caa a22 4500 397550952 CHVBK 20180308164750.0 cr unu---uuuuu 161202e199602 xx s 000 0 eng 10.1006/jmsc.1996.0009 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0009 Diel variations in the vertical distribution of copepods off the north coast of Spain [Elektronische Daten] [M. L. Fernández de Puelles, L. Valdés, M. Varela, M. T. Alvarez-Ossorio, N. Halliday] Diel variations in the vertical distribution of copepods were studied in the north coast of Spain and related to the physical and biological structure of the water column. Zooplankton samples were taken at three different stations during a 24 h period, in the proximity of a drogue buoy using a Longhurst Hardy Plankton Recorder (LHPR) sampling net, so that it is assumed that the same water mass was sampled continuously. Physical and other biological parameters were monitored by Conductivity Temperature Depth Recorder (CTD) profiles and vertical Undulating Oceanographic Recorder (UNDULATOR) dips for temperature, salinity, and chlorophyll a. Copepods were counted and classified into seven categories according to their size, and their distribution in the vertical plane was analysed using univariate and multivariate statistical techniques. Vertical distribution of copepods and their developmental stages were mainly determined by chlorophyll distribution and, when a subsurface chlorophyll maximum was present, small copepods and copepodite stages appeared aggregated in this layer. Nocturnal upward movements of the population and an ontogenetic component in the position and behaviour of the community were also important features that characterised the distribution of the community. Those patterns may explain a part of the observed variability of the abundances and distribution of the copepods in the water column. However, the water mass displacement in the 24 h period of study must also be considered as a main variability factor in the spatial and temporal distribution of the zooplankton populations. © 1996 International council for the Exploration of the Sea Articles nationallicence copepods nationallicence vertical distribution nationallicence Longhurst Hardy Plankton Recorder nationallicence diel variability nationallicence zooplankton behaviour nationallicence Bay of Biscay nationallicence de Puelles M. L. Fernández Instituto Español de Oceanografía, Centro Oceanográfico de Baleares P.O. Box 29, 07080 Palma de Mallorca, Spain aut Valdés L. Instituto Español de Oceanografía, Centro Oceanográfico de Santander P.O. Box 140, 39080 Santander, Spain aut Varela M. Instituto Español de Oceanografía, Centro Oceanográfico de La Coruña P.O. Box 130, 15080 La Coruña, Spain aut Alvarez-Ossorio M. T. Instituto Español de Oceanografía, Centro Oceanográfico de La Coruña P.O. Box 130, 15080 La Coruña, Spain aut Halliday N. Plymouth Marine Laboratory Prospect Place, Plymouth, PL1 3DH, U.K aut ICES Journal of Marine Science Oxford University Press 53/1(1996-02), 97-106 1054-3139 53:1<97 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0009 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0009 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Puelles M. L. Fernández Instituto Español de Oceanografía, Centro Oceanográfico de Baleares P.O. Box 29, 07080 Palma de Mallorca, Spain aut NATIONALLICENCE 700 1- Valdés L. Instituto Español de Oceanografía, Centro Oceanográfico de Santander P.O. Box 140, 39080 Santander, Spain aut NATIONALLICENCE 700 1- Varela M. Instituto Español de Oceanografía, Centro Oceanográfico de La Coruña P.O. Box 130, 15080 La Coruña, Spain aut NATIONALLICENCE 700 1- Alvarez-Ossorio M. T. Instituto Español de Oceanografía, Centro Oceanográfico de La Coruña P.O. Box 130, 15080 La Coruña, Spain aut NATIONALLICENCE 700 1- Halliday N. Plymouth Marine Laboratory Prospect Place, Plymouth, PL1 3DH, U.K aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/1(1996-02), 97-106 1054-3139 53:1<97 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford