SavedAdd your journal

Journals / Marine Science and Technology Bulletin / 2020 / Cilt: 9 - Sayı: 2

An Adapted Slipping Process to Exclude Jellyfish in the Sea of Marmara Purse Seine Fishery

Nazlı KASAPOĞLU
ZAFER TOSUNOĞLU
Gökhan GÖKÇE
Pages
75–82
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In conclusion, this study is extended completely the Sea of Marmara practised to understand the dimensions of jellyfish amount and slipping process.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Excluding the jellyfish from the bunt-end is a common slipping process used in the Sea of Marmara purse seine fishery.
📊
Key Findings & Data:There were eight successful purse seine operations conducted between 8 and 11 September 2018 in depth ranged 77 to 677 m.
💡
Conclusion & Impact:In conclusion, this study is extended completely the Sea of Marmara practised to understand the dimensions of jellyfish amount and slipping process.
🔬Design:Research Article
📍Scope:2018 Verileri
⚙️Variables:Jellyfish · Slipping process · Purse seine

Abstract

Excluding the jellyfish from the bunt-end is a common slipping process used in the Sea of Marmara purse seine fishery. For this aim, a sheet of netting piece, larger mesh size and thicker diameter, is rigged on the bunt-end of the purse seine net. The jellyfish mass on the netting piece are slipped by rolling over the headline (floating line) after partially hauling or drying-up the net while it is still in the water. In this study, the catch amount of this slipping was roughly estimated with the introduction of the slipping process only used by the purse seiners in the Sea of Marmara. There were eight successful purse seine operations conducted between 8 and 11 September 2018 in depth ranged 77 to 677 m. The percentage of landed species versus to jellyfish varied between 23% and 85%. The mean landed anchovy amount is 4379 (3756.6) kg for per operation. The mean slipped amount of jellyfish is 3812.5 (2404.4) kg. However, both anchovy (99.8%) and jellyfish (96.3%) are the vast majority species that landed and slipped, respectively. In the operations totally 100 boxes of anchovy (1180 kg) unintentionally was slipped with the jellyfish. In addition, two sharks with larger size were slipped to the sea as alive over the floating line of the net. Although slipping practised rarely in Turkey, all the purse seiner in the Sea of Marmara have to use the adapted slipped process to get rid of jellyfish. However, there are no records and scientific findings regarding slipped amount of the jellyfish. For this reason, this study is important to presented preliminary results regarding amount of the jellyfish. In conclusion, this study is extended completely the Sea of Marmara practised to understand the dimensions of jellyfish amount and slipping process.

🔖

Cite This Article

KASAPOĞLU, N., TOSUNOĞLU, Z., GÖKÇE, G. (2020). An Adapted Slipping Process to Exclude Jellyfish in the Sea of Marmara Purse Seine Fishery. Marine Science and Technology Bulletin, Cilt: 9 - Sayı: 2, 75–82. https://ajindex.com/articles/341491

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (8)

  1. Breen, M., Isaksen, B., Ona, E., Pedersen, A. O., Pedersen, G., Saltskår, J., Svardal, B., Tenningen, M., Thomas, P. T., Totland, B., Øvredal, J. T. & Vold, A. (2012). A review of possible mitigation measures for reducing mortality caused by slipping from purse-seine fisheries. ICES CM 2012/C: 12. Daskalov, G. M., Grishin, A. N., Rodionov, S. & Mihneva, V. (2007). Trophic cascades triggered by overfishing reveal possible mechanisms of ecosystem regime shifts. Proceedings of the National Academy of Sciences, 104: 10518-10523.
  2. Handegard, N. O., Tenningen, M., Howarth, K., Anders, N., Rieucau, G. & Breen, M. (2017). Effects on schooling function in mackerel of sub-lethal capture related stressors: Crowding and hypoxia. PLoS ONE, 12(12): e0190259. https://doi.org/10.1371/journal.pone.0190259
  3. Huse, I., & Vold, A. (2010). Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine. Fisheries Research, 106: 54-59. https://doi.org/10.1016/j.fishres.2010.07.001
  4. İşinibilir, M. & Yılmaz, İ. N. (2016). Jellyfish species in the Sea of Marmara (pp. 390-400).
  5. In E. Özsoy, M. N. Çağatay, N. Balkıs, N. Balkıs, B. Öztürk (Eds.), The Sea of Marmara: Marine Biodiversity, Fisheries, Conservation and Governance. Istanbul: Turkish Marine Research Foundation (TUDAV), Publication No. 42. Lockwood, S. J., Pawson, M. G. & Eaton, D. R. (1983). The effects of crowding on mackerel (Scomber scombrus L.) - Physical condition and mortality. Fisheries Research, 2: 129-147. https://doi.org/10.1016/0165-7836(83)90114-5
  6. Marçalo, A., Breen, M., Tenningen, M., Onandia, I., Arregi, L. & Gonçalves, J. M. S. (2019). Mitigating slipping-related mortality from purse seine fisheries for small pelagic fish: case studies from European Atlantic waters (pp. 297-318).
  7. In S. S. Uhlmann, C. Ulrich, S. J. Kennelly (Eds), The European Landing Obligation. Switzerland: Springer Nature. Marçalo, A., Guerreiro, P. M., Bentes, L., Rangel, M., Monteiro, P., Oliveira, F., Afonso, C. M. L., Pousão-Ferreira, P., Benoît, H. P., Breen, M., Erzini, K. & Gonçalves, J. M. S. (2018). Effects of different slipping methods on the mortality of sardine, Sardina pilchardus, after purse-seine capture off the Portuguese Southern coast (Algarve). PLoS ONE, 13(5): e0195433. https://doi.org/10.1371/journal.pone.0195433
  8. Marçalo, A., Marques, T. A., Araújo, J., Pousão-Ferreira, P., Erzini, K. & Stratoudakis, Y. (2010). Fishing simulation experiments for predicting the effects of purse-seine capture on sard