{"refrec":{"BRefID":112169,"RR":"<b>Brey, T.; Rumohr, H.; Ankar, S.</b> (1988). Energy content of macrobenthic invertebrates: general conversion factors from weight to energy. <i>J. Exp. Mar. Biol. Ecol. 117(3)</i>: 271-278. <a href=\"https://dx.doi.org/10.1016/0022-0981(88)90062-7\" target=\"_blank\">https://dx.doi.org/10.1016/0022-0981(88)90062-7</a>","BEntID":106753,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>J. Exp. Mar. Biol. Ecol. 117(3)</i>: 271-278. <a href=\"https://dx.doi.org/10.1016/0022-0981(88)90062-7\" target=\"_blank\">https://dx.doi.org/10.1016/0022-0981(88)90062-7</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Brey, T.; Rumohr, H.; Ankar, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Brey, T.; Rumohr, H.; Ankar, S.","Englishabstract":"Energy determinations are laborious and time-consuming. Average conversion factors based on different species form various areas and seasons may often be a shortcut for overcoming this problem. To establish general energy conversion factors for aquatic invertebrate groups, the authors used 376 values of J.mg<sup>-1</sup>DW and 255 values of J.mg<sup>-1</sup> AFDW, representing 308 and 229 species, respectively. The dry-weight-to-energy factors were highly variable both within and between taxonomic groups, eg Porifera, 6.1 J.mg<sup>-1 </sup> DW; insect larvae, 22.4 J.mg<sup>-1</sup> DW (median values). The energy-conversion factors related to AFDW showed a much smaller disperion with a minimum median value of 19.7 J.mg<sup>-1</sup> AFDW (Ascidiacea) and a maximum of 23.8 J.mg<sup>-1</sup> AFDW (insect larvae). Within taxonomic groups, the 95% confidence intervals (AFDW) were only a few percent of the median values. The use of energy-conversion factors based on AFDW is preferable due to their lower dispersion. 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