WoRMS source details

Ruwa, 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
5882
Ruwa, R. K. G.; Kanamai; Malindi, B.; Kenya
1989
Macrofaunal composition and zonation on sandy beaches at
Kenya Journal of Sciences (Series B
10: 1-2
Publication
Based 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.
RIS (EndNote, Reference Manager, ProCite, RefWorks)
BibTex (BibDesk, LaTeX)
Date
action
by
2013-01-12 18:30:12Z
created
db_admin

Kenyan Exclusive Economic Zone for Acmaea profunda (Deshayes, 1863) 
Kenyan Exclusive Economic Zone for Balanus amphitrite Darwin, 1854 
Kenyan Exclusive Economic Zone for Dotilla fenestrata Hilgendorf, 1869 
Kenyan Exclusive Economic Zone for Emerita austroafricana Schmitt, 1937 
Kenyan Exclusive Economic Zone for Engina mendicaria (Linnaeus, 1758) 
Kenyan Exclusive Economic Zone for Epixanthus dentatus (White, 1848) 
Kenyan Exclusive Economic Zone for Hippa adactyla Fabricius, 1787 
Kenyan Exclusive Economic Zone for Macrophthalmus (Macrophthalmus) grandidierii A. Milne-Edwards, 1867 
Kenyan Exclusive Economic Zone for Macrophthalmus (Macrophthalmus) milloti Crosnier, 1965 
Kenyan Exclusive Economic Zone for Macrophthalmus (Macrophthalmus) parvimanus Guérin, 1832 
Kenyan Exclusive Economic Zone for Macrophthalmus (Mareotis) depressus Rüppell, 1830 
Kenyan Exclusive Economic Zone for Nassarius arcularia plicatus (Röding, 1798) 
Kenyan Exclusive Economic Zone for Nassarius coronatus (Bruguière, 1789) 
Kenyan Exclusive Economic Zone for Nassarius margaritifera (Dunker, 1847) 
Kenyan Exclusive Economic Zone for Natica gualteriana Récluz, 1844 
Kenyan Exclusive Economic Zone for Nerita (Linnerita) polita Linnaeus, 1758 
Kenyan Exclusive Economic Zone for Ocypode ceratophthalmus (Pallas, 1772) 
Kenyan Exclusive Economic Zone for Ocypode cordimana Latreille, 1818 
Kenyan Exclusive Economic Zone for Ocypode ryderi Kingsley, 1880 
Kenyan Exclusive Economic Zone for Petrolisthes rufescens (Heller, 1861) 
Kenyan Exclusive Economic Zone for Polinices mammilla (Linnaeus, 1758) 
Kenyan Exclusive Economic Zone for Scylla serrata (Forskål, 1775) 
Kenyan Exclusive Economic Zone for Strombus gibberulus Linnaeus, 1758 
Kenyan Exclusive Economic Zone for Thalamita crenata Rüppell, 1830 
Kenyan Exclusive Economic Zone for Thalamita gatavakensis Nobili, 1906 
 Description

Habitat: muddy shores [details]

 Habitat

Wet sandy beach. [details]

 Habitat

Wet fine sandstore [details]

 Habitat

Burrows in mangrove forests. [details]

 Habitat

Burrows in mangrove forests. [details]

 Habitat

Burrows in mangrove forests. [details]

 Habitat

Sandy beaches. [details]

 Habitat

On mangrove trees. [details]

 Habitat

On mangrove trees bordering rocky cliffs. [details]

 Habitat

Burrows in mangrove vegetation. [details]

 Habitat

On mangrove trees bordering rocky cliffs. [details]

 Habitat

Burrows in beaches with mangrove vegetation. [details]

 Habitat

Burrows in beaches with mangrove vegetation. [details]

 Habitat

Burrows in beaches with mangrove vegetation. [details]

 Remark

Also sub-genus Holometopus in Dahdouh, 1994<247>. [details]

 Remark

Also subgenus Parasesarma in Dahdouh, 1994<247>. [details]

 Spelling

N margaritiferus in Spry 1961 [details]

 Spelling

S. elongata in Barnard 1955. [details]

 synonymy

Vannini, pers. Comm. [details]