%0 Journal Article %J Marine Environmental Research %D 2019 %T Functional traits unravel temporal changes in fish biomass production on artificial reefs %A Cresson, Pierre %A Le Direach, Laurence %A Rouanet, Elodie %A Goberville, Eric %A Astruch, Patrick %A Ourgaud, Mélanie %A Mireille Harmelin-Vivien %K Artificial reefs %K Fish biomass production %K Isotopic functional indices %K Mediterranean sea %X

Artificial reefs (ARs) are deployed worldwide as they are expected to support fisheries management. While the underlying mechanisms remain widely debated, production was recently determined as the most probable cause of increases in fish biomass. Changes in fish biomass in a temperate AR system were investigated from December 2008 to November 2015 by considering seven distinct functional groups, and isotopic functional indices were used to identify how these changes may have affected organic matter (OM) fluxes. Contrasting patterns of change were observed between functional trophic groups, highlighting that combining the biomass of all species present in a community is inappropriate for assessing AR-induced effects. Benthic sedentary species predominated (>75% of the total biomass) through massive production, with a 68-fold increase in mean biomass over the study period. Mobile species tended to vary seasonally, suggesting only a slight influence of AR. Zooplanktivores biomass decreased over the 6-year period, as a possible result of changes in environmental conditions. Isotopic indices helped to reveal both the community maturation and the importance of local OM sources not only in supporting fish biomass production but also in attracting pelagic species. Our results corroborate that production and attraction are two extremes of a range of contrasting patterns and highlight the importance of considering the specific responses of functional components of fish communities to accurately describe changes in AR functioning. Functional attributes such as trophic traits, habitat use and dispersal abilities must not be overlooked as they modulate fish species responses to the deployment of man-made rocky substrates.

%B Marine Environmental Research %V 145 %P 137-146 %G eng %U http://www.sciencedirect.com/science/article/pii/S0141113618307979 %R https://doi.org/10.1016/j.marenvres.2019.02.018 %0 Journal Article %J Aquatic Botany %D 2017 %T Resource use of three juvenile scarids (Cryptotomus roseus, Scarus iseri, Sparisoma radians) in Caribbean seagrass beds %A Charlotte R. Dromard %A Vaslet, Amandine %A Gautier, F %A Yolande Bouchon-Navaro %A Mireille Harmelin-Vivien %A Claude Bouchon %X

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

%B Aquatic Botany %V 136 %P 1-8 %G eng %R DOI: 10.1016/j.aquabot.2016.08.003 %0 Journal Article %J Journal of Sea Reasearch %D 2015 %T Diversity of trophic niches among herbivorous fishes on a Caribbean reef (Guadeloupe, Lesser Antilles), evidenced by stable isotope and gut content analyses %A Charlotte R. Dromard %A Yolande Bouchon-Navaro %A Mireille Harmelin-Vivien %A Claude Bouchon %K Caribbean reefs %K functional diversity %K gut contents %K herbivorous fishes %K Stable isotopes %K trophic niches %B Journal of Sea Reasearch %V 95 %P 124-131 %G eng %0 Journal Article %J Ciencias marinas %D 2015 %T Foraging habits of reef fishes associated with mangroves and seagrass beds in a Caribbean lagoon: a stable isotope approach. %A Vaslet, Amandine %A Yolande Bouchon-Navaro %A Mireille Harmelin-Vivien %A Lepoint, Gilles %A Louis, Max %A Claude Bouchon %B Ciencias marinas %V 41 %P 217-232 %8 2015 %G eng %N 3 %0 Journal Article %J PLoS ONE %D 2014 %T An ecosystem-based approach to assess the status of a mediterranean ecosystem, the Posidonia oceanica seagrass meadow %A Personnic, S. %A Boudouresque, C.F. %A Astruch, P. %A Ballesteros, E. %A Blouet, S. %A Bellan-Santini, D. %A Bonhomme, P. %A Thibault-Botha, D. %A Eric Feunteun %A Mireille Harmelin-Vivien %A Pergent, G. %A Pergent-Martini, C. %A Pastor, J. %A Poggiale, J.-C. %A Renaud, F. %A Thibaut, T. %A Ruitton, S. %B PLoS ONE %V 9 %G eng %U https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0098994 %R 10.1371/journal.pone.0098994