|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|
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
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