Study

Significance of marine protected areas in central Chile as seeding grounds for the gastropod Concholepas concholepas

  • Published source details Manríquez P. & Castilla J. (2001) Significance of marine protected areas in central Chile as seeding grounds for the gastropod Concholepas concholepas. Marine Ecology Progress Series, 215, 201-211.

Actions

This study is summarised as evidence for the following.

Action Category

Establish territorial user rights for fisheries

Action Link
Subtidal Benthic Invertebrate Conservation
  1. Establish territorial user rights for fisheries

    A site comparison study in 1993–1994 in two rocky seabed areas in the South Pacific Ocean, central Chile (Manríquez & Castilla 2001) found that an area with territorial user rights for fisheries had larger-sized and more numerous egg capsules, and more larvae of the Chilean abalone Concholepas concholepas compared to an open-access area, up to 21 months after establishing fishing restrictions. Egg capsules were bigger in the semi-restricted area (1.9–2.0 cm) than in the open-access area (1.5–1.6 cm). On average, more egg capsules and larvae were produced annually in the semi-restricted area (1993: 69,300 egg capsules/transect, 429 million larvae/transect; 1994: 76,000 egg capsules, 534 million larvae) than in the open-access area (1993: 6,600 egg capsules, 23 million larvae; 1994: 9,900 egg capsules, 34 million larvae). Between January 1993 and December 1994, one diver surveyed a total of 34 transects (90 m2) across two areas. One area (12 transects in both 1993 and 1994) was under the control of a fishermen’s Union group established in 1993 and semi-restricted to fishing (territorial user rights). The other area was an adjacent open-access fishery ground where harvest of the Chilean abalone occurred year-round (six transects in 1993, four transects in 1994). Along each transects, the diver counted and measured Chilean abalone egg capsules, and estimated the number of larvae.

    (Summarised by: Anaëlle Lemasson)

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