Greenish and slimy materials clogging fishing nets in parts of the Lekki Lagoon, Nigeria, were investigated in relation to water quality characteristics. Blooms were caused by the filamentous green alga Spirogyra africana (Fritsch) Czurda, which was the sole causative organism. Evaporative concentration leading to higher nutrients levels, increased light availability, hydrological stability, and absence of aquatic macrophytes covering the water surface are factors that probably encouraged the bloom. Reduced floodwater inputs and improved insolation are also possible implicated causative factors. The bloom condition was only recorded in the dry season and was absent during the rains.
APHA (American Public Health Association). 1998. Standard Methods for the Examination of Water and Waste Water. 20th edn. APHA, New York.
Bold, H. C. 1967. Morphology of Plants. Harper and Row Publishers, New York.
Emmanuel, B. E. In press. The Artisanal Fishing Gears, Crafts Technology and Their Efficiency in the Lekki Lagoon, Nigeria. PhD Thesis. University of Lagos, Nigeria.
Emmanuel, B. E. & Kusemiju, K. 2005. Variations in cast net catches in a tropical brackish water pond. J. Sci. Technol. Environ., 5(1&2), 6–14.
Emmanuel, B. E. & Onyema, I. C. 2006. The plankton and fishes of a tropical creek in south-western Nigeria. Turkish J. Fish. Aquat. Sci., 7(2), 105–114.
Fagade, S. O. 1969. The Biology of Some Fishes and the Fisheries of the Lagos Lagoon. PhD Thesis. University of Lagos, Nigeria.
FAO. 1969. Fisheries Survey in the Western and Mid-Western Regions of Nigeria. FAO/Sf: 74/NIR 6.
Fryer, G. & Iles, T. D. 1972. The Cichlid Fishes and the Great Lakes of Africa. Oliver and Boyd, Edinburgh.
Gerrath, J. F. 2003. Conjugating green algae and desmids. In Freshwater Algae of North America. Ecology and Classification (Wehr, J. D. & Sheath, R. G., eds), pp. 353–381. Academic Press, New York.
doi:10.1016/B978-012741550-5/50010-6
Ikusemiju, K. 1973. A Study of the Catfishes of Lekki Lagoon with Particular Reference to the Species, Chrysichthys walkeri (Bagridae). PhD Thesis, University of Lagos, Nigeria.
Ikusemiju, K. 1975. A comparative racial study of the catfish Chrysichthys nigrodigitatus (Lacepede) from Lagos and Lekki lagoon, Nigeria. Bull FAN, 37A(A), 887–898.
Ikusemiju, K. & Olaniyan, C. I. O. 1977. Distribution, reproduction and growth of the catfish, Chrysichthys walkeri (Gunther) in the Lekki Lagoon, Nigeria. J. Fish Biol., 8, 453–458.
doi:10.1111/j.1095-8649.1976.tb03988.x
Kusemiju, K. 1973. A Study of the Catfishes of Lekki Lagoon with Particular Reference to the Species Chrysichthys walkeri Bagridae. PhD Thesis. University of Lagos, Nigeria.
Nwankwo, D. I. 1988. A preliminary check-list of planktonic algae of Lagos Lagoon. Nigerian
J. Basic Appl. Sci., 2(1), 73–85.
Nwankwo, D. I. 1993. Cyanobacteria bloom species in coastal waters of South Western Nigeria. Arch. Hydrobiol. Suppl., 90, 553–542.
Nwankwo, D. I. 2004. The Microalgae: Our Indispensable Allies in Aquatic Monitoring and Biodiversity Sustainability. Inaugural lecture series. University of Lagos Press, Nigeria.
Nwankwo, D. I. & Akinsoji, A. 1989. The benthic algal community of a sawdust deposition site in Lagos Lagoon. Int. J. Ecol. Environ. Sci., 15, 197–204.
Nwankwo, D. I., Onyema, I. C. & Adesalu, T. A. 2003. A survey of harmful algae in coastal waters of south-western Nigeria. J. Nigerian Environ. Soc., 1(2), 241–246.
Nwankwo, D. I., Onyema, I. C., Labiran, C. O., Otuorumo, O. A., Onadipe, E. I., Ebulu, M. O. & Emubaiye, N. 2004. Notes on the observations of brown water discolouration off the light house beach, Lagos, Nigeria. Discovery Innov., 16(3), 111–116.
Onyema, I. C. & Nwankwo, D. I. 2006. The epipelic assemblage of a polluted estuarine creek in Lagos, Nigeria. Pollut. Res., 25(3), 459–468.
Onyema, I. C. & Nwankwo, D. I. In press. An incidence of substratum dicolouration in a tropical West African lagoon. Zoologist.
Onyema, I. C., Otudeko, O. G. & Nwankwo, D. I. 2003. The distribution and composition of plankton around a sewage disposal site at Iddo, Nigeria. J. Sci. Res. Develop., 7, 11–24.
Onyema, I. C., Okpara, C. U., Ogbebor, C. I., Otudeko, O. & Nwankwo, D. I. 2007. Comparative studies of the water chemistry characteristics and temporal plankton variations at two polluted sites along the Lagos lagoon, Nigeria. Ecol. Environ. Conserv., 13, 1–12.
Reed, W., Burchard, J. A., Hopson, J., Jennes, J. & Ibrahim, Y. 1967. Fish and Fisheries of Northern Nigeria. Ministry of Agriculture, Northern Nigeria, Gaskiya Cooperation, Zaira.
Smith, G. M. 1950. The Fresh-water Algae of the United States. McGraw-Hill, London.
Trewavas, E. 1983. Tilapine Fishes of the Genera Sarotherodon, Oreochromis and Danakilia. The Dorset Press, Dorchester.
Udolisa, R. E. K. & Solarin, B. B. 1979. Design characteristics of cast nets and gillnets in Lagos lagoon, Nigeria. NIOMR Occasional Paper No. 31.
Vanden Bossche, J. P. V. & Bernacsek, G. M. 1990. Source book for the inland fishery resources of Africa. CIFA Technical Paper 18/2. FAO, Rome.
Webb, J. E. 1958. The ecology of Lagos Lagoon. 1: The lagoons of the Guinea coast. Philos. Trans. Roy. Soc. Lond., B, 241, 307–317.
doi:10.1098/rstb.1958.0005
Webb, J. E. 1960. Biology in the tropics. Nature (London), 188(4151), 617–619.
Wehr, J. D. & Sheath, R. G. 2003. Freshwater habitat of algae. In Freshwater Algae of North America. Ecology and Classification (Wehr, J. D. & Sheath, R. G., eds), pp. 11–57. Academic Press, New York.
doi:10.1016/B978-012741550-5/50003-9
Whitford, L. A. & Schmacher, G. H. 1973. A Manual of Freshwater Algae. Sparks Press Raleigh, NC.