Studies and Transactions on Pollution Assessment of the Lagos Lagoon System, Nigeria - The Land/Ocean Interactions in the Coastal Zone of West and Central Africa - page 73

80

MEAN
PAH

MEAN
PCB

MEAN
OCs 69.50

70

60

50

44.16

40

30

22.58

20

7.08

10

3.09

0

Media

Fig. 8 Mean PBTs in different media of Lagos lagoon in December
2006 (Alani 2011), Note SS Crayfish, SB Macrobranchium Vol-
lenloevensi (Shrimps), CB Callinectus amnicola (adult crabs, had
eggs), CS Callinectus amnicola (young crabs), CE Crab eggs, F1
Caranx hippos(Agaza), F2 Mugil cephalus (mullet), F3 Sphyraena
barracuda (barracuda), F4 Saratherodon melanotheron (Tilapia), F5

Tilapia guineensis (Tilapia), F6 Edmalosa fimbriata (Bonga), F9
Tarpon Atlanticus (megalops), F10 Scomberomorus Tritor (mackerel)
(Ayo), F11 Lutjanus agennes (African red snapper), F12 Pomadasys
Jubelini (Grunter), F15 Chrysichthys Nigrodigitatus (Catfish) (Obo-
kun), F20 Lutjanus Dentatus (African brown snapper)

the highest mean OCs of 13.880 ng/g d. w. was found in
young crabs. These patterns are most likely linked to their
feeding habits, habitat, lipid contents metabolism ability
and physiological characteristics among other factors. In the
fish fillet tissues, the highest mean PAHs of 28.996 ng/g d.
w. was found in agaza; the highest mean PCBs of 1.925 ng/
g d. w. was found in mullets; and the highest mean OCs of
9.986 ng/g d. w. was found in tilapia (Fig. 8 ).

References

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Conclusion

This paper has given an insight into the levels of pollution
of the Lagos Lagoon with respect to PTE, nutrients and
various other organic pollutants. The levels of some of the
pollutants presently in the Lagoon has directly and indi-
rectly affected the environmental, social and economical
benefits derivable from the Lagoon. Indeed with the ser-
vices expectation of the waterbody and the high population
that the estuary/lagoon system supports, consideration of its
designation as an international waterbody and its concom-
itant global attention is now paramount. It is important that
strategies to ensure industries around the lagoon treat their
effluents before discharging into the lagoon are needed.
Also there is the need for the education of all stakeholders
on the effects of indiscriminate dumping of municipal waste
and burning of biomass around the Lagoon. Regulatory
bodies must be encouraged to enforce existing regulations
on municipal waste disposal and effluent discharge into this
lagoon system.

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