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Göteborgs universitets publikationer

Development of swimming behaviour in the larva of the ascidian Ciona intestinalis

Författare och institution:
Giuliana Zega (Institutionen för marin ekologi); Michael C. Thorndyke (Institutionen för marin ekologi); Euan R. Brown (-)
Publicerad i:
Journal of Experimental Biology, 209 s. 3405-3412
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
The aim of this study was to characterize the swimming behaviour of C. intestinalis larvae during the first 6 h after hatching by measuring tail muscle field potentials. This recording method allowed a quantitative description of the responses of the larva under light and dark conditions. Three different larval movements were distinguished by their specific frequencies: tail flicks, `spontaneous' swimming, and shadow response, or dark induced activity, with respective mean frequencies of about 10, 22 and 32 Hz. The shadow response develops at about 1.5 h post hatching (h.p.h.). The frequency of muscle potentials associated with this behaviour became higher than those of spontaneous swimming activity, shifting from 20 to 30 Hz, but only from about 2 h.p.h. onwards. Swimming rate was influenced positively for about 25 s after the beginning of the shadow response. Comparison of swimming activity at three different larval ages (0-2, 2-4 and 4-6 h.p.h.) showed that Ciona larvae swim for longer periods and more frequently during the first hours after hatching. Our results provide a starting point for future studies that aim to characterize the nervous control of ascidian locomotion, in wild-type or mutant larvae
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper ->
shadow response, electrophysiology, muscle field potentials, nervous system, locomotion, Ciona intestinalis
Postens nummer:
Posten skapad:
2007-10-30 11:38
Posten ändrad:
2009-01-06 11:23

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