Selectivity of Spiral Sieve in the Striped Venus Clam Fishery

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Ceylan Y.

ACTA ZOOLOGICA BULGARICA, vol.74, no.4, pp.597-603, 2022 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 74 Issue: 4
  • Publication Date: 2022
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Veterinary Science Database
  • Page Numbers: pp.597-603
  • Recep Tayyip Erdoğan University Affiliated: Yes


Striped Venus clam (Chamelea gallina) fishery is intensively carried out on the Black sea coast of Turkey using a hydraulic dredge. For this reason, this study aimed to determine the selectivity of the spiral sieves used in this fishery and the factors affecting the selectivity depending on the structure of the sieve. Samplings were carried out on the coast of the South Black sea onboard a commercial clam vessel from 3 to 15 December 2019. The covered codend method was applied, and the between haul variations were taken into account by using CC2000 and ECmodel software. Thus, the L50 results of the Standard Sieving Process (SSP), Cycle per minute (CPM), and Flow rate (FR) were determined as 15.17 mm, 15.49 mm, and 17.06 mm, respectively. Besides, only one factor (FR) affects selectivity. The SR values were found to be quite high for all sieving processes. The proportion of individuals below the minimum legal size in landed catches was determined as quite high. Therefore, the design of a new different sorting sieve system would be more appropriate for striped Venus clam fishery.