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Effect of a fishing closure on Chamelea gallina stocks along the Turkish coast

Published online by Cambridge University Press:  31 January 2023

Murat Dağtekin Open the ORCID record for Murat Dağtekin [Opens in a new window] ,
Göktuğ Dalgıç ,
Murat Erbay ,
İlkay Özcan Akpinar ,
Mehmet Aydın Open the ORCID record for Mehmet Aydın [Opens in a new window] ,
Süleyman Özdemir ,
Sedat Karayücel  and
Caner Enver Özyurt
Murat Dağtekin*
Affiliation:
Fisheries Management Department, Central Fisheries Research Institute, Trabzon, Turkey
Göktuğ Dalgıç
Affiliation:
Fisheries Faculty, Recep Tayyip Erdoğan University, Rize, Turkey
Murat Erbay
Affiliation:
Fisheries Management Department, Central Fisheries Research Institute, Trabzon, Turkey
İlkay Özcan Akpinar
Affiliation:
Fisheries Management Department, Central Fisheries Research Institute, Trabzon, Turkey
Mehmet Aydın
Affiliation:
Fatsa Faculty of Marine Sciences, Ordu University, Ordu, Turkey
Süleyman Özdemir
Affiliation:
Fisheries Faculty, Sinop University, Sinop, Turkey
Sedat Karayücel
Affiliation:
Fisheries Faculty, Sinop University, Sinop, Turkey
Caner Enver Özyurt
Affiliation:
Fisheries Faculty, Çukurova University, Adana, Turkey
*
Author for correspondence: Murat Dağtekin, E-mails: muratdagtekin@tarimorman.gov.tr; muratdagtekin998@gmail.com
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Abstract

The striped venus clam Chamelea gallina (SVE), plays an important role as an infaunal filter-feeder in the ecosystem, besides an important economic role in the Black Sea coasts of Turkey. It is caught using hydraulic dredge boats, then processed, and the final product (frozen meat) is exported to EU countries. SVE fishing requires a special licence and regulations. Also, SVE beds were closed to fisheries for the recovery of stocks for 2 years. In the study, SVE beds were investigated during the closed season over two years to assess stock density. Additionally, the number of macrobenthic species that share the same habitat as the SVE was determined. The sampling area was divided into five sub-areas and four strata by depth and then stratified random sampling was applied to collect data. In 2011, SVE stock sizes in the sub-areas were 11,723.58 ± 5167.262 tons (Cide), 35,082.94 ± 27,510.95 tons (İnebolu), 10,077.05 ± 4970.68 tons (Türkeli), 3304.36 ± 3215.1 tons (Ayancık) and 1431.3 ± 1703.5 tons (Sarıkum). In 2012, these estimated stocks were 13,820.41 ± 6977.86 tons, 34,841.94 ± 14,623.71 tons, 8148.27 ± 5006.74 tons, 3420.72 ± 3093.67 tons and 2023.74 ± 2832.63 tons, respectively. However, the estimated SVE total biomass did not change significantly during the period when the fields were closed (P > 0.05). The results indicate that length-weight relationship parameters varied of b from 2.9011–2.9072 in two years. Shell damage during fishing, environmental factors, food competition and consumption by the main predator all have a significant impact on stock densities, and changes occurring in these conditions should be considered in fisheries management.

Keywords

BiomassBlack SeaChamelea gallinafishing closuregrowth parameters
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 103 , 2023 , e11
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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