@article {7636, title = {Singular physiological behavior of the scleractinian coral Porites astreoides in the dark phase}, journal = {Coral Reefs}, volume = {doi.org/10.1007/s00338-020-02023-4}, year = {2021}, month = {12/2020}, pages = {139-150}, abstract = {Unlike most other corals that have been declining since the 1980s, the population of Porites astreoides, one of the dominant species of coral in Caribbean reefs, appears to be resilient. We investigated the physiological regulation of the electron transport chain of Symbiodiniaceae chloroplasts during the light / dark transition in P. astreoides compared to nine other common scleractinian corals. Protocols were applied to coral samples in seawater tanks and in situ. The maximum quantum yield (Fv/Fm) in the dark and the effective photochemical efficiency (Fq{\textquoteright}/Fm{\textquoteright}) in the light were measured during light-dark transitions, and alternative electron flow (AEF) mechanisms were evaluated using fluorescence variation in response to serial irradiation pulses (SIP-protocol). The variation in Fv/Fm (ΔYIImax) was calculated after 3 min or 2 h of dark acclimation (ΔYIImax(2h); ΔYIImax(3min)). The three species that belong to the genus Porites (P. astreoides, P. divaricata, P. furcata) showed plastoquinone reduction (PQ) in response to the SIP protocol, unlike all the other species tested. A marked decrease in Fv/Fm (ΔYIImax(2h) = 47.79\%) was observed in P. astreoides in the dark whereas the average ΔYIImax(2h) of the other species tested was 0.677\%. The decrease in ΔYIImax in P. astreoides was due to a significant increase in Fo (ΔFo(2h) = -108.64\% {\textpm} SD 21.48) whereas Fm remained relatively stable. The increase in Fo was attributed to reduction of the PQ pool through a chlororespiration-like mechanism known to reduce the production of reactive oxygen species (ROS). This mechanism was triggered immediately after exposure to the dark, while a brief and moderate light exposure reversed it. Given the ecological success of P. astreoides, we suggest that the high antioxidant capability of this species in the dark phase could be one of the factors favoring its survival in the face of various environmental and anthropogenic threats.
\ }, keywords = {Caribbean reef corals, chlororespiration-like, PAM, resilience}, url = {https://link.springer.com/article/10.1007/s00338-020-02023-4}, author = {Pascal Claquin and Ren{\'e}-Trouillefou, Malika and Pascal Jean Lopez and Japaud, Aur{\'e}lien and Yolande Bouchon-Navaro and S{\'e}bastien Cordonnier and Claude Bouchon} } @article {5439, title = {Identification of a moronecidin-like antimicrobial peptide in the venomous fish Pterois volitans: Functional and structural study of pteroicidin-α.}, journal = {Fish and shellfish Immunology}, year = {2018}, pages = {318-324}, abstract = {

The present study characterizes for the first time an antimicrobial peptide in lionfish (Pterois volitans), a venomous fish. Using a peptidomic approach, we identified a mature piscidin in lionfish and called it pteroicidin-α. We detected an amidated form (pteroicidin-α- CONH2) and a non-amidated form (pteroicidin-α-COOH), and then performed their functional and structural study. Interestingly, the two peptides displayed different antibacterial and hemolytic activity levels. Pteroicidin-α-CONH2\ was bactericidal on human pathogens like Staphylococcus aureus or Escherichia coli, as well as on the fish pathogen Aeromonas salmonicida, while pteroicidin-α-COOH only inhibited their growth. Furthermore, the two peptides induced hemolysis of red blood cells from different vertebrates, namely humans, sea bass and lesser-spotted dogfish. Hemolysis occurred with low concentrations of pteroicidin-α-CONH2, indicating greater toxicity of the amidated form. Circular dichroism analysis showed that both peptides adopted a helical conformation, yet with a greater α-helix content in pteroicidin-α-CONH2. Overall, these results suggest that amidation strongly influences pteroicidin-α by modifying its structure and its physico-chemical characteristics and by increasing its hemolytic activity

