The Ecology of Sandy Beaches in the Eastern Cape, South Africa

Population biology and secondary production of the sandhopper Pseudorchestoidea brasiliensis (Amphipoda:Talitridae) at Prainha Beach, Brazil

“…Among those 0rganism.s which are part of the macrofauna of exposed sandy beaches, the talitrid amphipods have received special attention because they are one of the fauna1 dominants (MacIntyre 1963, McLachlan et al 1981, and because they play an important ecological role as decomposers (Griffiths et al 1983). Like other intertidal invertebrates, the sandhoppers of sandy beaches occupy various intertidal or supralittoral habitats and can differ in behavior and population characteristics, including reproductive patterns (Marsden 1991).…”

Macroalgas varadas sobre la superficie de una playa arenosa del sur de Chile: preferencias alimentarias y de habitat de juveniles y adultos de Orchestoidea tuberculata (Nicolet), (Amphipoda, Talitridae)

“…Por otro lado, en la costa norte de Francia, Adin & Riera (2003) encontraron que el anfípodo Talitrus saltator (Montagu) utilizó preferentemente algas pardas por sobre algas verdes y rojas como fuente de alimento, a pesar de que las primeras son generalmente consideradas de menor valor nutritivo. Sin INTRODUCCIÓN Las playas arenosas expuestas se caracterizan por la ausencia de macroalgas adheridas al sustrato; por lo tanto, la mayor parte de la macroinfauna que habita en estos hábitat costeros está representada por especies carroñeras o suspensívoras, las primeras dependientes de subsidios tróficos provenientes de otros sistemas costeros (Griffiths & StentonDozey 1981, McLachlan et al 1981, Griffiths et al 1983. Por lo tanto, el subsidio de alimentos y nutrientes desde otros sistemas, puede tener importantes efectos sobre la macroinfauna de las playas arenosas.…”

A Social Cost-benefit Analysis of a Small-scale Clam Fishery in the Eastern Cape, South Africa

“…Located in the northern sector of the bay and being south-facing, the beach is very exposed to ocean swells, which approach mainly from the south-west (McLachlan 1977a, b, 1980, McLachlan et al 1980. Resultant heavy wave action forms surf zones 150-400 m wide, and the considerable wave energy released in these zones is responsible for driving surf circulation patterns (McLachlan 1983), creating favourable conditions for generating large aggregations of the diatom Anaulus australis (Donn 1987). Such large densities of diatoms (up to 6 × 10 6 cells ml -1 ) support massive populations of intertidal, filter-feeding, benthic macrofauna, dominated by D. serra Hanekom 1979, Donn et al 1986).…”