Abstract
The importance of hydrodynamic lift to the autecology of stalked crinoids was evaluated by comparing the maximum hydrodynamic lift experienced by the crinoid crown to the weight of the crinoid in water. Results of the analysis suggest that even under optimum conditions a current velocity of over 20 cm/s would be required to produce enough lift to overcome the animals' weight in water. This implies that under normal conditions crinoids could not function as kites, using the stalk as a tether, unless they possessed some means of reducing their densities. Lift, however, may play a role in the reorientation of crinoids in response to current direction changes, and also in elevating the crown above the substrate following dislodgement or crawling.
Publisher
Cambridge University Press (CUP)
Reference35 articles.
1. Les Crinoïdes pédonculés (Echinodermes) photographiés sur les dorsales océaniques de l'Atlantique et du Pacifique;Roux;Implications biogéographiques. Comptes Rendu Academie Science, Paris, Serie D,1980
2. Function and attachment of the stem in Isocrinidae and Pentacrinitidae: review and interpretation
3. Bau und Funktion der Scyphocrinites-Lobolithen
4. Relocation movement in a stalked crinoid (Echinodermata);Messing;Bulletin of Marine Science,1988
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