1. bookVolume 9 (2015): Issue 1 (January 2015)
    Special Issue Title: International Conference on the Conservation of the Lesser Spotted Eagle, Košická Belá, Slovakia, 2014
Journal Details
License
Format
Journal
eISSN
2644-5247
First Published
09 Nov 2012
Publication timeframe
1 time per year
Languages
English
access type Open Access

Population size, dynamics and reproduction success of the lesser spotted eagle (Aquila pomarina) in Latvia

Published Online: 30 Jun 2015
Volume & Issue: Volume 9 (2015) - Issue 1 (January 2015) - Special Issue Title: International Conference on the Conservation of the Lesser Spotted Eagle, Košická Belá, Slovakia, 2014
Page range: 45 - 54
Journal Details
License
Format
Journal
eISSN
2644-5247
First Published
09 Nov 2012
Publication timeframe
1 time per year
Languages
English
Abstract

We analysed the population size, population dynamics and reproduction success of the lesser spotted eagle in Latvia from 1988 to 2014. While the overall population did not show a statistically significant trend during any of the periods analysed (long, medium and short term), the populations in the individual study areas changed differently: of five research plots, populations were stable in two, increased in one, and decreased in two research plots. Using the existing research plots as samples of breeding numbers in areas of different breeding density classes based on forest management units, the total breeding population in Latvia was estimated. The overall number of breeding pairs in 2012-2014 was between 3700-4000. During the period 1988-2014, 65.62% of all pairs recorded as present on their home range, made a breeding attempt and laid eggs. The reproductive success ratio was 0.49 young per occupied territory with an adult pair of birds and 0.74 young per breeding pair which laid eggs. Overall, during the 21 -year research period there was a stable long-term trend in reproductive success (young per pair present on home range). Rarely, indeed only in 1 .89% of all cases did two young fledge. The total number of young (young per 100 km2) shows stable long-, medium- and short-term trends with an average value of 5.1 young per 100 km2.

Keywords

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