Relation habitat-recrutement du crabe sanguin Hemigrapsus sanguineus (De Haan, 1835) et du crabe vert Carcinus maenas (Linnaeus, 1758) le long des côtes Normandes

On the French coast, Hemigrapsus sanguineus (H.s) was observed for the first time in 1999 in Le Havre. Since then, H. sanguineus adult population has been spreading along the French coast of the English Channel and have strong interaction with the indigenous crab Carcinus maenas (C.m). Juveniles populations of H. sanguineus and C. maenas are preferentially present in mussel beds (279 ± 108 ind·m−2 for H.s and 238 ± 77 ind·m−2 for C.m) and barnacles (63 ± 16 ind·m−2 for H.s and 28 ± 9 ind·m−2 for C.m). On the contrary, within macroalgae dominated habitats, only juveniles of C. maenas were observed (30 ± 11 ind·m−2)

Evaluation des infiltrations radioguidées dans le traitement de la douleur

AIX-MARSEILLE2-BU Méd/Odontol. (130552103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Relation habitat-recrutement du crabe sanguin Hemigrapsus sanguineus (De Haan, 1835) et du crabe vert Carcinus maenas (Linnaeus, 1758) le long des côtes Normandes

On the French coast, Hemigrapsus sanguineus (H.s) was observed for the first time in 1999 in Le Havre. Since then, H. sanguineus adult population has been spreading along the French coast of the English Channel and have strong interaction with the indigenous crab Carcinus maenas (C.m). Juveniles populations of H. sanguineus and C. maenas are preferentially present in mussel beds (279 ± 108 ind·m−2 for H.s and 238 ± 77 ind·m−2 for C.m) and barnacles (63 ± 16 ind·m−2 for H.s and 28 ± 9 ind·m−2 for C.m). On the contrary, within macroalgae dominated habitats, only juveniles of C. maenas were observed (30 ± 11 ind·m−2)

The invasive species Rangia cuneata : A new food source for herring gull ( Larus argentatus )?

International audienceContinued human population growth and the associated development ofcoasts lead to dramatic effects on marine coastal ecosystems altering foodresources and habitats for several species and resulting in novel species interactions.The Bay of the Seine, located in the eastern part of the EnglishChannel, is one of the most anthropized sea in the world. Here, we report anobservation of the European herring gulls (Larus argentatus) feeding on thenonindigenous species (NIS) Rangia cuneata in the Bay of the Seine. Observationsof otter prints (Lutra lutra) and excrements were also found near thebivalves, suggesting that this species also feed on the NIS bivalve. Our studysuggests that the spread of NIS in coastal marine ecosystem is expected todrive changes in the foraging behavior of top predators

First record of the non-native isopod Paranthura japonica Richardson, 1909 in the English Channel

International audienceSpecimens of the Asiatic isopod Paranthura japonica Richardson, 1909 were retrieved for the first time in 2019 from two harbours situated along the Normandy coast in the north of France: Le Havre (295 specimens), and Cherbourg (four specimens). Paranthura japonica was accidently introduced for the first time in Europe in the Archachon Bay in 2013 through oyster transfer. This species, native to the Sea of Japan, may have been introduced to the English Channel through the accumulated fouling of the hulls of ships used primarily for recreational purposes

First record of the non-indigenous isopod Ianiropsis serricaudis Gurjanova, 1936 along the French coast of the English Channel

International audienceSpecimens of the NorthWest Pacific Ocean isopod Ianiropsis serricaudis Gurjanova, 1936 were collected for the first time in 2019 from a harbour situated on the Normandy coast in northern France: Le Havre (192 specimens). I. serricaudis was recorded for the first time in Europe in the Netherlands in 2000 and for the first time in France (Arcachon) in 2013, the latter occurrence being due to oyster transfers. Although this species is non-indigenous to Normandy waters, it may have been introduced to France by oyster culture or by the fouling of the hulls of ships navigating between European countries and France