Impact of recreational harvesting on assemblages in artificial rocky habitats

Published source details Airoldi L., Bacchiocchi F., Cagliola C., Bulleri F. & Abbiati M. (2005) Impact of recreational harvesting on assemblages in artificial rocky habitats. Marine Ecology Progress Series, 299, 55-66.
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This study is summarised as evidence for the following.

	Action	Category
	Manage or restrict harvesting of species on intertidal artificial structures Action Link
	Manage or restrict harvesting of species on subtidal artificial structures Action Link

Manage or restrict harvesting of species on intertidal artificial structures

A replicated, randomized study in 2001–2002 on intertidal breakwaters and groynes in five sites on open coastline in the Adriatic Sea, Italy (Airoldi et al. 2005) reported that making access to the breakwaters illegal did not prevent people from harvesting invertebrates and fishes on and around them. At four sites, an average of 0–2 harvesters/2-hour survey were recorded on breakwaters, despite access being illegal. At one site where breakwaters (access illegal) and groynes (access legal) were studied simultaneously, an average of 0–5 harvesters/2-hour survey were recorded. At this site >70% of observations were on groynes, but harvesting also occurred on breakwaters (details not reported). Harvesting species on breakwaters was restricted by making access illegal, but with no apparent enforcement (timing and other details not reported). The number of people harvesting invertebrates and fishes on breakwaters at each of five sites was counted during 2-hour surveys on 152 randomly-selected days between November 2001 and November 2002. Observations at one of the sites included harvesting on groynes, to which access was legal.

(Summarised by: Ally Evans)
Manage or restrict harvesting of species on subtidal artificial structures

A replicated, randomized study in 2001–2002 on subtidal breakwaters and groynes in five sites on open coastline in the Adriatic Sea, Italy (Airoldi et al. 2005) reported that making access to the breakwaters illegal did not prevent people from harvesting invertebrates and fishes on and around them. At four sites, an average of 0–2 harvesters/2-hour survey were recorded on breakwaters, despite access being illegal. At one site where breakwaters (access illegal) and groynes (access legal) were studied simultaneously, an average of 0–5 harvesters/2-hour survey were recorded. At this site >70% of observations were on groynes, but harvesting also occurred on breakwaters (details not reported). Harvesting species on breakwaters was restricted by making access illegal, but with no apparent enforcement (timing and other details not reported). The number of people harvesting invertebrates and fishes on breakwaters at each of five sites was counted during 2-hour surveys on 152 randomly-selected days between November 2001 and November 2002. Observations at one of the sites included harvesting on groynes, to which access was legal.

(Summarised by: Ally Evans)