FEBBE-3 LEG2

Type Oceanographic cruise
Set This cruise is part of the set FEBBE
Ship Thalia
Ship owner Ifremer
Dates 09/06/2014 - 15/06/2014
Chief scientist(s) LAFFARGUE Pascal ORCID

ÉCOLOGIE ET MODÈLES POUR L'HALIEUTIQUE

Centre Ifremer de Nantes

Rue de l'Ile d'Yeu

BP 2105

44311 Nantes Cedex 3

+33 (0)2 40 37 41 67

DOI 10.17600/14008800
Objective Bottom trawling subjects benthic habitats and communities in the Bay of Biscay (BoB) to constant pressure. Few efforts have been made to reduce the physical impacts on ecosystems caused by intensive fisheries (discards, mortality of non-commercial benthic organisms and denaturing of habitats). Knowledge is vital in the context of developing both sustainable fisheries practices which create less damage to the communities exploited and strategic plans to assess the status of marine ecosystems and develop effective management measures. The FEBBE-3 Leg 1 and 2 cruises followed on from the FEBBE-1 & 2 cruises, with the main objective of collecting data on the effects of bottom trawls on the habitat and structure of benthic communities. The series of FEBBE cruises is part of the European BENTHIS project aiming to assess the impacts of bottom trawling on various European marine ecosystems and to develop and/or test alternatives to the most harmful practices. The major physical impact of fishing gear involves the alteration of the sea floor and re-suspension of sediments. FEBBE-1 & 2 (2013) provided an initial description of the sediments encountered and their reworking depending on different levels of fishing effort. FEBBE-3's objectives are to quantify the direct impact of 2 types of fishing gear on the sea bed (validating numerical models and quantifying the thicknesses of reworked sediments), assess contributions of different parts of trawls and describe the behaviour of re-suspended sediments. Detailed examination of sediment morphology using imagery at different periods of the year in the 2 targeted areas (zones A and B) will make it possible to evaluate the persistence of physical impacts observed on the bottom. A biological strand will complement these observations, with the main aim of assessing induced mortality of benthic species and their distribution on the sea bed after a trawl has passed.

Data managed by SISMER

Bibliography

Publications

Mengual Baptiste, Cayocca Florence, Le Hir Pierre, Draye Robin, Laffargue PascalORCID, Vincent BenoitORCID, Garlan Thierry (2016). Influence of bottom trawling on sediment resuspension in the 'Grande-Vasière' area (Bay of Biscay, France). Ocean Dynamics, 66(9), 1181-1207. Publisher's official version : https://doi.org/10.1007/s10236-016-0974-7 , Open Access version : https://archimer.ifremer.fr/doc/00353/46428/


References of Technical Reports

Sala Antonello, Nielsen Rasmus, Polet Hans, Laffargue PascalORCID, Smith Chris, Zengin Mustafa, Rijnsdorp Adriaan (2016). Report on technological innovations and management scenario’s to mitigate fishing impacts on the benthic ecosystem and their socio-economic consequences in regional seas. BENTHIS Deliverable 7.9. https://archimer.ifremer.fr/doc/00425/53635/


Sala Antonello, Nielsen J. Rasmus, Rijnsdorp Adriaan D., Polet Hans, Laffargue PascalORCID, Smith Chris, Zengin Mustafa (2016). Report on results of sea trials in the regional seas. BENTHIS Deliverable 7.8. https://archimer.ifremer.fr/doc/00425/53649/