Olson R.J. auteur aut IRD Young J.W. auteur aut IRD Ménard Frédéric auteur aut IRD Potier Michel auteur aut IRD Allain V. auteur aut IRD Goñi N. auteur aut IRD Logan J.M. auteur aut IRD Galván-Magaña F. auteur aut IRD text journalArticle eng text/pdf born digital access Tunas are highly specialized predators that have evolved numerous adaptations for a lifestyle that requires large amounts of energy consumption. Here we review our understanding of the bioenergetics and feeding dynamics of tunas on a global scale, with an emphasis on yellowfin, bigeye, skipjack, albacore, and Atlantic bluefin tunas. Food consumption balances bioenergetics expenditures for respiration, growth (including gonad production), specific dynamic action, egestion, and excretion. Tunas feed across the micronekton and some large zooplankton. Some tunas appear to time their life history to take advantage of ephemeral aggregations of crustacean, fish, and molluscan prey. Ontogenetic and spatial diet differences are substantial, and significant interdecadal changes in prey composition have been observed. Diet shifts from larger to smaller prey taxa highlight ecosystem-wide changes in prey availability and diversity and provide implications for changing bioenergetics requirements into the future. Where tunas overlap, we show evidence of niche separation between them; resources are divided largely by differences in diet percentages and size ranges of prey taxa. The lack of long-term data limits the ability to predict impacts of climate change on tuna feeding behaviour. We note the need for systematic collection of feeding data as part of routine monitoring of these species, and we highlight the advantages of using biochemical techniques for broad-scale analyses of trophic relations. We support the continued development of ecosystem models, which all too often lack the regional-specific trophic data needed to adequately investigate climate and fishing impacts. specialized PACIFIQUE ATLANTIQUE MEDITERRANEE OCEAN INDIEN GOLFE DU MEXIQUE 036 040 126 74 199-344 2016 0065-2881 https://www.documentation.ird.fr/hor/fdi:010068059 10.1016/bs.amb.2016.06.002 0065-2881 [F A010068059] https://www.documentation.ird.fr/hor/fdi:010068059 https://www.documentation.ird.fr/intranet/publi/depot/2016-10-03/010068059.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-10-03 2016-11-04 fdi:010068059 fre