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Enhancing stocks of the exploited limpet Patella candei d’Orbigny via modifications in coastal engineering
Martins, G.M.; Thompson, R.C.; Neto, A.I.; Hawkins, S.J.; Jenkins, S.R. (2010). Enhancing stocks of the exploited limpet Patella candei d’Orbigny via modifications in coastal engineering. Biol. Conserv. 143: 203-211
In: Biological Conservation. Elsevier: Barking. ISSN 0006-3207, more
Peer reviewed article

Available in Authors 

Keywords
    Distribution patterns; Microhabitats; ANE, Azores [gazetteer]; Marine

Authors  Top 
  • Martins, G.M.
  • Thompson, R.C.
  • Neto, A.I., more
  • Hawkins, S.J.
  • Jenkins, S.R., more

Abstract
    It is widely recognised that microhabitats are important for a variety of marine organisms, yet this knowledge
    has rarely been applied in the construction of engineered structures as a means of enhancing biodiversity
    or populations of species at risk. Here we examined the influence of microhabitats on the
    distribution and survival of the exploited limpet Patella candei on natural shores before determining
    the effect of introducing such habitats to an artificial seawall. On natural shores individuals were associated
    with pits (a natural feature of volcanic rocky shores). Animals inhabiting pits showed reduced mortality
    and were smaller than those on open rock. Microhabitat utilisation was similar over the vertical
    range of distribution of P. candei. Following observation of natural patterns, we applied this knowledge
    by experimentally drilling pits at varying densities and sizes in a seawall that had been constructed with
    simple topographical complexity. Overall, the number of animals increased in areas with experimentally
    increased microhabitat area. There was evidence that this was the result of immigration (larger animals)
    but also of increased recruitment. This study demonstrates one cost-effective way of conciliating the
    need to protect our coastlines while promoting the conservation and stock enhancement of overexploited
    species.

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