• Publications
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Diet of worms emended: an update of polychaete feeding guilds.
TLDR
Polychaetes are common in most marine habitats and dominate many infaunal communities and now include osmotrophic siboglinids as well as sipunculans, echiurans, and myzostomes, which molecular genetic analyses have placed within Annelida.
The biomechanics of burrowing and boring
  • K. Dorgan
  • Biology, Medicine
    Journal of Experimental Biology
  • 15 January 2015
TLDR
Despite substantial differences in the mechanics of the media, similar burrowing behaviors are effective in mud and sand.
Burrowing in marine muds by crack propagation: kinematics and forces
TLDR
This measurement of forces exerted by burrowers is the first that explicitly considers the mechanical behavior of the sediment, showing that crack propagation is a mechanically feasible mechanism of burrowing.
Burrowing mechanics: Burrow extension by crack propagation
TLDR
It is shown that burrowers can progress through impeding, muddy, cohesive sediments by using a mechanically efficient, previously unsuspected mechanism — crack propagation — in which an alternating ‘anchor’ system of burrowing serves as a wedge to extend the crack-shaped burrow.
Energetics of burrowing by the cirratulid polychaete Cirriformia moorei
TLDR
This result suggests that the energy to burrow, which could come from aerobic or anaerobic sources, is not a substantial component of the total metabolic energy of a worm.
Phylogenetic systematics of the genus Platydoris (Mollusca, Nudibranchia, Doridoidea) with descriptions of six new species
TLDR
Phylogenetic systematics of the genus Platydoris (Mollusca, Nudibranchia, Doridoidea) with descriptions of six new species is published.
Macrofaunal burrowing : The medium is the message
Burrowing by benthic infauna mixes both sediment grains and interstitial fluids, affect- ing sedimentary redox conditions and determining fates of organic matter and pollutants. Explicit,
It's tough to be small: dependence of burrowing kinematics on body size
TLDR
The greater relative body thickness and shape changes of smaller worms are consistent with ontogenetic changes in forces exerted by earthworms, and are likely driven by the challenge of exerting enough stress to extend a crack with a small body size.
Worms as wedges: Effects of sediment mechanics on burrowing behavior
TLDR
A dimensionless “wedge” number is introduced to characterize the relative importance of work to fracture the material and extend the burrow and work to maintain body shape against the elastic restoring force of the material.
Burrow extension with a proboscis: mechanics of burrowing by the glycerid Hemipodus simplex
TLDR
Tests on the polychaetes Nereis virens and Cirriformia moorei and the glycerid polychaete Hemipodus simplex illustrate that similar mechanisms of burrowing are used by morphologically different burrowers.
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