagle species that breed in Estonia and is classified under the strictest protection category, indicating it is an endangered and conservation-priority species. While the breeding roles of many raptor species have been extensively studied, no such research has been conducted on the Lesser Spotted Eagle. The aim of this bachelor’s thesis was to investigate the temporal distribution of breeding activities between male and female Lesser Spotted Eagles and to examine the variability of these roles across different nesting sites. The study was based on data collected in 2023 from Tartu County using trail cameras installed near eagle nests. A total of 54 479 camera trap images were analyzed. The main parental duties of males and females were identified, along with their temporal changes during the breeding period. Differences in behavior between the two nesting sites— Sojamaa and Karijärve—were also examined. The results showed that females were primarily responsible for egg incubation and chick care, while males predominantly handled hunting and food provisioning. Both sexes contributed to nest building, albeit during different periods.
The Lesser Spotted Eagle (Clanga pomarina) is one of five eagle species that breed in Estonia and is classified under the strictest protection category, indicating it is an endangered and conservation-priority species. While the breeding roles of many raptor species have been extensively studied, no such research has been conducted on the Lesser Spotted Eagle. The aim of this bachelor’s thesis was to investigate the temporal distribution of breeding activities between male and female Lesser Spotted Eagles and to examine the variability of these roles across different nesting sites. The study was based on data collected in 2023 from Tartu County using trail cameras installed near eagle nests. A total of 54 479 camera trap images were analyzed. The main parental duties of males and females were identified, along with their temporal changes during the breeding period. Differences in behavior between the two nesting sites— Sojamaa and Karijärve—were also examined. The results showed that females were primarily responsible for egg incubation and chick care, while males predominantly handled hunting and food provisioning. Both sexes contributed to nest building, albeit during different periods.
Kirjeldus
Bakalaureusetöö
Loodusturismi õppekaval
Märksõnad
bakalaureusetööd, röövlinnud, väike-konnakotkas, pesitsusaeg, soorollid