Kováts, Dávid and Harnos, Andrea (2015) Morphological classification of conspecific birds from closely situated breeding areas : A case study of the Common Nightingale. ORNIS HUNGARICA, 23 (2). pp. 20-30. ISSN 1215-1610
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Abstract
In this paper, a complex morphological comparison of four Common Nightin- gale groups (Luscinia megarhynchos) is demonstrated. In total, 121 territorial nightingales were mist-netted and measured individually on four study areas called ‘Bódva’, ‘Felső-Tisza’, ‘Szatmár-Bereg’ and ‘Bátorliget’ in the North-Eastern part of Hungary in 2006–2013. To distinguish groups by morphology, Classification and Regression Trees (CART), Random Forest (RF) and Linear Discriminant Analysis (LDA) methods were used. Comparison of the four studied Common Nightingale groups shows substantial morphological differences in the length of the second, the third and the fourth primaries (P 2 , P 3 , P 4 ), in bill length (BL) and bill width (BW), while other charac- teristics showed greater similarities. Based on the results of all the applied classification methods, birds originated from Szatmár-Bereg were clearly distinguishable from the others. The differences in morphology can be explained by interspecific competition or phenotypic plasticity resulting from the change of ecological, environmental para meters. Our case study highlights the advantageous differences of the classification methods to distinguish groups with similar morphology and to choose important variables for classification. In conclusion, broad application of the classification methods RF and CART is highly recommended in comparative ecological studies.
Item Type: | Article |
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Uncontrolled Keywords: | classification and regression trees, random forest, linear discriminant analysis, morphological classification |
Subjects: | Q Science / természettudomány > QH Natural history / természetrajz Q Science / természettudomány > QL Zoology / állattan S Agriculture / mezőgazdaság > SD Forestry / erdőgazdaság |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 10 Oct 2024 07:26 |
Last Modified: | 10 Oct 2024 07:26 |
URI: | https://real.mtak.hu/id/eprint/207246 |
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