Physiological response of the blue shrimp Litopenaeus stylirostris to short-term confinement on a pond bottom

Type Article
Date 2006-03
Language English
Author(s) Mugnier Chantal1, Lemonnier HuguesORCID1, Legrand Alexandre1
Affiliation(s) 1 : IFREMER, Lab Aquaculture Caledonien, Noumea 98846, New Caledonia.
Source Aquaculture (0044-8486) (Elsevier), 2006-03 , Vol. 253 , N. 1-4 , P. 703-711
DOI 10.1016/j.aquaculture.2005.09.008
WOS© Times Cited 4
Keyword(s) Stress, Pond bottom, Penaeid shrimp, Molt stage, Haemolymph constituents, Litopenaeus stylirostris
Abstract The blue shrimp Litopenaeus stylirostris was exposed to pond sediment for 48 h and its physiological response was studied in relation to molt stage. Shrimp were maintained in cages within a semi-intensive pond after 4 months of rearing. Hypoosmoregulatory capacity (hypo-OC), magnesium ions (Mg ions), glucose, total proteins and oxyhaemocyanin were assayed in haemolymph. An increase of 370% to 500% in Mg ions concentration and 200% to 266% in glucose concentration, and a decrease in hypo-OC in shrimp maintained close to the centre of the pond indicated a short-term stress response in all molt stages. Indicators of water and sediment pore water quality were within normal operating limits, however this area was characterized by high water content and relatively high total ammonia nitrogen in pore water of sediment. To a lesser extent, shrimp maintained in two other stations also presented a stress response. Physiological response of shrimp in molt stage D, compared to C/D-0 and D-2 seems to indicate that shrimp were more sensitive to environment at this stage. The use and choice of physiological parameters to detect shrimp stress in a pond are discussed.
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