DISTRIBUTION AND ABUNDANCE OF CRASSOSTREA GIGAS IN RIZE, EASTERN BLACK SEA

Ceylan Y.

ISARC9.INTERNATIONAL DİCLE SCIENTIFIC RESEARCH AND INNOVATION CONGRESS, Diyarbakır, Türkiye, 29 - 30 Temmuz 2025, ss.1-9, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Diyarbakır
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.1-9
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

This study aimed to determine the current status, density, and morphometric characteristics of Crassostrea gigas in fishermen's shelters in Rize province, located on the eastern coast of the Black Sea. Sampling was carried out at five stations between 20–26 June 2025, and a total of 146 individuals were evaluated. Length, width, and weight were measured, and length-weight and width-weight relationships were calculated. The regression analyses yielded R²=0.8364 for the length-weight relationship, and R²=0.8509 for the width-weight relationship. Density was also calculated using 40×40 cm square sampling plots at each station, and the average individual density was determined to be 182.5 ind./m². Higher densities were observed at south-facing stations, suggesting that the orientation factor may have an effect on settlement. The findings indicate that C. gigas is rapidly spreading along the Rize coast and may have potential impacts on the local ecosystem. In this context, regular monitoring studies and invasive species management strategies are recommended.