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Lifestyle and DNA base composition in polychaetes.

Andrea Tarallo1, Maria Cristina Gambi2, Giuseppe D'Onofrio3

  • 1Stazione Zoologica Anton Dohrn, Department of Biology and Evolution of Marine Organisms, Naples, Italy; and andrea.tarallo010@gmail.com andrea.tarallo@szn.it.

Physiological Genomics
|October 21, 2016
PubMed
Summary

Active lifestyles in polychaetes correlate with higher metabolic rates (MR) and genomic GC content. This finding supports the metabolic rate hypothesis and reveals evolutionary links between activity, MR, and DNA composition across diverse species.

Keywords:
BGCGC%metabolic ratemotilityteleosts

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Area of Science:

  • Marine Biology
  • Genomics
  • Evolutionary Biology

Background:

  • Polychaete worms exhibit diverse lifestyles, ranging from motile to low-motile forms.
  • Previous research suggests a link between metabolic rate and genomic characteristics in some animal groups.

Purpose of the Study:

  • To investigate the relationship between lifestyle, metabolic rate (MR), and genomic GC content in polychaete species.
  • To test the metabolic rate hypothesis and thermostability hypothesis in polychaetes.

Main Methods:

  • Comparative analysis of motile and low-motile polychaete species.
  • Assessment of metabolic rate (MR) and genomic GC content.

Main Results:

  • Motile polychaetes displayed significantly higher metabolic rates (MR) and genomic GC content compared to low-motile species.
  • The observed correlations were independent of phylogenetic relationships.
  • Results align with the metabolic rate hypothesis but not the thermostability hypothesis.

Conclusions:

  • An active lifestyle is associated with both higher metabolic rates and increased genomic GC content in polychaetes.
  • This study provides evidence for a conserved link between lifestyle, metabolism, and DNA base composition, extending from invertebrates to vertebrates.
  • Further research is needed to elucidate the causal mechanisms and explore hypotheses like biased gene conversion.