Oxidative response to Cd and Pb accumulation in coastal fishes of Pattani Bay

Figures & data

Figure 1. Four coastal fish species (S. argus, N. thalassina, P. lineatus and M. cephalus) with depth range and sampling sites form Pattani Bay, Gulf of Thailand (according to www.maps.google.com).

Figure 2. Histogram for liver’s Cd, Pb, MDA, GSH, CAT and SOD of four coastal fish species, * indicates statistical significance. Cd: cadmium; Pb: lead; MDA: malondialdehyde; GSH: reduced glutathione; CAT: catalase; SOD: superoxide dismutase.

Figure 3. Histogram for muscle’s Cd, Pb, MDA, GSH, CAT and SOD of four coastal fish species, * indicates statistical significance. Cd: cadmium; Pb: lead; MDA: malondialdehyde; GSH: reduced glutathione; CAT: catalase; SOD: superoxide dismutase.

Table 1. Sampled fish species and their ecology (according to www.fishbase.se).

Species	Common name	Family	Diet	Habitat type
Scatophagus argus	Spotted scat	Scatophagidae	Worms, crustaceans, insects, plant matter	Harbors, natural embayment, brackish estuaries
Plotosus lineatus	Striped eel catfish	Plotosidae	Crustaceans, molluscs, worms, fish	Coastal benthic, estuaries, tide pools, open coasts
Netuma thalassina	Giant catfish	Ariidae	Crabs, prawns, mantis shrimps, fishes, molluscs	Estuaries
Mugil cephalus	Flathead gray mullet	Mugilidae	Detritus, micro-algae, benthic organisms, zooplankton	Coastal waters, estuaries, rivers

Table 2. The correlation test of Cd, Pb concentrations between liver and muscle.

	Liver vs. muscle
Coastal fish species	Cd		Pb
	Correlation	p-value	Correlation	p-value
Scatophagus argus	0.470	0.1776	0.093	0.8056
Plotosus lineatus	0.146	0.5702	0.725	0.0004^a
Netuma thalassina	−0.171	0.5668	−0.402	0.1579
Mugil cephalus	0.836	<0.0001^a	0.839	<0.0001^a

^aindicates statistical significance.

Table 3. The correlation test of Cd, Pb concentration and tissue’s oxidative status.

Coastal fish species		Cd		Pb
Scatophagus argus		Correlation	p-value	Correlation	p-value
MDA	Liver	0.327	0.3678	−0.345	0.3410
	Muscle	−0.158	0.6729	−0.37	0.3540
GSH	Liver	0.260	0.4811	0.413	0.2454
	Muscle	−0.558	0.0958	−0.521	0.1268
CAT	Liver	0.201	0.5889	0.807	0.0031^a
	Muscle	0.502	0.1446	0.547	0.1044
SOD	Liver	−0.454	0.195	−0.644	0.0430^a
	Muscle	−0.389	0.2779	−0.162	0.6648
Plotosus lineatus		Correlation	p-value	Correlation	p-value
MDA	Liver	0.275	0.3087	−0.203	0.4582
	Muscle	0.514	0.0278^a	−0.177	0.4896
GSH	Liver	0.312	0.2116	0.455	0.0641
	Muscle	0.141	0.6222	−0.128	0.6556
CAT	Liver	−0.186	0.4658	−0.211	0.4057
	Muscle	0.067	0.7952	−0.122	0.6348
SOD	Liver	−0.065	0.8022	−0.090	0.7258
	Muscle	−0.216	0.3957	−0.061	0.8127
Netuma thalassina		Correlation	p-value	Correlation	p-value
MDA	Liver	−0.108	0.7185	−0.469	0.0912
	Muscle	0.388	0.1748	−0.076	0.8015
GSH	Liver	−0.079	0.7939	0.887	<0.0001^a
	Muscle	0.061	0.8386	0.173	0.5617
CAT	Liver	−0.411	0.1469	−0.223	0.4514
	Muscle	−0.058	0.8462	0.320	0.2717
SOD	Liver	−0.455	0.1036	−0.382	0.1816
	Muscle	−0.085	0.7777	0.337	0.2450
Mugil cephalus		Correlation	p-value	Correlation	p-value
MDA	Liver	−0.458	0.0102^a	−0.435	0.0155^a
	Muscle	−0.309	0.0971	−0.388	0.0335^a
GSH	Liver	0.042	0.8255	−0.222	0.2417
	Muscle	0.040	0.8342	0.028	0.8855
CAT	Liver	0.177	0.3527	0.171	0.3700
	Muscle	0.162	0.3963	0.159	0.4056
SOD	Liver	−0.341	0.0648	−0.227	0.2302
	Muscle	0.257	0.1726	−0.017	0.9288

^aindicates statistical significance. 

Cd: cadmium; Pb: lead; MDA: malondialdehyde; GSH: reduced glutathione; CAT: catalase; SOD: superoxide dismutase.

Data availability statement

Data are available upon reasonable request.