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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
SourceID5882
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 Checked: verified by a taxonomic editorAcmaea profunda (Deshayes)
Kenya for Checked: verified by a taxonomic editorBalanus amphitrite Darwin, 1854
Kenya for Checked: verified by a taxonomic editorDotilla fenestrata Hilgendorf, 1869
Kenya for Checked: verified by a taxonomic editorEmerita austroafricana Schmitt, 1937
Kenya for Checked: verified by a taxonomic editorEngina mendicaria (Linnaeus, 1758)
Kenya for Checked: verified by a taxonomic editorEpixanthus dentatus (White, 1848)
Kenya for Checked: verified by a taxonomic editorHippa adactyla Fabricius, 1787
Kenya for Checked: verified by a taxonomic editorMacrophthalmus (Macrophthalmus) grandidieri A. Milne-Edwards, 1867
Kenya for Checked: verified by a taxonomic editorMacrophthalmus (Macrophthalmus) milloti Crosnier, 1965
Kenya for Checked: verified by a taxonomic editorMacrophthalmus (Macrophthalmus) parvimanus Guérin, 1834
Kenya for Checked: verified by a taxonomic editorMacrophthalmus (Mareotis) depressus Rüppell, 1830
Kenya for Checked: verified by a taxonomic editorNassarius arcularia plicatus (Röding, 1798)
Kenya for Checked: verified by a taxonomic editorNassarius coronatus (Bruguière, 1789)
Kenya for Unreviewed: has not been verified by a taxonomic editorNassarius margaritifera (Dunker, 1847)
Kenya for Checked: verified by a taxonomic editorNatica gualteriana Récluz, 1844
Kenya for Checked: verified by a taxonomic editorNerita (Linnerita) polita Linnaeus, 1758
Kenya for Checked: verified by a taxonomic editorOcypode ceratophthalmus (Pallas, 1772)
Kenya for Checked: verified by a taxonomic editorOcypode cordimana Latreille, 1818
Kenya for Checked: verified by a taxonomic editorOcypode ryderi Kingsley, 1880
Kenya for Checked: verified by a taxonomic editorPetrolisthes rufescens (Heller, 1861)
Kenya for Checked: verified by a taxonomic editorPolinices mammilla (Linnaeus, 1758)
Kenya for Checked: verified by a taxonomic editorScylla serrata (Forskål, 1775)
Kenya for Checked: verified by a taxonomic editorStrombus gibberulus Linnaeus, 1758
Kenya for Checked: verified by a taxonomic editorThalamita crenata Rüppell, 1830
Kenya for Checked: verified by a taxonomic editorThalamita gatavakensis Nobili, 1906
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2013-01-12 18:30:12Z  created  db_admin
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