A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.)
A study has been made of the interrelations between rhythmical exopodite beating in different larval stages and swimmeret beating in poast-larval stages of the lobster Homarus gammarus . Data on exopodite beat cycle durations have been used for statistical comparisons of exopodite performance within...
Published in: | Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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The Royal Society
1976
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Online Access: | http://dx.doi.org/10.1098/rstb.1976.0040 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1976.0040 |
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crroyalsociety:10.1098/rstb.1976.0040 2024-06-02T08:07:51+00:00 A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.) 1976 http://dx.doi.org/10.1098/rstb.1976.0040 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1976.0040 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 274, issue 929, page 87-99 ISSN 0080-4622 2054-0280 journal-article 1976 crroyalsociety https://doi.org/10.1098/rstb.1976.0040 2024-05-07T14:16:40Z A study has been made of the interrelations between rhythmical exopodite beating in different larval stages and swimmeret beating in poast-larval stages of the lobster Homarus gammarus . Data on exopodite beat cycle durations have been used for statistical comparisons of exopodite performance within one larva, and also between different stages of larval development. Inter-exopodite comparisons reveal clear bilateral differences (table 1), although there is no consistently favoured relationship (tables 2 and 3). There are significant differences in cycle duration between the first three developmental stages, with a slight increase at the first moult, and a marked decrease at the second (table 4). However, within each stage the repeat frequency exhibits little change (table 5). Therefore it appears that changes in swimming behaviour occur discontinuously in development, and are associated with the larval moults. It is suggested that changes in beat frequency, and especially the faster beating in stage III, may represent responses to changed loading conditions (table 7). Measurements of swimmeret beating in post-larval lobsters have been analysed in terms of cycle durations, and inter- and intra-segmental phase relations. Swimmeret beating patterns are very regular (figure 1), but not restricted to a narrow range of frequencies (table 6 a ).Intersegmental phase lag remains constant around 0.2 (figure 3) independent of beat frequency (figure 4). Similarly the powerstroke/returnstroke ratio of approximately 0.5 (figure 5) shows no significant correlation with cycle duration (figure 6). Differences emerge in the performance of larval exopodites and post-larval swimmerets (table 6 b ), although the possibility cannot be excluded that the larval exopodite oscillator in some way influences the developing action of the post-larval swimmeret system. Article in Journal/Newspaper Homarus gammarus The Royal Society Philosophical Transactions of the Royal Society of London. B, Biological Sciences 274 929 87 99 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
A study has been made of the interrelations between rhythmical exopodite beating in different larval stages and swimmeret beating in poast-larval stages of the lobster Homarus gammarus . Data on exopodite beat cycle durations have been used for statistical comparisons of exopodite performance within one larva, and also between different stages of larval development. Inter-exopodite comparisons reveal clear bilateral differences (table 1), although there is no consistently favoured relationship (tables 2 and 3). There are significant differences in cycle duration between the first three developmental stages, with a slight increase at the first moult, and a marked decrease at the second (table 4). However, within each stage the repeat frequency exhibits little change (table 5). Therefore it appears that changes in swimming behaviour occur discontinuously in development, and are associated with the larval moults. It is suggested that changes in beat frequency, and especially the faster beating in stage III, may represent responses to changed loading conditions (table 7). Measurements of swimmeret beating in post-larval lobsters have been analysed in terms of cycle durations, and inter- and intra-segmental phase relations. Swimmeret beating patterns are very regular (figure 1), but not restricted to a narrow range of frequencies (table 6 a ).Intersegmental phase lag remains constant around 0.2 (figure 3) independent of beat frequency (figure 4). Similarly the powerstroke/returnstroke ratio of approximately 0.5 (figure 5) shows no significant correlation with cycle duration (figure 6). Differences emerge in the performance of larval exopodites and post-larval swimmerets (table 6 b ), although the possibility cannot be excluded that the larval exopodite oscillator in some way influences the developing action of the post-larval swimmeret system. |
format |
Article in Journal/Newspaper |
title |
A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.) |
spellingShingle |
A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.) |
title_short |
A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.) |
title_full |
A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.) |
title_fullStr |
A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.) |
title_full_unstemmed |
A comparison of beating parameters in larval and post-larval locomotor systems of the lobster Homarus gammarus(L.) |
title_sort |
comparison of beating parameters in larval and post-larval locomotor systems of the lobster homarus gammarus(l.) |
publisher |
The Royal Society |
publishDate |
1976 |
url |
http://dx.doi.org/10.1098/rstb.1976.0040 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1976.0040 |
genre |
Homarus gammarus |
genre_facet |
Homarus gammarus |
op_source |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 274, issue 929, page 87-99 ISSN 0080-4622 2054-0280 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.1976.0040 |
container_title |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
container_volume |
274 |
container_issue |
929 |
container_start_page |
87 |
op_container_end_page |
99 |
_version_ |
1800752979774537728 |