The Morphometric Examination of Head Area of Black Headed Gulls (Larus Ridibundus) from Marmara Region
The Black-headed gull (Larus ridibundus), a gull species commonlyseen on shores of Küçükçekmece lake located in Marmara Region, does not exhibitsexual dimorphism as it has monomorphic feather traits like the other gullspecies. In order to perform sex discriminationin gulls, the effective discriminan...
| Published in: | Journal of Research in Veterinary Medicine |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Bursa Uludağ University
2020
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| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/pub/jrvm/issue/56195/634404 https://doi.org/10.30782/jrvm.634404 |
| Summary: | The Black-headed gull (Larus ridibundus), a gull species commonlyseen on shores of Küçükçekmece lake located in Marmara Region, does not exhibitsexual dimorphism as it has monomorphic feather traits like the other gullspecies. In order to perform sex discriminationin gulls, the effective discriminant function analysis (DFA) method is used forthe measurements based on the external morphology and determining the variablesdiscriminating the two sex groups. The head morphological measurements and thebody weights of 28 adult Black-headed gulls were obtained. One discriminantfunction was determined based on the results. The accuracy rate in two sexes was determined to be 82.1% (85.7% female,78.6% male) using the formula we obtained as a result of the discriminantfunction analysis in which the head length, determined to be more significantcompared to the other variables, was used. The aim of the study is to assessthe sexual dimorphism in population of Black-headed gull in Küçükçekmece Lakeand its surrounding located in Marmara Region and represent a reliable methodto make a sex discrimination along with discriminant analysis. |
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