Relationship between habitat and recruitment of the Asian shore crab Hemigrapsus sanguineus (De Haan, 1835) and the indigenous shore crab Carcinus maenas (Linnaeus, 1758) on Normandy seashores

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 pop...

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Published inAn Aod - Les cahiers naturalistes de l’Observatoire marin
Main Authors Pezy, Jean-Philippe, Raoux, Aurore
Format Journal Article
LanguageEnglish
Published Éditions de l'Institut universitaire européen de la mer 28.02.2023
Subjects
Environmental Sciences
espèce non-indigène
non-indigenous species Mots-clés : compétition
Mytilus edulis
English Channel
Manche
competition
competition English Channel intertidal Mytilus edulis non-indigenous species Mots-clés : compétition espèce non-indigène intertidal Manche Mytilus edulis
intertidal
non-indigenous species
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Summary: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).
ISSN:2263-5718