What are the factors driving long-term changes of the suprabenthos in the Seine estuary?

International audienc

Revisited Syllidae of the English Channel coarse sediment communities

International audienc

Records of two introduced Penaeidae (Crustacea: Decapoda) species from Le Havre Harbour

International audienceTwo introduced prawn Penaeidae were collected in Le Havre Harbour, Normandy, France, on 14 August 2016:Marsupeanaeus japonicus (Bate, 1888) and Penaeus semisulcatus De Haan, 1844. M. japonicus is native to the Indo-Pacificand the Red Sea, is already present in the western English Channel; and this is the first record for the eastern part of theEnglish Channel. The catch of P. semisulcatus represents the first confirmed European recor

Benthic ecological status of Algerian harbours

International audienc

Contrôle de surveillance benthique de la Directive Cadre sur l’Eau (2000/60/CE). Volume II : Flore autre que phytoplancton, Année 2017. District Seine-Normandie

This report presents results of the monitoring actions carried out in 2017 (on flora other than phytoplankton) in the water bodies of the Seine-Normandie water district.Ce rapport présente les résultats des opérations menées en 2017 (contrôle de surveillance de la flore autre que phytoplancton) sur l’ensemble des masses d’eau côtières et de transition rattachées au district Seine-Normandie

A well established population of the Atlantic blue crab <i>Callinectes sapidus</i> (Rathbun, 1896) in the English Channel?

(IF 0.46 [2018]; Q4)International audienceIn October 2017 and February 2018, two ovigerous females of Callinectes sapidus were collected in the Bay of Seine, Normandy. Occurrences of ovigerous females of the blue crab at different localities of the bay suggest that the population is well established in the English Channel.Une population bien établie du crabe bleu d'Atlantique Callinectes sapidus (Rathbun, 1896) dans la Manche. En octobre 2017 et février 2018, deux femelles ovigères de Callinectes sapidus ont été échantillonnées en baie de Seine, Normandie. Ces nouvelles observations suggèrent qu'une population du crabe bleu est bien établie en Manche

Effects of clam rake harvesting on the intertidal Ruditapes habitat of the English Channel

International audienceRecreational and professional clam fishing was an important activity on the extensive intertidal zone of the western Cotentin coast (western English Channel). A variety of fishing gear was used to harvest the target species: the European clam Ruditapes decussatus (Linnaeus, 1758) and the introduced Manila clam R. philippinarum (Adams and Reeve, 1850). In this study, we studied the effect of rake harvesting during the spring tides of February–March 2014, following an experimental design with a control station and three stations impacted by rake harvesting in three sediment types: sandy, gravelly, and mixed gravelly rocky habitats. No significant sediment and macrofauna changes occurred at the three sites after rake harvesting. Nevertheless, the number of clams decreased significantly after raking on the gravelly habitat, whereas in the other two habitats, sediment transport in this high-energy hydrodynamic environment was able to transfer clams and other macrofauna species across the fishing sites, thus minimizing the effects of rake harvesting. Therefore, although the effect of rake harvesting appeared limited during winter, the regional impact (high fishing pressure along 60 km of coast) and increase of recreational fishers during summer needed to be studied in the future

Contrôle de surveillance benthique de la Directive Cadre sur l’Eau (2000/60/CE). Volume II : Flore autre que phytoplancton, Année 2018. District Seine-Normandie

This report presents results of the monitoring actions carried out in 2018 (on flora other than phytoplankton) in the water bodies of the Seine-Normandie water district.Ce rapport présente les résultats des opérations menées en 2018 (contrôle de surveillance de la flore autre que phytoplancton) sur l’ensemble des masses d’eau côtières et de transition rattachées au district Seine-Normandie