Fig. 3From: The association of test diameter and gonad weight with some toxic trace metals level in black sea urchin (Stomopneustes variolaris)Relationships of toxic heavy metal concentration in S. variolaris at Beruwala reef. a Hg versus test diameter, b Hg versus total gonad weight, c Cd versus test diameter, d Cd versus total gonad weight, e Pb versus test diameter, f Pb versus total gonad weight, g As versus test diameter, h As versus total gonad weightBack to article page