%0 Journal Article %J Science of The Total Environment %D 2022 %T Mangrove microbiota along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America): Drivers and potential bioindicators %A Fiard, Maud %A Cuny, Philippe %A Sylvi, Léa %A Cédric Hubas %A Jézéquel, Ronan %A Lamy, Dominique %A Walcker, Romain %A El Houssainy, Amonda %A Heimbürger-Boavida, Lars-Eric %A Robinet, Tony %A Bihannic, Isabelle %A Gilbert, Franck %A Michaud, Emma %A Guillaume Dirberg %A Militon, Cécile %B Science of The Total Environment %V 807 %P 150667 %8 Jan-02-2022 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0048969721057454 %! Science of The Total Environment %R 10.1016/j.scitotenv.2021.150667 %0 Journal Article %J Molecular Ecology %D 2020 %T Spatial gradients of introgressed ancestry reveal cryptic connectivity patterns in a high gene flow marine fish %A Robinet, Tony %A Roussel, Valérie %A Cheze, Karine %A Gagnaire, Pierre‐Alexandre %X Assessing genetic connectivity among populations in high gene flow species is sometimes insufficient to evaluate demographic connectivity. Genetic differentiation quickly becomes zero as soon as a few dozen migrants are exchanged per generation. This provides little information to determine whether migration can ensure demographic coupling. The resulting difficulties in delineating conservation units for the management of commercially exploited marine fish species are well illustrated in the case of the European sea bass (Dicentrarchus labrax). Previous attempts to assess connectivity patterns in the northeast Atlantic have been hampered by a lack of spatial genetic structure. In contrast, mark‐recapture data suggested low migration rates between regional spawning areas. Here, we show how a spatial gradient of introgressed Mediterranean ancestry across the northeast Atlantic reflects cryptic patterns of genetic and demographic connectivity. Using a 1K SNP chip data set in 827 individuals sampled from Portugal to the North Sea, we found null overall genetic differentiation across the northeast Atlantic. We however detected a subtle latitudinal admixture gradient originating at the edge of the contact zone with the Mediterranean sea bass lineage. Two significant breaks in the ancestry gradient at the tip of Galicia and northern Brittany indicated barriers to effective dispersal between demographically distinct units. Moreover, a northward expansion signal in Irish and North Seas was revealed by the surfing of rare Mediterranean alleles at the edge of the species range. Our results show that introgressed ancestry gradients offer a powerful alternative to assess genetic and demographic connectivity when the neutral migration‐drift balance is not informative. %B Molecular Ecology %8 Mar-08-2022 %G eng %U https://onlinelibrary.wiley.com/doi/abs/10.1111/mec.15611 %! Mol Ecol %R 10.1111/mec.15611 %0 Journal Article %J Deep Sea Research Part II: Tropical Studies in Oceanography %D 2019 %T Contrasting biodiversity of eel larvae across the central Indian Ocean subtropical gyre %A Miller, Michael J %A Wouthuyzen, Sam %A Eric Feunteun %A Aoyama, Jun %A Watanabe, Shun %A Syahailatua, Augy %A Kuroki, Mari %A Robinet, Tony %A Hagihara, Seishi %A Otake, Tsuguo %A others %X The unique semi-enclosed Indian Ocean basin includes large Mascarene Plateau banks, offshore coral-reef islands, seasonal equatorial current jets, and cross-basin westward South Equatorial Current (SEC) flow, making it interesting for studying long larval-duration eel larvae (leptocephali) and regional eel biodiversity. Three surveys for leptocephali (in 2003, 2006, 2010) included sampling west of the Mascarene Plateau (west), a major survey and other stations off Sumatra and Java (east), and 2 cross-basin transects across the SEC. The highest numbers of leptocephali species were observed along Sumatra (2003: ~143 species; 2006: 72 species) and south of Java (2010: 69), with intermediate numbers being collected in the western Indian Ocean (2006: 71; 2010: 53) compared to low numbers in the hydrographically variable offshore zones (2006, 2010: 3–27). The larger continental shelf areas along Sumatra including the Mentawai Islands provide more coral reef and other habitats for species such as congrid, muraenid, ophichthid, and chlopsid eels compared to the Mascarene Plateau banks. Some larvae in these areas get transported offshore, but the majority of offshore larvae were of Nemichthyidae and Serrivomeridae mesopelagic eels that were spawning across the basin. Habitat differences between the southern Mascarene Plateau and Sumatra and southern Indonesia along the edge of the high biodiversity Coral Triangle likely explain the higher biodiversity of eel larvae observed along the western side of the basin, which for the Congridae and Ophichthidae included more species than observed previously within the central Indonesian Seas. In addition to local spawning, seasonal currents likely transport larger larvae towards Sumatra from the north or west and larvae may enter the basin from the Indonesian Throughflow in the east, but it is unknown if equatorial jets or the SEC can transport larvae across the whole basin. %B Deep Sea Research Part II: Tropical Studies in Oceanography %V 161 %P 120–131 %G eng %U https://www.sciencedirect.com/science/article/pii/S0967064517304393 %R doi.org/10.1016/j.dsr2.2018.02.012 %0 Journal Article %J Reviews in Fish Biology and Fisheries %D 2018 %T Life history and morphology of Eel Larvae in the Gulf of Guinea of western Africa: revisiting Jacques Blache’s research (1960–1977) 40 years later %A Miller, Michael J %A Robinet, Tony %B Reviews in Fish Biology and Fisheries %V 28 %P 355–379 %G eng