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Titolo:
DIEL VARIATIONS IN THE VERTICAL-DISTRIBUTION OF COPEPODS OFF THE NORTH COAST OF SPAIN
Autore:
DEPUELLES MLF; VALDES L; VARELA M; ALVAREZOSSORIO MT; HALLIDAY N;
Indirizzi:
INST ESPANOL OCEANOG,CTR OCEANOG BALEARES,POB 291 E-07080 PALMA DE MALLORCA SPAIN PLYMOUTH MARINE LAB PLYMOUTH PL1 3DH DEVON ENGLAND INST ESPANOL OCEANOG,CTR OCEANOG SANTANDER E-39080 SANTANDER SPAIN INST ESPANOL OCEANOG,CTR OCEANOG LA CORUNA E-15080 LA CORUNA SPAIN
Titolo Testata:
ICES journal of marine science
fascicolo: 1, volume: 53, anno: 1996,
pagine: 97 - 106
SICI:
1054-3139(1996)53:1<97:DVITVO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISTRIBUTION PATTERNS; CHLOROPHYLL MAXIMUM; MIGRATION; ZOOPLANKTON; STRATEGY; OCEAN; EGGS;
Keywords:
COPEPODS; VERTICAL DISTRIBUTION; LONGHURST HARDY PLANKTON RECORDER; DIEL VARIABILITY; ZOOPLANKTON BEHAVIOR; BAY OF BISCAY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
M.L.F. Depuelles et al., "DIEL VARIATIONS IN THE VERTICAL-DISTRIBUTION OF COPEPODS OFF THE NORTH COAST OF SPAIN", ICES journal of marine science, 53(1), 1996, pp. 97-106

Abstract

Diel variations in the vertical distribution of copepods were studiedin 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 verticalplane 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 characterisedthe 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 variabilityfactor in the spatial and temporal distribution of the zooplankton populations. (C) 1996 International Council for the Exploration of the Sea

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 20:53:34