Notes on the composition, abundance and zonation of benthic invertebrate of an artificial rocky shore, Tarkwa bay, Lagos, Nigeria
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Lawal, M. O.
New York Science Journal
The composition abundance spatial and temporal distribution of benthic invertebrates on the artificial rocky shore of Tarkwa bay was investigated between May 2003 and April 2004. Samples were collected or counted in-situ in a 1m2 quadrate along a transect at 2m intervals on the west mole. A total of 15 taxa made up of 14 genera dominated by crustaceans (Chthamalidae) and gastropods (Littorinidae and Patellidae) both accounting for more than 60% of the total number of individuals observed. Using the spatial distribution of the dominant species, two broad zones, Chthamalus/Patella zone, (0 – 6m) and the Littorina zone (4 – 12m) were observed. All species were recorded throughout the study period except for Tectarius granosus and Brachyodonte niger which were not observed in some months. These species appears to be seasonally distributed as they occurred only during late rainy season (August) and dry season months (September – October). Ligia gracilipes and Plagosia depressa were found on the littoral fringes, while the pin-hole limpet, Fissurrella nebecula and the sea urchin, Arbacia lixula were restricted to the sublitoral zone. In general, the distribution of macrobenthic fauna observed at the Tarkwa bay was typical of exposed rocky shore influenced by strong wave and tides.
Tarkwa bay , Benthos , Zonation , Rocky shore , Nigeria , Research Subject Categories::NATURAL SCIENCES
Edokpayi, C. A., Adenle, T. A., and Lawal, M. O. (2010). Notes on the composition, abundance and zonation of benthic invertebrate of an artificial rocky shore, Tarkwa bay, Lagos, Nigeria. New York Sci. J. 3(9): 63-67.