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Category Text Publication
Reference Category Journals
DOI 10.1007/s10750-015-2526-4
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Title (Primary) Length–mass relationships for lake macroinvertebrates corrected for back-transformation and preservation effects
Author Mährlein, M.; Pätzig, M.; Brauns, M.; Dolman, A.M.
Source Titel Hydrobiologia
Year 2016
Department FLOEK
Volume 768
Issue 1
Page From 37
Page To 50
Language englisch
Keywords Preservation conversion factor – Smearing factor – Length–mass relationships – Macroinvertebrates – Additive vs. multiplicative errors – Log-linear vs. nonlinear regression
UFZ wide themes RU2;
Abstract Length–mass relationships are widely used to estimate body mass from body dimensions for freshwater macroinvertebrates. The relationships are influenced by environmental conditions and should be applied within ecosystems and geographic regions similar to those for which they were estimated. However, very few relationships exist for littoral macroinvertebrates, and thus we provide length–mass relationships for macroinvertebrates from lakes of the Central European lowlands. We compared log-linear and nonlinear methods for fitting length–mass relationships and tested the smearing factor for removing bias in mass predictions from log-linear models. We also estimated conversion factors to correct for mass changes during ethanol preservation and assessed the transferability of our results to different geographical regions. We showed that the log-linear approach gave better results in fitting length–mass relationships, while residuals showed that nonlinear models over-predict the mass of small individuals. The smearing correction factor successfully removed bias introduced by log transformation, and relationships transferred well between lakes in the same and different geographical regions. In total, 52 bias-corrected length–mass relationships are provided for littoral macroinvertebrates that are applicable also to lakes in geographic regions with similar environmental conditions, such as the Central European lowlands or the temperate lowland zone of America.
Persistent UFZ Identifier
Mährlein, M., Pätzig, M., Brauns, M., Dolman, A.M. (2016):
Length–mass relationships for lake macroinvertebrates corrected for back-transformation and preservation effects
Hydrobiologia 768 (1), 37 - 50 10.1007/s10750-015-2526-4