RAPA WHELK (Rapana venosa Valenciennes, 1846) FISHERY ALONG THE TURKISH COAST OF THE BLACK SEA

Year 2016, , 85 - 96, 18.01.2016

Mehmet Aydın , Ertuğ Düzgüneş Uğur Karadurmuş

https://doi.org/10.3153/JAEFR16011

Abstract

In
this study, the current situation of an invasive gastropod rapa whelk fishery
with dredges and hookah systems were comparatively evaluated. On the other
hand, a socio-economic analysis was conducted to evaluate the hookah (diving)
system via face to face interviews. There were 207 vessels legally operating in
the research area for whelk fisheries 108 of which were using the hookah
system. Mean length and engine power of the hookah vessels were 8.8 m and 65
HP, respectively. It was also found that the average CPUE   was 1050 kg/day and income rate was 79%,
suggesting that whelk fishing had a high economic gain. Each of the hookah
vessels provided an employment to average 3 individuals. According to the
results, mean lengths of whelks harvested with dredges and hookah vessels were
5.61 cm and 5.83 cm, respectively. Length-weight relationship of the total
production was determined as W=0.0223L^2.965 (R²=0.85). It
was concluded that the hookah system is more environmentally friendly method
for the ecosystem than dredges. 

Keywords

Rapana venosa, Black Sea, Dredging, Hookah systems

References

• Alparslan, M., Ozalp, H.B., & Sagır-Odabasi, S., (2006). An invader-economical gastropod Rapana venosa (Valenciennes, 1846) in Canakkale and adjacent regions, Ege Uni¬versity Journal of Fisheries and Aquatic Sciences, 23(3-4), 485-487.
• Altınagac, U., Ayaz, A., & Kara, A., (2004). A pre¬liminary study on the whelk fisheries (Rapana venosa (Valenciennes, 1846)) us¬ing lift nets of various sizes, Ege Universi¬ty Journal of Fisheries and Aquatic Sci¬ences, 21, 295-299.
• Artuz, M.I., (1989). “Rapana” The Last Invader. Cumhuriyet science and technology. No:147.
• Aydın, C., Gurbe, R., & Ulaş, A., (2005). Catch composition and effects on fishing area of beam trawl, Ege University Journal of Fisheries and Aquatic Sciences, 22(1-2), 39-42.
• Bagenal, T.B., (1978). Methods for Assessment of Fish Production in Fresh Waters. 3rd Ed., Handbook No:3. Blackwell Scientific Publication. Oxford. 365 pp.
• Bilecik, N., (1990). Distribution of rapa whelk (Rapana venosa) in the Black Sea coastal of Turkey and effect on Black Sea fisher¬ies. Bodrum Fisheries Institute publication (In Turkish).
• Bombace, G., Fabi, G., Fiorentini, L., & Speranza, S., (1994). Analysis of the Efficacy of Ar-tificial Reefs Located in Five Different Ar¬eas of the Adriatic Sea. Fifth International Conference on Aquatic Habitat Enhance¬ment, Bulletin of Marine Science, 55: 559-580.
• Cesari, P., & Pellizzato, M., (1985). Insediamento Nella Laguna di Venezia e Distribuzione Adriatica di Rapana venosa (Valenci¬ennes) (Gastropoda, Thaididae). Lavori, Societa Veneziana di Scienze Naturale, 10, 3-16.
• Celik, O., & Samsun O., (1996). Investigation of the catch amount and the catch composition of dredges with various design features, Ege University Journal of Fisheries and Aquat¬ic Sciences, 13, 259-272.
• Daskalov, G., & Rätz, H.J., (2011). Assessment of Black Sea Stocks. JRC Scientific, Tech¬nical and Economic Committee for Fisher¬ies (STECF), Italy, 216pp.
• Duzgunes, E., Sahin, C., Bascinar, N.S., & Emiral, H., (1997). Sea snail fishing and its effects on the coastal ecosystem of the Black Sea, Turkey. 1. National Conference on Turkish Coasts, 24-27 June 1997.
