The influence of site, season and day of the week on exploitation of rocky intertidal biota in central Transkei, South Africa

Impact of recreational harvesting on assemblages in artificial rocky habitats

“…Durán & Castilla 1989, Kingsford et al 1991, Dye 1992, Addessi 1994, Fanelli et al 1994, Keough & Quinn 1998, Murray et al 1999, Moreno 2001, Majiza & Lasiak 2002. Humans selectively collect organisms for consumption or other purposes, or accidentally damage them by trampling, affecting the structure, the diversity, and the spatial and temporal variability of the assemblages (Boalch et al 1974, Lindberg et al 1998, Castilla 1999, Fraschetti et al 2001, De Boer et al 2002, Milazzo et al 2004).…”

“…In 2001 and 2002, 4 quantitative studies were conducted to estimate the magnitude and frequency of exploitation by people, and to establish whether the intensity of human exploitation varied over space and time depending on several factors (i.e. tide, season, day of week, time of day, location) that had been reported as important in studies on intertidal rocky shores (Kingsford et al 1991, Majiza & Lasiak 2002). Finally, in 2003, an experiment involving the removal of mussels to mimic human harvesting was carried out to identify the effects of mussel exploitation on epibiota.…”

Ecological Dominance Along Rocky Shores, with a Focus on Intertidal Ascidians

“…Similarly, the scarcity of P. stolonifera and P. herdmani along some sections of the South African coast may be an indication of overharvesting (e.g. Kyle et al 1997, Majiza & Lasiak 2010. Future repopulation initiatives may be key for restoring ecosystem functioning, as these aggregations play an important role as bioengineers , Castilla et al 2004b.…”