Firts records of Bursatella leachii de Blainville 1817 (Mollusca; Gastropoda; Aplysiidae) in Black Sea

Year 2024, In Press Articles, 1 - 9

Vincenzo Di Martino , Bessy Stancanelli

https://doi.org/10.52998/trjmms.1472623

Abstract

ABSTRACT
This study reports, for the first time, the discovery of the ragged sea hare Bursatella leachii de Blainville 1817 in the Black Sea. The observations were made during the month of September 2023 at depths varying between 1,0 and 4,0 meters by scuba and snorkeling. A total of 484 specimens of this species were found. Of these, a part were observed in the sandy-muddy bottom of Kumbaba beach and a part in the sandy bottom of Uzunkum beach, in the Sile district (Istanbul province). The estimate of the density of individuals per square meter of seabed made it possible to highlight how the high number of individuals was present on the Kumbaba beach near the mouth of the Türknil river. It could be hypothesized that the introduction of this species into Black Sea could have occurred through natural means. This may have been possible for two reasons; the first is that the beaches of Sile are a few kilometers from the Bosphorus Canal while the other reason lies in the fact that the report of B. leachii closest to the town of Sile dates back to January 2020, when the species was observed in the seabed of the coast southern Dardanelles (Çanakkale Strait). To be certain of what has been stated, monitoring should be carried out on a regular basis but, at this moment, this hypothesis appears to be the most real.

Keywords: Bursatella leachii, Black Sea, Turkey, AIS, NIS

Keywords

Bursatella leachii, Black Sea, Turkey, AIS, NIS

Ethical Statement

Authors declare that no ethics committee permissions is required for this study.

Supporting Institution

None

Thanks

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Bursatella leachii de Blainville 1817'nin (Mollusca; Gastropoda; Aplysiidae) Karadeniz'deki ilk kayıtları

Abstract

Bu çalışma, Karadeniz'de ilk kez dağınık deniz tavşanı Bursatella leachii de Blainville 1817'nin keşfini bildirmektedir. Gözlemler 2023 yılının Eylül ayında 1,0 ila 4,0 metre arasında değişen derinliklerde tüplü dalış ve şnorkel dalışı ile yapılmıştır. Bu türün toplam 484 örneği bulunmuştur. Bunlardan bir kısmı İstanbul ilinin Şile ilçesindeki Kumbaba plajının kumlu-çamurlu tabanında, bir kısmı da Uzunkum plajının kumlu tabanında gözlendi. Deniz yatağının metrekaresi başına düşen birey yoğunluğunun tahmini, Türknil nehrinin ağzına yakın Kumbaba sahilinde ne kadar yüksek sayıda bireyin bulunduğunun vurgulanmasını mümkün kılmıştır. Bu türün Karadeniz'e girişinin doğal yollarla gerçekleşmiş olabileceği ileri sürülebilir. Bu iki nedenden dolayı mümkün olmuş olabilir; Birincisi Şile plajlarının Boğaziçi Kanalı'na birkaç kilometre uzaklıkta olması, diğer nedeni ise Şile ilçesine en yakın B. leachii raporunun türün bölgede gözlemlendiği Ocak 2020'ye kadar uzanmasıdır. Çanakkale Boğazı'nın güney kıyısının deniz yatağı (Çanakkale Boğazı). Belirtilenlerden emin olmak için izlemenin düzenli olarak yapılması gerekir ancak şu anda bu hipotez en gerçekçi hipotez gibi görünmektedir.

Anahtar Kelimeler: Bursatella leachii, Karadeniz, Türkiye, AIS, NIS

Keywords

Bursatella leachii, Karadeniz, Türkiye, AIS, NIS

Ethical Statement

Yazarlar bu çalışma için etik kurul iznine gerek olmadığını beyan ederler.

Supporting Institution

Hiçbiri

Thanks

Hiçbiri

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