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NameRuwa, R.K. (1989). Macrofaunal composition and zonation on sandy beaches at Gazi, Kanamai and Malindi Bay, Kenya. Kenya Journal of Sciences (Series B) 10 (1-2): 31-45
AuthorsRuwa, R. K. G.; Kanamai; Malindi, B.; Kenya
Year1989
TitleMacrofaunal composition and zonation on sandy beaches at
JournalKenya Journal of Sciences (Series B
Suffix10: 1-2
Type Publication
AbstractBased on the crabs which constitute the most conspicuous benthic macrofauna, three biological zones were distinguishable on the Kenyan sandy beaches. These were in a downward shore direction: The Ocypode zone, Dotilla zone and Uca-Macrophthalmus zone which were related to tidal levels, the position of water table and sub-marine groundwater discharge (SGD) or seepage. The Ocypode species which burrow here namely, O. ceratophthalmus, O. ryderi and O. cordimanus. The Dotilla zone extended between MTL and MHWN where the water table was 10-20 cm below the surface of the beach at low tide. The species occupying this zone was almost exclusively Dotilla fenestrata. However, samples of sand collected from the edges of the ebbing and flooding tides were passed through sieve and two species of crabs, Hippa adactyla and Emerita austroafricana, were found. The Uca-Macrophthalmus zone occured between mean tide level (MTL) and mean low water spring (MLWS) where the SGD wetted the biotope throughout the low tide. The Uca species were U. vocans and U. tetragonon. The most common Macropthalmus species were M. grandidieri and M. parvimanus, and the less common ones were M. milloti and M. bosci. There were three species of portunid crabs in the brackish water pools and eight species of gastropods in this zone. In the same zone, the silty sand of Malindi beach had large numbers of Echinodiscus bisperforatus. The present results were compared with those of other parts of the Western Indian Ocean coast and the significance of their similarities and differences is discussed.
Taxa
(10)
Checked: verified by a taxonomic editorDotilla fenestrata Hilgendorf, 1869 (basis of record)
Checked: verified by a taxonomic editorEmerita austroafricana Schmitt, 1937 (basis of record)
Unreviewed: has not been verified by a taxonomic editorEurycarcinus messor (Forskål) accepted as Checked: verified by a taxonomic editorMetopograpsus messor (Forskål, 1775) (basis of record)
Checked: verified by a taxonomic editorEurycarcinus natalensis (Krauss, 1843) (basis of record)
Unreviewed: has not been verified by a taxonomic editorEurycarcinus oceanicus (Jacquinot) accepted as Checked: verified by a taxonomic editorMetopograpsus oceanicus (Hombron & Jacquinot, 1846) (basis of record)
Checked: verified by a taxonomic editorOcypode ryderi Kingsley, 1880 (basis of record)
Checked: verified by a taxonomic editorSelatium elongatum (A. Milne-Edwards, 1869) (basis of record)
Unreviewed: has not been verified by a taxonomic editorSesarma brocki de Man accepted as Checked: verified by a taxonomic editorSelatium brockii (de Man, 1887) (basis of record)
Unreviewed: has not been verified by a taxonomic editorSesarma eulimene de Man represented as Checked: verified by a taxonomic editorSesarma (Sesarma) eulimene de Man, 1895 accepted as Checked: verified by a taxonomic editorChiromantes eulimene (de Man, in Weber, 1897) (basis of record)
Checked: verified by a taxonomic editorSesarma leptosoma Hilgendorf, 1869 accepted as Checked: verified by a taxonomic editorParasesarma leptosoma (Hilgendorf, 1869) (basis of record)
Distributions
(25)
Kenya for Acmaea profunda (Deshayes)
Kenya for Balanus amphitrite Darwin, 1854
Kenya for Dotilla fenestrata Hilgendorf, 1869
Kenya for Emerita austroafricana Schmitt, 1937
Kenya for Engina mendicaria (Linnaeus, 1758)
Kenya for Epixanthus dentatus (White, 1848)
Kenya for Hippa adactyla Fabricius, 1787
Kenya for Macrophthalmus (Macrophthalmus) grandidieri A. Milne-Edwards, 1867
Kenya for Macrophthalmus (Macrophthalmus) milloti Crosnier, 1965
Kenya for Macrophthalmus (Macrophthalmus) parvimanus Guérin, 1834
Kenya for Macrophthalmus (Mareotis) depressus Rüppell, 1830
Kenya for Nassarius arcularia plicatus (Röding, 1798)
Kenya for Nassarius coronatus (Bruguière, 1789)
Kenya for Nassarius margaritifera (Dunker, 1847)
Kenya for Natica gualteriana Récluz, 1844
Kenya for Nerita (Linnerita) polita Linnaeus, 1758
Kenya for Ocypode ceratophthalmus (Pallas, 1772)
Kenya for Ocypode cordimanus Latreille, 1818
Kenya for Ocypode ryderi Kingsley, 1880
Kenya for Petrolisthes rufescens (Heller, 1861)
Kenya for Polinices mammilla (Linnaeus, 1758)
Kenya for Scylla serrata (Forskål, 1775)
Kenya for Strombus gibberulus Linnaeus, 1758
Kenya for Thalamita crenata Rüppell, 1830
Kenya for Thalamita gatavakensis Nobili, 1906
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2013-01-12 18:30:12Z  created  db_admin
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