The morphometric examination of head area of black headed gulls (larus ridibundus) from marmara region
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Date
2020-02-24
Authors
Gündemir, Ozan
Pazvant, Gülsün
İnce, Nazan
Journal Title
Journal ISSN
Volume Title
Publisher
Bursa Uludağ Üniversitesi
Abstract
The Black-headed gull (Larus ridibundus), a gull species commonly seen on shores of Küçükçekmece lake located in Turkey’s Marmara Region. This bird does not show sexual dimorphism because as it has monomorphic feather characteristics like other gull species.. In order to perform sex discrimination in gulls, the effective discriminant function analysis (DFA) method is used for the measurements based on the external morphology and determining the variables discriminating the two sex groups. The head morphological measurements and the body weights of 28 (14 males and 14 females) adult Black-headed gulls were obtained. One discriminant function 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 discriminant function analysis in which the head length, determined to be more significant compared to the other variables, was used. The aim of the study is to assess the sexual dimorphism in population of Black-headed gull and represent a reliable method to make a sex discrimination along with discriminant analysis.
Description
Keywords
Avian anatomy, Black headed gulls, Head morpmometry, Marmara sea
Citation
Gündemir, O. vd. (2020). "The morphometric examination of head area of black headed gulls (larus ridibundus) from marmara region". Uludağ Üniversitesi Veteriner Fakültesi Dergisi, 39(1), 49-53.