transparent gif


Ej inloggad.

Göteborgs universitets publikationer

Passive suspension feeding in Amphiura filiformis (Echinodermata: Ophiuroidea): Feeding behaviour in flume flow and potential feeding rate of field populations

Författare och institution:
Lars-Ove Loo (Institutionen för marin ekologi, Tjärnö marinbiologiska laboratorium); Per R. Jonsson (Institutionen för marin ekologi, Tjärnö marinbiologiska laboratorium); Mattias Skold (-); Örjan Karlsson (Institutionen för marin ekologi, Tjärnö marinbiologiska laboratorium)
Publicerad i:
Mar Ecol-Progr Ser, 139 ( 1-3 ) s. 143-155
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Experimental studies in a laboratory flume show that the sediment-living brittle-star Amphiura filiformis captures suspended particles. Feeding activity is a function of now velocity with few animals extending feeding arms in still water. Flow velocity also affects the orientation of feeding arms, and we suggest that this orientation is partly controlled by A. filiformis. By combining field measurements of current velocity and seston concentration with morphometrics and filtration models, a theoretical encounter rate of suspended particles was calculated for A. filiformis. In terms of organic content, A. filiformis can potentially balance growth and respiration with ingested seston although balance will strongly depend on retention efficiency and particle quality. Detailed measurements of flow around feeding arms revealed complex now patterns that will limit the applicability of available models of food encounter for passive suspension feeders, but our sensitivity analysis indicates that suspended aggregates may be especially important in the nutrition of this species.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper ->
Ekologi ->
Marin ekologi
Amphiura filiformis, behaviour, bio-energetics, brittle-star, encounter rate, flume, passive suspension feeder, skagerrak, PARTICLE CAPTURE, BRITTLE-STAR, MARINE SNOW, GALWAY BAY, WEST-COAST, DYNAMICS, MECHANISMS, EFFICIENCY, FILTRATION, CRINOIDEA
Postens nummer:
Posten skapad:
2010-02-22 20:25

Visa i Endnote-format

Göteborgs universitet • Tel. 031-786 0000
© Göteborgs universitet 2007