Metssigade arvukuse ja metssearühmade kodupiirkondade kattuvuse määratlemise võimalustest rajakaamerate abil
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Kuupäev
2017
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Käesoleva töö eesmärk on analüüsida ühele jahimaale süsteemselt paigutatud
rajakaamerate jäädvustusi, püüda hinnata metssigade arvukust enne sigimisperioodi algust
ning hinnata rajakaamerate jäädvustuste alusel, kui sageli erinevad metssearühmad
külastavad samu söötmisplatse, mis ühtlasi näitab, mil määral nende kodupiirkonnad
kattuvad.
Katse teostamiseks paigaldati ajavahemikus 27.09.2015–17.04.2016 üheksale Järvamaal
Lõõla jahipiirkonnas asuvale söödaplatsile rajakaamerad. Kasutades rajakaamera
jäädvustusi, loendati igal vaatluse päeval söödaplatse külastanud metssead ning lähtudes
metssigade arvust rühmas ja rühma vanuselisest struktuurist, identifitseeriti söötmispaiku
külastanud metssigade rühmad. Fikseeriti rühma platsile saabumise ja sealt lahkumise
kellaaeg ning selle alusel leiti rühma platsil viibimise aeg. Leiti söödaplatsi külastamise
absoluutne sagedus ja erinevate rühmade arv, kes söödaplatsi külastasid ööpäevas ja
vaatlusperioodi vältel.
Tulemustest selgus, et metssigade kevadine arvukus Lõõla jahtkonna vaadeldaval alal oli
vähemalt 81 isendit. Söödaplatse külastati kokku 95 ööpäeval ja keskmiselt külastas
ööpäevas söödaplatse 1,3 rühma. Käesoleva töö käigus selgus, et erinevad metssearühmad
kasutavad samu söödaplatse ning seetõttu nende kodupiirkonnad kattuvad.
The aim of this bachelor's thesis is to analyse the recordings from trail cameras that were systematically installed at a single hunting site, try to assess the abundance of wild boars prior to the mating season and use the recordings from trail cameras to assess how often the different groups visited the same feeding sites, which would also show to what extent their home ranges overlap. Trail cameras were installed between 27 September 2015 and 17 April 2016 at 9 feeding sites located in Järva County in the Lõõla hunting area for conducting the experiment. Captured evidence from trail cameras was used for counting the number of wild boars visiting the feeding sites each day and for identifying the groups visiting the sites based on the number of individuals in the group and its age structure. The time of arrival and departure from the sites was recorded to find the time period that the groups spent at the sites. The absolute frequency of feeding site visits and the number of different groups that visited the sites per day and during the whole extent of the observation period was recorded. The results showed that the abundance of wild boars in spring in the Lõõla hunting area was at least 81 individuals. The feeding sites were visited a total of 95 times, and on average, 1.3 groups visited the sites per day. This study showed that different groups use the same feeding sites, and therefore, that their home ranges overlap.
The aim of this bachelor's thesis is to analyse the recordings from trail cameras that were systematically installed at a single hunting site, try to assess the abundance of wild boars prior to the mating season and use the recordings from trail cameras to assess how often the different groups visited the same feeding sites, which would also show to what extent their home ranges overlap. Trail cameras were installed between 27 September 2015 and 17 April 2016 at 9 feeding sites located in Järva County in the Lõõla hunting area for conducting the experiment. Captured evidence from trail cameras was used for counting the number of wild boars visiting the feeding sites each day and for identifying the groups visiting the sites based on the number of individuals in the group and its age structure. The time of arrival and departure from the sites was recorded to find the time period that the groups spent at the sites. The absolute frequency of feeding site visits and the number of different groups that visited the sites per day and during the whole extent of the observation period was recorded. The results showed that the abundance of wild boars in spring in the Lõõla hunting area was at least 81 individuals. The feeding sites were visited a total of 95 times, and on average, 1.3 groups visited the sites per day. This study showed that different groups use the same feeding sites, and therefore, that their home ranges overlap.
Kirjeldus
Bakalaureusetöö
Vee ja maismaa ökosüsteemide rakendusbioloogia õppekaval
Märksõnad
metssiga, kodupiirkonnad, rajakaamerad, bakalaureusetööd