Adfærdsstudie af polychaet-larver (Polydora spp., Polychaeta): Behavioral study of polychaete larvae (Polydora spp., Polychaeta)

Anette Maria Christensen & Birgitte Nilsson

Studenteropgave: Semesterprojekt

Abstrakt

Swimming behaviour of the polychaete larvae Polydora ligni og Polydora ciliata was studied in three different feeding situations; one without adding any food suspension, one with R. salina and one with G. sanguinium. The purpose of this was to examine their mean swimming patterns, and to determine whether they are active or passive in their feeding selection. The larvae were collected at Isefjords Inderbredning (Denmark) over three times from February untill May 2008. The larvae and their mirrored movement were recorded. From the video recordnings the mean velocity per 25 frames and the size of the larvae could be determined. By analyzing mean velocity as a function of the covered distance, the results showed oscillating swimming patterns. The results showed no siginificant connection between larval size (mm3) and the oscillating frequenzies, and no connection between larval size (mm3) and mean swimming velocity (mm/s) was observed either. This indicates that polychaete larvae (Polydora spp.) have individual variation.

UddannelserBasis - Naturvidenskabelig Bacheloruddannelse, (Bachelor uddannelse) Basis
SprogDansk
Udgivelsesdato23 jun. 2008
VejledereBenni Winding Hansen

Emneord

  • polychaete larvae