Original scientific paper
https://doi.org/10.20302/NC.2015.24.7
Considerations on population ecology of Red-backed shrike (Lanius collurio Linnaeus, 1758) and Woodchat shrike (Lanius senator Linnaeus, 1758) within bird communities in an area of Western Istria
Roberto Guglielmi
; Via Ereditari n. 31 – 30027 San Donà di Piave, Venice - Italy
Miro Tasso
; Via Porara n. 79 – 30035 Mirano, Venice – Italy
Abstract
In July and August 2013, in an area of Western Istria, research into the co-presence of the red-backed shrike (Lanius collurio) and the wood chat shrike (Lanius senator) was carried out among the bird communities within 17 parcels of land, delimited by the main vehicular roads. Among 60 shrike settlements, 6 sympatric settlements were found, in which the woodchat shrike is dominant over the red-backed shrike in large open areas, while the latter presents a higher colonizing capability. A comparison of the bird communities by means of the Bray-Curtis similarity coefficient indicated the existence of a cluster made up of central and northern parcels of land characterized by a better environmental quality, in which the highest diversity indexes were found.
Keywords
Red-backed shrike; Woodchat shrike; Western Istria; Bray-Curtis index; diversity index; bird communities
Hrčak ID:
140222
URI
Publication date:
30.6.2015.
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