Seasonal discards and by-catch of striped venus clam (Chamelea gallina) (Mollusca, Bivalves) fishery in the black sea

Karadenizin Türkiye kıyılarında beyaz kum midyesi, Chamelea gallina, avcılığı yapan hidrolik direç donanımlı teknelerin mevsimsel ıskarta ve hedef dışı av miktarları tespit edilmiştir. Bu çalışmada kullanılan veriler araştırmacılar tarafından Eylül 2009 ve Nisan 2010 tarihleri arasında ticari av teknelerinden elde edilmiştir. Elde edilen sonuçlara göre Karadenizde hidrolik direçlerin ürettikleri ıskarta miktarları karaya çıkarılan ürünün %36sına tekabül etmektedir ve bunun yaklaşık %19u asgari av boyunun (

Karadeniz de beyaz kum midyesi (Chamelea gallina) avcılığında mevsimsel ıskarta ve hedef dışı av

Seasonal discards and by-catch of hydraulic dredges targeting striped venus clams, Chamelea gallina, from the Black Sea coasts of Turkey were determined. Data presented in this study were collected by researchers aboard between September 2009 and April 2010. Results indicated that discards were 36% of the landed product, of which 19% was composed of undersized (<17 mm) clams. During the study, a total of 38 species were identified and the hermit crab (Diogenes pugilator) and the gastropod Rapana venosa were the two main species captured as discard from all sampling stations in every season. Species diversity and evenness index values, of winter and spring hauls were significantly different from autumn ones.

PDF

___

Alverson, D., Freeberg, M., Murawski, S. and Pope, J. 1994. A Global Assessment of Fisheries Bycatch and Discards. FAO Fisheries Technical Paper 339, Food and Agriculture Organization of the United Nations, Rome, Italy, 233 pp.
Alves, F., Chicharo, L., Nogueira, A. and Regala, J. 2003. Changes in benthic community structure due to clam dredging on algarve coast and the importance of seasonal analysis. Journal of Marine Biological Association of the U.K., 83: 719-729.
Ateş, A.S., Kocataş, A., Katağan, T. and Özcan, T. 2010. An updated list of decapod crustaceans on the Turkish coast with new record of the Mediterranean shrimp, Processa acutirostris Nouvel and Holthuis 1957, (Caridea, Processidae). North-Western Journal of Zoology, 6 (2): 209-217.
Borges, L., Rogan, E. and Officer, R. 2005. Discarding by the demersal fishery in the waters around Ireland. Fisheries Research; 76:1-13. doi:10.1016/j.fishres. 2005.05.011
Bilgin, S., Ateş, A.S. and Çelik, E.Ş. 2007. The Brachyura (Decapoda) Community of Zostera marina Meadows in The Coastal Area of The Southern Black Sea (Sinop Penınsula, Turkey). Crustaceana, 80 (6): 717-730.
Clarke, K.R. 1993. Non-parametric multivariate analysis of changes in community structure. Australian Journal of Ecology, 18: 117-143.
Clarke, K.R. and Warwick, R.M. 1994. Change in marine communities: an approach to statistical analysis and interpretation. Natural Environment Research Council, Plymouth, UK, 114 pp.
Dalgıç, G. and Okumuş, İ. 2006. Clam Fisheries with Hydraulic Dredges in the Black Sea, Proceedings of the First Biannual Scientific Conference Black Sea Ecosystem 2005 and Beyond, 839-847.
Dalgıç, G., Okumuş, İ. and Karayücel, S. 2010. The effect of fishing on growth of the clam Chamelea gallina (Bivalvia: Veneridae) from the Turkish Black Sea coast, Journal of the Marine Biological Association of the United Kingdom, 90(2): 261-265. doi:10.1017/S0025315409000939
Gaspar, M.B., Santos, M.N., Leitão, F., Chícharo, L., Chícharo, A. and Monteiro, C.C. 2003. Recovery of substrates and macro-benthos after fishing trials with a new Portuguese clam dredge. Journal of the Marine Biological Association of the United Kingdom, 83: 713-717. doi:10.1017/S0025315403007690h
Harrington, J.M., Myers, R.A. and Rosenberg, A.A. 2005. Wasted fishery resources: discarded by-catch in the USA. Fish and Fisheries, 6: 350361. doi:10.1111/j. 1467-2979.2005.00201.x
Hauton, C., Atkinson, R.J.A. and Moore, P.G. 2003. The impact of hydraulic blade dredging on a benthic megafaunal community in the Clyde Sea area, Scotland. Journal of Sea Research, 50: 4556. doi: 10.1016/S1385-1101(03)00045-5
Jenkins, S.R., Mullen, C. and Brand, A.R. 2004. Predator and scavenger aggregation to discarded by-catch from dredge fisheries: importance of damage level. Journal of Sea Research, 51: 69-76. doi:10.1016/j.seares. 2003.05.002
Kaiser, M.J., Ramsay, K., Richardson, C.A., Spence, F.E. and Brand, A.R. 2000. Chronic fishing disturbance has changed shelf sea benthic community structure. Journal of Animal Ecology; 69: 494-503. doi: 10.1046/j.1365-2656.2000.00412.x
Kelleher, K. 2005. Discards in the worlds marine fisheries. FAO Fisheries Technical Papers, Rome, 470 pp.
Keskin, Ç. 2010. A review of fish fauna in the Turkish Black Sea. Journal of The Black Sea/Mediterranean Environment, 16(2): 195-210.
Kruskal, J.B. and Wish, M. 1978. Multidimensional Scaling. Sage, Beverley Hills, CA.
Morello, E.B., Froglia, C., Atkinson R.J.A. and Moore, P.G. 2005. Hydraulic dredge discards of the clam (Chamelea gallina) fishery in the western Adriatic Sea, Italy. Fisheries Research, 76: 430-444. doi: 10.1016/j.fishres.2005.07.002
Öztürk, B. and Çevik, C. 2000. Molluscs fauna of Turkish seas. Club Cnchylia Informationen, 32 (1/3): 27-53.
Pranovi, F., Raicevich, S., Franceschini, G., Torricelli, P. and Giovanardi, O. 2001. Discard analysis and damage to non-target species in the rapido trawl fishery. Marine Biology, 139: 863875.
Sanchez, P., Demestre, M. and Martín, P. 2004. Characterization of the discards generated by bottom trawling in the Northwestern Mediterranean. Fisheries Research, 67: 71-80.
Şahin, K.G. and Çınar, M.E. 2012. A check-list of polychaete species (Annelida: Polychaeta) from the Black Sea. Journal of the Black Sea/Mediterranean Environment, 18(1): 10-48.
Tuck, I.D., Bailey, N., Harding, M., Sangster, G., Howell, T., Graham N. and Breen, M. 2000. The impact of water-jet dredging for razor clams, Ensis spp., in a shallow sandy subtidal environment. Journal of Sea Research. 43: 6581. doi:10.1016/S1385-1101(99) 00037-4
TUIK, 2012. Turkish Fishery statistics, Ankara. http://www.tuik.gov.tr/PreTablo.do?tb_id=47andust_id=13(accessed March 04, 2012)