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    First record and molecular detection of Ornithodoros maritimus Vermeil & Marguet, 1967 in Türkiye with notes on other tick species collected on the Gull Island, Sinop
    (Springer, 2026) Ozsemir, Arif Cemal; Sonmez, Evrim; Zarrabi-Ahrabi, Salar; Gargili-Keles, Aysen; Akyildiz, Gurkan
    Ticks play an important role in the ecology of zoonotic diseases, however their diversity and host associations in insular ecosystems remain insufficiently documented in T & uuml;rkiye. We investigated tick occurrence on yellow-legged Gulls (Larus michahellis) and within their nesting environment on Gull Island (Sinop, T & uuml;rkiye) between March and June 2025. A total of 574 gull chicks and 833 nests were examined, yielding eight tick specimens. Morphological examination and molecular analyses revealed three noteworthy observations: (i) the detection of an adult Ixodes ricinus female attached to a yellow-legged gull chick, representing a rare avian host record, (ii) the presence of a questing male Hyalomma marginatum on the island floor, and (iii) the first record of Ornithodoros maritimus in T & uuml;rkiye, confirmed by mitochondrial 16 S rRNA sequencing and phylogenetic analysis. The findings suggest that small insular habitats can be intermittently colonized by tick species of medical relevance, likely through host-mediated dispersal, while also highlighting ecological constraints that may limit long-term population establishment. These observations contribute to the faunistic knowledge of ticks in T & uuml;rkiye and underscore the need for targeted surveillance of seabird-associated soft ticks along coastal ecosystems.
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    THE EFFECTS OF ENVIRONMENTAL SEASONAL CHANGES ON EURASIAN BLACKBIRDS (TURDUS MERULA) PLASMA T3 (TRIIODOTHYRONINE) AND T4 (THYROXINE) HORMONES
    (Parlar Scientific Publications (P S P), 2021) Sonmez, Evrim; Gursoy-Ergen, Arzu; Ozsemir, Arif Cemal; Cenesiz, Sena; Cenesizs, Metin
    This study was conducted in order to determine the effects of seasonal and daily temperatures on the levels of plasma thyroid hormone (T3 and T4) of Eurasian Blackbird (Turdus merula) among the different seasons. During the field studies carried out in Sarikum Sinop between 2017-2018, 48 T. merula were caught with mist nets, ringed and blood samples were taken for hormone analysis. It was found that thyroid hormone levels were affected by seasonal temperatures as a result of hormone analysis. According to our results plasma T3 and T4 hormone concentrations were changed in both morning and afternoon groups in autumn, winter, spring and summer seasons, and this situation was closely related to the reproductive period or moulting of T. merula while that seasonal varying temperatures affect the amount of these hormones. The dramatic temperature differences both seasonally and during the day were important factors in changing hormone levels.