First Report of Predation on Egg Capsules of Invasive Rapa Whelk by Sharpsnout Seabream (Diplodus puntazzo) in the Black Sea

  • Mehmet Aydin
  • Hacer SaglamEmail author


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.


Sharpsnout 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.

Ethical Approval

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.


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Faculty of Marine ScienceOrdu UniversityOrduTurkey
  2. 2.Faculty of Marine ScienceKaradeniz Technical UniversityTrabzonTurkey

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