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Distribution and retention of the copepod Eurytemora affinis hirundoides in a turbid estuary

Distribution and retention of the copepod Eurytemora affinis hirundoides in a turbid estuary 227 107 107 1 1 J. Castel J. Veiga Institut de Biologie Marine Université de Bordeaux I F-33120 Arcachon France Abstract The spatial and temporal distribution of the copepod Eurytemora affinis hirundoides (Nordquist, 1888) in the Gironde estuary, southwest France, was investigated in 1976, and between 1981 and 1983. The distribution pattern of the population bore a clear relationship to the patterns of water circulation and transport of particulate matter. Laboratory experiments suggested that E. affinis hirundoides is incapable of autonomous displacement against the direction of general circulation and behaves as passive particles. A major problem faced by species living in estuaries is that of the maintenance of endemic populations. Some authors have suggested that behavioural responses may play an important role in minimising population losses. Our study indicated that hydrodynamic processes are sufficient to explain the distribution and retention of E. affinis hirundoides , whose populations are retained in the estuary in the same manner as the suspended sediment. Since the outflow of particulate matter from the Gironde estuary to the sea is very sporadic, we hypothesize that most of the production of E. affinis hirundoides remains within the estuary, and does not fertilize the continental shelf, at least not in the form of particulate organic matter. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Distribution and retention of the copepod Eurytemora affinis hirundoides in a turbid estuary

Marine Biology , Volume 107 (1) – Feb 1, 1990

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References (34)

Publisher
Springer Journals
Copyright
Copyright © 1990 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF01313249
Publisher site
See Article on Publisher Site

Abstract

227 107 107 1 1 J. Castel J. Veiga Institut de Biologie Marine Université de Bordeaux I F-33120 Arcachon France Abstract The spatial and temporal distribution of the copepod Eurytemora affinis hirundoides (Nordquist, 1888) in the Gironde estuary, southwest France, was investigated in 1976, and between 1981 and 1983. The distribution pattern of the population bore a clear relationship to the patterns of water circulation and transport of particulate matter. Laboratory experiments suggested that E. affinis hirundoides is incapable of autonomous displacement against the direction of general circulation and behaves as passive particles. A major problem faced by species living in estuaries is that of the maintenance of endemic populations. Some authors have suggested that behavioural responses may play an important role in minimising population losses. Our study indicated that hydrodynamic processes are sufficient to explain the distribution and retention of E. affinis hirundoides , whose populations are retained in the estuary in the same manner as the suspended sediment. Since the outflow of particulate matter from the Gironde estuary to the sea is very sporadic, we hypothesize that most of the production of E. affinis hirundoides remains within the estuary, and does not fertilize the continental shelf, at least not in the form of particulate organic matter.

Journal

Marine BiologySpringer Journals

Published: Feb 1, 1990

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