Table 3 Concentrations of TPAH (ΣBTEX + ΣPAHs) that inhibit 50% (IC₅₀) and 10% (IC₁₀) metamorphosis of coral and sponge larvae (95% CV intervals) calculated from dose-response curves presented in Figs 1 and 3.

Concentration-response curves for inhibition of metamorphosis of coral larvae in the presence of the major aromatic components found in condensate WAF (μg l⁻¹).

Closed circles represent mean inhibition (%, relative to control) of coral larval metamorphosis to (a) benzene, (b) toluene, (c) p-xylene and (d) naphthalene. Open circles represent mean abnormalities (%) of larvae in the same treatments. Mean ± SE of six replicate exposures. Summary results from these curves can be found in Table 3.

Full size image

339^a

132^b

~16,000

~13,000

80,351

15,559

3,939

2,077

(271–424)

(118–148)

(NA)

(NA)

(70,661–91,369)

(13,054–18,543)

(3423–4532)

(1694–2548)

103

64

NA

NA

31,087

8,282

2,160

1,285

(63–168)

(49–84)

(NA)

(NA)

(23,508–41,109)

(5,416–12,666)

(1,576–2,960)

(797–2,070)

0.871

0.943

0.833

0.867

0.920

0.831

0.891

0.733

180

63

11,000

11,000

34,000

15,000

4,800

1,900

350

130

23,000

23,000

69,000

30,000

9,600

3,800

34.6

52.3

26.9

26.9

61.4

33.3

46.4

27.3

79

75

82

90

84

70

76

67

(±4)

(±5)

(±6)

(±5)

(±4)

(±4)

(±4)

(±4)