01 Jun 2021

01 Jun 2021

Review status: this preprint is currently under review for the journal ESSD.

Weight-to-weight conversion factors for benthic macrofauna: recent measurements from the Baltic and the North Seas

Mayya Gogina1,, Anja Zettler1,, and Michael L. Zettler1 Mayya Gogina et al.
  • 1Biological Oceanography, Leibniz Institute for Baltic Sea Research Warnemünde, Seestraße 15, 18119 Rostock, Germany
  • These authors contributed equally to this work.

Abstract. Estimates of biomass often involve the use of weight-to-weight conversion factors for rapid assessment of dry-weights based metrics from more widely available measurements of wet weights. Availability of standardized biomass data is essential amid research on population dynamics, energy flow, fishery and food web interactions. However, for many species and groups the widely-applicable freely available conversion factors until now remained very rough approximations with high degree of taxonomic generalization. To close up this gap, here for the first time we publish the most detailed and statically robust list of ratios of wet weight (WW), dry weight (DW) and ash-free dry weight (AFDW). The dataset includes over 17000 records of single measurements for 497 taxa. Along with aggregated calculations, enclosed reference information with sampling dates and geographical coordinates provides the broad opportunity for reuse and repurposing. It empowers the future user to do targeted sub selections of data to best combine them with own local data, instead of only having a single value of conversion factor per region. Data can help to quantify natural variability and uncertainty, and assist to refine current ecological theory. The dataset is available via an unrestricted repository from: (Gogina et al., 2021).

Mayya Gogina et al.

Status: open (until 25 Sep 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on essd-2021-157', Mats Lindegart, 09 Jun 2021 reply
    • AC1: 'Reply on CC1', Mayya Gogina, 09 Jun 2021 reply
  • RC1: 'Comment on essd-2021-157', Mats Blomqvist, 22 Jun 2021 reply
    • AC2: 'Reply on RC1', Mayya Gogina, 30 Jun 2021 reply
  • RC2: 'Comment on essd-2021-157', Mats Lindegart, 23 Aug 2021 reply
    • AC3: 'Reply on RC2', Mayya Gogina, 23 Aug 2021 reply

Mayya Gogina et al.

Data sets

Dataset of weight-to-weight conversion factors for benthic macrofauna of the Baltic and the North Seas Mayya Gogina, Anja Zettler, Michael L. Zettler

Mayya Gogina et al.


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Short summary
For the first time we publish taxonomically most detailed and robust data set of biomass conversion factors for macrozoobenthos, often required in broad range of studies. Georeferenced raw data for 497 taxa empowers the user to do best selections for combining with own data, aggregation can help to quantify natural variability and uncertainty, and refine current ecological theory. Standardized measurements were done on material collected for over two decades in the Baltic and the North Seas.