From 1983 to 2011, dissolved oxygen (DO) conditions in the Tapi Estuary changed from normoxic to hypoxic due to increased and untreated discharge of sewage. Both tidal and day-night variations of DO were best explained by hydrographic factors, sewage pollution and phytoplankton dynamics in upper, middle, lower estuary and the coastal water. Hypoxia/anoxia was associated with low-flow periods du...

Sequential extraction of Hg was performed in a core collected from intertidal area in Ulhas Estuary in order to characterize the downward distribution and diagenetic behavior of Hg in a polluted estuary. Concentration of total Hg ranged between 0.46 and 6.40 microg g(-1) with significant decrease in surficial sediment as a result of closing of two Hg-cell based chlor-alkali plants. Results of s...

Sediments from the Belgian North Sea (BNS), the Western Scheldt Estuary (SE) and freshwater watercourses from the Scheldt basin were analysed for eight PBDE congeners, namely BDEs 28, 47, 99, 100, 153, 154, 183 and 209. Previously analysed biological samples from the same locations in the BNS and the SE have been shown to contain large amounts of PBDEs. Surprisingly, PBDE concentrations in the ...

A 56 day feeding trial was conducted to examine the effects of different levels dietary histamine on growth performance, immune response, and intestinal health grouper ( Epinephelus coioides ). Seven isonitrogenous (46%), isolipidic (10%) diets were prepared with supplement 0 (T0), 0.05% (T1), 0.1% (T2), 0.15% (T3), 0.2% (T4), 0.25% (T5), 0.3% (T6), respectively. The results showed that supplem...

The present study was carried out to assess the toxic effect and determine lethal concentration of dried garlic ( Allium sativum ) powder on orange-spotted grouper Epinephelus coioides juveniles. Laboratory static bioassays were conducted 96-h LC 50 different concentrations (0, 30, 60, 90, 120, 150 180 mg L -1 juveniles (mean weight, 35.4±6.18 g mean length, 13.2±0.51 cm). 74.78 with lower uppe...