{"refrec":{"BRefID":126833,"RR":"<b>Peck, M.A.; Daewel, U.</b> (2007). Physiologically based limits to food consumption, and individual-based modeling of foraging and growth of larval fishes. <i>Mar. Ecol. Prog. Ser. 347</i>: 171-183. <a href=\"http://dx.doi.org/10.3354/meps06976\" target=\"_blank\">http://dx.doi.org/10.3354/meps06976</a>","BEntID":120912,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 347</i>: 171-183. <a href=\"https://dx.doi.org/10.3354/meps06976\" target=\"_blank\">https://dx.doi.org/10.3354/meps06976</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Peck, M.A.; Daewel, U.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Peck, M.A.; Daewel, U.","Englishabstract":"Larval fish individual-based models (IBMs) that include foraging subroutines to depict prey encounter, capture and ingestion often include static parameters (e.g. a maximum feeding rate, C<sub>MAX</sub>) to prevent 'overfeeding' and unrealistically high growth rates. We formulated 2 physiologically based approaches to limit food consumption rate (C) based on gut capacity and evacuation rate (<i>GER</i>) and feeding rate-dependent changes in assimilation efficiency (<i>AE</i>). Parameterizations were based on data reported for a variety of marine and freshwater teleost larvae. The effects of the 3 approaches (C<sub>MAX</sub>, <i>GER</i> and <i>AE</i>) on feeding and growth were compared in IBM simulations of 12 mm larval sprat <i>Sprattus sprattus</i> L. foraging within homogenous and patchy prey fields. Prey concentrations for maximum growth were between 5 and 10 copepodites l<sup>-1</sup>, similar to thresholds determined for successful foraging by larvae of other marine fish species in laboratory studies. The <i>AE</i> limit allowed larvae to exploit prey patches (to consume prey at higher rates but at lower <i>AE</i>s). In simulations using prey concentrations observed in productive areas of the southern North Sea (e.g. 21.0 copepodites l<sup>-1</sup>), larvae benefited little (benefited much) from adopting this patch feeding strategy when patch prey concentrations were <2-fold (>5-fold) those outside of the patches. At <10 copepodites l-1, foraging model predictions of C were close to limits imposed by <i>C</i> <sub>MAX</sub>, <i>GER</i> and <i>AE</i> methods. In patches (20 to 40 copepodites l<sup>-1</sup>), foraging model estimates of <i>C</i> were 2- to 4-fold greater than the highest (<i>AE</i>-based) limit. Physiological-based limits to <i>C</i> are recommended for larval fish IBMs and will be necessary to adequately assess the impacts of prey patchiness on survival and growth of marine fish larvae. 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