Naslov
Other records of Melibe viridis (Kelaart, 1858) in the southeastern Adriatic Sea

Autori
Glamuzina, Luka ; Grđan, Sanja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts 58th Croatian & 18th International Symposium on Agriculture / Carović-Stanko, Klaudija ; Širić, Ivan - Zagreb : Agronomski fakultet Sveučilišta u Zagrebu, 2023, 153-153

Skup
58th Croatian & 18th International Symposium on Agriculture

Mjesto i datum
Dubrovnik, Hrvatska, 11.02.2023. - 17.03.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Melibe viridis ; Bistrina Bay ; new records ; southeastern Adriatic Sea

Sažetak
Melibe viridis (Kelaart, 1858) is a nudibranch native to the waters of the western Indo-Pacific. It was first recorded in the Mediterranean Sea in 1970, where it presumably entered through the Suez Canal. The first record of this species in the Adriatic was in October 2001 in the bay of Stari Grad on the island of Hvar. After that, its occurrence was reported in 2004 near the town of Herceg Novi (Montenegro). Reproductive specimens were detected in October 2014 in the bay of Boka Kotorska (Montenegro), where two adults were found spawning at a depth of three meters. In this paper, further records in the southeastern Adriatic Sea are described. The study area is located in Bistrina Bay, a part of Mali Ston Bay, which is an area protected at the national level as a Special marine reserve. The hydrological and ecological conditions in Bistrina Bay depend largely on the influences of the mainland and the strong underwater freshwater springs in the inner part of the bay. In addition to the high biodiversity, this area has been important for shellfish farming since Roman times. Currently, Mali Ston Bay has the highest production of the European flat oyster, Ostrea edulis in the Mediterranean. M. viridis was first sighted in Bistrina Bay on 11 November 2021, with two specimens crawling near to the freshwater spring below the shore. On November 15, two 50-meter belt transects were established parallel to the shoreline. The transects were placed five meters from the shore at a depth of four meters on a sandy, muddy bottom. The number of specimens and their spawn was noted by a diver along each transect and recorded on video covering a 50 x 2 m area. A total of 20 specimens and 22 egg ribbons were recorded in both transects, indicating massive spawning. The average length of the specimens recorded during this survey was 17.75 ± 5.46 cm, with the largest specimen measuring 27.00 cm and the smallest 10.00 cm. The finding that this species continues to expand and establish viable populations throughout the Adriatic Sea highlights the need for continued monitoring of areas that provide important ecosystem services.

Izvorni jezik
Engleski

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