Tytuł
Hybridization of the Mediterranean Gull Ichthyeatus melanocephalus in Poland
Autorzy
[ 1 ] Pracownia Badań Ornitologicznych, Muzeum i Instytut Zoologii PAN | [ P ] pracownik
Dyscyplina naukowa (Ustawa 2.0)
Rok publikacji
2022
Opublikowano w
Typ artykułu
artykuł naukowy
Język publikacji
angielski
Słowa kluczowe
Streszczenie
EN Hybridization, the interbreeding of individuals from different taxa, is usually the result of contact between closely related spe-cies. It occurs when reproductive barriers between species are not fully developed during speciation. Gulls are a classic example of hybridization in birds. However, the group of so-called “small gulls” is poorly recognized in this context. Here, we summarised data on Mediterranean gulls Ichthyeatus melanocephalus hybridi-zation documented in Poland for the 2006–2022 period. In the mid-20th century, this species began to successfully colonising many European countries, and the first documented breeding pair of Mediterranean gull was recorded in Poland in 1981. The first documented cross-breeding between a male Mediterranean gull and a female black-headed gull Chroicocephalus ridibunduswas recorded in Poland in 2006. Since then, a total of 25 interspe-cific pairs, between Mediterranean gulls and black-headed gull or common gull Larus canus, have been observed. Interspecific pairs with black-headed gull were the most numerous (76%). However, mixed pairs – formed by one of parental species and individual of the Mediterranean gull hybrid – were the most common pair cat-egory (N = 60). Neither pairs consisting of two hybrids individuals nor of Mediterranean gulls × common gull hybrids have been re-corded in the colonies. The number of Mediterranean gulls fluctu-ated between 50 and 100 pairs during studied period. The number of interspecific breeding pairs remained constant over a 17-year period, one to three pairs per breeding season, while the num-ber of mixed breeding pairs has increased over time and reached maximum 9 pairs per season. Overall, there is a clear increase in the proportion of mixed and interspecific broods in relation to the number of pairs consisting of two ‘pure’ Mediterranean gulls, such pairs approached 38% in 2019.
Strony (od-do)
175 - 184
Punktacja Ministerstwa / czasopismo
40
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