Observations of juvenile sandbar sharks Carcharhinus plumbeus (Nardo, 1827) around the Bojana River delta (Southern Adriatic Sea)


ILIJA ĆETKOVIĆ
PATRICK L. JAMBURA
https://orcid.org/0000-0002-4765-5042
ANA PEŠIĆ
https://orcid.org/0000-0002-8669-6744
ZDRAVKO IKICA
https://orcid.org/0000-0003-3157-0500
ALEKSANDAR JOKSIMOVIĆ
https://orcid.org/0000-0002-0796-4641
Abstract

The sandbar shark (Carcharhinus plumbeus) is considered rare in the Adriatic Sea and the majority of records originate from the northern Adriatic, where a nursery area for this species close to the Po delta system has been repeatedly proposed. This study provides 5 new records and analyses the previously published records of sandbar sharks recorded around the delta of the River Bojana (in Montenegro, in the south-eastern Adriatic). The River Bojana located on the border between Montenegro and Albania, is the second largest river flowing into the Adriatic Sea, where it forms a highly productive ecosystem already known as a local hotspot for smooth-hound sharks (Mustelus spp.). New records of sandbar sharks have emerged as a result of citizen science (a social media survey) and direct reports from fishermen. The total length of C. plumbeus juveniles ranged from approximately 800 mm to 1100 mm, and most (n=5) were caught by set gillnets. The data presented here show that juveniles are consistently present around the estuary and indicate the importance of this fragile estuarine ecosystem for sandbar sharks. Additionally, this study also provides morphometric data collected from a single individual.

Article Details
  • Rubrik
  • Short Communication
Downloads
Keine Nutzungsdaten vorhanden.
Autor/innen-Biografie
PATRICK L. JAMBURA, Evolutionary Research Group, Department of Palaeontology, Faculty of Earth Sciences, Geography and Astronomy, University of Vienna, Josef-Holaubek-Platz 2, 1090 Vienna, Austria



