TABLE 1
Seasonal variation of iron concentration in algae (Sargassum sp, Ulva sp, Porphyra sp, and Gracilariopsis sp) 
selected for human consumption and collected on the coast of Margarita Island, Venezuela1

1 Values are means ± SD of samples collected at a minimum of 4 beaches, n ¼ 3–18. For Porphyra sp, sampling was performed during 3 consecutive years (n ¼ 3–18).
2 ND, Not determined.