}, author = {Houyvet, Baptiste and Yolande Bouchon-Navaro and Bouchon, Claude and Goux, Didier and Bernay, Beno{\^\i}t and Corre, Erwan and C{\'e}line Zatylny-Gaudin} } @article {4780, title = {Resource use of three juvenile scarids (Cryptotomus roseus, Scarus iseri, Sparisoma radians) in Caribbean seagrass beds}, journal = {Aquatic Botany}, volume = {136}, year = {2017}, pages = {1-8}, abstract = {

The bucktooth parrotfish\ Sparisoma radians, the striped parrotfish\ Scarus iseri\ and the bluelip parrotfish\ Cryptotomus roseus\ are three herbivorous fishes commonly found at juvenile stages in Caribbean seagrass beds. While the diet of the three species as adults is relatively well known, few studies have been conducted on the feeding patterns of juveniles. In this study, the resource use of the juveniles of three scarid species were studied using two complementary methods: gut content and stable isotope analyses (13C:12C and\ 15N:14N ratios). Bayesian mixing model approaches were used to calculate the contribution of each food item to fish diets (SIAR, mixing models). The three parrotfish species appeared to rely essentially on the consumption of fleshy macrophytes.\ Cryptotomus roseus\ consumed more benthic invertebrates and presented a higher trophic level than the two other scarid species.\ Scarus iseri\ presented a higher assimilation of benthic biofilm, in accordance with the high percentage of sediment in its gut content, and\ Sparisoma radians\ assimilated more\ Thalassia testudinum\ leaves. This research highlighted a food resources partitioning among the juveniles of the three herbivorous fishes, probably to avoid inter-specific competitive interactions for the most palatable food at a critical stage of their life.

Keywords:\ Gut content analyses; Trophic niche; Stable isotopes analyses

}, doi = {DOI: 10.1016/j.aquabot.2016.08.003}, author = {Charlotte R. Dromard and Vaslet, Amandine and Gautier, F and Yolande Bouchon-Navaro and Mireille Harmelin-Vivien and Claude Bouchon} } @article {4368, title = {The invasive lionfish, Pterois volitans, used as a sentinel species to assess the organochlorine pollution by chlordecone in Guadeloupe (Lesser Antilles)}, journal = {Marine Pollution Bulletin}, volume = {107}, year = {2016}, pages = {102-106}, type = {Journal Article}, author = {Charlotte R. Dromard and Yolande Bouchon-Navaro and S{\'e}bastien Cordonnier and Claude Bouchon} } @article {4192, title = {Level of contamination by metallic trace elements and organic molecules in the seagrass beds of Guadeloupe island.}, journal = {Environmental Science and Pollution Research}, volume = {23}, year = {2016}, month = {2016}, pages = {61-72}, author = {Claude Bouchon and Lemoine, Soazig and Charlotte R. Dromard and Yolande Bouchon-Navaro} } @article {3791, title = {Assessment of the contamination of marine fauna by chlordecone in Guadeloupe and Martinique (Lesser Antilles)}, journal = {Environmental Science and Pollution Research}, year = {2015}, author = {Charlotte R. Dromard and Bodiguel, xavier and Lemoine, Soazig and Yolande Bouchon-Navaro and Reynal, Lionel and Thouard, Emmanuel and Claude Bouchon} } @article {3524, title = {Diversity of trophic niches among herbivorous fishes on a Caribbean reef (Guadeloupe, Lesser Antilles), evidenced by stable isotope and gut content analyses}, journal = {Journal of Sea Reasearch}, volume = {95}, year = {2015}, pages = {124-131}, keywords = {Caribbean reefs, functional diversity, gut contents, herbivorous fishes, Stable isotopes, trophic niches}, author = {Charlotte R. Dromard and Yolande Bouchon-Navaro and Mireille Harmelin-Vivien and Claude Bouchon} } @article {4195, title = {Foraging habits of reef fishes associated with mangroves and seagrass beds in a Caribbean lagoon: a stable isotope approach.}, journal = {Ciencias marinas}, volume = {41}, year = {2015}, month = {2015}, pages = {217-232}, author = {Vaslet, Amandine and Yolande Bouchon-Navaro and Mireille Harmelin-Vivien and Lepoint, Gilles and Louis, Max and Claude Bouchon} }