Nutrient and microbial dynamics in eutrophying shrimp ponds affected or unaffected by vibriosis

Type Article
Date 2010-03
Language English
Author(s) Lemonnier HuguesORCID1, Courties Claude2, 3, Mugnier Chantal1, Torreton Jean-Pascal4, Herbland Alain1
Affiliation(s) 1 : IFREMER, LEAD, Noumea 98846, New Caledonia.
2 : Univ Paris 06, FRE 3247, MBCE, Observ Oceanol, F-66651 Banyuls Sur Mer, France.
3 : CNRS, FRE 3247, MBCE, Observ Oceanol, F-66651 Banyuls Sur Mer, France.
4 : Univ Montpellier 2, IRD UR103, ECOLAG UMR 5119, F-34095 Montpellier 05, France.
Source Marine Pollution Bulletin (0025-326X) (Elsevier), 2010-03 , Vol. 60 , N. 3 , P. 402-411
DOI 10.1016/j.marpolbul.2009.10.012
WOS© Times Cited 21
Keyword(s) Aquaculture, Shrimp, Eutrophication, Ecosystem shift, Phytoplankton, Vibriosis
Abstract A field survey was conducted on two intensive shrimp farms using similar technical practices: one (DF) historically affected by a vibriosis, the other (HC) in which the pathogen has been observed although no mortality event has occurred. Because historical data suggest that eutrophication process may directly or indirectly play a role in the disease outbreak, we focussed our research on its dynamics. A higher variability of the phytoplanktonic compartment linked to an imbalance in the molar N:P ratio was observed in farm DF compared to farm HC, implying a modification on the linkage between the bacteria and phytoplankton compartments at DF. The beginning of the mortality outbreak at DF followed a shift from picoto nanophytoplankton. The organic matter mineralization process at the water-sediment interface may explain the disturbance observed in the water column during eutrophication. The consequences of this disturbance on shrimps' health status and pathogen ecology are discussed. (C) 2009 Elsevier Ltd. All rights reserved.
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