First Report of Predation on Egg Capsules of Invasive Rapa Whelk by Sharpsnout Seabream (Diplodus puntazzo) in the Black Sea
- 3 Downloads
The presence of the egg capsules of Rapa whelk, Rapana venosa, in the stomachs of sharpsnout seabream was observed for the first time. Samples were collected on August, 2017 in the Artvin, Hopa region (Black sea of Turkey). Rapa whelk is one of the successful invasive species in the world. Due to high predation pressure on native mussels by invasive whelk in the Black Sea, their populations decreased. Female rapa whelks lay high amount of egg capsules on hard substratum (stones, mussels, whelks etc) during summer. The sharpsnout seabream seems to be an important predator on egg capsules of Rapa whelk due to both species shared same habitat in summer months.
KeywordsSharpsnout seabream Egg capsules of Rapa whelk Black Sea
This study was funded by Ordu University Scientific Research Project (grant agreement no. 1735).
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
All applicable international, national and/or institutional guidelines for the care and use of animals were followed by the authors.
Sampling and Field Studies
All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities.
- Bauchot ML, Hureau JC (1986) Sparidae. In: Check-list of the Fishes of the Eastern Tropical Atlantic. Clofeta II. (J.C. Hureau, C. Karrer, A. Post & L. Saldanha eds), pp. 790–812.UNESCO: ParisGoogle Scholar
- Bonelli AG, Giachetti CB, Jaureguizar AJ, Milessi AC (2016) First report of predation by a small shark on the invasive rapa whelk Rapana venosa (Valenciennes, 1846) in Argentinean waters. Bioinvasions Rec 5(3):169–172Google Scholar
- Carranza A, Estrades A, Scarabino F, Segura A (2011) Loggerhead turtles Caretta caretta (Linnaeus) preying on the invading gastropod Rapana venosa (Valenciennes) in the Rıo de la Plata Estuary. Mar Ecol-Evol Persp 32(2):142–147Google Scholar
- Drapkin E (1963) Effect of Rapana bezoar Linne (Mollusca, Muricidae) on the Black Sea fauna, pp. 700–703. Doklady Akademii Nauk SRR, Russia.Google Scholar
- Emiral H (1997) Egg mass, intra capsular and extracapsular larval development of Rapa whelk, Rapana thomasiana GROSS, 1861, from the eastern Black Sea Region. MSc Thesis, Institute of Natural Sciences, TrabzonGoogle Scholar
- Harding JM (2003) Predation by blue crabs, Callinectes sapidus, on rapa whelks, Rapana venosa: possible natural controls for an invasive species? J Exp Mar Biol Ecol 297:161–177Google Scholar
- Jardas I (1996) Jadranska ihtiofauna. Školska knjiga: Zagreb. 553 pp. (in Croatian)Google Scholar
- Karadurmus U (2013) An investigation on bio-ecological characteristics of warty crab (Eriphia verrucosa forskal, 1775) in the Ordu region. University of Ordu. Institute for Graduate Studies in Natural and Technology. Master thesis. 54pGoogle Scholar
- Kraljević M, Matić-Skoko S, Ducić J, Pallaoro A, Jardas I, Glamuzina B (2007) Age and growth of sharpsnout seabream Diplodus puntazzo (Cetti, 1777) in the eastern Adriatic Sea. Cah Biol Mar 48:145–154Google Scholar
- Micu D, Todorova V (2007) Biodiversity of the Western Black Sea. MarBEF Newsletter:26–28Google Scholar
- Saglam H, Duzgunes E (2014) Rapa whelk (Rapana venosa Valenciennes, 1846) Fisheries in the Black Sea. In: Duzgunes E, Ozturk B, Zengin M (eds) Turkish Fisheries in the Black Sea. Published by TUDAV, Publication number: 40, İstanbul, pp 361–395Google Scholar
- TUIK (2017) Turkish fisheries statistics, Ankara TurkeyGoogle Scholar
- Zolotarev V (1996) The Black Sea ecosystem changes related to the introduction of new mollusc species. PSZNI: Mar Ecol 17:227–236Google Scholar