@article{fdi:010068059, title = {{B}ioenergetics, trophic ecology, and niche separation of tunas}, author = {{O}lson, {R}.{J}. and {Y}oung, {J}.{W}. and {M}{\'e}nard, {F}r{\'e}d{\'e}ric and {P}otier, {M}ichel and {A}llain, {V}. and {G}oñi, {N}. and {L}ogan, {J}.{M}. and {G}alván-{M}agaña, {F}.}, editor = {}, language = {{ENG}}, abstract = {{T}unas are highly specialized predators that have evolved numerous adaptations for a lifestyle that requires large amounts of energy consumption. {H}ere 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 {A}tlantic bluefin tunas. {F}ood consumption balances bioenergetics expenditures for respiration, growth (including gonad production), specific dynamic action, egestion, and excretion. {T}unas feed across the micronekton and some large zooplankton. {S}ome tunas appear to time their life history to take advantage of ephemeral aggregations of crustacean, fish, and molluscan prey. {O}ntogenetic and spatial diet differences are substantial, and significant interdecadal changes in prey composition have been observed. {D}iet 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. {W}here 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. {T}he lack of long-term data limits the ability to predict impacts of climate change on tuna feeding behaviour. {W}e 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. {W}e 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.}, keywords = {{PACIFIQUE} ; {ATLANTIQUE} ; {MEDITERRANEE} ; {OCEAN} {INDIEN} ; {GOLFE} {DU} {MEXIQUE}}, booktitle = {}, journal = {{A}dvances in {M}arine {B}iology}, volume = {74}, numero = {}, pages = {199--344}, ISSN = {0065-2881}, year = {2016}, DOI = {10.1016/bs.amb.2016.06.002}, URL = {https://www.documentation.ird.fr/hor/fdi:010068059}, }