High densities of stalked barnacle larvae (Pollicipes pollicipes) inside a river plume

High densities of stalked barnacle larvae (Pollicipes pollicipes) inside a river plume AbstractThe pelagic phases of the commercially important stalked barnacle, Pollicipes pollicipes (Cirripedia: Scalpellomorpha), still remain a knowledge gap due to the extreme paucity of these larvae in the plankton. During four cruises at the Nalón River mouth (Spain, Southern Bay of Biscay) high densities of these larvae were consistently found inside the river plume. Surface currents, hydrographic conditions and meroplankton distributions were measured during each cruise by means of several GPS-tracked drifters, a CTD probe and a surface floating bongo net. Surface abundance of P. pollicipes larvae reached densities over 300 individuals per cubic meter within the plume and only 24 outside, and were strongly and positively correlated with chlorophyll a concentrations. Larvae were probably gathered and entrained into the river plume by offshore convergent currents. We conclude that river plumes might act as nurseries for P. pollicipes larvae due to their enhanced food supply and their mechanistic effect of aggregation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Plankton Research Oxford University Press

High densities of stalked barnacle larvae (Pollicipes pollicipes) inside a river plume

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Publisher
Oxford University Press
Copyright
© The Author 2016. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com
ISSN
0142-7873
eISSN
1464-3774
D.O.I.
10.1093/plankt/fbw093
Publisher site
See Article on Publisher Site

Abstract

AbstractThe pelagic phases of the commercially important stalked barnacle, Pollicipes pollicipes (Cirripedia: Scalpellomorpha), still remain a knowledge gap due to the extreme paucity of these larvae in the plankton. During four cruises at the Nalón River mouth (Spain, Southern Bay of Biscay) high densities of these larvae were consistently found inside the river plume. Surface currents, hydrographic conditions and meroplankton distributions were measured during each cruise by means of several GPS-tracked drifters, a CTD probe and a surface floating bongo net. Surface abundance of P. pollicipes larvae reached densities over 300 individuals per cubic meter within the plume and only 24 outside, and were strongly and positively correlated with chlorophyll a concentrations. Larvae were probably gathered and entrained into the river plume by offshore convergent currents. We conclude that river plumes might act as nurseries for P. pollicipes larvae due to their enhanced food supply and their mechanistic effect of aggregation.

Journal

Journal of Plankton ResearchOxford University Press

Published: Mar 1, 2017

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