Literaturhinweise
Bass, A.J., 1978. Problems in studies of sharks in the Southwest Indian Ocean. p. 545-594. In: Sensory biology of sharks, skates and rays. Hodgson, E.S., Mathewson, R.F. (Eds). Office of Naval Research, Department of the Navy, Arlington, Virginia.
Başusta, N., Başusta, A., Ozyurt, C.E., 2021. Evidence of a second nursery area of the sandbar shark, Carcharhinus plumbeus (Nardo, 1827) in the Eastern Mediterranean Sea. Mediterranean Marine Science, 22 (1), 20-26.
Cattano, C., Turco, G., Di Lorenzo, M., Gristina, M., Visconti, G. et al., 2021. Sandbar shark aggregation in the central Mediterranean Sea and potential effects of tourism. Aquatic Conservation: Marine and Freshwater Ecosystems, 31 (6), 1420-1428.
Ćetković, I., 2018. Composition and abundance of shark bycatch in Montenegrin fisheries. Montenegrin Ecologists Society and Environmental Programme, Podgorica, 37 pp.
Collatos, C., Abel, D.C., Martin, K.L., 2020. Seasonal occurrence, relative abundance, and migratory movements of juvenile sandbar sharks, Carcharhinus plumbeus, in Winyah Bay, Carolina. Environmental Biology of Fishes, 103 (7), 859-873.
Compagno, L.J., 2001. Sharks of the World: Bullhead, mackerel, and carpet sharks (Heterodontiformes, Lamniformes, and Orectolobiformes). Vol.2. Food & Agriculture Organization, Rome, 269 pp.
Costantini, M., Affronte, M., 2003. Neonatal and juvenile sandbar sharks in the northern Adriatic Sea. Journal of Fish Biology, 62 (3), 740-743.
Dragičević, B., Dulčić, J., Lipej, L., 2010. On the record of the sandbar shark Carcharhinus plumbeus Nardo, 1827 (Carcharhiniformes: Carcharhinidae) in the middle Adriatic Sea. Acta Adriatica: International Journal of Marine Sciences, 51 (2), 227-232.
Dulvy, N.K., Allen, D.J., Ralph, G.M., Walls, R.H.L., 2016. The conservation status of sharks, rays and chimaeras in the Mediterranean Sea. IUCN Centre for Mediterranean Cooperation, Malaga, 14 pp.
Ferretti, F., Walls, R.H.L., Musick, J., Stevens, J., Baum, J.K. et al., 2016. Carcharhinus plumbeus. The IUCN Red List of Threatened Species. https://www.iucnredlist.org/species/ 3853/16527809 (Accessed 21 March 2022)
Heupel, M.R., Carlson, J.K., Simpfendorfer, C.A., 2007. Shark nursery areas: concepts, definition, characterization and assumptions. Marine Ecology Progress Series, 337, 287-297.
Jambura, P.L., Ćetković, I., Kriwet, J., Türtscher, J., 2021. Using historical and citizen science data to improve knowledge about the occurrence of the elusive sandbar shark Carcharhinus plumbeus (Chondrichthyes-Carcharhinidae) in the Adriatic Sea. Mediterranean Marine Science, 22 (1), 169.
Kovačić, M., Lipej, L., Dulčić, J., 2020. Evidence approach to checklists: critical revision of the checklist of the Adriatic Sea fishes. Zootaxa, 4767 (1), 1-55.
Lipej, L., Mavrič, B., Dobrajc, Ž., Capapé, C., 2008. On the occurrence of the sandbar shark, Carcharhinus plumbeus (Chondrichthyes: Carcharhinidae) off the Slovenian coast (northern Adriatic). Acta Adriatica: International Journal of Marine Sciences, 49 (2), 137-145.
Nardo, J.D., 1827. Prodromus observationum et disquisitionum Adriaticae ichthyologiae. Giornale di Fisica, Chimica, Storia Naturale, Medicina ed Arti, Pavia 10, 22-40.
Pešić, A., Ikica, Z., Đurović, M., Marković, O., Joksimović, A., 2021. Marine Fisheries in Montenegro: History, Tradition, and Current State. p. 249-271. In: The Montenegrin Adriatic Coast.
Joksimović, A., Đurović, M., Zonn, S. I., Kostianoy, G. A., Semenov, V. A. (Eds). Springer, Heidelberg. Petković, S., Sekulić, G., 2019. Erosion and sedimentation processes in the Bojana River Delta at the Adriatic Sea. Journal of Coastal Conservation, 23 (1), 39-47.
Serena, F., 2005. Field identification guide to the sharks and rays of the Mediterranean and Black Sea. Food and Agriculture Organization, Rome, 97 pp.
Serena, F., Abella, A. J., Bargnesi, F., Barone, M., Colloca, F. et al., 2020. Species diversity, taxonomy and distribution of Chondrichthyes in the Mediterranean and Black Sea. The European Zoological Journal, 87 (1), 497-536.
Šilc, U., Stevanović, Z. D., Ibraliu, A., Luković, M., Stešević, D., 2016. Human impact on sandy beach vegetation along the southeastern Adriatic coast. Biologia, 71 (8), 865-874.
Šilc, U., Stešević, D., Luković, M., Caković, D., 2020. Changes of a sand dune system and vegetation between 1950 and 2015 on Velika plaža (Montenegro, E Mediterranean). Regional Studies in Marine Science, 35, 101139.
Stešević, D., Küzmič, F., Milanović, Đ., Stanišić-Vujačić, M., Šilc, U., 2020. Coastal sand dune vegetation of Velika plaža (Montenegro). Acta Botanica Croatica, 79 (1).
Zemah Shamir, Z., Zemah Shamir, S., Tchernov, D., Scheinin, A., Becker, N., 2019. Shark Aggregation and Tourism: Opportunities and Challenges of an Emerging Phenomenon. International Journal of Sustainable Development & World Ecology, 26 (5), 406-414.
Am häufigsten gelesenen Artikel dieser/dieses Autor/in