Metabolic Effects in the Bivalve Perna perna and Mytilus galloprovincialis: Impact on the Environment due to Contamination by Copper

Table 1

Comparison of nutrients levels in seawater at different periods.

Period	Nitrates			Nitrites
	Mean (mg·L^−1)	RSD (%)	Range (mg·L^−1)	Mean (mg·L^−1)	RSD (%)	Range (mg·L^−1)
0 h	1.11±0.17	30.6	0.64–1.44	0.025±0.011	92.0	0.005–0.049
24 h	1.75±0.09	17.6	1.27–2.30	0.061±0.008	41.0	0.022–0.092
48 h	1.83±0.23	48.1	0.31–3.26	0.058±0.008	54.9	0.012–0.104
72 h	1.84±0.22	45.8	0.87–3.90	0.063±0.008	51.5	0.005–0.111
ANOVA	𝐹=1.16			𝐹=1.79
𝑃	0.34			0.17
Period	Phosphorus			Ammonia nitrogen
	Mean (mg·L^−1)	RSD (%)	Range (mg·L^−1)	Mean (mg·L^−1)	RSD (%)	Range (mg·L^−1)
0 h	0.055±0.039	143.6	0.009–0.172	0.026±0.009^a	57.7	0.015–0.043
24 h	0.100±0.027	89.2	0.016–0.285	0.146±0.018^a	40.2	0.052–0.234
48 h	0.095±0.035	137.3	0.016–0.538	0.214±0.051^a	82.2	0.099–0.705
72 h	0.215±0.069	123.5	0.005–0.865	0.641±0.170^b	99.3	0.057–1.770
ANOVA	𝐹=1.61			𝐹=4.61
𝑃	0.20			0.008

Different letters show means with significant differences (𝑃<0.05).