A quantitative analysis of exopodite beating in the larvae of the lobster Homarus gammarus (L.)

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
D L MacmillanM S Laverack

Abstract

Raw data on exopodite beating in the first three developmental stages of the lobster Homarus gammarus were collected and analysed for key beating parameters. The analysis was computer assisted and the main procedures used are described. Beating patterns are the same in all three stages and are usually very regular although perturbations do occur (figures 1, 2). When beating stops the deceleration and subsequent re-acceleration is very rapid (figure 1) and limb movement sequences usually start posteriorly and move forwards (figures 1, 2d). Ipsilateral phase relations are generally maintained at 0.4-0.6 (figures, 3,4) and while the coupling between adjacent exopodites is usually stronger than for those further apart various deviations from this are occasionally seen (figure 5). No significant correlation between the ipsilateral phase relations of adjacent exopodites and base cycle duration was detected for any of the stages (figure 6). Contralateral phase relations undergo a constant progression (figures 7, 9) and this was found to be due to a heterodyne effect (figure 8) also described as gliding coordination. The powerstroke/returnstroke ratio for all stages was approximately 0.5 (figure 10) and no significant correlation was f...Continue Reading

References

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Mar 18, 1976·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·M S LaverackD M Neil
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Citations

Mar 1, 1992·Cell and Tissue Research·D R Stokes, R K Josephson
Jul 10, 2010·Arthropod Structure & Development·Steffen Harzsch, Sabine Kreissl
Jun 29, 2001·The Journal of Experimental Zoology·J M Sullivan, D L Macmillan
Mar 18, 1976·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·D M NeilM S Laverack
Jun 15, 1988·The Journal of Comparative Neurology·C K GovindJ Pearce

Related Concepts

Age Factors
Metazoa
Limb Structure
Tadpole
Homarus
Locomotion
Periodicity

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