• Duzgunes, E., (2001). Rapa Whelk fisheries with dredges in the Eastern Black Sea. Techno-logical advances in fisheries, 19-21 June, 106 pp.
• Duzgunes, E., Unsal, S., & Feyzioglu, M., (1992). Stock Assessment of veined whelk Rapana thomasiana (Gross, 1861) in Eastern Black Sea. Project number. DEBAG 143/G. p.55, Karadeniz Technical University, Sürmene Marine Sciences Faculty.
• Emiral, H., (2003). Bio-ecology of Rapa Whelk (Rapana thomasiana) in the Black sea. PhD Thesis. Karadeniz Technical Univer¬sity Institute of Science, 88pp.
• Erdoğan Sağlam, N., Sağlam, C., & Sağlam Demir, Y., (2015). Determination of some population parameters of the veined rapa whelk (Rapana venosa) in the Central Black Sea. Journal of the Marine Biological Association of the United Kingdom, 95(1), 123-129.
• Erkoyuncu, I., (1995). Fisheries Biology and Population Dynamics. Ondokuz Mayıs University publication, 265 pp.
• FIS., (2012). General Directorate of Fisheries and Aquaculture. Fisheries Information Sys¬tem.
• Iotov, I.M., (2011). Report on current and future management of Black Sea fisheries Com¬mittee on Fisheries Rapporteur: Iliana Ma¬linova Iotov, Plenary sitting, A7-0236/2011, 17.6.2011, (2010/2113(INI)) European Parliament, 2009-2014.
• Knudsen, S., & Zengin, M., (2006). Multidiscipli¬nary Modeling of Black Sea Fisheries: A case study from Samsun, Turkey. Black Sea Ecosystem 2005 and Beyond 1st Bian¬nual Scientific Conference BSERP/BSC, 8-10 May 2006 Istanbul, Turkey.
• Koutsoubas, D., & Voultsiadou-Koukoura, E., (1990). The Occurrence of Rapana venosa (Valenciennes, 1846) (Gastropoda, Thai¬dide) in the Aegean Sea, Boll. Malacologi¬co, 26, 201-204.
• Le Cren, E.D., (1951). The length-weight rela¬tionships and seasonal cycle in gonad weight and condition in perch (Perca flu¬viatilis), Journal of Animal Ecology, 20, 210-219.
• Pauly, D., (1980). A selection of simple methods for the assessment of tropical fish stocks. FOA Fish Circular. No. 729. Rome. 54 pp.
• Rinaldi, E., (1985). Rapana venosa (Valenci¬ennes) Spiaggiata in Notevole quantita Sulla Spiaggia di Rimini (FO). Bollettino Malacologico, 16, 9-17.
• Saglam, H., Kutlu, S., Dagtekin, M., Bascınar, N. S., Selen, H., & Sahin, A., (2008). Develop-ment of different trap models as alternative dredges for rapa whelk fisheries. Technical final report. Trabzon Fisheries Research Institute, 94 pp.
• Sparre, P., & Venema, S.C., (1992). Introduction to Tropical Fish Stock Assessment, Part I. FAO Fisheries Technical Paper, 306/1, Rome, 376 pp.
• Sahin, C., Duzgunes, E., Engin, S., Mutlu, C., & Hacimurtazaoglu, N., (2005). Analysis of Age and Growth Parameters of Rapa Whelk (Rapana thomasiana), Turkish Journal of Aquatic Life, 4, 34-38.
• TUIK., (2012). Year Book of Turkish Fisheries Statistics (1983-2012). Turkish Statistics Association, Prime Ministry. Ankara.
• Unsal, S., (1989). Evaluation of biological char¬acteristics, nutritional value and diet for Rapana thomasiana in the Eastern Black Sea region. Karadeniz Technical Universi¬ty Surmene Marine Science High School, Technical Report, 47pp. (In Turkish).
• Zar, J.H., (1996). Biostatistical Analysis, 3rd ed. Prentice-Hall, Englewood Cliffs, NJ, USA.
• Zengin, M., (2006). Effects of the Trawl and Snail Fisheries on the Resources of Ben¬thic Macro Fauna in the Middle Black Sea Coast, Samsun, Turkey. 1st Biannual Sci¬entific Conference. Black Sea Ecosystem 2005 and Beyond 1st Biannual Scientific Conference BSERP/BSC, 8-10 May 2006 Istanbul, Turkey.