Chiers, Koen

Decostere, Annemie

Desender, Marieke

Pollet, Hans

Soetaert, Maarten

Verschueren, Bart

Ghent University Academic Bibliography

Evaluation of the impact of pulse fishery on a selection of North Sea fish & invertebrates 1 Introduction         The application of an electric field (low-frequency, pulsed DC) in a brown shrimp beam trawl was successfully tested on commercial shrimp cutters. Preservation of commercial catches, reduction of bottom contact and discards were the decisive criteria in the evaluation of the electro-trawl. With a modified bobbin rope (10 bobbins compared to 36 in the conventional gear) the increase in commercial shrimp catch was 13,8% (± 10,1% SD). Plaice and whiting by-catch was reduced respectively by 62,0% (± 20,4 % SD) and 32,7% (± 33,1% SD).  Desender Marieke 1,3, Bart Verschueren1, Maarten Soetaert1,2, Hans Polet 1 , Koen Chiers2 & Annemie Decostere3  1 Institute for Agricultural and Fisheries Research (ILVO), Animal Sciences - Fisheries,  Ankerstraat 1, 8400 Oostende, Belgium  2 Department of Pathology, Bacteriology & Poultry Diseases, Faculty of Veterinary Medicine – Ghent University,  Salisburylaan 133 Merelbeke, Belgium   3 Department of Morphology, Faculty of Veterinary Medicine – Ghent University,  Salisburylaan 133 Merelbeke, Belgium   2 Concerns • Haemorrhages, bruises • Spinal injury • Deformations • Mortality  • …         The effect of pulse trawling for  brown shrimp on marine organisms is largely unknown.   3 Short-term Effects of low-frequency pulsed DC Only limited impact in plaice, pogge, armed bullhead, dragonet,  fivebeard rockling, cod and sole   - After exposure for 10s to a 100V/m, 5Hz pulse  -  In heterogeneous  electrical field  ∟ to electrodes                      -  Necropsy and histological examination                                                                                ↓                                                                      - Minor and brief fright reactions                                                  - No mortality or spinal injury                                                  - 0,5% - 1% haemorrhages in resp. sole and plaice    4 Future Research:  To revalue electrofishing, additional information is still needed!                  - Long-term effects                  - Investigate  impact on:        - Invertebrates  & electro sensitive Elasmobranchs                                   - Eggs, larvae and juveniles of cod, sole, sandworm and shrimp                                                                    - By histology, X-ray and behavioural analyses                  - Determine range of safe pulse parameters, enabling legislation of pulse fishing  marieke.desender@Ugent.be                                bart.verschueren@ilvo.vlaanderen.be ? Conventional gear, 36 bobbins Modified gear, 10 bobbins heterogeneous electric field, simulating the situation at sea       Spinal injury, cod ( De Haan 2009)                          Brands, rainbowtrout (Snyder 2003)        

Evaluation of the impact of pulse fishery on a selection of North Sea fish and invertebrates

https://biblio.ugent.be/publication/3159820/file/3159821

Evaluation of the impact of pulse fishery on a selection of North Sea fish and invertebrates

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Ghent University Academic Bibliography